QSPI驱动带NV3030B的LCD屏-EW帮帮网

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（说明：本文没有详细描写有关QSPI通信时的细节，只是作为一个简要记录，说明一下QSPI驱动屏幕时的一些要点）

1、引脚说明：

（1）LED_K：LCD屏背光负极

（2）LED_A：LCD屏背光正极

（该应用中，LED_A常供电3.3V，通过调节LED_K来控制背光的亮灭）

（3）LCD_CS：片选脚，低电平选中

（4）LCD_DA0：QSPI通信0脚

（5）LCD_DA1：QSPI通信1脚

（6）LCD_DA2：QSPI通信2脚

（7）LCD_DA3：QSPI通信3脚

（8）LCD_CLK：QSPI通信始终脚

（9）LCD_RST：复位脚

注：有些驱动IC还需要LCD_RS脚，用于控制当前发送的是命令还是数据，NV3030B不需要

2、空闲时各引脚电平说明：

LED_K：高或悬空，关闭背光；

LCD_CS：高，没有选中IC；

LCD_CLK：高，空闲电平默认为高，驱动IC-NV3030B在CLK上升沿采样数据；

LCD_RST：高，需要复位时下拉RST脚100ms，再拉高即可

LCD_DA0~LCD_DA3：高，QSPI通信时的数据引脚，半双工通信；发送命令阶段都是通过LCD_DA0单线进行的，只有在发送图片数据时才会使用到LCD_DA1~LCD_DA3

3、通信时序图：

（1）发送命令，以及给寄存器发送数据时只使用三根线CS，CLK，DA0，而DA1~DA3固定为高阻或高，RST为高，时序图如下（DA0在CLK下降沿切换数据，上升沿保持数据稳定）：

（2）发送图像数据时使用6根线CS，CLK，DA0，DA1，DA2，DA3，而RST固定为高，时序图如下（DA0~DA3在CLK下降沿切换数据，上升沿保持数据稳定）：

在传输数据高4位时，DA3~DA0分别表示Bit7~Bit4；

在传输数据低4位时，DA3~DA0分别表示Bit3~Bit0；

4、例程：

.h文件：

//------------------------------------------------------
#define RED 0xF800       //定义颜色常量
#define GREEN 0x07E0
#define BLUE 0x001F
#define WHITE 0xFFFF
#define BLACK 0x0000
#define GRAY 0xEF5D   //0x2410
#define GRAY75 0x39E7
#define GRAY50 0x7BEF
#define GRAY25 0xADB5
//------------------------------------------------------

#define QSPI_CS_PIN 34 //片选脚
#define QSPI_CLK_PIN 35 //时钟脚
#define QSPI_RS_PIN 38 //数据/命令脚
#define QSPI_DA0_PIN 40 //数据脚0
#define QSPI_DA1_PIN 41 //数据脚1
#define QSPI_DA2_PIN 11 //数据脚2
#define QSPI_DA3_PIN 12 //数据脚3
#define QSPI_BL_EN_PIN 33 //背光使能脚
#define QSPI_RST_PIN 37 //硬件复位脚
#define QSPI_PWR_EN_PIN 22 //LCD的VCC使能脚

#define QSPI_CS_Clr() nrf_gpio_pin_clear(QSPI_CS_PIN)//CS1
#define QSPI_CS_Set() nrf_gpio_pin_set(QSPI_CS_PIN)

#define QSPI_CLK_Clr() nrf_gpio_pin_clear(QSPI_CLK_PIN);
#define QSPI_CLK_Set() nrf_gpio_pin_set(QSPI_CLK_PIN)

#define QSPI_RS_Clr() nrf_gpio_pin_clear(QSPI_RS_PIN)//DC
#define QSPI_RS_Set() nrf_gpio_pin_set(QSPI_RS_PIN)

#define QSPI_DA0_Clr() nrf_gpio_pin_clear(QSPI_DA0_PIN)
#define QSPI_DA0_Set() nrf_gpio_pin_set(QSPI_DA0_PIN)
#define QSPI_DA1_Clr() nrf_gpio_pin_clear(QSPI_DA1_PIN)
#define QSPI_DA1_Set() nrf_gpio_pin_set(QSPI_DA1_PIN)
#define QSPI_DA2_Clr() nrf_gpio_pin_clear(QSPI_DA2_PIN)
#define QSPI_DA2_Set() nrf_gpio_pin_set(QSPI_DA2_PIN)
#define QSPI_DA3_Clr() nrf_gpio_pin_clear(QSPI_DA3_PIN)
#define QSPI_DA3_Set() nrf_gpio_pin_set(QSPI_DA3_PIN)

