在Stc单片机上利用串口实现人机交互例（改编自KEIL C51 V7.0

niubility · 发表于 2022-10-8 10:28

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//在Stc单片机上利用串口实现人机交互例（改编自KEIL C51 V7.0）
#include"STC8AXX.h"
#include<stdio.h>
#include"types.h"
#include"Qport.h"
#include"delay.h"

#define uchar  unsigned char
#define uint unsigned int
#define FOSC 11059200UL
#define BAUD1             9600UL
#define BRT1 (65536 - FOSC / BAUD1 / 4)                               //FEE0

uchar code *s ="Please input the following commands:\n"
               "Inport  p       (read port)\n"
            "Outport p nnn       (write port)\n"
            " where p=0..3, nnn=0..255\n"
               "Help or ?  (display this text)\n";

uchar help(){
  printf( "\n%s\n", Q );
  return 0;
}

uchar Inport( uchar idata *rbuf ) {
         uint p;
            uchar v;
      if( sscanf( rbuf, "%i", &p ) != 1 )
return 1;
                  case 0: v=P0; break;
                  case 1: v=P1; break;
                  case 2: v=P2; break;
                  case 3: v=P3; break;
                  case 4: v=P4; break;
                  case 5: v=P5; break;
                  case 6: v=P6; break;
                  case 7: v=P7; break;

      default: return 2;
      }
      printf( "Port P%d = %02X\n", p, (uint)v );
      return 0;
}

uchar Outport( uchar idata *rbuf ) {
      uint p, v;
      if( sscanf( rbuf, "%i%i", &p, &v ) != 2 )
                  return 1;
      switch( p ){
                  case 0: P0=v; break;
                  case 1: P1=v; break;
                  case 2: P2=v; break;
                  case 3: P3=v; break;
                  case 4: P4=v; break;
                  case 5: P5=v; break;
                  case 6: P6=v; break;
                  case 7: P7=v; break;

                     default: return 2;
      }
      return 0;
}

void main( void ) {
uchar idata buf[41];

      uchar elevel;
      uchar mjs;
      Qport_init();

//SCON:SM0 SM1 SM2 REN TB8 RB8 TI RI
//    0 1 0 1 X X 1  0
      SCON = TI_+REN_+SM1_;                                                             //0x52

//TMOD: T1_GATE  T1_C/T  T1_M1 T1_M0 T1_GATE  T0_C/T  T0_M1  T0_M0
//       0       0    0    0    0       0    0    0
//
  TMOD = 0x00;
//AUXR: T0x12 T1x12       UART_M0x6  T2R T2_C/T T2x12 EXTRAM S1ST2
//       1    1       0    0 0    0    0    0

      AUXR = 0xc0;
      TL1 = BRT1;
  TH1 = BRT1 >> 8;
  TR1 = 1;

      for(;;){

//             if(!P30) IAP_CONTR=0x60;
//                      WDT_CONTR|=0x10;

                     for(mjs=0;mjs<=2;mjs++){
                                    DelayMs(200);
//                                     LED1=!LED1;
                                    LED2=!LED2;
                                    LED3=!LED3;
//                                     LED4=!LED4;
                                             }

                                    help();
                                    putchar('>');
                                    gets(buf,20);
                                    switch( elevel = command( buf ) ){
                                             case 0: break;
                                             default: printf( "Error %d\n\n", (uint)elevel );}
            }
      }

//命令解析
#include<stdlib.h>
#include<types.h>

typedef struct {
      uchar code *name;
      uchar (code *func)(uchar idata *);
}comm_struct;

comm_struct code comm_tab[] = {
            "Inport", Inport,
            "Outport", Outport,
            "help", help,
            "?", help,
            "", NULL
};

uchar command( uchar idata *buf ) {
      uchar i, j;
      for( i = 0;; )
                  for( j = 0;; ){
                  if( comm_tab[i].name[j] != 0 ){
      if( ((comm_tab[i].name[j] ^ buf[j]) & 0x5F) == 0 ){
                              j++;
                                                continue;
                     }
                              i++;
      break;
                  }
                  if( j == 0 )       return 255;
                  return comm_tab[i].func( buf+j );
                  }
}

名字好听吗 · 发表于 2022-10-8 13:56

利用串口调试软件进行调试时，应输入如：inport 3\n这样的命令。

Crash · 发表于 2022-10-8 14:18

串口调试。先使能IO时钟、串口时钟。配置对应的IO引脚复用为串口。设置串口的线路，例如：串口时钟分频、每次发送的位数、停止位、校验位、波特率。设置串口中断优先级、使能串口中断、使能总中断。编写串口中断处理函数。最后写发送函数。

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在Stc单片机上利用串口实现人机交互例（改编自KEIL C51 V7.0

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