串口

#include <reg52.h>#include "./delay/delay.h"/*==================功能：串口初始化==================*/void uart_init(){    SCON = 0x50;    //设置串口的工作方式，8N1TMOD |= 0x20;   //设置定时器的工作方式，用作串口波特率TH1 = 0xfd;     //设置串口的波特率为9600TR1 = 1;}/*============================功能：通过串口发送单个字符============================*/void uart_send_byte(unsigned char byte){    SBUF = byte;   while(!TI);     //TI：硬件自动置1，手动清0 TI = 0;}void main(){    uart_init();    while(1){    uart_send_byte(0x55);delay_s(1);}}