一、STM32工程模板
Library文件夹放置各种库，固定不修改。
//main.c
#include "stm32f10x.h" // Device header
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC, GPIO_Pin_13);
// GPIO_ResetBits(GPIOC, GPIO_Pin_13);
while(1)
{
}
}stlink和stm32连线：
SWDIO->SWIO
GND->GND
SWCLK->SWCLK
3.3V->3V3
二、GPIO输出与输入
GPIO输出
2.1 LED闪烁
添加Delay函数和main.c
//Delay.h
#ifndef __DELAY_H
#define __DELAY_H
void Delay_us(uint32_t us);
void Delay_ms(uint32_t ms);
void Delay_s(uint32_t s);
#endif
//Delay.c
#include "stm32f10x.h"
/**
* @brief 微秒级延时
* @param xus 延时时长，范围：0~233015
* @retval 无
*/
void Delay_us(uint32_t xus)
{
SysTick->LOAD = 72 * xus; //设置定时器重装值
SysTick->VAL = 0x00; //清空当前计数值
SysTick->CTRL = 0x00000005; //设置时钟源为HCLK，启动定时器
while(!(SysTick->CTRL & 0x00010000)); //等待计数到0
SysTick->CTRL = 0x00000004; //关闭定时器
}
/**
* @brief 毫秒级延时
* @param xms 延时时长，范围：0~4294967295
* @retval 无
*/
void Delay_ms(uint32_t xms)
{
while(xms--)
{
Delay_us(1000);
}
}
/**
* @brief 秒级延时
* @param xs 延时时长，范围：0~4294967295
* @retval 无
*/
void Delay_s(uint32_t xs)
{
while(xs--)
{
Delay_ms(1000);
}
} //main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
while(1)
{
GPIO_ResetBits(GPIOA, GPIO_Pin_0);
Delay_ms(500);
GPIO_SetBits(GPIOA, GPIO_Pin_0);
Delay_ms(500);
GPIO_WriteBit(GPIOA, GPIO_Pin_0,Bit_RESET);
Delay_ms(500);
GPIO_WriteBit(GPIOA, GPIO_Pin_0,Bit_SET);
Delay_ms(500);
GPIO_WriteBit(GPIOA, GPIO_Pin_0,(BitAction)0);
Delay_ms(500);
GPIO_WriteBit(GPIOA, GPIO_Pin_0,(BitAction)1);
Delay_ms(500);
}
}2.2 LED流水灯
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
while(1)
{
GPIO_Write(GPIOA, ~0x0001); //0000 0000 0000 0001
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0002); //0000 0000 0000 0010
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0004); //0000 0000 0000 0100
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0008); //0000 0000 0000 1000
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0010); //0000 0000 0001 0000
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0020); //0000 0000 0010 0000
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0040); //0000 0000 0100 0000
Delay_ms(100);
GPIO_Write(GPIOA, ~0x0080); //0000 0000 1000 0000
Delay_ms(100);
}
}2.3 蜂鸣器
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
while(1)
{
GPIO_ResetBits(GPIOB, GPIO_Pin_12);
Delay_ms(100);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
Delay_ms(100);
GPIO_ResetBits(GPIOB, GPIO_Pin_12);
Delay_ms(100);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
Delay_ms(700);
}
}
GPIO输入
2.4 按键控制LED
使用到两个LED和两个按键，将这两部分模块化放入Hardware文件夹下。
实现：按键1和2分别控制LED1和2开关。
引脚：LED1 -> PA1，LED2 -> PA2，按键1 -> PB1，按键2 -> PB11<。
//Key.h
#ifndef __KEY_H__
#define __KEY_H__
void Key_Init(void);
uint8_t Key_GetNum(void);
#endif
//Key.c
#include "stm32f10x.h" // Device header
#include "Delay.H"
void Key_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
}
/**
* 函 数：按键获取键码
* 参 数：无
* 返 回 值：按下按键的键码值，范围：0~2，返回0代表没有按键按下
* 注意事项：此函数是阻塞式操作，当按键按住不放时，函数会卡住，直到按键松手
*/
uint8_t Key_GetNum(void)
{
uint8_t KeyNum = 0;
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0)
{
Delay_ms(20);
while(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0);
Delay_ms(20);
KeyNum = 1;
}
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11) == 0)
{
Delay_ms(20);
while(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11) == 0);
Delay_ms(20);
KeyNum = 2;
}
return KeyNum;
}//LED.h
#ifndef __LED_H__
#define __LED_H__
void LED_Init(void);
void LED1_ON(void);
void LED1_OFF(void);
void LED2_ON(void);
void LED2_OFF(void);
void LED1_Turn(void);
void LED2_Turn(void);
#endif
//LED.c
#include "stm32f10x.h" // Device header
void LED_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_1 | GPIO_Pin_2);
}
void LED1_ON(void)
{
GPIO_ResetBits(GPIOA,GPIO_Pin_1);
}
void LED1_OFF(void)
{
GPIO_SetBits(GPIOA,GPIO_Pin_1);
}
void LED1_Turn(void)
{
if(GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_1) == 0) //获取输出寄存器的状态，如果当前引脚输出低电平
{
GPIO_SetBits(GPIOA,GPIO_Pin_1); //则设置PA1引脚为高电平
}
else //否则，即当前引脚输出高电平
{
GPIO_ResetBits(GPIOA,GPIO_Pin_1); //则设置PA1引脚为低电平
}
}
void LED2_ON(void)
{
GPIO_ResetBits(GPIOA,GPIO_Pin_2);
}
void LED2_OFF(void)
{
GPIO_SetBits(GPIOA,GPIO_Pin_2);
}
void LED2_Turn(void)
{
if(GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_2) == 0)
{
GPIO_SetBits(GPIOA,GPIO_Pin_2);
}
else{
GPIO_ResetBits(GPIOA,GPIO_Pin_2);
}
}//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.H"
uint8_t KeyNum;
int main(void)
{
LED_Init();
Key_Init();
while(1)
{
KeyNum = Key_GetNum();
if(KeyNum == 1)
{
LED1_Turn();
}
if(KeyNum == 2)
{
LED2_Turn();
}
}
}
2.5 光敏传感器控制蜂鸣器
使用到光敏传感器和蜂鸣器，将这两部分模块化放入Hardware文件夹下。
实现：遮住光敏传感器，蜂鸣器响。
引脚：蜂鸣器PB12，光敏传感器PB13。
//Buzzer.h
#ifndef __BUZZER_H__
#define __BUZZER_H__
void Buzzer_Init(void);
void Buzzer_ON(void);
void Buzzer_OFF(void);
void Buzzer_Turn(void);
#endif
//Buzzer.c
#include "stm32f10x.h" // Device header
void Buzzer_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_12);
}
void Buzzer_ON(void)
{
GPIO_ResetBits(GPIOB,GPIO_Pin_12);
}
void Buzzer_OFF(void)
{
GPIO_SetBits(GPIOB,GPIO_Pin_12);
}
void Buzzer_Turn(void)
{
if(GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_12) == 0) //获取输出寄存器的状态，如果当前引脚输出低电平
{
GPIO_SetBits(GPIOB,GPIO_Pin_12); //则设置PA1引脚为高电平
}
else //否则，即当前引脚输出高电平
{
GPIO_ResetBits(GPIOB,GPIO_Pin_12); //则设置PA1引脚为低电平
}
}//LightSensor.h
#ifndef __LIGHT_SENSOR_H__
#define __LIGHT_SENSOR_H__
void LightSensor_Init(void);
uint8_t LightSensor_Get(void);
#endif
//LightSensor.c
#include "stm32f10x.h" // Device header
void LightSensor_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
uint8_t LightSensor_Get(void)
{
return GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_13);
}//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.H"
#include "Buzzer.H"
#include "LightSensor.H"
int main(void)
{
Buzzer_Init();
LightSensor_Init();
while(1)
{
if(LightSensor_Get() == 1)
{
Buzzer_ON();
}
else
{
Buzzer_OFF();
}
}
}三、OLED
3.1 OLED显示屏
实现：OLED的基本显示。
引脚：SCL -> PB8，SDA -> PB9。（4针OLED）
//OLED.h
#ifndef __OLED_H
#define __OLED_H
void OLED_Init(void);
void OLED_Clear(void);
void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char);
void OLED_ShowString(uint8_t Line, uint8_t Column, char *String);
void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length);
void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
#endif
//OLED.c
#include "stm32f10x.h"
#include "OLED_Font.h"
/*引脚配置*/
#define OLED_W_SCL(x) GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x))
#define OLED_W_SDA(x) GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x))
/*引脚初始化*/
void OLED_I2C_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_Init(GPIOB, &GPIO_InitStructure);
OLED_W_SCL(1);
OLED_W_SDA(1);
}
/**
* @brief I2C开始
* @param 无
* @retval 无
*/
void OLED_I2C_Start(void)
{
OLED_W_SDA(1);
OLED_W_SCL(1);
OLED_W_SDA(0);
OLED_W_SCL(0);
}
/**
