lab1.lst

PICC 16X Code for study and learning

     1: 
     2: 
     3: /****************************************************************
     4: *                       Hi-Tech workshop exercise Lab1                                          *
     5: *****************************************************************
     6: * The program will display a binary count value on PORTD (LED)  *
     7: * every delay 200mS                                                                                             *
     8: *                                                                                                                               *
     9: *   Files required:                                                                                             *
    10: *                                                                                                                               *               
    11: *                   lab1.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: 
    27: //**********************************
    28: //* Function Prototype Declaration
    29: //**********************************
    30: void Init_System(void);
    31: void Delay_x_mS(int);
    32: void Delay_1mS(void);
    33: 
    34: // ================================================================
    35: // **** Establish PIC16F877A Configuration Word
    36: // **** == HS Oscillator Mode
    37: // **** == Brown-Out Detect Enabled
    38: // **** == Watch-Dog Timer Off
    39: // **** == Code Protect Off
    40: // **** == Low Voltage Programming Off
    41: // **** == ICD2 Debug Mode On
    42: 
    43: __CONFIG  ( HS_OSC & BODEN_ON & WDT_OFF & CP_OFF & LVP_OFF & DEBUG_ON ); 
    44: 
    45: // =================================================================
    46: 
    47: /*****************************
    48:     INITIALIZE SYSTEM
    49: *****************************/
    50: 
    51: void Init_System(void)
    52: {
    53:         PORTD = 0x00;                           // Initialize PORTD latch states
    54:         TRISD = 0x00;                           // set PORTD as outputs
    55: };
    56: 
    57: //*********************************
    58: //*    Delay Routine with 16MHz
    59: //*********************************
    60: 
    61: void Delay_x_mS( int N_mS )
    62: {
    63:                 int     Loop_mS ;
    64:                 
    65:                 for ( Loop_mS = 0 ; Loop_mS < N_mS ; Loop_mS++ ) 
    66:                 {
    67:                         Delay_1mS();            
    68:                 }
    69:                  
    70: }
    71: 
    72: //*** Delay 1mS with 16MHz crystal
    73: 
    74: void Delay_1mS(void)
    75: {
    76:                 int Del_1mS;
    77: 
    78:                 for (Del_1mS = 0 ; Del_1mS < 199 ; Del_1mS ++ )
    79:                 {
    80:                         asm("nop");
    81:                         asm("nop");
    82:                 }
    83: }
    84:         
    85: /*******************************************************************
    86:                   MAIN PROGRAM BEGINS HERE
    87: ********************************************************************/
    88: 
    89: void main( void )
    90: {
    91:         Init_System();                          // Initialize System Function and Variables
    92: 
    93:         while(1)                                        // Infinite loop
    94:         {
    95:                 Delay_x_mS(200);                // Delay 200mS
    96:                 PORTD++;                                // Increment PortD
    97:         };
    98: }