STC15W204S做一个串口通讯程序，为什么没有反应？

只看该作者 · 2019-10-24 10:45

本帖最后由 xiong0821 于 2019-10-25 16:00 编辑



//本示例在Keil开发环境下请选择Intel的8058芯片型号进行编译
//若无特别说明,工作频率一般为11.0592MHz

#include "reg51.h"
#include "intrins.h"

typedef unsigned char BYTE;
typedef unsigned int WORD;

#define FOSC 11059200L       //系统频率
#define BAUD 9600          //串口波特率

#define NONE_PARITY    0    //无校验
#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    //空白校验

#define PARITYBIT EVEN_PARITY //定义校验位

sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xC9;
sfr P5M0 = 0xCA;
sfr P6M1 = 0xCB;
sfr P6M0 = 0xCC;
sfr P7M1 = 0xE1;
sfr P7M0 = 0xE2;

sfr AUXR  = 0x8e;             //辅助寄存器
sfr T2H = 0xd6;             //定时器2高8位
sfr T2L = 0xd7;             //定时器2低8位

sfr P_SW1 = 0xA2;          //外设功能切换寄存器1

#define S1_S0 0x40             //P_SW1.6
#define S1_S1 0x80             //P_SW1.7

sbit P22 = P2^2;

bit busy;

void SendData(BYTE dat);
void SendString(char *s);

void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P6M0 = 0x00;
P6M1 = 0x00;
P7M0 = 0x00;
P7M1 = 0x00;

ACC = P_SW1;
ACC &= ~(S1_S0 | S1_S1); //S1_S0=0 S1_S1=0
P_SW1 = ACC;             //(P3.0/RxD, P3.1/TxD)

//  ACC = P_SW1;
//  ACC &= ~(S1_S0 | S1_S1); //S1_S0=1 S1_S1=0
//  ACC |= S1_S0;             //(P3.6/RxD_2, P3.7/TxD_2)
//  P_SW1 = ACC;
//
//  ACC = P_SW1;
//  ACC &= ~(S1_S0 | S1_S1); //S1_S0=0 S1_S1=1
//  ACC |= S1_S1;             //(P1.6/RxD_3, P1.7/TxD_3)
//  P_SW1 = ACC;

#if (PARITYBIT == NONE_PARITY)
SCON = 0x50;             //8位可变波特率
#elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY)
SCON = 0xda;             //9位可变波特率,校验位初始为1
#elif (PARITYBIT == SPACE_PARITY)
SCON = 0xd2;             //9位可变波特率,校验位初始为0
#endif

PCON &= 0x7F;             //波特率不倍速
SCON = 0x50;             //8位数据,可变波特率
      AUXR |= 0x01;             //串口1选择定时器2为波特率发生器
      AUXR |= 0x04;             //定时器2时钟为Fosc,即1T
      T2L = 0xE0;             //设定定时初值
      T2H = 0xFE;             //设定定时初值
      AUXR |= 0x10;             //启动定时器2
      ET2 = 0;             //禁止定时器2中断

SendString("STC15F2K60S2\r\nUart Test !\r\n");
while(1);
}

/*----------------------------
UART 中断服务程序
-----------------------------*/
void Uart() interrupt 4
{
if (RI)
{
      RI = 0;                //清除RI位
      P0 = SBUF;             //P0显示串口数据
      P22 = RB8;             //P2.2显示校验位
}
if (TI)
{
      TI = 0;                //清除TI位
      busy = 0;             //清忙标志
}
}

/*----------------------------
发送串口数据
----------------------------*/
void SendData(BYTE dat)
{
while (busy);             //等待前面的数据发送完成
ACC = dat;                //获取校验位P (PSW.0)
if (P)                   //根据P来设置校验位
{
#if (PARITYBIT == ODD_PARITY)
      TB8 = 0;             //设置校验位为0
#elif (PARITYBIT == EVEN_PARITY)
      TB8 = 1;             //设置校验位为1
#endif
}
else
{
#if (PARITYBIT == ODD_PARITY)
      TB8 = 1;             //设置校验位为1
#elif (PARITYBIT == EVEN_PARITY)
      TB8 = 0;             //设置校验位为0
#endif
}
busy = 1;
SBUF = ACC;                //写数据到UART数据寄存器
}

/*----------------------------
发送字符串
----------------------------*/
void SendString(char *s)
{
while (*s)                //检测字符串结束标志
{
      SendData(*s++);       //发送当前字符
}
}