* @brief I2C停止
* @param 无
* @retval 无
*/
void OLED_I2C_Stop(void)
{
OLED_W_SDA(0);
OLED_W_SCL(1);
OLED_W_SDA(1);
}
/**
* @brief I2C发送一个字节
* @param Byte 要发送的一个字节
* @retval 无
*/
void OLED_I2C_SendByte(uint8_t Byte)
{
uint8_t i;
for (i = 0; i < 8; i++)
{
OLED_W_SDA(!!(Byte & (0x80 >> i)));
OLED_W_SCL(1);
OLED_W_SCL(0);
}
OLED_W_SCL(1); //额外的一个时钟，不处理应答信号
OLED_W_SCL(0);
}
/**
* @brief OLED写命令
* @param Command 要写入的命令
* @retval 无
*/
void OLED_WriteCommand(uint8_t Command)
{
OLED_I2C_Start();
OLED_I2C_SendByte(0x78); //从机地址
OLED_I2C_SendByte(0x00); //写命令
OLED_I2C_SendByte(Command);
OLED_I2C_Stop();
}
/**
* @brief OLED写数据
* @param Data 要写入的数据
* @retval 无
*/
void OLED_WriteData(uint8_t Data)
{
OLED_I2C_Start();
OLED_I2C_SendByte(0x78); //从机地址
OLED_I2C_SendByte(0x40); //写数据
OLED_I2C_SendByte(Data);
OLED_I2C_Stop();
}
/**
* @brief OLED设置光标位置
* @param Y 以左上角为原点，向下方向的坐标，范围：0~7
* @param X 以左上角为原点，向右方向的坐标，范围：0~127
* @retval 无
*/
void OLED_SetCursor(uint8_t Y, uint8_t X)
{
OLED_WriteCommand(0xB0 | Y); //设置Y位置
OLED_WriteCommand(0x10 | ((X & 0xF0) >> 4)); //设置X位置高4位
OLED_WriteCommand(0x00 | (X & 0x0F)); //设置X位置低4位
}
/**
* @brief OLED清屏
* @param 无
* @retval 无
*/
void OLED_Clear(void)
{
uint8_t i, j;
for (j = 0; j < 8; j++)
{
OLED_SetCursor(j, 0);
for(i = 0; i < 128; i++)
{
OLED_WriteData(0x00);
}
}
}
/**
* @brief OLED显示一个字符
* @param Line 行位置，范围：1~4
* @param Column 列位置，范围：1~16
* @param Char 要显示的一个字符，范围：ASCII可见字符
* @retval 无
*/
void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char)
{
uint8_t i;
OLED_SetCursor((Line - 1) * 2, (Column - 1) * 8); //设置光标位置在上半部分
for (i = 0; i < 8; i++)
{
OLED_WriteData(OLED_F8x16[Char - ' '][i]); //显示上半部分内容
}
OLED_SetCursor((Line - 1) * 2 + 1, (Column - 1) * 8); //设置光标位置在下半部分
for (i = 0; i < 8; i++)
{
OLED_WriteData(OLED_F8x16[Char - ' '][i + 8]); //显示下半部分内容
}
}
/**
* @brief OLED显示字符串
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param String 要显示的字符串，范围：ASCII可见字符
* @retval 无
*/
void OLED_ShowString(uint8_t Line, uint8_t Column, char *String)
{
uint8_t i;
for (i = 0; String[i] != '\0'; i++)
{
OLED_ShowChar(Line, Column + i, String[i]);
}
}
/**
* @brief OLED次方函数
* @retval 返回值等于X的Y次方
*/
uint32_t OLED_Pow(uint32_t X, uint32_t Y)
{
uint32_t Result = 1;
while (Y--)
{
Result *= X;
}
return Result;
}
/**
* @brief OLED显示数字（十进制，正数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~4294967295
* @param Length 要显示数字的长度，范围：1~10
* @retval 无
*/
void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i;
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i, Number / OLED_Pow(10, Length - i - 1) % 10 + '0');
}
}
/**
* @brief OLED显示数字（十进制，带符号数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：-2147483648~2147483647
* @param Length 要显示数字的长度，范围：1~10
* @retval 无
*/
void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length)
{
uint8_t i;
uint32_t Number1;
if (Number >= 0)
{
OLED_ShowChar(Line, Column, '+');
Number1 = Number;
}
else
{
OLED_ShowChar(Line, Column, '-');
Number1 = -Number;
}
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i + 1, Number1 / OLED_Pow(10, Length - i - 1) % 10 + '0');
}
}
/**
* @brief OLED显示数字（十六进制，正数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~0xFFFFFFFF
* @param Length 要显示数字的长度，范围：1~8
* @retval 无
*/
void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i, SingleNumber;
for (i = 0; i < Length; i++)
{
SingleNumber = Number / OLED_Pow(16, Length - i - 1) % 16;
if (SingleNumber < 10)
{
OLED_ShowChar(Line, Column + i, SingleNumber + '0');
}
else
{
OLED_ShowChar(Line, Column + i, SingleNumber - 10 + 'A');
}
}
}
/**
* @brief OLED显示数字（二进制，正数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~1111 1111 1111 1111
* @param Length 要显示数字的长度，范围：1~16
* @retval 无
*/
void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i;
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i, Number / OLED_Pow(2, Length - i - 1) % 2 + '0');
}
}
/**
* @brief OLED初始化
* @param 无
* @retval 无
*/
void OLED_Init(void)
{
uint32_t i, j;
for (i = 0; i < 1000; i++) //上电延时
{
for (j = 0; j < 1000; j++);
}
OLED_I2C_Init(); //端口初始化
OLED_WriteCommand(0xAE); //关闭显示
OLED_WriteCommand(0xD5); //设置显示时钟分频比/振荡器频率
OLED_WriteCommand(0x80);
OLED_WriteCommand(0xA8); //设置多路复用率
OLED_WriteCommand(0x3F);
OLED_WriteCommand(0xD3); //设置显示偏移
OLED_WriteCommand(0x00);
OLED_WriteCommand(0x40); //设置显示开始行
OLED_WriteCommand(0xA1); //设置左右方向，0xA1正常 0xA0左右反置
OLED_WriteCommand(0xC8); //设置上下方向，0xC8正常 0xC0上下反置
OLED_WriteCommand(0xDA); //设置COM引脚硬件配置
OLED_WriteCommand(0x12);
OLED_WriteCommand(0x81); //设置对比度控制
OLED_WriteCommand(0xCF);
OLED_WriteCommand(0xD9); //设置预充电周期
OLED_WriteCommand(0xF1);
OLED_WriteCommand(0xDB); //设置VCOMH取消选择级别
OLED_WriteCommand(0x30);
OLED_WriteCommand(0xA4); //设置整个显示打开/关闭
OLED_WriteCommand(0xA6); //设置正常/倒转显示
OLED_WriteCommand(0x8D); //设置充电泵
OLED_WriteCommand(0x14);
OLED_WriteCommand(0xAF); //开启显示
OLED_Clear(); //OLED清屏
}
字库：
//OLED_Font.h
#ifndef __OLED_FONT_H
#define __OLED_FONT_H
/*OLED字模库，宽8像素，高16像素*/
const uint8_t OLED_F8x16[][16]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1
0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2
0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,
0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3
0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,
0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4
0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,
0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5
0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,
0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6
0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7
0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,
0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8
0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,
0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9
0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,
0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10
0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,
0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14
0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,
0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,
0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16
0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17
0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,
0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18
0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,
0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19
0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,
0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20
0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,
0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21
0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,
0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22
