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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 ?= beepCC := $(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)