STC12C5A60S2-uart.rar_9位uart_STC12C5A*_STC12C5A60S2 串口_stc12c5a6

#include "reg51.h" #define FOSC 18432000L #define BAUD 115200 #define NONE_PARITY 0 //无校验位 #define ODD_PARITY 1 //奇校验 #define EVEN_PARITY 2 //偶校验 #define MARK_PARITY 3 //标记校验 #define SPACE_PARITY 4 //空校验 #define PARITYBIT EVEN_PARITY #define S2RI 0x01 #define S2TI 0x02 #define S2RB8 0x04 #define S2TB8 0x08 sfr AUXR = 0x8e; sfr S2CON = 0x9a; sfr S2BUF = 0x9b; sfr BRT = 0x9c; sfr IE2 = 0xaf; bit busy; void SendData(char dat); void SendString(char *s); void main() { #if (PARITYBIT == NONE_PARITY) S2CON = 0x5a; //8位可变波特率 (无校验位) #elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY) S2CON = 0xda; //9位可变波特率,校验位初始为1 #elif (PARITYBIT == SPACE_PARITY) S2CON = 0xd5; //9位可变波特率,校验位初始为0 #endif BRT = -(FOSC/32/BAUD); //设置独立波特率发生器的重载初值 AUXR = 0x14; //独立波特率发生器工作在1T模式 IE2 = 0x01; //使能串口2中断 EA = 1; //开总中断 SendString("STC12C5A60S2\r\nUart2 Test !\r\n"); while(1); } void Uart2() interrupt 8 using 1 { if (S2CON & S2RI) { S2CON &= ~S2RI; //清除接收完成标志 P0 = S2BUF; //P0显示串口数据 P2 = (S2CON & S2RB8); //P2.2显示校验位 } if (S2CON & S2TI) { S2CON &= ~S2TI; //清除发送完成标志 busy = 0; } } void SendData(char dat) { while (busy); //等待上个数据发送完成 ACC = dat; //取得偶校验位P if (P) //根据P来设置串口数据的校验位 { #if (PARITYBIT == ODD_PARITY) S2CON &= ~S2TB8; //置校验位为0 #elif (PARITYBIT == EVEN_PARITY) S2CON |= S2TB8; //置校验位为1 #endif } else { #if (PARITYBIT == ODD_PARITY) S2CON |= S2TB8; //置校验位为1 #elif (PARITYBIT == EVEN_PARITY) S2CON &= ~S2TB8; //置校验位为0 #endif } busy = 1; S2BUF = ACC; //发送数据 } void SendString(char *s) { while (*s) //判断字符串结束标志 { SendData(*s++); //发送字符 } }