lab2.lst

PICC 16X Code for study and learning

     1: 
     2: /****************************************************************
     3: *                       Hi-Tech workshop exercise Lab2                                          *
     4: *****************************************************************
     5: * The program will display a binary count value on PORTD (LED)  *
     6: * every delay 200mS                                                                                             *
     7: *                                                                                                                               *
     8: *   Files required:                                                                                             *
     9: *                                                                                                                               *               
    10: *                   lab2.c                                                                              *
    11: *                                       MID_LCD.c                                                                       *
    12: *                   cnfig877a.h (Set the Configuration Word)    *
    13: *                                                                                                                               *
    14: *                   pic.h        (Hi-Tech file)                                 *
    15: *                                                                                                                               *
    16: *****************************************************************
    17: *                                                                                                                               *
    18: *   Notes:                                                                                                              *
    19: *                                                                                                                               *
    20: *   Device Fosc -> 16.00MHz (Clock supplied by target)                  *
    21: *                                                                                                                               *       
    22: *****************************************************************/
    23: 
    24: #include <pic.h>                                // processor if/def file
    25: #include "cnfig877a.h"
    26: #include "mid_lcd.h"
    27: 
    28: //**********************************
    29: //* Function Prototype Declaration
    30: //**********************************
    31: 
    32: 
    33: // ================================================================
    34: // **** Establish PIC16F877A Configuration Word
    35: // **** == HS Oscillator Mode
    36: // **** == Brown-Out Detect Enabled
    37: // **** == Watch-Dog Timer Off
    38: // **** == Code Protect Off
    39: // **** == Low Voltage Programming Off
    40: // **** == ICD2 Debug Mode On
    41: 
    42: __CONFIG  ( HS_OSC & BODEN_ON & WDT_OFF & CP_OFF & LVP_OFF & DEBUG_ON ); 
    43: 
    44: // =================================================================
    45: 
    46: 
    47: #define SW3     RA4
    48: #define SW2     RB0
    49: 
    50: const char LCD_Msg1[]="Hi-Tech PICC Ex2"; 
    51: const char LCD_Msg2[]=" Up:00  Down:00 "; 
    52: unsigned char i;
    53: unsigned char debounce=0;
    54: unsigned char Up_Count=0;
    55: unsigned char Down_Count=0;
    56: 
    57: /*****************************
    58:     INITIALIZE SYSTEM
    59: *****************************/
    60: 
    61: void Init_System(void)
    62: {
    63:         ADCON1=0b00000110;              // Disable A/D Function
    64:         TRISD=0x00;                             // Set PortD for Output
    65:         PORTD=0x80;                             // Initila LED display = 0x80
    66:         TRISA4=1;                               // Set SW2 for input
    67:         TRISE1=1;                               // Set SW6 for Input
    68: }
    69: 
    70: //***************************************
    71: //*             Program Main ( )                *
    72: //***************************************
    73: void main(void)
    74: {
    75:         Init_System();
    76:         OpenLCD();
    77:         LCD_Set_Cursor(0,0);
    78:         putrsLCD(LCD_Msg1);
    79:         LCD_Set_Cursor(0,1);
    80:         putrsLCD(LCD_Msg2);
    81: 
    82:         while(1)
    83:         {
    84:                 if (debounce==0)
    85:                         {
    86:                                 if (!SW3) 
    87:                                         {
    88:                                         PORTD++;
    89:                                         LCD_Set_Cursor(4,1);
    90:                                         puthexLCD(++Up_Count);
    91:                                         debounce=30;
    92:                                         }
    93:                                 if (!SW2) 
    94:                                         {
    95:                                         PORTD--;
    96:                                         LCD_Set_Cursor(13,1);
    97:                                         puthexLCD(--Down_Count);
    98:                                         debounce=30;
    99:                                         }
   100:                         }
   101:                 else
   102:                         {
   103:                                 if (SW3 & SW2) 
   104:                                         {
   105:                                         debounce--;
   106:                                         for (i=0;i<50;i++);
   107:                                         }
   108:                                 else 
   109:                                         debounce=30;    
   110:                         }                
   111:         }
   112:         
   113: }
   114: 
   115: