STM32通过串口发送字符命令控制LED状态

我不是许文强 · 发表于 2014-10-8 17:14:15

[mw_shl_code=c,true]#include "delay.h" #include "usart.h" #include "LED.h" #include"string.h" char RecOrder[]; //存储字符 u16 Num=0; u16 len; int main(void) { delay_init(); LED_Init(); uart_init(9600); while(1) { if(USART_RX_STA & 0x8000) { len=USART_RX_STA & 0x3fff; if(strcmp(RecOrder,"LED0_ON")==0) { LED0=0; Num=0; USART_RX_STA=0; } else if(strcmp(RecOrder,"LED0_OFF")==0) { LED0=1; Num=0; USART_RX_STA=0; } } } }[/mw_shl_code] [mw_shl_code=c,true]此代码是根据战舰STM32开发板USART源码程序修改的，还没有验证，大家看看有没有问题? usart.h函数改了中断服务函数，代码如下： [/mw_shl_code] [mw_shl_code=c,true]

[mw_shl_code=c,true]extern u16 Num; extern char RecOrder[]; void USART1_IRQHandler(void) { #ifdef OS_TICKS_PER_SEC OSIntEnter(); #endif if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { RecOrder[Num] =USART_ReceiveData(USART1);//(USART1->DR); if((USART_RX_STA&0x8000)==0) { if(USART_RX_STA&0x4000) { if(RecOrder[Num]!=0x0a)USART_RX_STA=0; else USART_RX_STA|=0x8000; } else { if(RecOrder[Num]==0x0d)USART_RX_STA|=0x4000; else { USART_RX_BUF[USART_RX_STA&0X3FFF]=RecOrder[Num]; USART_RX_STA++; if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0; } } } } #ifdef OS_TICKS_PER_SEC OSIntExit(); #endif } [/mw_shl_code] 大家帮我看看有没有问题，谢谢了！

[/mw_shl_code]

我不是许文强 · 发表于 2014-10-8 17:14:16

#include "sys.h"
#include "delay.h"
#include "led.h"
#include "beep.h"
//#include "key.h"
#include "usart.h"
#include "string.h"

char cmd[200];

int main(void)
{
u8 t;
u8 len;
// u16 times=0;

delay_init();      //???±??????????
LED_Init();    //????????LED??????????????
BEEP_Init();          //??????·??ù?÷????
// KEY_Init();
NVIC_Configuration();
uart_init(9600);
while(1)
{
if(USART_RX_STA&0x8000)
{
len=USART_RX_STA&0x3FFF;
for(t=0;t<len;t++)
{
cmd[t]=USART_RX_BUF[t];
while((USART1->SR&0X40)==0);
}
printf("\r\n receive successful \r\n");
USART_RX_STA=0;
USART_ClearFlag(USART1, USART_FLAG_RXNE);
if(!(strcmp(cmd,"led1_on")))
{
LED0=0;
memset(cmd,0,strlen(cmd));  //清除cmd[]
}
else if(!(strcmp(cmd,"led1_off")))
{
LED0=1;
memset(cmd,0,strlen(cmd)); //清除cmd[]
}
else
printf("\r\n input error");
memset(cmd,0,strlen(cmd)); //清除cmd[]
}
}
}
问题解决了，bug也找到了~大家可以参考一下！

jiutianshenjian · 发表于 2014-10-8 17:23:55

看不懂啊，你不是许文强，你是黄金荣吗？

我不是许文强 · 发表于 2014-10-8 17:31:58

回复【2楼】jiutianshenjian:
---------------------------------
黄金荣？啥意思？

jiutianshenjian · 发表于 2014-10-8 17:44:27

回复【3楼】我不是许文强:
---------------------------------
上海滩老大

Ezio · 发表于 2014-10-22 19:55:43

楼主，我做出来了请参考一下
#include "sys.h"
#include "usart.h"
#include "delay.h"
#include "led.h"
#include "string.h"
unsigned char rd[];
int main(void)
{
   u16 t;u16 len;u16 times=0;  //?è???®??????
   Stm32_Clock_Init(9); //  ?????±????????
   uart_init(72,9600); //   ?®???????? ?¨??????9600
   delay_init(72);  // ???±??????
   LED_Init(); // LED????????
   while(1)
{
LED1=1;
LED0=1;
if(USART_RX_STA&0x8000)
{
len=USART_RX_STA&0X0FFF;
printf("\r\n??·?????????????\r\n  \r\n");
    for(t=0;t<len;t++)
{
USART1->DR=USART_RX_BUF[t];
rd[t]=USART_RX_BUF[t];
while((USART1->SR&0X40)==0);
}
printf("\r\n\r\n");
USART_RX_STA=0;
}
else
if(strcmp(rd,"led_on"))
{
LED1=0;
LED0=1;
}
else if(strcmp(rd,"led_off"))
{
LED1=1;
LED0=0;
}

}
}
这个有BUG只能变两次

Ezio · 发表于 2014-10-22 20:53:43

[mw_shl_code=c,true]#include "sys.h" #include "usart.h" #include "delay.h" #include "led.h" #include "string.h" unsigned char rd[]; int main(void) { int i=0; u16 t;u16 len;u16 times=0; //?è???®?????? Stm32_Clock_Init(9); // ?????±???????? uart_init(72,9600); // ?®???????? ?¨??????9600 delay_init(72); // ???±?????? LED_Init(); // LED???????? while(1) { LED1=1; LED0=1; if(USART_RX_STA&0x8000) { len=USART_RX_STA&0X0FFF; printf("\r\n??·?????????????\r\n \r\n"); for(t=0;t<len;t++) { USART1->DR=USART_RX_BUF[t]; rd[t]=USART_RX_BUF[t]; while((USART1->SR&0X40)==0); } printf("\r\n\r\n"); USART_RX_STA=0; } switch(rd[len-1]) { case '1'

ED0=0; break; case '2'

ED1=0; break; case '3' : LED0=1; break; default

ED1=1; LED0=1; } } } BUG修好了，亲测，没有问题[/mw_shl_code]