用stm32f103串口接收数据时怎么把接收数据做判断处理，例如接收到48-50mm输出1,接收51-53输出0

彩虹桥 · 发表于 2019-1-17 21:19:26

用stm32f103串口接收数据时怎么把接收数据做判断处理，例如接收到48-50mm输出1,接收51-53输出0请大神指点交流,谢谢~

#include "usart.h"

void USART1_Init(u32 bound)
{
//GPIO端口设置
      GPIO_InitTypeDef GPIO_InitStructure;
      USART_InitTypeDef USART_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);


      /*  ÅäÖÃGPIOμÄÄ￡ê½oíIO¿ú */
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//TX                         //′®¿úêä3&#246

A9
      GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;          //¸′óÃíÆíìêä3ö
      GPIO_Init(GPIOA,&GPIO_InitStructure);  /* 3õê¼»ˉ′®¿úêäèëIO */
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX                      //′®¿úêäè&#235

A10
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;                //Ä￡Äaêäèë
      GPIO_Init(GPIOA,&GPIO_InitStructure); /* 3õê¼»ˉGPIO */


//USART1 3õê¼»ˉéèÖÃ
      USART_InitStructure.USART_BaudRate = bound;//2¨ìØÂêéèÖÃ
      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_Cmd(USART1, ENABLE);  //ê1Äü′®¿ú1

      USART_ClearFlag(USART1, USART_FLAG_TC);

      USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆôÏà1ØÖD¶Ï

      //Usart1 NVIC ÅäÖÃ
      NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//′®¿ú1ÖD¶Ïí¨μà
      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÷¡￠
}

void USART1_IRQHandler(void)                      //′®¿ú1ÖD¶Ï·tÎñ3ìDò
{
      u8 r;
      if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //½óêÕÖD¶Ï
      {
            r =USART_ReceiveData(USART1);//(USART1->DR);       //¶áè¡½óêÕμ½μÄêy¾Y
            USART_SendData(USART1,r);
            while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET);
      }
      USART_ClearFlag(USART1,USART_FLAG_TC);
}