新手求助STM32程序，为什么串口命令只有第一次有效

hsh1024 · 发表于 2019-7-20 23:19:38

int main(void)
{
delay_init();
uart_init(115200);
LED_init();
LED0=0;
BEEP_init();
KEY_init();
while(1)
{

USER_USART1_CMD((char *)USART_RX_BUF);

}
}

//èç1ûê1óÃucos,Ôò°üà¨ÏÂÃæμÄí·ÎÄ¼t¼′¿é.
#if SYSTEM_SUPPORT_OS
#include "includes.h" //ucos ê1óÃ
#endif
//////////////////////////////////////////////////////////////////////////////////
//±¾3ìDòÖ»1©Ñ§Ï°ê1óÃ￡¬Î′¾-×÷ÕßDí¿é￡¬2»μÃóÃóúÆäËüèÎoÎóÃí¾
//ALIENTEK STM32¿a·￠°å
//′®¿ú13õê¼»ˉ
//ÕyμãÔ-×ó@ALIENTEK
//¼¼êõÂÛì3:www.openedv.com
//DT¸ÄèÕÆú:2012/8/18
//°æ±¾￡oV1.5
//°æè¨ËùóD￡¬μá°æ±Ø¾¿¡￡
//Copyright(C) 1ãÖYêDDÇòíμç×ó¿Æ¼¼óDÏT1«Ë¾ 2009-2019
//All rights reserved
//********************************************************************************
//V1.3DT¸ÄËμÃ÷
//Ö§3Öêêó|2»í¬ÆμÂêÏÂμÄ′®¿ú2¨ìØÂêéèÖÃ.
//¼óèëáË¶ÔprintfμÄÖ§3Ö
//Ôö¼óáË′®¿ú½óêÕÃüáî1|Äü.
//DTÕyáËprintfμúò»¸ö×Ö·û¶aê§μÄbug
//V1.4DT¸ÄËμÃ÷
//1,DT¸Ä′®¿ú3õê¼»ˉIOμÄbug
//2,DT¸ÄáËUSART_RX_STA,ê1μÃ′®¿ú×î′ó½óêÕ×Ö½úêyÎa2μÄ14′Î·½
//3,Ôö¼óáËUSART_REC_LEN,óÃóú¶¨òå′®¿ú×î′óÔêDí½óêÕμÄ×Ö½úêy(2»′óóú2μÄ14′Î·½)
//4,DT¸ÄáËEN_USART1_RXμÄê1Äü·½ê½
//V1.5DT¸ÄËμÃ÷
//1,Ôö¼óáË¶ÔUCOSIIμÄÖ§3Ö
//////////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////
//¼óèëòÔÏÂ′úÂë,Ö§3Öprintfoˉêy,¶ø2»DèòaÑ¡Ôñuse MicroLIB
#if 1
#pragma import(__use_no_semihosting)
//±ê×¼¿aDèòaμÄÖ§3Öoˉêy
struct __FILE
{
int handle;

};

FILE __stdout;
//¶¨òå_sys_exit()òÔ±üÃaê1óÃ°ëÖ÷»úÄ￡ê½
_sys_exit(int x)
{
x = x;
}
//ÖØ¶¨òåfputcoˉêy
int fputc(int ch, FILE *f)
{
while((USART1->SR&0X40)==0);//Ñ-»··￠Ëí,Ö±μ½·￠Ëííê±Ï
USART1->DR = (u8) ch;
return ch;
}
#endif

/*ê1óÃmicroLibμÄ·½·¨*/
/*
int fputc(int ch, FILE *f)
{
USART_SendData(USART1, (uint8_t) ch);

while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}

return ch;
}
int GetKey (void)  {

while (!(USART1->SR & USART_FLAG_RXNE));

return ((int)(USART1->DR & 0x1FF));
}
*/

#if EN_USART1_RX //èç1ûê1ÄüáË½óêÕ
//′®¿ú1ÖD¶Ï·tÎñ3ìDò
//×￠òa,¶áè¡USARTx->SRÄü±üÃaÄaÃûÆäÃîμÄ′íÎó
u8 USART_RX_BUF[USART_REC_LEN];    //½óêÕ»o3å,×î′óUSART_REC_LEN¸ö×Ö½ú.
//½óêÕ×′ì¬
//bit15￡¬ ½óêÕíê3é±êÖ¾
//bit14￡¬ ½óêÕμ½0x0d
//bit13~0￡¬ ½óêÕμ½μÄóDD§×Ö½úêyÄ¿
u16 USART_RX_STA=0;    //½óêÕ×′ì¬±ê¼Ç

void uart_init(u32 bound){
  //GPIO¶Ë¿úéèÖÃ
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //ê1ÄüUSART1￡¬GPIOAê±Öó

//USART1_TX GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸′óÃíÆíìêä3ö
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉGPIOA.9

  //USART1_RX    GPIOA.103õê¼»ˉ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//¸¡¿Õêäèë
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉGPIOA.10

  //Usart1 NVIC ÅäÖÃ
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//ÇàÕ¼óÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //×óóÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷

//USART 3õê¼»ˉéèÖÃ

USART_InitStructure.USART_BaudRate = bound;//′®¿ú2¨ìØÂê
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8Î»êy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí￡Ö1Î»
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæÅ¼D￡ÑéÎ»
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //êÕ·￠Ä￡ê½

  USART_Init(USART1, &USART_InitStructure); //3õê¼»ˉ′®¿ú1
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆô′®¿ú½óêüÖD¶Ï
  USART_Cmd(USART1, ENABLE);                   //ê1Äü′®¿ú1

}

void USART1_IRQHandler(void)             //′®¿ú1ÖD¶Ï·tÎñ3ìDò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //èç1ûSYSTEM_SUPPORT_OSÎaÕæ￡¬ÔòDèòaÖ§3ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //½óêÕÖD¶Ï(½óêÕμ½μÄêy¾Y±ØDëêÇ0x0d 0x0a½áÎ2)
{
Res =USART_ReceiveData(USART1); //¶áè¡½óêÕμ½μÄêy¾Y

if((USART_RX_STA&0x8000)==0)//½óêÕÎ′íê3é
{
if(USART_RX_STA&0x4000)//½óêÕμ½áË0x0d
{
if(Res!=0x0a)USART_RX_STA=0;//½óêÕ′íÎó,ÖØDÂ¿aê¼
else
{
USART_RX_STA|=0x8000; //½óêÕíê3éáË
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res;
}
}
else //»1Ã»êÕμ½0X0D
{
if(Res==0x0d)
{
USART_RX_STA|=0x4000;
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res;
USART_RX_STA++;
}
else
{
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res;
USART_RX_STA++;
if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//½óêÕêy¾Y′íÎó,ÖØDÂ¿aê¼½óêÕ
}
}
}
   }

#if SYSTEM_SUPPORT_OS //èç1ûSYSTEM_SUPPORT_OSÎaÕæ￡¬ÔòDèòaÖ§3ÖOS.
OSIntExit();
#endif
}
#endif

void USER_USART1_CMD(char *ptr)
{
{
if(strcmp("LED0 ON",ptr)==0)
{
printf("LED0 OPEN\r\n");
LED0=0;
USART_RX_STA=0;
}
else if(strcmp("LED0 OFF",ptr)==0)
{
printf("LED0 CLOSE\r\n");
LED0=1;
USART_RX_STA=0;
}
else if(strcmp("LED1 ON",ptr)==0)
{
printf("LED1 OPEN\r\n");
LED1=0;
USART_RX_STA=0;
}
else if(strcmp("LED1 OFF",ptr)==0)
{
printf("LED1 CLOSE\r\n");
LED1=1;
USART_RX_STA=0;
}
// else USART_RX_STA=0;
}
}