vmeter_18.lst

在picdemo2实验板上的一款lcd+adc程序

     1: #include <pic18.h>
     2: #include "HD44780.h"
     3: 
     4: const char own[]={
     5: /*ri*/0x2E,0x2A,0x2A,0x2E,0x2A,0x2A,0x2E,0x20,  
     6: /*yue*/0x2E,0x2A,0x2E,0x2A,0x2E,0x2A,0x36,0x20,
     7: /*nian*/0x28,0x2F,0x32,0x2F,0x2A,0x3F,0x22,0x20,
     8: };
     9: 
    10: unsigned char volts[]="0.00";           //0.00
    11: const char *string="U=0.00V";           //U=0.00V
    12: const char   *warn=" WARN!";                    //WARN!
    13: const char *normal="NORMAL";            //NORMAL
    14: 
    15: unsigned int V=8,Old_V=0;
    16: bit step;
    17: 
    18: void Display(void)
    19: {
    20:         volts[0]=V/1000;
    21:         volts[2]=(V-volts[0]*1000)/100;
    22:         volts[3]=(V-volts[0]*1000-volts[2]*100)/10;
    23:         
    24:         volts[0]|=0x30;
    25:         volts[2]|=0x30;
    26:         volts[3]|=0x30;
    27:         
    28:         volts[1]='.';
    29:         
    30:         PutString(1,3,volts);
    31:                         
    32:         return;
    33: }
    34: 
    35: void main(void)
    36: {
    37:         TRISA0=1;
    38:         TRISB=0x01;
    39:         TRISE0=0;
    40:         
    41:         LCD_Begin(MODE_4BIT);
    42: 
    43:         ADCON0=0x41;
    44:         ADCON1=0x8e;
    45:         
    46:         SetChar(3,own);
    47:         
    48:         PutString(1,1,string);  
    49:         PutString(2,3,"2005\xa\x30\x32\x09\x32\x31\x8");
    50:                 
    51:         while(1)
    52:         {
    53:                 GODONE=1;
    54:                 while(GODONE==1){;}
    55:                         
    56:                 Old_V=V;
    57:                 
    58:                 V=((ADRESH<<8)+ADRESL)*4.91;
    59:                 
    60:                 if(Old_V!=V)Display();
    61:                 
    62:                 if(V>3500)
    63:                 {
    64:                         PORTB=~PORTB;
    65:                         if(step=!step)PutString(1,10,warn);
    66:                         else PutString(1,10,"      ");
    67:                         RE0=0;
    68:                 }
    69:                 else
    70:                 {
    71:                         PORTB=0;
    72:                         PutString(1,10,normal);
    73:                         RE0=1;
    74:                 }
    75:                 
    76:                 DelayS(1);
    77:         }
    78:         
    79:         return;
    80: }
    81:                 
    82:         
    83: