A SIMPLE APPLICATION FOR PIC18F87J10: led.c Source File

00001 /*********************************************************
00002 * Function: led driver
00003 * using RJ0,RJ1,RJ2,RJ3 for led display
00004 *
00005 * File: led.c
00006 * Author: Book Chen
00007 * Date 2009.07.06
00008 ***********************************************************
00009 */
00010 #include "includes.h"
00011 
00012 #define LedIdleState 0
00013 #define Led0OnState  1
00014 #define Led1OnState  2
00015 #define Led2OnState  3
00016 #define Led3OnState  4
00017 #define Led4OnState  5
00018 #define Led5OnState  6
00019 
00020 #define Led0 RJ0
00021 #define Led1 RJ1
00022 #define Led2 RJ2
00023 #define Led3 RJ3
00024 
00025 LED_CONTROL LedCtrl;
00026 /*****************
00027 * LedInit:
00028 * Initialize led variables
00029 ******************
00030 */
00031 void LedInit(void){
00032     Led0=LED_OFF;
00033     Led1=LED_OFF;
00034     Led2=LED_OFF;
00035     Led3=LED_OFF;
00036     LedCtrl.State=Led0OnState;
00037     LedCtrl.Timer=100;
00038 }
00039 /*****************
00040 * LedSvc:(LedIsr)
00041 * Initialize led variables
00042 ******************
00043 */
00044 void LedSvc(void){
00045 //void LedIsr(void){
00046     if(LedCtrl.State==LedIdleState) return;
00047     if(LedCtrl.Timer!=0) return;
00048     switch(LedCtrl.State){
00049         case LedIdleState:
00050             break;
00051         case Led0OnState:
00052             Led0=LED_ON;
00053             Led1=LED_OFF;
00054             Led2=LED_OFF;
00055             Led3=LED_OFF;
00056             LedCtrl.Timer=50;
00057             LedCtrl.State=Led1OnState;
00058             break;
00059         case Led1OnState:
00060             Led0=LED_OFF;
00061             Led1=LED_ON;
00062             Led2=LED_OFF;
00063             Led3=LED_OFF;
00064             LedCtrl.Timer=20;
00065             LedCtrl.State=Led2OnState;
00066             break;
00067         case Led2OnState:
00068             Led0=LED_OFF;
00069             Led1=LED_OFF;
00070             Led2=LED_ON;
00071             Led3=LED_OFF;
00072             LedCtrl.Timer=20;
00073             LedCtrl.State=Led3OnState;
00074             break;
00075         case Led3OnState:
00076             Led0=LED_OFF;
00077             Led1=LED_OFF;
00078             Led2=LED_OFF;
00079             Led3=LED_ON;
00080             LedCtrl.Timer=50;
00081             LedCtrl.State=Led4OnState;
00082             break;
00083         case Led4OnState:
00084             Led0=LED_OFF;
00085             Led1=LED_OFF;
00086             Led2=LED_ON;
00087             Led3=LED_OFF;
00088             LedCtrl.Timer=20;
00089             LedCtrl.State=Led5OnState;
00090             break;
00091         case Led5OnState:
00092             Led0=LED_OFF;
00093             Led1=LED_ON;
00094             Led2=LED_OFF;
00095             Led3=LED_OFF;
00096             LedCtrl.Timer=20;
00097             LedCtrl.State=Led0OnState;
00098             break;
00099    }
00100 }
00101 
00102 void LedStop(void){ 
00103     LedCtrl.State=LedIdleState;
00104 }
00105 
00106 void LedStart(void){
00107     LedCtrl.State=Led0OnState;
00108 }