/***************************************************************************

Flicker.c

****************************************************************************/

#include "Flicker.h"

/*-------------------------- Module Constants -----------------------------*/

/*------------------------- Module Definitions ----------------------------*/

/*-------------------------- Module Variables -----------------------------*/

static char startCmd; //flicker start input status (button debouncing)

static char activeOn; //keeps track of whether or not the active LEDs are on

static char failOn; //keeps track of whether or not the fail LEDs are on

static unsigned long lastButtonTime; //timing variable for button debouncing

static unsigned long lastBlinkFailTime; //timing variable for blinking fail LEDs

static unsigned long lastBlinkActiveTime; //timing variable for blinking active LEDs

/*-------------------------- Module Functions -----------------------------*/

static void wait(unsigned int); //blocking code that waits for a specified number of ms

/*---------------------------- Module Code --------------------------------*/

void initFlicker(void) {

turnOnActive(0); //At startup, turn off Active and Fail LEDs

turnOnFail(0);

lastButtonTime = TMRS12_GetTime(); //Update all timer variables with the current time

lastBlinkActiveTime = lastButtonTime;

lastBlinkFailTime = lastButtonTime;

startCmd = !(PTT & BIT0HI); //read FLICKER start input (high = off, low = on)

}

FLICKER_EVENT_t checkFlickerEvents(void){

unsigned long myTime = 0;

myTime = TMRS12_GetTime();

//update start input if 5 ms has passed (button debouncing)

if ((myTime - lastButtonTime) > 5) {

lastButtonTime = myTime;

startCmd = !(PTT & BIT0HI);

}

if (startCmd) {

return FLICKER_START;

}

else {

return FLICKER_NO_EVENT;

}

}

//Activate next FLICKER by sending 12mA for 50ms - 100ms

void startNextFlicker(void){

PTT = PTT | BIT1HI; //set output hi

wait(75);

PTT = PTT & BIT1LO;

}

//Control Active LEDs

void turnOnActive(char myActiveOn) {

activeOn = myActiveOn;

if (myActiveOn)

PTM = PTM | BIT3HI; //turn Active LEDs on

else

PTM = PTM & BIT3LO; //turn Active LEDs off

}

//Blink Active LEDs

void blinkActive(int timeToWait) {

unsigned int myTime = TMRS12_GetTime();

if ((myTime - lastBlinkActiveTime) > timeToWait) {

lastBlinkActiveTime = myTime; //update blink timing variable

turnOnActive(!activeOn); //turn on LEDs if they were off and vise versa

}

}

//Control Fail LEDs

void turnOnFail(char myFailOn) {

failOn = myFailOn;

if (myFailOn)

PTM = PTM | BIT2HI; //turn Fail LEDs on

else

PTM = PTM & BIT2LO; //turn Fail LEDs off

}

//Blink Fail LEDs during failure

void blinkFail(int timeToWait) {

unsigned int myTime = TMRS12_GetTime();

if ((myTime - lastBlinkFailTime) > timeToWait) {

lastBlinkFailTime = myTime; //update blink timing variable

if (failOn) //turn on LEDs if they were off and turn them off if they were on

turnOnFail(0);

else

turnOnFail(1);

}

}

//delay for a specified number of ms

static void wait(unsigned int ms) {

unsigned int myTime = 0;

myTime = TMRS12_GetTime();

//wait until the current time minus the start time is greater than the wait time

while ((TMRS12_GetTime() - myTime) < ms) {};

}