標(biāo)題: 有人遇到過STC12C5A60S2串口2無法使用的問題嗎？ [打印本頁]
作者: jakcypater    時(shí)間: 2019-4-30 11:22
標(biāo)題: 有人遇到過STC12C5A60S2串口2無法使用的問題嗎？
有人遇到過STC12C5A60S2串口2無法使用的問題嗎？串口1正常能收發(fā)數(shù)據(jù)，用的官網(wǎng)提供的例程，百度發(fā)現(xiàn)很多人都遇到這個(gè)問題，目前還沒找到解決辦法。下載過http://www.torrancerestoration.com/bbs/dpj-133507-1.html也無法使用。
  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. /* --- Web: www.STCMCU.com -----------------------------------------*/
  8. /* --- Web: www.GXWMCU.com -----------------------------------------*/
  9. /* If you want to use the program or the program referenced in the  */
  10. /* article, please specify in which data and procedures from STC    */
  11. /*------------------------------------------------------------------*/

  13. #include "reg51.h"
  14. #include "intrins.h"

  16. typedef unsigned char BYTE;
  17. typedef unsigned int WORD;

  19. #define FOSC 11059200L      //System frequency
  20. #define BAUD 115200         //UART baudrate

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

  29. #define PARITYBIT EVEN_PARITY   //Testing even parity

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

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

  43. bit busy;

  45. void SendData(BYTE dat);
  46. void SendString(char *s);

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

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

  63.     SendString("STC12C5A60S2\r\nUart2 Test !\r\n");
  64.     while(1);
  65. }

  67. /*----------------------------
  68. UART2 interrupt service routine
  69. ----------------------------*/
  70. void Uart2() interrupt 8
  71. {
  72.     if (S2CON & S2RI)
  73.     {
  74.         S2CON &= ~S2RI;     //Clear receive interrupt flag
  75.         P0 = S2BUF;         //P0 show UART data
  76.         P2 = (S2CON & S2RB8);//P2.2 show parity bit
  77.     }
  78.     if (S2CON & S2TI)
  79.     {
  80.         S2CON &= ~S2TI;     //Clear transmit interrupt flag
  81.         busy = 0;           //Clear transmit busy flag
  82.     }
  83. }

  85. /*----------------------------
  86. Send a byte data to UART
  87. Input: dat (data to be sent)
  88. Output:None
  89. ----------------------------*/
  90. void SendData(BYTE dat)
  91. {
  92.     while (busy);           //Wait for the completion of the previous data is sent
  93.     ACC = dat;              //Calculate the even parity bit P (PSW.0)
  94.     if (P)                  //Set the parity bit according to P
  95.     {
  96. #if (PARITYBIT == ODD_PARITY)
  97.         S2CON &= ~S2TB8;    //Set parity bit to 0
  98. #elif (PARITYBIT == EVEN_PARITY)
  99.         S2CON |= S2TB8;     //Set parity bit to 1
  100. #endif
  101.     }
  102.     else
  103.     {
  104. #if (PARITYBIT == ODD_PARITY)
  105.         S2CON |= S2TB8;     //Set parity bit to 1
  106. #elif (PARITYBIT == EVEN_PARITY)
  107.         S2CON &= ~S2TB8;    //Set parity bit to 0
  108. #endif
  109.     }
  110.     busy = 1;
  111.     S2BUF = ACC;            //Send data to UART2 buffer
  112. }

  114. /*----------------------------
  115. Send a string to UART
  116. Input: s (address of string)
  117. Output:None
  118. ----------------------------*/
  119. void SendString(char *s)
  120. {
  121.     while (*s)              //Check the end of the string
  122.     {
  123.         SendData(*s++);     //Send current char and increment string ptr
  124.     }
  125. }

復(fù)制代碼


作者: 青龍書生    時(shí)間: 2019-4-30 16:32
我之前用官網(wǎng)的歷程發(fā)現(xiàn)有問題，后來就不用了
作者: angmall    時(shí)間: 2019-5-1 10:51
你可以試試這個(gè)

  1. #include "reg51.h"