#define QSPI_BLK_Clr() nrf_gpio_pin_clear(QSPI_BL_EN_PIN)//BLK
#define QSPI_BLK_Set() nrf_gpio_pin_set(QSPI_BL_EN_PIN)

#define QSPI_RES_Clr() nrf_gpio_pin_clear(QSPI_RST_PIN)//RES
#define QSPI_RES_Set() nrf_gpio_pin_set(QSPI_RST_PIN)

#define QSPI_PWR_EN_Clr() nrf_gpio_pin_clear(QSPI_PWR_EN_PIN)//RES
#define QSPI_PWR_EN_Set() nrf_gpio_pin_set(QSPI_PWR_EN_PIN)

typedef enum{
SINGLE_LINE,
QUAD_LINE
}ENUM_QSPI_IO_NUM;

void Nv3030BInit(void);
void DispColor(unsigned int color);

.c文件：

void NV3030BGpioInit(void)
{
nrf_gpio_cfg_output(QSPI_CS_PIN);
nrf_gpio_cfg_output(QSPI_CLK_PIN);
nrf_gpio_cfg_output(QSPI_RS_PIN);
nrf_gpio_cfg_output(QSPI_DA0_PIN);
nrf_gpio_cfg_output(QSPI_DA1_PIN);
nrf_gpio_cfg_output(QSPI_DA2_PIN);
nrf_gpio_cfg_output(QSPI_DA3_PIN);
nrf_gpio_cfg_output(QSPI_BL_EN_PIN);
nrf_gpio_cfg_output(QSPI_RST_PIN);
nrf_gpio_cfg_output(QSPI_PWR_EN_PIN);

QSPI_CS_Set();
   QSPI_CLK_Set();
   QSPI_DA0_Set();
   QSPI_DA1_Set();
   QSPI_DA2_Set();
   QSPI_DA3_Set();
   QSPI_RES_Set();
QSPI_RS_Set();
    QSPI_BLK_Set();
    QSPI_PWR_EN_Set();
}

/*
**********************************************************************************
*Function: QspiSingleIOWrite
*Description: QSPI单线IO传输数据
*Calls:
*Called By:
*Input: dat：要传输的数据
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiSingleIOWriteData(uint8_t dat)
{
       uint8_t i;

//       QSPI_CS_Clr();
       for(i=0;i<8;i++){
               QSPI_CLK_Clr();
               if(dat&0x80)
               {
                   QSPI_DA0_Set();
               }
               else
               {
                   QSPI_DA0_Clr();
               }
               QSPI_CLK_Set();
               dat<<=1;
       }
//       QSPI_CS_Set();
}

/*
**********************************************************************************
*Function: Nv3030bQspiQuadIOWrite
*Description: QSPI四线IO传输数据
*Calls:
*Called By:
*Input: dat：要传输的数据
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiQuadIOWriteData(uint8_t dat)
{
       uint8_t i;

//       QSPI_CS_Clr();
       for(i=0;i<2;i++){
               QSPI_CLK_Clr();
               if(dat&0x80)
               {
                   QSPI_DA3_Set();
               }
               else
               {
                   QSPI_DA3_Clr();
               }
               dat<<=1;

               if(dat&0x80)
               {
                   QSPI_DA2_Set();
               }
               else
               {
                   QSPI_DA2_Clr();
               }
               dat<<=1;

               if(dat&0x80)
               {
                   QSPI_DA1_Set();
               }
               else
               {
                   QSPI_DA1_Clr();
               }
               dat<<=1;

               if(dat&0x80)
               {
                   QSPI_DA0_Set();
               }
               else
               {
                   QSPI_DA0_Clr();
               }
               QSPI_CLK_Set();
               dat<<=1;
       }
//       QSPI_CS_Set();
}

/*
**********************************************************************************
*Function: QspiSingleIOWrData8
*Description: QSPI单线IO传输1字节数据
*Calls:
*Called By:
*Input: dat：要传输的数据
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiSingleIOWrData8(uint8_t dat)
{
QspiSingleIOWriteData(dat);
}

/*
**********************************************************************************
*Function: QspiQuadIOWrData8
*Description: QSPI四线IO传输1字节数据
*Calls:
*Called By:
*Input: dat：要传输的数据
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiQuadIOWrData8(uint8_t dat)
{
QspiQuadIOWriteData(dat);
}

/*
**********************************************************************************
*Function: QspiWrData16
*Description: QSPI传输4字节数据
*Calls:
*Called By:
*Input: l_line:传输数据时使用的线数，
SINGLE_LINE：用单根IO传输
QUAD_LINE：用4根IO传输
dat：要传输的数据
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiWrData16(ENUM_QSPI_IO_NUM l_line, uint16_t dat)
{
if(SINGLE_LINE == l_line){
       QspiSingleIOWriteData(dat>>8);
       QspiSingleIOWriteData(dat);
       }
       else{
       QspiQuadIOWriteData(dat>>8);
       QspiQuadIOWriteData(dat);
       }
}

