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作成日 11 年前差分は期限切れになりません

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*Settings to modify per driver

#define F_CPU 4800000UL

* =========================================================================

* Settings to modify per driver

#define VOLTAGE_MON // Comment out to disable

#define MODE_MOON 1 // Can comment out to remove mode, but should be set through soldering stars

#define MODE_MOON 8 // Can comment out to remove mode, but should be set through soldering stars

#define MODE_1 8 // Can comment out to remove mode

#define MODE_LOW 14 // Can comment out to remove mode

#define MODE_2 75 // Can comment out to remove mode

#define MODE_MED 39 // Can comment out to remove mode

#define MODE_HIGH_W_TURBO 110 // MODE_HIGH value when turbo is enabled

#define MODE_HIGH 120 // Can comment out to remove mode

#define MODE_TURBO 255 // Can comment out to remove mode

#define TURBO_TIMEOUT 37 // How many WTD ticks before before dropping down (.5 sec each)

#define TURBO_TIMEOUT 240 // How many WTD ticks before before dropping down (.5 sec each)

#define WDT_TIMEOUT 2 // Number of WTD ticks before mode is saved (.5 sec each)

#define ADC_LOW 130 // When do we start ramping

#define ADC_CRIT 120 // When do we shut the light off

* =========================================================================

#ifdef MODE_TURBO

#undef MODE_HIGH

#define MODE_HIGH MODE_HIGH_W_TURBO

#endif

//#include <avr/pgmspace.h>

#include <avr/io.h>

#include <util/delay.h>

#include <avr/interrupt.h>

#include <avr/wdt.h>

#include <avr/eeprom.h>

#include <avr/sleep.h>

//#include <avr/power.h>

#define STAR2_PIN PB0

#define STAR3_PIN PB4

#define STAR4_PIN PB3

#define PWM_PIN PB1

#define VOLTAGE_PIN PB2

#define ADC_CHANNEL 0x01 // MUX 01 corresponds with PB2

#define ADC_DIDR ADC1D // Digital input disable bit corresponding with PB2

#define ADC_PRSCL 0x06 // clk/64

#define PWM_LVL OCR0B // OCR0B is the output compare register for PB1

* global variables

// Mode storage

uint8_t eepos = 0;

uint8_t eep[32];

uint8_t memory = 0;

// Modes (gets set when the light starts up based on stars)

static uint8_t modes[10]; // Don't need 10, but keeping it high enough to handle all

volatile uint8_t mode_idx = 0;

int mode_dir = 0; // 1 or -1. Determined when checking stars. Do we increase or decrease the idx when moving up to a higher mode.

uint8_t mode_cnt = 0;

uint8_t lowbatt_cnt = 0;

void store_mode_idx(uint8_t lvl) { //central method for writing (with wear leveling)

uint8_t oldpos=eepos;

eepos=(eepos+1)&31; //wear leveling, use next cell

// Write the current mode

EEARL=eepos; EEDR=lvl; EECR=32+4; EECR=32+4+2; //WRITE //32:write only (no erase) 4:enable 2:go

while(EECR & 2); //wait for completion

// Erase the last mode

EEARL=oldpos; EECR=16+4; EECR=16+4+2; //ERASE //16:erase only (no write) 4:enable 2:go

}

inline void read_mode_idx() {

eeprom_read_block(&eep, 0, 32);

while((eep[eepos] == 0xff) && (eepos < 32)) eepos++;

if (eepos < 32) mode_idx = eep[eepos];//&0x10; What the?

else eepos=0;

}

inline void next_mode() {

if (mode_idx == 0 && mode_dir == -1) {

// Wrap around

mode_idx = mode_cnt - 1;

} else {

mode_idx += mode_dir;

if (mode_idx > (mode_cnt - 1)) {

// Wrap around

mode_idx = 0;

}

inline void WDT_on() {

// Setup watchdog timer to only interrupt, not reset, every 500ms.

cli(); // Disable interrupts

wdt_reset(); // Reset the WDT

WDTCR |= (1<<WDCE) | (1<<WDE); // Start timed sequence

WDTCR = (1<<WDTIE) | (1<<WDP2) | (1<<WDP0); // Enable interrupt every 500ms

sei(); // Enable interrupts

}

inline void WDT_off()

{

cli(); // Disable interrupts

wdt_reset(); // Reset the WDT

MCUSR &= ~(1<<WDRF); // Clear Watchdog reset flag

WDTCR |= (1<<WDCE) | (1<<WDE); // Start timed sequence

WDTCR = 0x00; // Disable WDT

sei(); // Enable interrupts

}

inline void ADC_on() {

ADMUX = (1 << REFS0) | (1 << ADLAR) | ADC_CHANNEL; // 1.1v reference, left-adjust, ADC1/PB2