0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,
0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23
0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,
0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,
0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25
0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,
0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26
0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27
0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,
0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28
0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,
0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29
0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,
0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30
0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,
0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31
0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,
0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32
0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,
0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33
0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,
0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34
0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,
0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35
0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,
0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,
0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,
0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38
0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,
0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,
0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40
0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41
0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,
0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42
0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,
0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43
0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,
0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44
0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,
0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45
0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,
0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,
0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,
0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,
0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,
0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,
0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,
0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,
0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,
0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,
0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,
0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,
0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,
0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58
0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,
0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59
0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\ 60
0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,
0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61
0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63
0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65
0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,
0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66
0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,
0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67
0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,
0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69
0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,
0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71
0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,
0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72
0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73
0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,
0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74
0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,
0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75
0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,
0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77
0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,
0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79
0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,
0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80
0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,
0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81
0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,
0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,
0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83
0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,
0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84
0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,
0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,
0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86
0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,
0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87
0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,
0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,
0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89
0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,
0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90
0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,
0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92
0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,
0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93
0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94
};
#endif
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
int main(void)
{
OLED_Init();
OLED_ShowChar(1,1,'A');
OLED_ShowString(1,3,"Hello!");
OLED_ShowNum(2,1,12345,5);
OLED_ShowSignedNum(2,7,-66,2);
OLED_ShowHexNum(3,1,0xAA55,4);
OLED_ShowBinNum(4,1,0xAA55,16);
while(1)
{
}
}
四、EXIT外部中断
4.1 对射式红外传感器计次
实现：使用对射式红外传感器进行计次 。下降沿触发，每当遮挡物离开红外，则计次1。
关键文件：模块化CounterSensor、main.c
引脚：DO -> PB14。
//CounterSensor.h
#ifndef __CountSensor_H__
#define __CountSensor_H__
void CountSensor_Init(void);
uint16_t CountSensor_Get(void);
#endif
//CounterSensor.c
#include "stm32f10x.h" // Device header
uint16_t CountSensor_Count;
void CountSensor_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource14);//数据选择器
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Line = EXTI_Line14;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
}
uint16_t CountSensor_Get(void)
{
return CountSensor_Count;
}
