基于STM32F4xx单片机的GPIO口宏定义、总线输入/输出函数及定时器精确延时函数

基于STM32F4xx单片机的GPIO口宏定义、总线输入/输出函数及定时器精确延时函数
资源：
download.csdn.net/download/weixin_53403301/66916208

总线输入/输出函数直接上代码：

# include "stm32f4xx.h"
# include "GPIO.h"

void PA_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PA_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PA_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PA_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PB_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PB_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PB_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PB_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PC_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PC_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PC_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PC_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PD_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PD_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PD_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PD_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PE_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PE_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PE_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PE_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PF_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PF_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PF_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PF_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PG_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PG_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PG_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PG_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PH_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PH_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PH_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PH_I(i)<<i)&0xFFFF;
	}
	return num;
}

void PI_BUS_O(unsigned int num)  //输入值num最大为0xFFFF
{
	int i;
	for(i=0;i<16;i++)
	{
		PI_O(i)=(num>>i)&0x0001;
	}
}
unsigned int PI_BUS_I(void)  //输出值num最大为0xFFFF
{
	unsigned int num;
	int i;
	for(i=0;i<16;i++)
	{
		num=num+(PI_I(i)<<i)&0xFFFF;
	}
	return num;
}

头文件：

#ifndef __GPIO_BUS_H__
#define __GPIO_BUS_H__

void PA_BUS_O(unsigned int num);
unsigned int PA_BUS_I(void);

void PB_BUS_O(unsigned int num);
unsigned int PB_BUS_I(void);

void PC_BUS_O(unsigned int num);
unsigned int PC_BUS_I(void);

void PD_BUS_O(unsigned int num);
unsigned int PD_BUS_I(void);

void PE_BUS_O(unsigned int num);
unsigned int PE_BUS_I(void);

void PF_BUS_O(unsigned int num);
unsigned int PF_BUS_I(void);

void PG_BUS_O(unsigned int num);
unsigned int PG_BUS_I(void);

void PH_BUS_O(unsigned int num);
unsigned int PH_BUS_I(void);

void PI_BUS_O(unsigned int num);
unsigned int PI_BUS_I(void);

#endif

GPIO口宏定义头文件：

#ifndef __GPIO_H__
#define __GPIO_H__

#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2)) 
#define MEM_ADDR(addr)  *((volatile unsigned long  *)(addr)) 
#define BIT_ADDR(addr, bitnum)   MEM_ADDR(BITBAND(addr, bitnum)) 

#define GPIOA_ODR_Addr    (GPIOA_BASE+20) //0x40020014
#define GPIOB_ODR_Addr    (GPIOB_BASE+20) //0x40020414 
#define GPIOC_ODR_Addr    (GPIOC_BASE+20) //0x40020814 
#define GPIOD_ODR_Addr    (GPIOD_BASE+20) //0x40020C14 
#define GPIOE_ODR_Addr    (GPIOE_BASE+20) //0x40021014 
#define GPIOF_ODR_Addr    (GPIOF_BASE+20) //0x40021414    
#define GPIOG_ODR_Addr    (GPIOG_BASE+20) //0x40021814   
#define GPIOH_ODR_Addr    (GPIOH_BASE+20) //0x40021C14    
#define GPIOI_ODR_Addr    (GPIOI_BASE+20) //0x40022014     

#define GPIOA_IDR_Addr    (GPIOA_BASE+16) //0x40020010 
#define GPIOB_IDR_Addr    (GPIOB_BASE+16) //0x40020410 
#define GPIOC_IDR_Addr    (GPIOC_BASE+16) //0x40020810 
#define GPIOD_IDR_Addr    (GPIOD_BASE+16) //0x40020C10 
#define GPIOE_IDR_Addr    (GPIOE_BASE+16) //0x40021010 
#define GPIOF_IDR_Addr    (GPIOF_BASE+16) //0x40021410 
#define GPIOG_IDR_Addr    (GPIOG_BASE+16) //0x40021810 
#define GPIOH_IDR_Addr    (GPIOH_BASE+16) //0x40021C10 
#define GPIOI_IDR_Addr    (GPIOI_BASE+16) //0x40022010 
 
#define PA_O(n)   	BIT_ADDR(GPIOA_ODR_Addr,n)  //输出 
#define PA_I(n)    	BIT_ADDR(GPIOA_IDR_Addr,n)  //输入 

#define PB_O(n)   	BIT_ADDR(GPIOB_ODR_Addr,n)  //输出 
#define PB_I(n)    	BIT_ADDR(GPIOB_IDR_Addr,n)  //输入 

#define PC_O(n)   	BIT_ADDR(GPIOC_ODR_Addr,n)  //输出 
#define PC_I(n)    	BIT_ADDR(GPIOC_IDR_Addr,n)  //输入 

#define PD_O(n)   	BIT_ADDR(GPIOD_ODR_Addr,n)  //输出 
#define PD_I(n)    	BIT_ADDR(GPIOD_IDR_Addr,n)  //输入 

#define PE_O(n)   	BIT_ADDR(GPIOE_ODR_Addr,n)  //输出 
#define PE_I(n)    	BIT_ADDR(GPIOE_IDR_Addr,n)  //输入

#define PF_O(n)   	BIT_ADDR(GPIOF_ODR_Addr,n)  //输出 
#define PF_I(n)    	BIT_ADDR(GPIOF_IDR_Addr,n)  //输入

#define PG_O(n)   	BIT_ADDR(GPIOG_ODR_Addr,n)  //输出 
#define PG_I(n)    	BIT_ADDR(GPIOG_IDR_Addr,n)  //输入

#define PH_O(n)   	BIT_ADDR(GPIOH_ODR_Addr,n)  //输出 
#define PH_I(n)    	BIT_ADDR(GPIOH_IDR_Addr,n)  //输入

#define PI_O(n)  	 	BIT_ADDR(GPIOI_ODR_Addr,n)  //输出 
#define PI_I(n)   	BIT_ADDR(GPIOI_IDR_Addr,n)  //输入

#endif

定时器精准延时函数：

# include "stm32f4xx.h"

void delay_ms(unsigned int ms)
{
	while(ms--)
	{
		SysTick->CTRL = 0; // Disable SysTick  关闭系统定时器
		SysTick->LOAD = 168000000/1000-1; // Count from 255 to 0 (256 cycles)  载入计数值 定时器从这个值开始计数
		SysTick->VAL = 0; // Clear current value as well as count flag  清空计数值到达0后的标记
		SysTick->CTRL = 5; // Enable SysTick timer with processor clock  使能168MHz的系统定时器
		while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set  等待
	}
	SysTick->CTRL = 0; // Disable SysTick  关闭系统定时器
}
void delay_us(unsigned int us)
{
	while(us--)
	{
		SysTick->CTRL = 0; // Disable SysTick  关闭系统定时器
		SysTick->LOAD = 168000000/1000/1000-1; // Count from 255 to 0 (256 cycles)  载入计数值 定时器从这个值开始计数
		SysTick->VAL = 0; // Clear current value as well as count flag  清空计数值到达0后的标记
		SysTick->CTRL = 5; // Enable SysTick timer with processor clock  使能168MHz的系统定时器
		while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set  等待
	}
	SysTick->CTRL = 0; // Disable SysTick  关闭系统定时器
}

头文件：

#ifndef __DELAY_H__
#define __DELAY_H__

void delay_ms(unsigned int ms);
void delay_us(unsigned int us);

#endif