本人刚学32f103，很多基本知识理论不是很懂，根据学习光盘内的代码稍微做了一点修改，结果DS1，key1和wk_up正常，而DS0一一开始就点亮，按key0也没反应

灬卟灬 · 发表于 2015-9-14 21:51:13

[mw_shl_code=c,true]test_key.c文件中 #include "sys.h" #include "usart.h" #include "delay.h" #include "led.h" #include "key.h" int main(void) { Stm32_Clock_Init(9); delay_init(72); key_init(); led_init(); led0 = led1 = 1; while(1) { light_on(key_num()); } } key.c文件中 #include "key.h" #include "delay.h" void key_init(void) { RCC->APB2ENR |= 1<<2; //PA??APB2ENR????bit2 GPIOA->CRH &= 0X0F0FFFFF; //8~15????CRH????PA13??PA15 GPIOA->CRH |= 0X80800000; //PA13??PA15???????? GPIOA->ODR |= 1<<13; //PA13?????±?????????? GPIOA->ODR |= 1<<15; //PA15?????±?????????? GPIOA->CRL &= 0XFFFFFFF0; //0~7????CRL GPIOA->CRL |= 0X00000008; //PA0???????? // GPIOA->ODR |= 0<<0; //PA0?????±?????????? /***********?????í????PA0???????????ò??????????????????????**************/ } u8 key_num(void) { u8 num,key_lock = 0; //????°??ü×?×??? if(key_lock == 0 && (key0 == 0 || key1 == 0 || key_wk_up == 1)) { delay_ms(10); key_lock = 1; if(key0 == 0) num = 0; else if(key1 == 0) num = 1; else if(key_wk_up == 1) num = 2; } else if(key0 == 1 || key1 == 1 || key_wk_up == 0) { key_lock = 0; } return num; } key.h文件中 #ifndef _KEY_H_ #define _KEY_H_ #include "sys.h" #define key0 PAin(13) #define key1 PAin(15) #define key_wk_up PAin(0) void key_init(void); u8 key_num(void); #endif led.c文件中 #include "led.h" void led_init(void) { RCC->APB2ENR |= 1<<2; //PA???? RCC->APB2ENR |= 1<<5; //PD???? GPIOA->CRH &= 0XFFFFFFF0; //8~15????CRH GPIOA->CRH |= 0X00000003; //0X3???ì???? GPIOA->ODR |= 1<<8; //?????±?????????? GPIOD->CRL &= 0XFFFFF0FF; //0~7????CRL GPIOD->CRL |= 0X00000300; //0X3???ì???? GPIOD->ODR |= 1<<2; //?????±?????????? } void light_on(u8 num) { switch(num) { case 0: led0 = 0; break; case 1: led1 = 0; break; case 2: led0 = led1 = 1; break; default: break; } } led.h文件中 #ifndef _LED_H_ #define _LED_H_ #include "sys.h" #define led0 PAout(8) #define led1 PDout(2) void led_init(void); void light_on(u8); #endif [/mw_shl_code]

不知道是不是代码中的问题（刚学着写的，可能会有一些低级错误而我不知道的，还望指点，勿喷）