自己写的串口通讯为什么一直收到的是00，求大神帮忙

whj467467274672 · 发表于 2017-7-16 17:30:38

主函数#include "stm32f10x.h"
#include "main.h"

uint16_t Data[8]={0x01,0x03,0x02,0x05,0x07,0x04,0x44,0x09};

uint16_t cout=0,USART_RX_COUNT=0;

int main(void)
{
  uint16_t i;
  USART1_Config();

  while (1)
  {

if(cout==0)
{
   GPIO_SetBits(GPIOC,GPIO_Pin_10);
   cout=1;

for(i=0;i<8;i++)
{
   UART1SendByte(Data[i]);
while (USART_GetFlagStatus(USART1,USART_FLAG_TC) !=SET);
USART_SendData(USART1, Data[i]);
LED_Delay(1000);
}

   LED_Delay(12000);
}
   GPIO_ResetBits(GPIOC,GPIO_Pin_11); /

}

}

USART配置
#include "stm32f10x.h"
#include "bsp_usart.h"
#include "stm32f10x_usart.h"

void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 , ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //硬件流控制模式设置
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //接收和发送使能
USART_Init(USART1, &USART_InitStructure);
NVIC_Config_USART1(); //中断配置
USART_ClearFlag(USART1, USART_FLAG_TC);//防止第一个数据被覆盖
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);  //接收中断使能
USART_Cmd(USART1, ENABLE); //使能
}

static void NVIC_Config_USART1(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}


void UART1SendByte(uint16_t SendData)
{
      USART_SendData(USART1,SendData);
      while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);

}

unsigned char UART1GetByte(unsigned char* GetData)
{
      if(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
      {  return 0;
}
      *GetData = USART_ReceiveData(USART1);
      return 1;
}

neuangel · 发表于 2017-7-16 17:30:39

你得中断服务函数不对吧

unsigned char UART1GetByte(unsigned char* GetData)
这个不对吧
void USART3_IRQHandler(void)

whj467467274672 · 发表于 2017-7-16 17:31:27

新手一枚，请大神指教

whj467467274672 · 发表于 2017-7-16 18:30:49

顶起来

whj467467274672 · 发表于 2017-7-16 20:02:07

自己分析了一下，返回数据为00，是因为unsigned char UART1GetByte(unsigned char* GetData)
{
if(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
{ return 0;
}
*GetData = USART_ReceiveData(USART1);
return 1;
}
这个函数没有被调用，但是调用数据不知道怎么写，新手不太明白，望大神指教一下。

执迷 · 发表于 2017-7-17 08:10:00

把函数名改成USART1_IRQHandler。。中断函数名不是自己定的

whj467467274672 · 发表于 2017-7-17 11:36:47

执迷发表于 2017-7-17 08:10
把函数名改成USART1_IRQHandler。。中断函数名不是自己定的

static void NVIC_Config_USART1(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
  是改这个函数名吧

whj467467274672 · 发表于 2017-7-17 11:38:09

执迷发表于 2017-7-17 08:10
把函数名改成USART1_IRQHandler。。中断函数名不是自己定的

while (1)
  {

while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET); // Wait for Empty

USART_SendData(USART1, 0x49); // Send 'I'
  }
今天我把函数改成了，上诉样子，并且把中断全部注释掉了，理论上我应该是收到49，但是还是收到的是00