Linux之ARM(MX6U)裸机篇----7.蜂鸣器实验

一，蜂鸣器模块

封装步骤：
①初始化SNVS_TAMPER这IO复用为GPIO

②设置SNVS_TAMPPER这个IO的电气属性

③初始化GPIO

④控制GPIO输出高低电平

bsp_beep.c:
#include "bsp_beep.h"
#include "cc.h"

/* BEEP初始化 */
void beep_init(void)
{
    IOMUXC_SetPinMux(IOMUXC_SNVS_SNVS_TAMPER1_GPIO5_IO01,0);/* 复用为GPIO01-03 */
    IOMUXC_SetPinConfig(IOMUXC_SNVS_SNVS_TAMPER1_GPIO5_IO01,0x10b0);

    /* GPIO初始化 */
    GPIO5->GDIR |= (1<<1);
    GPIO5->DR &= (1<<1);
}

/* 蜂鸣器控制函数 */
void beep_switch(int status)
{
    if(status == ON)
        GPIO5->DR |= (1<<1);
    else if(status ==OFF)
        GPIO5->DR &= (1<<1);
}



bsp_beep.h:
#ifndef __BSP_BEEP_H
#define __BSP_BEEP_H
#include "fsl_common.h"
#include "fsl_iomuxc.h"
#include "MCIMX6Y2.h"

void beep_init(void);
void beep_switch(int status);

#endif 

二，main文件

main.c:
#include "main.h"
#include "bsp_delay.h"
#include "bsp_led.h"
#include "bsp_clk.h"
#include "bsp_beep.h"

/*
 * @description	: mian函数
 * @param 		: 无
 * @return 		: 无
 */
int main(void)
{
	clk_enable();		/* 使能所有的时钟 */
	led_init();			/* 初始化led */

	while(1)			/* 死循环 */
	{	
		led_off();		/* 关闭LED */
		beep_switch(ON);
		delay(500);		/* 延时500ms */

		led_on();		/* 打开LED  */
		beep_switch(OFF);
		delay(500);		/* 延时500ms */
	}

	return 0;
}


main.h:
#ifndef __MAIN_H
#define __MAIN_H


#include "fsl_common.h"
#include "fsl_iomuxc.h"
#include "MCIMX6Y2.h"
#include "cc.h"


#endif

三，makefile文件

CROSS_COMPILE 	?= arm-linux-gnueabihf-
TARGET		  	?= beep

CC 				:= $(CROSS_COMPILE)gcc
LD				:= $(CROSS_COMPILE)ld
OBJCOPY 		:= $(CROSS_COMPILE)objcopy
OBJDUMP 		:= $(CROSS_COMPILE)objdump

#\表示此行没写完，下一行也是
INCDIRS 		:= imx6u \
				   bsp/clk \
				   bsp/led \
				   bsp/delay \
				   bsp/beep    #添加了这一步
				   			   
SRCDIRS			:= project \
				   bsp/clk \
				   bsp/led \
				   bsp/delay \
				   bsp/beep    #添加了这一步
				   
				   
INCLUDE			:= $(patsubst %, -I %, $(INCDIRS))

SFILES			:= $(foreach dir, $(SRCDIRS), $(wildcard $(dir)/*.S))
CFILES			:= $(foreach dir, $(SRCDIRS), $(wildcard $(dir)/*.c))

SFILENDIR		:= $(notdir  $(SFILES))
CFILENDIR		:= $(notdir  $(CFILES))

SOBJS			:= $(patsubst %, obj/%, $(SFILENDIR:.S=.o))
COBJS			:= $(patsubst %, obj/%, $(CFILENDIR:.c=.o))
OBJS			:= $(SOBJS) $(COBJS)

VPATH			:= $(SRCDIRS)

.PHONY: clean
	
$(TARGET).bin : $(OBJS)
	$(LD) -Timx6u.lds -o $(TARGET).elf $^
	$(OBJCOPY) -O binary -S $(TARGET).elf $@
	$(OBJDUMP) -D -m arm $(TARGET).elf > $(TARGET).dis

$(SOBJS) : obj/%.o : %.S
	$(CC) -Wall -nostdlib -c -O2  $(INCLUDE) -o $@ $<

$(COBJS) : obj/%.o : %.c
	$(CC) -Wall -nostdlib -c -O2  $(INCLUDE) -o $@ $<
	
clean:
	rm -rf $(TARGET).elf $(TARGET).dis $(TARGET).bin $(COBJS) $(SOBJS)

print:
	@echo INCLUDE = $(INCLUDE)
	@echo SFILES = $(SFILES)
	@echo CFILES = $(CFILES)
	@echo SFILENDIR = $(SFILENDIR)
	@echo CFILENDIR = $(CFILENDIR)
	@echo SOBJS = $(SOBJS)
	@echo COBJS = $(COBJS)
	@echo OBJS = $(OBJS)