void EXTI15_10_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line14) == SET)
{
CountSensor_Count ++;
EXTI_ClearITPendingBit(EXTI_Line14);
}
}//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "CountSensor.H"
int main(void)
{
OLED_Init();
CountSensor_Init();
OLED_ShowString(1,1,"Count:");
while(1)
{
OLED_ShowNum(1,7,CountSensor_Get(),5);
}
}
4.2 旋转编码器计次
实现：使用旋转编码器进行计次 。向左旋转数值递减，向右旋转递增。
关键文件：模块化Encoder、main.c
引脚：A -> PB0，B -> PB1。
//Encoder.h
#ifndef __ENCODER_H__
#define __ENCODER_H__
void Encoder_Init(void);
int16_t Encode_Get(void);
#endif
//Encoder.c
#include "stm32f10x.h" // Device header
int16_t Encoder_Count;
void Encoder_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);//数据选择器
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource1);
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_Init(&NVIC_InitStructure);
}
int16_t Encode_Get(void)
{
int16_t Temp;
Temp = Encoder_Count;
Encoder_Count = 0;
return Temp;
}
void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0) == SET)
{
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0)
{
Encoder_Count--;
}
EXTI_ClearITPendingBit(EXTI_Line0);
}
}
void EXTI1_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line1) == SET)
{
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_0) == 0)
{
Encoder_Count++;
}
EXTI_ClearITPendingBit(EXTI_Line1);
}
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Encoder.h"
int16_t Num;
int main(void)
{
OLED_Init();
Encoder_Init();
OLED_ShowString(1,1,"Num:");
while(1)
{
Num+= Encode_Get();
OLED_ShowSignedNum(1,5,Num,5);
}
}
五、TIM定时器
5.1 定时器定时中断
在System文件夹进行Timer模块化。
实现：定时器计时，在OLED上显示，每一秒数字增一。
//Timer.h
#ifndef __TIMER_H__
#define __TIMER_H__
void Timer_Init(void);
#endif
//Timer.c
#include "stm32f10x.h" // Device header
void Timer_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
TIM_InternalClockConfig(TIM2);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 10000-1;
TIM_TimeBaseInitStructure.TIM_Prescaler = 7200-1;
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
TIM_ClearFlag(TIM2,TIM_FLAG_Update);
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
TIM_Cmd(TIM2,ENABLE);
}
/*
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
{
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
*/
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"
uint16_t Num;
int main(void)
{
OLED_Init();
Timer_Init();
OLED_ShowString(1,1,"Num:");
while(1)
{
OLED_ShowNum(1,5,Num,5);
}
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
{
Num++;
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
5.2 定时器外部时钟
实现：外接红外对射式传感器，PA0引脚就是TIM2的ETR引脚，在这个引脚输入一个外部时钟。挡光片每遮挡一次红外对射式传感器，CNT加1，加到9，CNT自动清零，同时申请中断，NUM++。CNT和NUM的值在OLED上显示。
引脚：红外对射式传感器DO -> PA0。OLED接法同上。
//Timer.h
#ifndef __TIMER_H__
#define __TIMER_H__
void Timer_Init(void);
uint16_t Timer_GetCounter(void);
#endif
//Timer.c
#include "stm32f10x.h" // Device header
void Timer_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
TIM_ETRClockMode2Config(TIM2,TIM_ExtTRGPSC_OFF,TIM_ExtTRGPolarity_NonInverted,0x00);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 10-1;
TIM_TimeBaseInitStructure.TIM_Prescaler = 1-1;
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
TIM_ClearFlag(TIM2,TIM_FLAG_Update);
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
TIM_Cmd(TIM2,ENABLE);
}
uint16_t Timer_GetCounter(void)
{
return TIM_GetCounter(TIM2);
}
/*
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
{
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
*/
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"
uint16_t Num;
int main(void)
{
OLED_Init();
Timer_Init();
OLED_ShowString(1,1,"Num:");
OLED_ShowString(2,1,"CNT:");
while(1)
{
OLED_ShowNum(1,5,Num,5);
OLED_ShowNum(2,5,Timer_GetCounter(),5);
}
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
{
Num++;
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
5.3 PWM驱动LED呼吸灯
这里模块化PWM。
实现：LED呼吸灯效果。
引脚：LED接到PA0。
//PWM.h
#ifndef __PWM_H__
#define __PWM_H__
void PWM_Init(void);
void PWM_SetCompare1(uint16_t Compare);
#endif
//PWM.c
#include "stm32f10x.h" // Device header
void PWM_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
//重映射，将PA0转移到PA15
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
// GPIO_PinRemapConfig(GPIO_PartialRemap1_TIM2,ENABLE);
// GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //GPIO_Pin_15
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_InternalClockConfig(TIM2);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 100-1; //ARR
TIM_TimeBaseInitStructure.TIM_Prescaler = 720-1; //PSC
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 50; //CCR
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2,ENABLE);
}
//设置CCR寄存器的值
void PWM_SetCompare1(uint16_t Compare)
{
TIM_SetCompare1(TIM2, Compare);
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "PWM.h"
uint8_t i;
int main(void)
{
OLED_Init();
PWM_Init();
while(1)
{
for(i=0;i<=100;i++)
{
PWM_SetCompare1(i);
Delay_ms(10);
}
for(i=0;i<=100;i++)
{
PWM_SetCompare1(100 - i);
Delay_ms(10);
}
}
}
5.4 PWM驱动舵机
增加PWM、Servo的模块化文件，放入Hardware文件夹内。
实现：通过按键，控制舵机旋转不同的角度（从0°-180°，按键每按一次旋转30°），并在OLED上显示当前角度。
引脚：舵机vcc -> STlink的5V，舵机信号引脚（橙色线）-> PA1。按键接在PB1。OLED的SCL->PB8，SDA->PB9。
//PWM.h
#ifndef __PWM_H__
#define __PWM_H__
void PWM_Init(void);
void PWM_SetCompare2(uint16_t Compare);
#endif
//PWM.c
#include "stm32f10x.h" // Device header
void PWM_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_InternalClockConfig(TIM2);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 20000-1; //ARR
TIM_TimeBaseInitStructure.TIM_Prescaler = 72-1; //PSC
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0; //CCR
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2,ENABLE);
}
//设置CCR寄存器的值
void PWM_SetCompare2(uint16_t Compare)
{
TIM_SetCompare2(TIM2, Compare);
}
//Servo.h
#ifndef __SERVO_H__
#define __SERVO_H__
void Servo_Init(void);
void Servo_SetAngle(float Angle);
#endif
//Servo.c
#include "stm32f10x.h" // Device header
#include "PWM.H"
void Servo_Init(void)
{
PWM_Init();
}
void Servo_SetAngle(float Angle)
{
PWM_SetCompare2(Angle / 180 * 2000 + 500);
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Servo.h"
#include "Key.h"
uint8_t KeyNum;
float Angle;
int main(void)
{
OLED_Init();
Servo_Init();
Key_Init();
OLED_ShowString(1,1,"Angle:");
while(1)
{
KeyNum = Key_GetNum();
if(KeyNum == 1)
{
Angle += 30;
if(Angle > 180)
{
Angle = 0;
}
}
Servo_SetAngle(Angle);
OLED_ShowNum(1,7,Angle,3);
}
}
5.5 PWM驱动直流电机
模块化Motor。
实现：按键控制直流电机的转动速度与方向。正向从0转到100，然后反向从-100到0。OLED上显示速度的多少。
引脚：
TB6612电机驱动模块：VM -> STLink的5V引脚，VCC -> 电源正，GND -> 电源负，AO1和AO2分别接直流电机的两根线，PWMA -> PA2，AN2 -> PA5，AN1-> PA4，STBY -> 电源正。
按键：PB1。OLED接法同上。
//PWM.h
#ifndef __PWM_H__
#define __PWM_H__
void PWM_Init(void);
void PWM_SetCompare3(uint16_t Compare);
#endif
//PWM.c
#include "stm32f10x.h" // Device header
