uart.c

来自「音乐控制程序」· C语言 代码 · 共 23 行

#include<AT89x55.H> 
#include  "uart.h"


//*********************************
//
//*********************************
void uart_init()
{
   SCON  = 0xDA;        // SCON: mode 1, 8-bit UART, enable rcvr      */
   TMOD |= 0x20;        // TMOD: timer 1, mode 2, 8-bit reload        */
   TH1   = 0xFD;         // TH1:  reload value for 1200 baud @ 12MHz   */
   TR1   = 1;           // TR1:  timer 1 run                          */
   TI    = 1;           // TI:   set TI to send first char of UART    */
   
}

void send(unsigned char ch)
   {SBUF=ch;
    while(TI==0);
    TI=0;
    }