  3. #define FOSC 11059200L
  4. #define BAUD 115200

  6. #define NONE_PARITY     0   //無校驗(yàn)位
  7. #define ODD_PARITY      1   //奇校驗(yàn)
  8. #define EVEN_PARITY     2   //偶校驗(yàn)
  9. #define MARK_PARITY     3   //標(biāo)記校驗(yàn)
  10. #define SPACE_PARITY    4   //空校驗(yàn)

  12. #define PARITYBIT NONE_PARITY

  14. #define S2RI  0x01
  15. #define S2TI  0x02
  16. #define S2RB8 0x04
  17. #define S2TB8 0x08

  19. sfr AUXR  = 0x8e;
  20. sfr S2CON = 0x9a;
  21. sfr S2BUF = 0x9b;
  22. sfr BRT   = 0x9c;
  23. sfr IE2   = 0xaf;

  25. bit busy;

  27. void SendData(char dat);
  28. void SendString(char *s);

  30. void main()
  31. {
  32. #if (PARITYBIT == NONE_PARITY)
  33.     S2CON = 0x5a;               //8位可變波特率 (無校驗(yàn)位)
  34. #elif (PARITYBIT == ODD_PARITY) || (PARITYBIT == EVEN_PARITY) || (PARITYBIT == MARK_PARITY)
  35.     S2CON = 0xda;               //9位可變波特率,校驗(yàn)位初始為1
  36. #elif (PARITYBIT == SPACE_PARITY)
  37.     S2CON = 0xd5;               //9位可變波特率,校驗(yàn)位初始為0
  38. #endif

  40.     BRT = -(FOSC/32/BAUD);      //設(shè)置獨(dú)立波特率發(fā)生器的重載初值
  41.     AUXR = 0x14;                //獨(dú)立波特率發(fā)生器工作在1T模式
  42.     IE2 = 0x01;                 //使能串口2中斷
  43.     EA = 1;                     //開總中斷

  45.     SendString("STC12C5A60S2\r\nUart2 Test !\r\n");
  46.     while(1);
  47. }

  49. void Uart2() interrupt 8 using 1
  50. {
  51.     if (S2CON & S2RI)
  52.     {
  53.         S2CON &= ~S2RI;         //清除接收完成標(biāo)志
  54.         P0 = S2BUF;             //P0顯示串口數(shù)據(jù)
  55.         P2 = (S2CON & S2RB8);   //P2.2顯示校驗(yàn)位
  56.     }
  57.     if (S2CON & S2TI)
  58.     {
  59.         S2CON &= ~S2TI;         //清除發(fā)送完成標(biāo)志
  60.         busy = 0;
  61.     }
  62. }

  64. void SendData(char dat)
  65. {
  66.     while (busy);               //等待上個(gè)數(shù)據(jù)發(fā)送完成
  67.     ACC = dat;                  //取得偶校驗(yàn)位P
  68.     if (P)                                                //根據(jù)P來設(shè)置串口數(shù)據(jù)的校驗(yàn)位
  69.     {
  70. #if (PARITYBIT == ODD_PARITY)
  71.         S2CON &= ~S2TB8;        //置校驗(yàn)位為0
  72. #elif (PARITYBIT == EVEN_PARITY)
  73.         S2CON |= S2TB8;         //置校驗(yàn)位為1
  74. #endif
  75.     }
  76.     else
  77.     {
  78. #if (PARITYBIT == ODD_PARITY)
  79.         S2CON |= S2TB8;         //置校驗(yàn)位為1
  80. #elif (PARITYBIT == EVEN_PARITY)
  81.         S2CON &= ~S2TB8;        //置校驗(yàn)位為0
  82. #endif
  83.     }
  84.     busy = 1;
  85.     S2BUF = ACC;                //發(fā)送數(shù)據(jù)
  86. }

  88. void SendString(char *s)
  89. {
  90.     while (*s)                  //判斷字符串結(jié)束標(biāo)志
  91.     {
  92.         SendData(*s++);         //發(fā)送字符
  93.     }
  94. }
復(fù)制代碼
作者: baddd    時(shí)間: 2020-5-14 17:05
angmall 發(fā)表于 2019-5-1 10:51
你可以試試這個(gè)

對我很有用。十分感謝�。�！



歡迎光臨 (http://www.torrancerestoration.com/bbs/) Powered by Discuz! X3.1