大佬们，外设可以发送数据，但是stm32c8t6收不到数据是为什么，接线也没有错 -

标题: 大佬们，外设可以发送数据，但是stm32c8t6收不到数据是为什么，接线也没有错 [打印本页]

作者: @小白菜 时间: 2023-8-5 02:03
标题: 大佬们，外设可以发送数据，但是stm32c8t6收不到数据是为什么，接线也没有错
下边是这一部分的代码

#include "stm32f10x.h" // Device header
#include "OLED.h"

uint32_t CoOrdinates[11];//stm32接收到的数据
int x1,y1,x2,y2,x3,y3,x4,y4;

void Serival_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); //??USART??
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //??GPIO??

GPIO_InitTypeDef GPIO_InitStructure;
//RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;                                                                      //????
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

USART_InitTypeDef USART_InitStructure;                                                                                  //?????
USART_InitStructure.USART_BaudRate = 115200;                                                                      //???
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //?????
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;          //????,???????
USART_InitStructure.USART_Parity = USART_Parity_No;                   //???
USART_InitStructure.USART_StopBits = USART_StopBits_1;          //???,??1????
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //??
USART_Init(USART1, &USART_InitStructure);                                                                               //???

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);                                                                   //??RXNE????NVIC???

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);                                                                   //??

NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);

USART_Cmd(USART1, ENABLE);                                                                                                          //??USART
}

void K210_Data(void)//??????K210???
{
x1 = CoOrdinates[2];
y1 = CoOrdinates[3];
x2 = CoOrdinates[4];
y2 = CoOrdinates[5];
x3 = CoOrdinates[6];
y3 = CoOrdinates[7];
x4 = CoOrdinates[8];
y4 = CoOrdinates[9];
}

void Receive_K210_Data(int16_t data)//??K210??????
{
static u8 state = 0;
uint8_t i;

if(state == 0 && data == 0xaa)//?????
{
      state = 1;
      CoOrdinates[0] = data;
}
else if(state == 1 && data == 0xab)//?????
{
      state = 2;
      CoOrdinates[1] = data;
}
else if(state == 2)//???????
{
      for(i = 2; i < 10; i++)
      {
         CoOrdinates[i] = data;
      }
      state=3;
}
else if(state == 3)       //???????????,??????
{
      if(data == 0xff)
      {
         state = 0;
         CoOrdinates[10] = data;
      }
      else if(data != 0xff)
      {
         state = 0;
         for(i = 0; i < 11; i++)
         {
            CoOrdinates[i] = data;
         }
      }
}
else
{
      state = 0;
      for(i = 0; i < 11; i++)
      {
         CoOrdinates[i] = 0x00;
      }
}
}

void USART1_IRQHandler(void)                   //串口1中断服务程序
{
uint8_t com_data;
#if SYSTEM_SUPPORT_OS       //如果SYSTEM_SUPPORT_OS为真，则需要支持OS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //接收中断(接收到的数据必须是0x0d 0x0a结尾)
      {
         USART_ClearFlag(USART1,USART_FLAG_RXNE);
         com_data = USART1->DR;
         Receive_K210_Data(com_data);
         K210_Data();

   }
#if SYSTEM_SUPPORT_OS    //如果SYSTEM_SUPPORT_OS为真，则需要支持OS.
OSIntExit();
#endif
}

作者: yzwzfyz 时间: 2023-8-5 09:42
复读串行通讯的原理。

作者: wxs732 时间: 2023-8-5 18:35
PA9 不需要初始化码

作者: @小白菜 时间: 2023-8-6 16:08

wxs732 发表于 2023-8-5 18:35
PA9 不需要初始化码

只是用于接收数据，不用吧

作者: @小白菜 时间: 2023-8-6 16:55

yzwzfyz 发表于 2023-8-5 09:42
复读串行通讯的原理。

读完了，发现代码接受没什么毛病，还是没找到，求指点

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