/*
**********************************************************************************
*Function: QspiWrComm
*Description: QSPI写寄存器
*Calls:
*Called By:
*Input: l_line:传输数据时使用的线数，
SINGLE_LINE：用单根IO传输
QUAD_LINE：用4根IO传输
dat：要传输的数据
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiWrComm(uint8_t dat)
{
//       QSPI_RS_Clr();//写命令
QspiSingleIOWriteData(0x02);
QspiSingleIOWriteData(0x00);
QspiSingleIOWriteData(dat);
QspiSingleIOWriteData(0x00);
//       QSPI_RS_Set();//写数据
}

/*
**********************************************************************************
*Function: Nv3030bQspiAddressSet
*Description: 设置起始和结束地址
*Calls:
*Called By:
*Input: x1,x2 设置列的起始和结束地址
y1,y2 设置行的起始和结束地址
*Output:
*Return:
*Others:
*********************************************************************************
*/
void QspiAddressSet(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2)
{
QSPI_CS_Clr();
QspiWrComm(0x2a);//列地址设置
   QspiWrData16(SINGLE_LINE,x1);
   QspiWrData16(SINGLE_LINE,x2);
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0x2b);//行地址设置
   QspiWrData16(SINGLE_LINE,y1);
   QspiWrData16(SINGLE_LINE,y2);
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0x2c);//储存器写
QSPI_CS_Set();
}

/*
**********************************************************************************
*Function: Nv3030BInit
*Description: Nv3030B初始化
*Calls:
*Called By:
*Input:
*Output:
*Return:
*Others:
*********************************************************************************
*/
void Nv3030BInit(void)
{
NV3030BGpioInit();

QSPI_CS_Clr();
QSPI_RES_Set();
nrf_delay_ms(10);
   QSPI_RES_Clr();
nrf_delay_ms(100);
QSPI_RES_Set();
nrf_delay_ms(100);

QspiWrComm(0xFD); //私有访问
QspiSingleIOWrData8(0x06); //进入私有寄存器模式
   QspiSingleIOWrData8(0x08);
QSPI_CS_Set();
nrf_delay_ms(1);

   //QspiWrComm(0x60); //时钟频率调整
   //QspiQuadIOWrData8(0x03);
   //QspiQuadIOWrData8(0x01);
   //QspiQuadIOWrData8(0x01);
QSPI_CS_Clr();
   QspiWrComm(0x61);//VDD设置
   QspiSingleIOWrData8(0x06); //唤醒时VDD1.68
   QspiSingleIOWrData8(0x04); //睡眠时VDD1.29
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x62);//
   QspiSingleIOWrData8(0x00);
   QspiSingleIOWrData8(0x44);
   QspiSingleIOWrData8(0x40);
//QspiQuadIOWrData8(0x03);
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0x63);//
   QspiSingleIOWrData8(0x41);
   QspiSingleIOWrData8(0x07);
   QspiSingleIOWrData8(0x12);
   QspiSingleIOWrData8(0x12);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x64);
QspiSingleIOWrData8(0x37);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x65);
   QspiSingleIOWrData8(0x09);
   QspiSingleIOWrData8(0x10);
   QspiSingleIOWrData8(0x21);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x66);
   QspiSingleIOWrData8(0x09);
   QspiSingleIOWrData8(0x10);
   QspiSingleIOWrData8(0x21);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x67);
QspiSingleIOWrData8(0x21);
QspiSingleIOWrData8(0x40);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x68);
   QspiSingleIOWrData8(0x5d);
   QspiSingleIOWrData8(0x4c);//
   QspiSingleIOWrData8(0x2c);//
   QspiSingleIOWrData8(0x1c);//
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xB1);
   QspiSingleIOWrData8(0x0f); //0c
   QspiSingleIOWrData8(0x02); //00
   QspiSingleIOWrData8(0x07); //01
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xB4);
QspiSingleIOWrData8(0x02);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xB5);
   QspiSingleIOWrData8(0x02);
   QspiSingleIOWrData8(0x02);//
   QspiSingleIOWrData8(0x0a);//
   QspiSingleIOWrData8(0x14);//
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xb6);
   QspiSingleIOWrData8(0x44);
   QspiSingleIOWrData8(0x01);
   QspiSingleIOWrData8(0x9f);
   QspiSingleIOWrData8(0x00);
   QspiSingleIOWrData8(0x02);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xdf);
QspiSingleIOWrData8(0x11);
QSPI_CS_Set();

