AVR读写IO口右一方法(借用ATmel)

//头文件

#ifndef __always_inline__

#define __always_inline__ _Pragma("inline=forced")inline

#endif

#define AVR_GPIO_ASSIGN(name, port, bit) \

__always_inline__ static
void GPIO_##name##_Set(void) {PORT##port |= (1 << bit);}\

__always_inline__ static
void GPIO_##name##_Clr(void) {PORT##port &= ~(1 << bit);}\

__always_inline__ static
void GPIO_##name##_Toggle(void) {PORT##port ^= (1 << bit);}\

__always_inline__ static uint8 GPIO_##name##_Read(void) {return (PIN##port & (1 << bit)) !=0;}\

__always_inline__ static uint8 GPIO_##name##_DdrRead(void) {return (DDR##port & (1 << bit)) !=0;}\

__always_inline__ static
void GPIO_##name##_MakeOut(uint8 x) {(x)?(PORT##port |= (1 << bit)):(PORT##port &= ~(1 << bit)); DDR##port |= (1 << bit);}\

__always_inline__ static
void GPIO_##name##_MakeIn(uint8 x) {DDR##port &= ~(1 << bit); (x)?(PORT##port |= (1 << bit)):(PORT##port &= ~(1 << bit));}\

__always_inline__ static
void GPIO_##name##_MakePullup(void) {GPIO_##name##_MakeIn(1);}

AVR_GPIO_ASSIGN(LED_1,B,0);
//LED_1-------PORTB0

AVR_GPIO_ASSIGN(LED_2,B,1);
//LED_2-------PORTB1

AVR_GPIO_ASSIGN(KEY,B,2); //KEY---------PORTB2

//C文件

volatile uint8 key;

int main()

{

GPIO_LED_1_MakeOut(0);
//LED_1设为输出,初始输出低

GPIO_LED_2_MakeOut(0);
//LED_2设为输出,初始输出低

GPIO_KEY_MakeIn(1);
//KEY设为输入,初始上拉

GPIO_LED_1_Set(); //LED_1输出高

GPIO_LED_1_Clr(); //LED_1输出低

GPIO_LED_2_Set(); //LED_2输出高

GPIO_LED_2_Clr(); //LED_2输出低

key=GPIO_KEY_Read(); //读取KEY

while(1);

}

源程序下载地址：http://download.csdn.net/detail/dearwind153/4196937