void PWM_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_InternalClockConfig(TIM2);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 100-1; //ARR
TIM_TimeBaseInitStructure.TIM_Prescaler = 36-1; //PSC
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 50; //CCR
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2,ENABLE);
}
//设置CCR寄存器的值
void PWM_SetCompare3(uint16_t Compare)
{
TIM_SetCompare3(TIM2, Compare);
}
//Motor.h
#ifndef __MOTOR_H__
#define __MOTOR_H__
void Motor_Init(void);
void Motor_SetSpeed(int8_t Speed);
#endif
//Motor.c
#include "stm32f10x.h" // Device header
#include "PWM.H"
void Motor_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
PWM_Init();
}
void Motor_SetSpeed(int8_t Speed)
{
if(Speed >= 0)
{
GPIO_SetBits(GPIOA, GPIO_Pin_4);
GPIO_ResetBits(GPIOA, GPIO_Pin_5);
PWM_SetCompare3(Speed);
}
else
{
GPIO_ResetBits(GPIOA, GPIO_Pin_4);
GPIO_SetBits(GPIOA, GPIO_Pin_5);
PWM_SetCompare3(-Speed);
}
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Motor.h"
#include "Key.h"
uint8_t KeyNum;
int8_t Speed;
int main(void)
{
OLED_Init();
Motor_Init();
Key_Init();
OLED_ShowString(1,1,"Speed:");
while(1)
{
KeyNum=Key_GetNum();
if(KeyNum == 1)
{
Speed += 20;
if(Speed >100)
{
Speed = -100;
}
}
Motor_SetSpeed(Speed);
OLED_ShowSignedNum(1,7,Speed,3);
}
}
5.6 输入捕获模式测频率
创建新的文件模块化IC输入捕获到Hardware文件夹。
实现：PWM模块将待测信号输出到PA0，PA0又通过导线，输入到PA6。PA6是TIM3的通道1，通道1通过输入捕获模块，测量得到频率。OLED不断刷新显示频率。
连线：使用一根飞线PA0 -> PA6
//PWM.h
#ifndef __PWM_H__
#define __PWM_H__
void PWM_Init(void);
void PWM_SetCompare1(uint16_t Compare);
void PWM_SetPrescaler(uint16_t Prescaler);
#endif
//PWM.c
#include "stm32f10x.h" // Device header
void PWM_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_InternalClockConfig(TIM2);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 100-1; //ARR
TIM_TimeBaseInitStructure.TIM_Prescaler = 720-1; //PSC
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 50; //CCR
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2,ENABLE);
}
//设置CCR寄存器的值，改变通道1的占空比
void PWM_SetCompare1(uint16_t Compare)
{
TIM_SetCompare1(TIM2, Compare);
}
//改变频率PSC
void PWM_SetPrescaler(uint16_t Prescaler)
{
TIM_PrescalerConfig(TIM2, Prescaler,TIM_PSCReloadMode_Immediate);
}
//IC.h
#ifndef __IC_H__
#define __IC_H__
void IC_Init(void);
uint16_t IC_GetFreq(void);
#endif
//IC.c
#include "stm32f10x.h" // Device header
void IC_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_InternalClockConfig(TIM3);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 65536 - 1; //ARR
TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1; //PSC
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);
TIM_ICInitTypeDef TIM_ICInitStructure;
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICFilter = 0xF;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInit(TIM3,&TIM_ICInitStructure);
TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);
TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);
TIM_Cmd(TIM3,ENABLE);
}
uint16_t IC_GetFreq(void)
{
return 1000000 / (TIM_GetCapture1(TIM3) + 1);
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "PWM.h"
#include "IC.h"
int main(void)
{
OLED_Init();
PWM_Init();
IC_Init();
OLED_ShowString(1,1,"Freq:00000Hz");
PWM_SetPrescaler(720 -1); //Freq = 72M / (PSC + 1) / 100
PWM_SetCompare1(50); //Duty = CCR / 100
while(1)
{
OLED_ShowNum(1,6,IC_GetFreq(),5);
}
}
5.7 PWMI模式测频率占空比
本小节在 5.6 的基础上修改 IC 代码，除此外无变动。
实现：测占空比，与频率一起在OLED上刷新显示。
//IC.h
#ifndef __IC_H__
#define __IC_H__
void IC_Init(void);
uint16_t IC_GetFreq(void);
uint16_t IC_GetDuty(void);
#endif
//IC.c
#include "stm32f10x.h" // Device header
void IC_Init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_InternalClockConfig(TIM3);
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = 65536 - 1; //ARR
TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1; //PSC
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);
TIM_ICInitTypeDef TIM_ICInitStructure;
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICFilter = 0xF;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_PWMIConfig(TIM3,&TIM_ICInitStructure);
TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);
TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);
TIM_Cmd(TIM3,ENABLE);
}
//获取频率
uint16_t IC_GetFreq(void)
{
return 1000000 / (TIM_GetCapture1(TIM3) + 1);
}
//获取占空比
uint16_t IC_GetDuty(void)
{
return (TIM_GetCapture2(TIM3) + 1) * 100 / (TIM_GetCapture1(TIM3) + 1);
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "PWM.h"
#include "IC.h"
int main(void)
{
OLED_Init();
PWM_Init();
IC_Init();
OLED_ShowString(1,1,"Freq:00000Hz");
OLED_ShowString(2,1,"Duty:00%");
PWM_SetPrescaler(720 -1); //Freq = 72M / (PSC + 1) / 100
PWM_SetCompare1(50); //Duty = CCR / 100
while(1)
{
OLED_ShowNum(1,6,IC_GetFreq(),5);
OLED_ShowNum(2,6,IC_GetDuty(),2);
}
}
5.8 编码器接口测速
延用 5.1 的代码 ，新增 Encoder 的模块化代码文件。
实现：使用旋转编码器，对旋转速度进行测速。向左旋转为负，反之为正。（其实就是 4.2 的计次，但是添加了清零，每次计次完成都清零，这样就是速度了。）每次在OLED上刷新显示速度，使用main的中断函数而不是Delay。
引脚： 旋转编码器的A -> PA6，B -> PA7。
//Encoder.h
#ifndef __ENCODER_H__
#define __ENCODER_H__
void Encoder_Init(void);
int16_t Encoder_Get(void);
#endif
//Encoder.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"
#include "Encoder.h"
int16_t Speed;
int main(void)
{
OLED_Init();
Timer_Init();
Encoder_Init();
OLED_ShowString(1,1,"Speed:");
while(1)
{
OLED_ShowSignedNum(1, 7, Speed, 5);
}
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
{
Speed = Encoder_Get();
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Timer.h"
#include "Encoder.h"
int16_t Speed;
int main(void)
{
OLED_Init();
Timer_Init();
Encoder_Init();
OLED_ShowString(1,1,"Speed:");
while(1)
{
OLED_ShowSignedNum(1, 7, Speed, 5);
}
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update) == SET)
{
Speed = Encoder_Get();
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
六、ADC数模转换器
6.1 AD单通道
延用 3.1 的代码，新增 AD 模块。
实现：AD模数转换。使用电位器，向左拧电压减小，向右宁电压增大。
引脚：电位器三个引脚在上呈三角排列。左边引脚接电源负，右边引脚接电源正，中间引脚接PA0。
//AD.h
#ifndef __AD_H__
#define __AD_H__
void AD_Init(void);
uint16_t AD_GetValue(void);
#endif
//AD.c
#include "stm32f10x.h" // Device header
void AD_Init(void)
{
//配置时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
//配置GPIO口
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//选择输入通道
ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);
//ADC初始化（单次转换、非扫描模式）
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1,&ADC_InitStructure);
//开启电源
ADC_Cmd(ADC1,ENABLE);
//ADC校准
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1) == SET);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) == SET);
}
uint16_t AD_GetValue(void)
{
ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动
while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET); //等待
return ADC_GetConversionValue(ADC1); //读取
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "AD.h"
uint16_t ADValue;
float Voltage;
