uart.c

来自「LPC2131 ,Printf函数通过串口1向上位机软件发送数据」· C语言 代码 · 共 26 行

#include "config.h"

#define CR     0x0D

/* Implementation of putchar (also used by printf function to output data)    */
unsigned char sendchar (unsigned char ch)  {                 /* Write character to Serial Port    */
   if (ch == '\n')  {
    while (!(U0LSR & 0x20));
    U0THR = CR;                          /* output CR */
  }
  while (!(U0LSR & 0x20));
  return (U0THR = ch);
}

int getkey (void)  {                     /* Read character from Serial Port   */
  while (!(U0LSR & 0x01));
  return (U0RBR);
}

unsigned char getchar(void)
{
	return getkey();
}