标题: STC单片机 串口2 调试不处理 [打印本页]
作者: ynzsc001    时间: 2020-1-9 17:11
标题: STC单片机 串口2 调试不处理
STC12C5A60S2 单片机有第二串口功能，整了好久硬是整不明白，调试不出来。恳请前辈指导指导





作者: ynzsc001    时间: 2020-1-9 19:03
并且我照STC官方的  S2CON &= ~S2RI;        操作也不行。
作者: angmall    时间: 2020-1-9 23:40
STC12C5A60S2单片机 串口2 中断 要使用  interrupt 8


  1. /*------------------------------------------------------------------*/
  2. /* --- STC MCU Limited ---------------------------------------------*/
  3. /* --- STC12C5Axx Series MCU UART2 (8-bit/9-bit)Demo ---------------*/
  4. /* --- Mobile: (86)13922805190 -------------------------------------*/
  5. /* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/
  6. /* --- Tel: 86-0513-55012928,55012929,55012966----------------------*/
  7. /* If you want to use the program or the program referenced in the  */
  8. /* article, please specify in which data and procedures from STC    */
  9. /*------------------------------------------------------------------*/

  11. #include "reg51.h"
  12. #include "intrins.h"

  14. typedef unsigned char BYTE;
  15. typedef unsigned int WORD;

  17. #define FOSC 11059200L      //System frequency
  18. #define BAUD 115200         //UART baudrate

  20. /*Define UART parity mode*/
  21. #define NONE_PARITY     0   //None parity
  22. #define ODD_PARITY      1   //Odd parity
  23. #define EVEN_PARITY     2   //Even parity
  24. #define MARK_PARITY     3   //Mark parity
  25. #define SPACE_PARITY    4   //Space parity

  27. #define PARITYBIT EVEN_PARITY   //Testing even parity

  29. /*Declare SFR associated with the UART2 */
  30. sfr AUXR  = 0x8e;           //Auxiliary register
  31. sfr S2CON = 0x9a;           //UART2 control register
  32. sfr S2BUF = 0x9b;           //UART2 data buffer
  33. sfr BRT   = 0x9c;           //Baudrate generator
  34. sfr IE2   = 0xaf;           //Interrupt control 2

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

  41. bit busy;

  43. void SendData(BYTE dat);
  44. void SendString(char *s);

  46. void main()
  47. {
  48. #if (PARITYBIT == NONE_PARITY)
  49.     S2CON = 0x50;           //8-bit variable UART
  50. #elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY)
  51.     S2CON = 0xda;           //9-bit variable UART, parity bit initial to 1
  52. #elif (PARITYBIT == SPACE_PARITY)
  53.     S2CON = 0xd2;           //9-bit variable UART, parity bit initial to 0
  54. #endif

  56.     BRT = -(FOSC/32/BAUD);  //Set auto-reload vaule of baudrate generator
  57.     AUXR = 0x14;            //Baudrate generator work in 1T mode
  58.     IE2 = 0x01;             //Enable UART2 interrupt
  59.     EA = 1;                 //Open master interrupt switch

  61.     SendString("STC12C5A60S2\r\nUart2 Test !\r\n");
  62.     while(1);
  63. }

  65. /*----------------------------
  66. UART2 interrupt service routine
  67. ----------------------------*/
  68. void Uart2() interrupt 8
  69. {
  70.     if (S2CON & S2RI)
  71.     {
  72.         S2CON &= ~S2RI;     //Clear receive interrupt flag
  73.         P0 = S2BUF;         //P0 show UART data
  74.         P2 = (S2CON & S2RB8);//P2.2 show parity bit
  75.     }
  76.     if (S2CON & S2TI)
  77.     {
  78.         S2CON &= ~S2TI;     //Clear transmit interrupt flag
  79.         busy = 0;           //Clear transmit busy flag
  80.     }
  81. }

  83. /*----------------------------
  84. Send a byte data to UART
  85. Input: dat (data to be sent)
  86. Output:None
  87. ----------------------------*/
  88. void SendData(BYTE dat)
  89. {
  90.     while (busy);           //Wait for the completion of the previous data is sent
  91.     ACC = dat;              //Calculate the even parity bit P (PSW.0)
  92.     if (P)                  //Set the parity bit according to P
  93.     {
  94. #if (PARITYBIT == ODD_PARITY)
  95.         S2CON &= ~S2TB8;    //Set parity bit to 0
  96. #elif (PARITYBIT == EVEN_PARITY)
  97.         S2CON |= S2TB8;     //Set parity bit to 1
  98. #endif
  99.     }
  100.     else
  101.     {
  102. #if (PARITYBIT == ODD_PARITY)
  103.         S2CON |= S2TB8;     //Set parity bit to 1
  104. #elif (PARITYBIT == EVEN_PARITY)
  105.         S2CON &= ~S2TB8;    //Set parity bit to 0
  106. #endif
  107.     }
  108.     busy = 1;
  109.     S2BUF = ACC;            //Send data to UART2 buffer
  110. }

  112. /*----------------------------
  113. Send a string to UART
  114. Input: s (address of string)
  115. Output:None
  116. ----------------------------*/
  117. void SendString(char *s)
  118. {
  119.     while (*s)              //Check the end of the string
  120.     {
  121.         SendData(*s++);     //Send current char and increment string ptr
  122.     }
  123. }

复制代码
作者: 笨笨兔    时间: 2020-1-10 09:05
楼上说得对,串口2 中断 要使用  interrupt 8.
--------------
从你给的图看,串口1 中断 和 串口2 中断 都使用 interrupt 4, 这个肯定有问题.
建议: 把串口2 中断 改为  interrupt 8.
作者: Host    时间: 2020-1-10 11:07
沙发的程序可以一试
作者: haierzaifei11    时间: 2020-1-10 13:11
不同入口，不同调用


interrupt 8
{
    if (S2CON & S2RI)
    {
        S2CON &= ~S2RI;     //Clear receive interrupt flag
        P0 = S2BUF;         //P0 show UART data
        P2 = (S2CON & S2RB8);//P2.2 show parity bit
    }
    if (S2CON & S2TI)
    {
        S2CON &= ~S2TI;     //Clear transmit interrupt flag
        busy = 0;           //Clear transmit busy flag
    }
}





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