int main(void)
{
OLED_Init();
AD_Init();
OLED_ShowString(1,1,"ADValue:");
OLED_ShowString(2,1,"Voltage:0.00V");
while(1)
{
ADValue = AD_GetValue();
Voltage = (float)ADValue / 4095 * 3.3;
OLED_ShowNum(1, 9, ADValue, 4);
OLED_ShowNum(2, 9, Voltage, 1);
OLED_ShowNum(2, 11, (uint16_t)(Voltage * 100) % 100, 2);
Delay_ms(100);
}
}
6.2 AD多通道
实物图：
复制 6.1 文件，电位器不变，新增光敏传感器、热敏传感器、对射式红外传感器。修改AD模块与main函数。
引脚：光敏传感器、热敏传感器、对射式红外传感器的AO引脚分别接PA1、PA2、PA3。VCC都接电源正，GND都接电源负。
//AD.h
#ifndef __AD_H__
#define __AD_H__
void AD_Init(void);
uint16_t AD_GetValue(uint8_t ADC_Channel);
#endif
//AD.c
#include "stm32f10x.h" // Device header
void AD_Init(void)
{
//配置时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
//配置GPIO口
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//ADC初始化（单次转换、非扫描模式）
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1,&ADC_InitStructure);
//开启电源
ADC_Cmd(ADC1,ENABLE);
//ADC校准
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1) == SET);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) == SET);
}
uint16_t AD_GetValue(uint8_t ADC_Channel)
{
//选择输入通道
ADC_RegularChannelConfig(ADC1,ADC_Channel,1,ADC_SampleTime_55Cycles5);
ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动
while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET); //等待
return ADC_GetConversionValue(ADC1); //读取
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "AD.h"
uint16_t AD0, AD1, AD2, AD3;
int main(void)
{
OLED_Init();
AD_Init();
OLED_ShowString(1,1,"AD0:");
OLED_ShowString(2,1,"AD1:");
OLED_ShowString(3,1,"AD2:");
OLED_ShowString(4,1,"AD3:");
while(1)
{
AD0 = AD_GetValue(ADC_Channel_0);
AD1 = AD_GetValue(ADC_Channel_1);
AD2 = AD_GetValue(ADC_Channel_2);
AD3 = AD_GetValue(ADC_Channel_3);
OLED_ShowNum(1, 5, AD0, 4);
OLED_ShowNum(2, 5, AD1, 4);
OLED_ShowNum(3, 5, AD2, 4);
OLED_ShowNum(4, 5, AD3, 4);
Delay_ms(100);
}
}
七、DMA数据转运
7.1 DMA数据转运 单通道
复制 3.1 代码，新建 MyDMA 至System文件夹。
和 6.1 的接线相同。
实现：DataA每隔一秒向DataB传送数据，并在OLED更新显示。
//MyDMA.h
#ifndef __MYDMA_H__
#define __MYDMA_H__
void MyDMA_Init(uint32_t AddrA, uint32_t AddrB, uint16_t Size);
void MyDMA_Transfer(void);
#endif
//MyDMA.c
#include "stm32f10x.h" // Device header
uint16_t MyDMA_Size;
void MyDMA_Init(uint32_t AddrA, uint32_t AddrB, uint16_t Size)
{
MyDMA_Size = Size;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_PeripheralBaseAddr = AddrA;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
DMA_InitStructure.DMA_MemoryBaseAddr = AddrB;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = Size;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1,DISABLE);
}
void MyDMA_Transfer(void)
{
DMA_Cmd(DMA1_Channel1,DISABLE);
DMA_SetCurrDataCounter(DMA1_Channel1,MyDMA_Size);
DMA_Cmd(DMA1_Channel1,ENABLE);
while(DMA_GetFlagStatus(DMA1_FLAG_TC1) == RESET);
DMA_ClearFlag(DMA1_FLAG_TC1);
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "MyDMA.h"
uint8_t DataA[] = {0x01, 0x02, 0x03, 0x04};
uint8_t DataB[] = {0, 0, 0, 0};
int main(void)
{
OLED_Init();
MyDMA_Init((uint32_t)DataA,(uint32_t)DataB,4);
OLED_ShowString(1,1,"DataA");
OLED_ShowString(3,1,"DataB");
OLED_ShowHexNum(1,8,(uint32_t)DataA,8);
OLED_ShowHexNum(3,8,(uint32_t)DataB,8);
OLED_ShowHexNum(2,1,DataA[0],2);
OLED_ShowHexNum(2,4,DataA[1],2);
OLED_ShowHexNum(2,7,DataA[2],2);
OLED_ShowHexNum(2,10,DataA[3],2);
OLED_ShowHexNum(4,1,DataB[0],2);
OLED_ShowHexNum(4,4,DataB[1],2);
OLED_ShowHexNum(4,7,DataB[2],2);
OLED_ShowHexNum(4,10,DataB[3],2);
while(1)
{
DataA[0] ++;
DataA[1] ++;
DataA[2] ++;
DataA[3] ++;
OLED_ShowHexNum(2,1,DataA[0],2);
OLED_ShowHexNum(2,4,DataA[1],2);
OLED_ShowHexNum(2,7,DataA[2],2);
OLED_ShowHexNum(2,10,DataA[3],2);
OLED_ShowHexNum(4,1,DataB[0],2);
OLED_ShowHexNum(4,4,DataB[1],2);
OLED_ShowHexNum(4,7,DataB[2],2);
OLED_ShowHexNum(4,10,DataB[3],2);
Delay_ms(1000);
MyDMA_Transfer();
OLED_ShowHexNum(2,1,DataA[0],2);
OLED_ShowHexNum(2,4,DataA[1],2);
OLED_ShowHexNum(2,7,DataA[2],2);
OLED_ShowHexNum(2,10,DataA[3],2);
OLED_ShowHexNum(4,1,DataB[0],2);
OLED_ShowHexNum(4,4,DataB[1],2);
OLED_ShowHexNum(4,7,DataB[2],2);
OLED_ShowHexNum(4,10,DataB[3],2);
Delay_ms(1000);
}
}
7.2 DMA+AD多通道
复制 6.2 代码。
与 6.2 实现结果相同，但使用了DMA数据转运。
//AD.h
#ifndef __AD_H__
#define __AD_H__
extern uint16_t AD_Value[4];
void AD_Init(void);
#endif
//AD.c
#include "stm32f10x.h" // Device header
uint16_t AD_Value[4];
void AD_Init(void)
{
//配置时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
//配置GPIO口
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_1,2,ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_2,3,ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_3,4,ADC_SampleTime_55Cycles5);
//ADC初始化（单次转换、非扫描模式）
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_NbrOfChannel = 4;
ADC_Init(ADC1,&ADC_InitStructure);
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)AD_Value;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 4;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1,ENABLE);
ADC_DMACmd(ADC1,ENABLE);
ADC_Cmd(ADC1,ENABLE);
//ADC校准
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1) == SET);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) == SET);
ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "AD.h"
int main(void)
{
OLED_Init();
AD_Init();
OLED_ShowString(1,1,"AD0:");
OLED_ShowString(2,1,"AD1:");
OLED_ShowString(3,1,"AD2:");
OLED_ShowString(4,1,"AD3:");
while(1)
{
OLED_ShowNum(1, 5, AD_Value[0], 4);
OLED_ShowNum(2, 5, AD_Value[1], 4);
OLED_ShowNum(3, 5, AD_Value[2], 4);
OLED_ShowNum(4, 5, AD_Value[3], 4);
Delay_ms(100);
}
}
八、USART串口协议
8.1 串口发送
复制 3.1 代码，加上Serial文件。
实现：串口发送数据。 每复位一次，串口发送一次数据。
接线：STLink和USB转TTL同时插在电脑USB上 。
USB转TTL：TX -> PA10, RX -> PA9。STLink接线同上。
在串口助手中的最终显示结果如下：
//Serial.h
#ifndef __SERIAL_H__
#define __SERIAL_H__
#include <stdio.h>
void Serial_Init(void);
void Serial_SendByte(uint8_t Byte);
void Serial_SendArray(uint8_t *Array,uint16_t Length);
void Serial_SendString(char *String);
void Serial_SendNumber(uint32_t Number,uint8_t Length);
void Serial_Printf(char *format,...);
#endif
//Serial.c
#include "stm32f10x.h" // Device header
#include <stdio.h>
#include <stdarg.h>
void Serial_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void Serial_SendByte(uint8_t Byte)
{
USART_SendData(USART1,Byte);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
}
void Serial_SendArray(uint8_t *Array,uint16_t Length)
{
uint16_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Array[i]);
}
}
void Serial_SendString(char *String)
{
uint8_t i;
for(i = 0;String[i] != '\0'; i ++)
{
Serial_SendByte(String[i]);
}
}
uint32_t Serial_Pow(uint32_t X,uint32_t Y)
{
uint32_t Result = 1;
while(Y --)
{
Result *= X;
}
return Result;
}
void Serial_SendNumber(uint32_t Number,uint8_t Length)
{
uint8_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
}
}
int fputc(int ch,FILE *f)
{
Serial_SendByte(ch);
return ch;
}
//可变参数
void Serial_Printf(char *format,...)
