getchar.c

来自「单片无限收发芯片的一些资料」· C语言 代码 · 共 29 行

#include "stdio.h"
#include "io16f876.h"

// Simple implementation of the ANSI getchar() routine, reads from UART
int getchar(void)
{
  char dummy;

  
  /* Poll the serial port until a character is available*/
  while (RCIF==0) {
    if (OERR) {
      TXEN=0;
      TXEN=1;
      CREN=0;
      CREN=1;
    }
    if (FERR) {
      dummy=RCREG;
      TXEN=0;
      TXEN=1;
    }
  }

  return RCREG;   /* Return received character */
}