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標題: 有沒有用stc15單片機串口2的?遇到接收數據亂碼的嗎，發送正常 [打印本頁]

作者: 512254710 時間: 2020-11-15 15:28
標題: 有沒有用stc15單片機串口2的?遇到接收數據亂碼的嗎，發送正常
有沒有用stc15串口2的，遇到接收數據亂碼的嗎，發送正常

程序是stc的例程，
pc給單片機發數據0x44 ,把數據存到temp里面發回給pc，點一次發一個0x44，加在temp字符串后面，正確返回應該是 s t c 44 44 44 44 44
實際單片機返回 s t c F3 CD E6 DF DE CF EB
73 74 63 F3 CD E6 DF DE CF EB
73 74 63 F3 CD E6 DF DE CF EB
73 74 63 F3 CD E6 DF DE CF EB
73 74 63 F3 CD E6 DF DE CF EB
73 74 63 F3 CD E6 DF DE CF EB
73 74 63 F3 CD E6 DF DE CF EB

單片機源程序如下:
/* --- STC MCU Limited ------------------------------------------------*/
/* --- STC15F4K60S4 系列定時器2用作串口2的波特率發生器舉例------------*/
/* 如果要在程序中使用此代碼,請在程序中注明使用了STC的資料及程序       */
/* 如果要在文章中應用此代碼,請在文章中注明使用了STC的資料及程序       */
/*---------------------------------------------------------------------*/

//本示例在Keil開發環境下請選擇Intel的8058芯片型號進行編譯
//若無特別說明,工作頻率一般為11.0592MHz

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

typedef unsigned char BYTE;
typedef unsigned int WORD;

#define FOSC 11059200L       //系統頻率
#define BAUD 2400          //串口波特率

#define NONE_PARITY    0    //無校驗
#define ODD_PARITY    1    //奇校驗
#define EVEN_PARITY    2    //偶校驗
#define MARK_PARITY    3    //標記校驗
#define SPACE_PARITY 4    //空白校驗

#define PARITYBIT SPACE_PARITY //定義校驗位

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;             //輔助寄存器
sfr S2CON = 0x9a;             //UART2 控制寄存器
sfr S2BUF = 0x9b;             //UART2 數據寄存器
sfr T2H = 0xd6;             //定時器2高8位
sfr T2L = 0xd7;             //定時器2低8位
sfr IE2 = 0xaf;             //中斷控制寄存器2

#define S2RI  0x01             //S2CON.0
#define S2TI  0x02             //S2CON.1
#define S2RB8 0x04             //S2CON.2
#define S2TB8 0x08             //S2CON.3

sfr P_SW2 = 0xBA;          //外設功能切換寄存器2
#define S2_S0 0x01             //P_SW2.0

bit busy;
BYTE temp[10];
int  t = 3;

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;

P_SW2 &= ~S2_S0;          //S2_S0=0 (P1.0/RxD2, P1.1/TxD2)
//  P_SW2 |= S2_S0;          //S2_S0=1 (P4.6/RxD2_2, P4.7/TxD2_2)

      temp[0] ='s';
      temp[1] ='t';
      temp[2] ='c';

#if (PARITYBIT == NONE_PARITY)
S2CON = 0x50;             //8位可變波特率
#elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY)
S2CON = 0xda;             //9位可變波特率,校驗位初始為1
#elif (PARITYBIT == SPACE_PARITY)
S2CON = 0xd2;             //9位可變波特率,校驗位初始為0
#endif

T2L = (65536 - (FOSC/4/BAUD)); //設置波特率重裝值
T2H = (65536 - (FOSC/4/BAUD))>>8;
AUXR = 0x14;             //T2為1T模式, 并啟動定時器2
IE2 = 0x01;                //使能串口2中斷
EA = 1;

SendString("STC15F2K60S2\r\nUart2 Test !\r\n");
while(1){

      SendString(temp);
      }
}

/*----------------------------
UART2 中斷服務程序
-----------------------------*/
void Uart2() interrupt 8
{
if (S2CON & S2RI)
{
      S2CON &= ~S2RI;       //清除S2RI位
      temp[t++] = S2BUF;
            if(t>9)       t=0;

      P2 = (S2CON & S2RB8); //P2.2顯示校驗位
}
if (S2CON & S2TI)
{
      S2CON &= ~S2TI;       //清除S2TI位
      busy = 0;             //清忙標志
}
}

/*----------------------------
發送串口數據
----------------------------*/
void SendData(BYTE dat)
{
while (busy);             //等待前面的數據發送完成
ACC = dat;                //獲取校驗位P (PSW.0)
if (P)                   //根據P來設置校驗位
{
#if (PARITYBIT == ODD_PARITY)
      S2CON &= ~S2TB8;       //設置校驗位為0
#elif (PARITYBIT == EVEN_PARITY)
      S2CON |= S2TB8;       //設置校驗位為1
#endif
}
else
{
#if (PARITYBIT == ODD_PARITY)
      S2CON |= S2TB8;       //設置校驗位為1
#elif (PARITYBIT == EVEN_PARITY)
      S2CON &= ~S2TB8;       //設置校驗位為0
#endif
}
busy = 1;
S2BUF = ACC;             //寫數據到UART2數據寄存器
}

/*----------------------------
發送字符串
----------------------------*/
void SendString(char *s)
{
while (*s)                //檢測字符串結束標志
{
      SendData(*s++);       //發送當前字符
}
}

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