DIDR0 |= (1 << ADC_DIDR); // disable digital input on ADC pin to reduce power consumption

ADCSRA = (1 << ADEN ) | (1 << ADSC ) | ADC_PRSCL; // enable, start, prescale

}

inline void ADC_off() {

ADCSRA &= ~(1<<7); //ADC off

}

#ifdef VOLTAGE_MON

uint8_t low_voltage(uint8_t voltage_val) {

// Start conversion

ADCSRA |= (1 << ADSC);

// Wait for completion

while (ADCSRA & (1 << ADSC));

// See if voltage is lower than what we were looking for

if (ADCH < voltage_val) {

// See if it's been low for a while

if (++lowbatt_cnt > 8) {

lowbatt_cnt = 0;

return 1;

}

} else {

lowbatt_cnt = 0;

}

return 0;

}

#endif

ISR(WDT_vect) {

static uint8_t ticks = 0;

if (ticks < 255) ticks++;

if (ticks == WDT_TIMEOUT) {

if (memory) {

store_mode_idx(mode_idx);

} else {

// Reset the mode to the start for next time

store_mode_idx((mode_dir == 1) ? 0 : (mode_cnt - 1));

}

#ifdef MODE_TURBO

//} else if (ticks == TURBO_TIMEOUT && modes[mode_idx] == MODE_TURBO) { // Doesn't make any sense why this doesn't work

} else if (ticks == TURBO_TIMEOUT && mode_idx == (mode_cnt - 1)) {

// Turbo mode is always at end

PWM_LVL =185;

PWM_LVL = modes[--mode_idx];

#endif

}

int main(void)

{

// All ports default to input, but turn pull-up resistors on for the stars (not the ADC input! Made that mistake already)

PORTB = (1 << STAR2_PIN) | (1 << STAR3_PIN) | (1 << STAR4_PIN);

// Set PWM pin to output

DDRB = (1 << PWM_PIN);

// Set timer to do PWM for correct output pin and set prescaler timing

TCCR0A = 0x21; // phase corrected PWM is 0x21 for PB1, fast-PWM is 0x23

TCCR0A = 0x23; // phase corrected PWM is 0x21 for PB1, fast-PWM is 0x23

TCCR0B = 0x01; // pre-scaler for timer (1 => 1, 2 => 8, 3 => 64...)

// Turn features on or off as needed

#ifdef VOLTAGE_MON

ADC_on();

#else

ADC_off();

#endif

ACSR |= (1<<7); //AC off

// Load up the modes based on stars

// Always load up the modes array in order of lowest to highest mode

// 0 being low for soldered, 1 for pulled-up for not soldered

// Moon (stock is 1 then 0)

// Moon

#ifdef MODE_MOON

if ((PINB & (1 << STAR2_PIN))> 0) { // Stock is ==, ( > for moon default to on, soldering star will disable moon)

if ((PINB & (1 << STAR2_PIN)) == 0) {

modes[mode_cnt++] = MODE_MOON;

}

#endif

#ifdef MODE_1

#ifdef MODE_LOW

modes[mode_cnt++] = MODE_1;

modes[mode_cnt++] = MODE_LOW;

#endif

#ifdef MODE_2

#ifdef MODE_MED

modes[mode_cnt++] = MODE_2;

modes[mode_cnt++] = MODE_MED;

#endif

#ifdef MODE_HIGH

modes[mode_cnt++] = MODE_HIGH;

#endif

#ifdef MODE_TURBO

modes[mode_cnt++] = MODE_TURBO;

#endif

if ((PINB & (1 << STAR3_PIN)) == 0) {

// High to Low

mode_dir = -1;

} else {

mode_dir = 1;

}

// Not soldered (1) should disable memory

// Not soldered (1) should enable memory

memory = ((PINB & (1 << STAR4_PIN)) > 0 ) ? 0 : 1; //to disable momory without soldering star use ? 0: 1; (stock is ? 1 : 0;)

memory = ((PINB & (1 << STAR4_PIN)) > 0) ? 1 : 0;

// Enable sleep mode set to Idle that will be triggered by the sleep_mode() command.

