ht32跟51单片机串口通信代码

以下是HT32和51单片机之间的串口通信代码，其中假定使用了8051的P2口作为串口的TXD和RXD引脚，HT32的USART2作为串口：

HT32代码：

#include "ht32.h"
#include "ht32_board.h"

void USART2_IRQHandler(void)
{
  if (USART_GetFlagStatus(HT_USART2, USART_FLAG_RXDNE) == SET)
  {
    uint8_t data = USART_ReceiveData(HT_USART2);
    //处理接收到的数据...
  }
}

void USART_Configuration(void)
{
  USART_InitTypeDef USART_InitStructure;
  USART_InitStructure.USART_BaudRate = 9600;
  USART_InitStructure.USART_WordLength = USART_WORDLENGTH_8B;
  USART_InitStructure.USART_StopBits = USART_STOPBITS_1;
  USART_InitStructure.USART_Parity = USART_PARITY_NO;
  USART_InitStructure.USART_Mode = USART_MODE_TX_RX;
  USART_InitStructure.USART_HardwareFlowControl = USART_HARDWAREFLOWCONTROL_NONE;
  USART_Init(HT_USART2, &USART_InitStructure);

  USART_ITConfig(HT_USART2, USART_IT_RXDNE, ENABLE);
  NVIC_EnableIRQ(USART2_IRQn);

  USART_Cmd(HT_USART2, ENABLE);
}

int main(void)
{
  CKCU_Configuration();
  USART_Configuration();
  
  while(1)
  {
    //发送数据
    USART_SendData(HT_USART2, 'H');
    USART_SendData(HT_USART2, 'e');
    USART_SendData(HT_USART2, 'l');
    USART_SendData(HT_USART2, 'l');
    USART_SendData(HT_USART2, 'o');
    USART_SendData(HT_USART2, '\r');
    USART_SendData(HT_USART2, '\n');
    
    //延时
    for(int i=0; i<1000000; i++);
  }
}

51代码：

#include <reg52.h>

void UART_Init()
{
  TMOD |= 0x20;
  TH1 = 0xFD;
  TL1 = 0xFD;
  TR1 = 1;
  SM0 = 0;
  SM1 = 1;
  EA = 1;
  ES = 1;
}

void UART_TX_Char(unsigned char dat)
{
  SBUF = dat;
  while(TI == 0);
  TI = 0;
}

void UART_RX_Char() interrupt 4
{
  unsigned char dat;
  if(RI == 1)
  {
    dat = SBUF;
    RI = 0;
    //处理接收到的数据...
  }
}

void main()
{
  UART_Init();

  while(1)
  {
    //发送数据
    UART_TX_Char('H');
    UART_TX_Char('e');
    UART_TX_Char('l');
    UART_TX_Char('l');
    UART_TX_Char('o');
    UART_TX_Char('\r');
    UART_TX_Char('\n');
    
    //延时
    for(int i=0; i<10000; i++);
  }
}