///NV3030A2 GAMMA/
QSPI_CS_Clr();
   QspiWrComm(0xe0); //gmama set 2.2
   QspiSingleIOWrData8(0x01); //PKP0[4:0]
   QspiSingleIOWrData8(0x06); //PKP1[4:0]
   QspiSingleIOWrData8(0x0e); //PKP2[4:0]
   QspiSingleIOWrData8(0x10); //PKP3[4:0]
   QspiSingleIOWrData8(0x0e); //PKP4[4:0]
   QspiSingleIOWrData8(0x0c); //PKP5[4:0]
   QspiSingleIOWrData8(0x0a); //PKP6[4:0]
   QspiSingleIOWrData8(0x16); //PKP6[4:0]
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe3);
   QspiSingleIOWrData8(0x16); //PKN0[4:0]
   QspiSingleIOWrData8(0x13); //PKN1[4:0]
   QspiSingleIOWrData8(0x14); //PKN2[4:0]
   QspiSingleIOWrData8(0x10); //PKN3[4:0]
   QspiSingleIOWrData8(0x0f); //PKN4[4:0]
   QspiSingleIOWrData8(0x0f); //PKN5[4:0]
   QspiSingleIOWrData8(0x04); //PKN6[4:0]
   QspiSingleIOWrData8(0x01); //PKN6[4:0]
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe1);
   QspiSingleIOWrData8(0x14); //PRP0[6:0]
   QspiSingleIOWrData8(0x68); //PRP1[6:0]
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe4);
   QspiSingleIOWrData8(0x68); //PRN0[6:0]
   QspiSingleIOWrData8(0x14); //PRN1[6:0]
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe2);
   QspiSingleIOWrData8(0x00); //VRP0[5:0]
   QspiSingleIOWrData8(0x0a); //VRP1[5:0]
   QspiSingleIOWrData8(0x09); //VRP2[5:0]
   QspiSingleIOWrData8(0x30); //VRP3[5:0]
   QspiSingleIOWrData8(0x39); //VRP4[5:0]
   QspiSingleIOWrData8(0x3f); //VRP5[5:0]
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe5);
   QspiSingleIOWrData8(0x3f); //VRN0[5:0]
   QspiSingleIOWrData8(0x33); //VRN1[5:0]
   QspiSingleIOWrData8(0x28); //VRN2[5:0]
   QspiSingleIOWrData8(0x09); //VRN3[5:0]
   QspiSingleIOWrData8(0x0a); //VRN4[5:0]
   QspiSingleIOWrData8(0x00); //VRN5[5:0]
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe6);
   QspiSingleIOWrData8(0x00);
   QspiSingleIOWrData8(0xff);
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xe7);
   QspiSingleIOWrData8(0x01);
   QspiSingleIOWrData8(0x04);
   QspiSingleIOWrData8(0x03);
   QspiSingleIOWrData8(0x03);
   QspiSingleIOWrData8(0x00);
   QspiSingleIOWrData8(0x12);
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xE8);
   QspiSingleIOWrData8(0x00);
   QspiSingleIOWrData8(0x60);
   QspiSingleIOWrData8(0x00);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xec);
QspiSingleIOWrData8(0x62);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0xf1);
QspiSingleIOWrData8(0x00);
QSPI_CS_Set();

QSPI_CS_Clr();
   QspiWrComm(0xfd); //私有访问
   QspiSingleIOWrData8(0xfa); //退出私有访问
   QspiSingleIOWrData8(0xfc);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x3a);
QspiSingleIOWrData8(0x55);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x35);
QspiSingleIOWrData8(0x00);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x11); // exit sleep
nrf_delay_ms(200);
QSPI_CS_Set();

QSPI_CS_Clr();
QspiWrComm(0x29); // display on
nrf_delay_ms(10);
QSPI_CS_Set();
}

/*
**********************************************************************************
*Function: DispColor
*Description: 用统一颜色刷屏
*Calls:
*Called By:
*Input:
*Output:
*Return:
*Others:
*********************************************************************************
*/
void DispColor(unsigned int color)
{
unsigned int i,j;
QspiAddressSet(0,0,240,320);

QSPI_CS_Clr();
QspiSingleIOWriteData(0x12);
QspiQuadIOWriteData(0x00);
QspiQuadIOWriteData(0x2c);
QspiQuadIOWriteData(0x00);

for(i=0; i<320; i++)
   for(j=0; j<240; j++){
               QspiWrData16(QUAD_LINE,color);
               }
QSPI_CS_Set();
}

main函数：

int main(void)
{
Nv3030BInit();

while(true){
               DispColor(RED);
               DispColor(GREEN);
               DispColor(BLUE);
               DispColor(WHITE);
               DispColor(BLACK);
               DispColor(GRAY);
               nrf_delay_ms(2000);
       }
}

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