{
char String[100];
va_list arg;
va_start(arg, format);
vsprintf(String, format, arg);
va_end(arg);
Serial_SendString(String);
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Serial.h"
int main(void)
{
OLED_Init();
Serial_Init();
Serial_SendByte(0x41);
uint8_t MyArray[] = {0x42, 0x43, 0x44, 0x45};
Serial_SendArray(MyArray,4);
Serial_SendString("\r\nNum1=");
Serial_SendNumber(111,3);
printf("\r\nNum2=%d",222);
char String[100];
sprintf(String,"\r\nNum3=%d",333);
Serial_SendString(String);
Serial_Printf("\r\nNum4=%d",444);
Serial_Printf("\r\n");
while(1)
{
}
}
8.2 串口发送+接收
复制 8.1 串口发送代码，接线相同不更改。
实现：中断接收。在串口助手发送数据，成功接收，并在OLED上也显示。目前只支持一个字节的接收。
//Serial.h
#ifndef __SERIAL_H__
#define __SERIAL_H__
#include <stdio.h>
void Serial_Init(void);
void Serial_SendByte(uint8_t Byte);
void Serial_SendArray(uint8_t *Array,uint16_t Length);
void Serial_SendString(char *String);
void Serial_SendNumber(uint32_t Number,uint8_t Length);
void Serial_Printf(char *format,...);
uint8_t Serial_GetRxFlag(void);
uint8_t Serial_GetRxData(void);
#endif
//Serial.c
#include "stm32f10x.h" // Device header
#include <stdio.h>
#include <stdarg.h>
uint8_t Serial_RxData;
uint8_t Serial_RxFlag;
void Serial_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void Serial_SendByte(uint8_t Byte)
{
USART_SendData(USART1,Byte);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
}
void Serial_SendArray(uint8_t *Array,uint16_t Length)
{
uint16_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Array[i]);
}
}
void Serial_SendString(char *String)
{
uint8_t i;
for(i = 0;String[i] != '\0'; i ++)
{
Serial_SendByte(String[i]);
}
}
uint32_t Serial_Pow(uint32_t X,uint32_t Y)
{
uint32_t Result = 1;
while(Y --)
{
Result *= X;
}
return Result;
}
void Serial_SendNumber(uint32_t Number,uint8_t Length)
{
uint8_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
}
}
int fputc(int ch,FILE *f)
{
Serial_SendByte(ch);
return ch;
}
//可变参数
void Serial_Printf(char *format,...)
{
char String[100];
va_list arg;
va_start(arg, format);
vsprintf(String, format, arg);
va_end(arg);
Serial_SendString(String);
}
uint8_t Serial_GetRxFlag(void)
{
if(Serial_RxFlag == 1)
{
Serial_RxFlag = 0;
return 1;
}
return 0;
}
uint8_t Serial_GetRxData(void)
{
return Serial_RxData;
}
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
{
Serial_RxData = USART_ReceiveData(USART1);
Serial_RxFlag = 1;
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Serial.h"
uint8_t RxData;
int main(void)
{
OLED_Init();
OLED_ShowString(1, 1, "RxData:");
Serial_Init();
while(1)
{
if(Serial_GetRxFlag() == 1)
{
RxData = Serial_GetRxData();
Serial_SendByte(RxData);
OLED_ShowHexNum(1, 8, RxData, 2);
}
}
}
8.3 串口收发HEX数据包
复制 8.2 的代码。
接线：STLink和USB转TTL照常接。PB1接按键。LED长脚接电源正，短脚接PA1。
实现：串口收发Hex数据包。按下按键发送，串口接受区显示接收的数据包TxPacket。串口助手发送数据包，会在OLED上显示接收的数据包RxPacket。
//Serial.h
#ifndef __SERIAL_H__
#define __SERIAL_H__
#include <stdio.h>
extern uint8_t Serial_TxPacket[];
extern uint8_t Serial_RxPacket[];
void Serial_Init(void);
void Serial_SendByte(uint8_t Byte);
void Serial_SendArray(uint8_t *Array,uint16_t Length);
void Serial_SendString(char *String);
void Serial_SendNumber(uint32_t Number,uint8_t Length);
void Serial_Printf(char *format,...);
void Serial_SendPacket(void);
uint8_t Serial_GetRxFlag(void);
#endif
//Serial.c
#include "stm32f10x.h" // Device header
#include <stdio.h>
#include <stdarg.h>
uint8_t Serial_TxPacket[4];
uint8_t Serial_RxPacket[4];
uint8_t Serial_RxFlag;
void Serial_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void Serial_SendByte(uint8_t Byte)
{
USART_SendData(USART1,Byte);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
}
void Serial_SendArray(uint8_t *Array,uint16_t Length)
{
uint16_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Array[i]);
}
}
void Serial_SendString(char *String)
{
uint8_t i;
for(i = 0;String[i] != '\0'; i ++)
{
Serial_SendByte(String[i]);
}
}
uint32_t Serial_Pow(uint32_t X,uint32_t Y)
{
uint32_t Result = 1;
while(Y --)
{
Result *= X;
}
return Result;
}
void Serial_SendNumber(uint32_t Number,uint8_t Length)
{
uint8_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
}
}
int fputc(int ch,FILE *f)
{
Serial_SendByte(ch);
return ch;
}
//可变参数
void Serial_Printf(char *format,...)
