heat.lst

用pic18fxx8单片机和热敏电阻实现温度的测量

     1: //;*************************************************
     2: //;* heat.c                                     **
     3: //;*************************************************
     4: //;* 本程序为热敏电阻输入处理模块程序
     5: //;* 将温度值在LCD特定位置显示
     6: //;* 占用I/O     RA1,RB5,RB4,RB3
     7: //;* 使用RAM
     8: //;* 程序包括:
     9: //;*   - tempdeal    热敏电阻输入处理子程序
    10: //;*   - heattab     温度值校准表
    11: //;*
    12: //;* 入口参数    无
    13: //;* 出口参数    TempH,TempL  (温度值)
    14: //;*************************************************
    15: #include  <pic18.h>       // ;定义所用单片机的头文件
    16: #define  TSRCLK  TRISB5
    17: #define  TRCLK   TRISB4
    18: #define  TSER    TRISB3
    19: #define  SRCLK   RB5
    20: #define  RCLK    RB4
    21: #define  SER     RB3
    22: #define  ADGO    GODONE
    23: 
    24: 
    25: void preled(void)
    26: {TSRCLK=0;
    27:  TRCLK=0;
    28:  TSER=0;
    29:  SRCLK=0;
    30:  RCLK=0;
    31:  SER=0;
    32: }
    33: void moniled (char led_data)
    34: {  //MONILED;     入口参数LED_DATA,需要为
    35:   //;芯片全部在时钟上升沿完成动作，故需在低电平期间完成数据的变化。先发送高位
    36:      char i=8;
    37:      for(i=8;i!=0;i--)
    38:   {if(led_data&0x80)
    39:     SER=1;
    40:    else
    41:     SER=0;
    42:    led_data<=1;
    43:    asm("nop");
    44:    SRCLK=1;
    45:    asm("nop");
    46:    SRCLK=0;
    47:   }
    48:     RCLK=0;
    49:     asm("nop");
    50:     RCLK=1;
    51:     RCLK=0;
    52: }
    53: 
    54: void delay(unsigned int i)
    55: {
    56:  while(i)
    57:     {   NOP();
    58:         --i;
    59:     }
    60:  }
    61: 
    62: void iniheat()
    63: {
    64:  ADCON1=0x0D;
    65:  ADCON0=0x5;
    66:  ADCON2=0X21;
    67: 
    68: }
    69: 
    70: char tempdeal()
    71: {  const char  heattab[255]={0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,
    72:                            6,6,6,7,7,7,8,8,8,9,9,0xa,0xa,0xb,0xb,0xc,0xc,
    73:                            0xd,0xd,0xe,0xe,0xf,0xf,0xf,0x10,0x10,0x10,
    74:                            0x11,0x11,0x12,0x12,0x12,0x13,0x13,0x14,0x14,0x14,
    75:                            0x15,0x15,0x15,0x16,0x16,0x16,0x17,0x17,0x18,0x18,
    76:                            0x19,0x19,0x1a,0x1a,0x1b,0x1b,0x1c,0x1c,0x1c,
    77:                            0x1d,0x1d,0x1d,0x1e,0x1e,0x1f,0x1f,0x20,0x20,
    78:                            0x21,0x21,0x22,0x22,0x23,0x23,0x24,0x24,0x25,0x25,
    79:                            0x26,0x26,0x27,0x28,0x29,0x29,0x2a,0x2a,0x2b,0x2b,
    80:                            0x2c,0x2d,0x2e,0x2f,0x30,0x32};
    81:   char temp;
    82:   ADGO=1;
    83:   while(ADGO)
    84:   ;
    85:   ADRESH-=0X3A;
    86:   temp=heattab[(ADRESH)];
    87:   return temp;
    88: }
    89: 
    90: void main()
    91: {const char ledtab[10]={0X3F,0X06,0X5B,0X4F,0X66,0X6D,0X7D,0X07,0X7F,0X6F };
    92: 
    93: char temp,temph,templ,led_data;
    94: 
    95: preled();
    96: iniheat();
    97: while(1)
    98: {
    99: temp=tempdeal();
   100: temph=temp/10;
   101: templ=temp%10;
   102: led_data=ledtab[templ];
   103: moniled(led_data);
   104: led_data=ledtab[temph];
   105: moniled(led_data);
   106: delay(65535);//1S延时
   107: delay(65535);
   108: }
   109: }
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