41 lines
878 B
C
41 lines
878 B
C
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#include "uart.h"
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__bit busy = 0;
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/*******************************************************************************
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* 函 数 名 : uart_init
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* 函数功能 : 串口通信中断配置函数，通过设置TH和TL即可确定定时时间
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* 输 入 : baud：波特率对应的TH、TL装载值
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* 输 出 : 无
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*******************************************************************************/
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void uart_init(u8 baud)
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{
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TMOD|=0X20; //设置计数器工作方式2
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SCON=0X50; //设置为工作方式1
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PCON=0X80; //波特率加倍
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TH1=baud; //计数器初始值设置
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TL1=baud;
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ES=1; //打开接收中断
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EA=1; //打开总中断
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TR1=1; //打开计数器
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}
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void send_string(char *s)
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{
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while(*s)
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{
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send_data(*s++);
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}
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}
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void send_data(u8 dat)
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{
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while(busy);
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busy = 1;
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SBUF = dat;
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}
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int putchar(char c)//重定向
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{
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send_data(c);
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return c;
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}
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