uart.c

两个单片机通信

#include <SPCE061V004.H>

 
void send(void);         //函数声明
unsigned int receive(void);
void light(unsigned int);




void main()
{
  unsigned int show;
  show=0;
  
//IO口的基本设置，A口用于接受键盘数据以及控制LED亮灯，B口用于串口通信
  
  *P_IOB_Dir=0xff7f;   //IOB7设置为输入，IOB10设置为输出
  *P_IOB_Attrib=0xffff;
  *P_UART_BaudScalarLow=0x006b;  //设置波特率
  *P_UART_BaudScalarHigh=0x0000;
  
  *P_UART_Command1=*P_UART_Command2=0x00c0; //设置串口控制位
  
  
  while(1)
  {
    *P_Watchdog_Clear=1;
    //send();
    show=receive();
    if(show!=0)
      light(show);
  }
  
}



void send()
{
    unsigned int data;
    data=serial_key();
    while(!*P_UART_Command2&0x0040)
    {
    }
    *P_UART_Data=data;
}

unsigned int receive()
{
  if(*P_UART_Command2&0x0080)    
    return(*P_UART_Data);
  else
    return(0);
}

void light(unsigned int data)
{
  show(0,data);
}