{
char String[100];
va_list arg;
va_start(arg, format);
vsprintf(String, format, arg);
va_end(arg);
Serial_SendString(String);
}
void Serial_SendPacket(void)
{
Serial_SendByte(0xFF);
Serial_SendArray(Serial_TxPacket,4);
Serial_SendByte(0xFE);
}
uint8_t Serial_GetRxFlag(void)
{
if(Serial_RxFlag == 1)
{
Serial_RxFlag = 0;
return 1;
}
return 0;
}
void USART1_IRQHandler(void)
{
static uint8_t RxState = 0;
static uint8_t pRxPacket = 0;
if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
{
uint8_t RxData = USART_ReceiveData(USART1);
if(RxState == 0)
{
if(RxData == 0xFF)
{
RxState = 1;
pRxPacket = 0;
}
}
else if(RxState == 1)
{
Serial_RxPacket[pRxPacket] = RxData;
pRxPacket ++;
if(pRxPacket >= 4)
{
RxState =2;
}
}
else if(RxState == 2)
{
if(RxData == 0xFE)
{
RxState = 0;
Serial_RxFlag = 1;
}
}
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Serial.h"
#include "Key.h"
uint8_t KeyNum;
int main(void)
{
OLED_Init();
Key_Init();
Serial_Init();
OLED_ShowString(1, 1, "TxPacket");
OLED_ShowString(3, 1, "RxPacket");
Serial_TxPacket[0] = 0x01;
Serial_TxPacket[1] = 0x02;
Serial_TxPacket[2] = 0x03;
Serial_TxPacket[3] = 0x04;
while(1)
{
KeyNum = Key_GetNum();
if(KeyNum == 1)
{
Serial_TxPacket[0] ++;
Serial_TxPacket[1] ++;
Serial_TxPacket[2] ++;
Serial_TxPacket[3] ++;
Serial_SendPacket();
OLED_ShowHexNum(2, 1, Serial_TxPacket[0], 2);
OLED_ShowHexNum(2, 4, Serial_TxPacket[1], 2);
OLED_ShowHexNum(2, 7, Serial_TxPacket[2], 2);
OLED_ShowHexNum(2, 10, Serial_TxPacket[3], 2);
}
if(Serial_GetRxFlag() == 1)
{
OLED_ShowHexNum(4, 1, Serial_RxPacket[0], 2);
OLED_ShowHexNum(4, 4, Serial_RxPacket[1], 2);
OLED_ShowHexNum(4, 7, Serial_RxPacket[2], 2);
OLED_ShowHexNum(4, 10, Serial_RxPacket[3], 2);
}
}
}
8.4 串口收发文本数据包
复制 8.3 代码。
实现：串口收发文本数据包。在串口助手发送“@LED_ON（回车）”，LED亮，STM32发送“LED_ON_OK\r\n”。发送“@LED_OFF（回车）”，LED灭，STM32发送“LED_OFF_OK\r\n”。发送其他则显示ERROR_COMMAND
//Serial.h
#ifndef __SERIAL_H__
#define __SERIAL_H__
#include <stdio.h>
extern char Serial_RxPacket[];
extern uint8_t Serial_RxFlag;
void Serial_Init(void);
void Serial_SendByte(uint8_t Byte);
void Serial_SendArray(uint8_t *Array,uint16_t Length);
void Serial_SendString(char *String);
void Serial_SendNumber(uint32_t Number,uint8_t Length);
void Serial_Printf(char *format,...);
#endif
//Serial.c
#include "stm32f10x.h" // Device header
#include <stdio.h>
#include <stdarg.h>
char Serial_RxPacket[100];
uint8_t Serial_RxFlag;
void Serial_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void Serial_SendByte(uint8_t Byte)
{
USART_SendData(USART1,Byte);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
}
void Serial_SendArray(uint8_t *Array,uint16_t Length)
{
uint16_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Array[i]);
}
}
void Serial_SendString(char *String)
{
uint8_t i;
for(i = 0;String[i] != '\0'; i ++)
{
Serial_SendByte(String[i]);
}
}
uint32_t Serial_Pow(uint32_t X,uint32_t Y)
{
uint32_t Result = 1;
while(Y --)
{
Result *= X;
}
return Result;
}
void Serial_SendNumber(uint32_t Number,uint8_t Length)
{
uint8_t i;
for(i = 0;i < Length; i ++)
{
Serial_SendByte(Number / Serial_Pow(10,Length - i - 1) % 10 + '0');
}
}
int fputc(int ch,FILE *f)
{
Serial_SendByte(ch);
return ch;
}
//可变参数
void Serial_Printf(char *format,...)
{
char String[100];
va_list arg;
va_start(arg, format);
vsprintf(String, format, arg);
va_end(arg);
Serial_SendString(String);
}
void USART1_IRQHandler(void)
{
static uint8_t RxState = 0;
static uint8_t pRxPacket = 0;
if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
{
uint8_t RxData = USART_ReceiveData(USART1);
if(RxState == 0)
{
if(RxData == '@' && Serial_RxFlag == 0)
{
RxState = 1;
pRxPacket = 0;
}
}
else if(RxState == 1)
{
if(RxData == '\r')
{
RxState =2;
}
else
{
Serial_RxPacket[pRxPacket] = RxData;
pRxPacket ++;
}
}
else if(RxState == 2)
{
if(RxData == '\n')
{
RxState = 0;
Serial_RxPacket[pRxPacket] = '\0';
Serial_RxFlag = 1;
}
}
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
}
//main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Serial.h"
#include "LED.h"
#include <string.h>
int main(void)
{
OLED_Init();
LED_Init();
Serial_Init();
OLED_ShowString(1, 1, "TxPacket");
OLED_ShowString(3, 1, "RxPacket");
while(1)
{
if(Serial_RxFlag == 1)
{
OLED_ShowString(4, 1, " ");
OLED_ShowString(4, 1, Serial_RxPacket);
if(strcmp(Serial_RxPacket,"LED_ON") == 0)
{
LED1_ON();
Serial_SendString("LED_ON_OK\r\n");
OLED_ShowString(2, 1, " ");
OLED_ShowString(2, 1, "LED_ON_OK");
}
else if(strcmp(Serial_RxPacket,"LED_OFF") == 0)
{
LED1_OFF();
Serial_SendString("LED_OFF_OK\r\n");
OLED_ShowString(2, 1, " ");
OLED_ShowString(2, 1, "LED_OFF_OK");
}
else{
Serial_SendString("ERROR_COMMAND\r\n");
OLED_ShowString(2, 1, " ");
OLED_ShowString(2, 1, "ERROR_COMMAND");
}
Serial_RxFlag = 0;
}
}
}