main.c

来自「开源的国外AT91SAM7S64开发板」· C语言 代码 · 共 48 行

// This program shows how to work with USART port
// USART0 and USART 1 (respectively RS232_0 connector and RS232_1 connector) returns echo + *
// Notice: Jumper RXDO/DRXD must be in position RXDO
//         Jumper TXDO/DTXD must be in position TXDO

#include "AT91SAM7S64.h"
#include "system.h"
#include "usart.h"

//it's a simple delay
void Delay (unsigned long a) { while (--a!=0); }

//variables for readed char from uart
unsigned int ch1 = 0;
unsigned int ch2 = 0;

int main()
{
  /**** System init ****/
  InitFrec();

  /**** UART ****/
  InitUSART0();
  InitUSART1();

  while(1)
  {

    /*** UART ***/
    ch1 = read_char_USART0_nonstop();
    if(ch1 != 0)
    {
      write_char_USART0(ch1);
      write_char_USART0('*');
      ch1 = 0;
    }

    ch2 = read_char_USART1_nonstop();
    if(ch2 != 0)
    {
      write_char_USART1(ch2);
      write_char_USART1('*');
      ch2 = 0;
    }
  }
}