// Will allow us to go idle between WDT interrupts

set_sleep_mode(SLEEP_MODE_IDLE);

// Determine what mode we should fire up

// Read the last mode that was saved

read_mode_idx();

if (mode_idx&0x10) {

// Indicates we did a short press last time, go to the next mode

// Remove short press indicator first

mode_idx &= 0x0f;

next_mode(); // Will handle wrap arounds

} else {

// Didn't have a short press, keep the same mode

}

// Store mode with short press indicator

store_mode_idx(mode_idx|0x10);

WDT_on();

// Now just fire up the mode

PWM_LVL = modes[mode_idx];

uint8_t i = 0;

uint8_t hold_pwm;

while(1) {

#ifdef VOLTAGE_MON

if (low_voltage(ADC_LOW)) {

// We need to go to a lower level

if (mode_idx == 0 && PWM_LVL <= modes[mode_idx]) {

// Can't go any lower than the lowest mode

// Wait until we hit the critical level before flashing 10 times and turning off

while (!low_voltage(ADC_CRIT));

i = 0;

while (i++<10) {

PWM_LVL = 0;

_delay_ms(250);

PWM_LVL = modes[0];

_delay_ms(500);

}

// Turn off the light

PWM_LVL = 0;

// Disable WDT so it doesn't wake us up

WDT_off();

// Power down as many components as possible

set_sleep_mode(SLEEP_MODE_PWR_DOWN);

sleep_mode();

} else {

// Flash 3 times before lowering

hold_pwm = PWM_LVL;

i = 0;

while (i++<3) {

PWM_LVL = 0;

_delay_ms(250);

PWM_LVL = hold_pwm;

_delay_ms(500);

}

// Lower the mode by half, but don't go below lowest level

if ((PWM_LVL >> 1) < modes[0]) {

PWM_LVL = modes[0];

mode_idx = 0;

} else {

PWM_LVL = (PWM_LVL >> 1);

}

// See if we should change the current mode level if we've gone under the current mode.

if (PWM_LVL < modes[mode_idx]) {

// Lower our recorded mode

mode_idx--;

}

// Wait 3 seconds before lowering the level again

_delay_ms(3000);

}

#endif

sleep_mode();

}

return 0; // Standard Return Code

}

保存された差分

原文

ファイルを開く

*Settings to modify per driver
 */

#define VOLTAGE_MON			// Comment out to disable

#define MODE_MOON			1	// Can comment out to remove mode, but should be set through soldering stars
#define MODE_1			    8  // Can comment out to remove mode
#define MODE_2			    75	// Can comment out to remove mode
#define MODE_TURBO			255	// Can comment out to remove mode
#define TURBO_TIMEOUT		37 // How many WTD ticks before before dropping down (.5 sec each)

#define WDT_TIMEOUT			2	// Number of WTD ticks before mode is saved (.5 sec each)

#define ADC_LOW				130	// When do we start ramping
#define ADC_CRIT			120 // When do we shut the light off

/*
 * =========================================================================
 */

#ifdef MODE_TURBO
#undef  MODE_HIGH
#define MODE_HIGH	MODE_HIGH_W_TURBO
#endif

//#include <avr/pgmspace.h>
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>	
#include <avr/eeprom.h>
#include <avr/sleep.h>
//#include <avr/power.h>

#define STAR2_PIN   PB0
#define STAR3_PIN   PB4
#define STAR4_PIN   PB3
#define PWM_PIN     PB1
#define VOLTAGE_PIN PB2
#define ADC_CHANNEL 0x01	// MUX 01 corresponds with PB2
#define ADC_DIDR 	ADC1D	// Digital input disable bit corresponding with PB2
#define ADC_PRSCL   0x06	// clk/64

#define PWM_LVL		OCR0B	// OCR0B is the output compare register for PB1

/*
 * global variables
 */

// Mode storage
uint8_t eepos = 0;
uint8_t eep[32];
uint8_t memory = 0;

// Modes (gets set when the light starts up based on stars)
static uint8_t modes[10];  // Don't need 10, but keeping it high enough to handle all
volatile uint8_t mode_idx = 0;
int     mode_dir = 0; // 1 or -1. Determined when checking stars. Do we increase or decrease the idx when moving up to a higher mode.
uint8_t mode_cnt = 0;

uint8_t lowbatt_cnt = 0;

void store_mode_idx(uint8_t lvl) {  //central method for writing (with wear leveling)
	uint8_t oldpos=eepos;
	eepos=(eepos+1)&31;  //wear leveling, use next cell
	// Write the current mode
	EEARL=eepos;  EEDR=lvl; EECR=32+4; EECR=32+4+2;  //WRITE  //32:write only (no erase)  4:enable  2:go
	while(EECR & 2); //wait for completion
	// Erase the last mode
	EEARL=oldpos;           EECR=16+4; EECR=16+4+2;  //ERASE  //16:erase only (no write)  4:enable  2:go
}
inline void read_mode_idx() {
	eeprom_read_block(&eep, 0, 32);
	while((eep[eepos] == 0xff) && (eepos < 32)) eepos++;
	if (eepos < 32) mode_idx = eep[eepos];//&0x10; What the?
	else eepos=0;
}

inline void next_mode() {
	if (mode_idx == 0 && mode_dir == -1) {
		// Wrap around
		mode_idx = mode_cnt - 1;
	} else {
		mode_idx += mode_dir;
		if (mode_idx > (mode_cnt - 1)) {
			// Wrap around
			mode_idx = 0;
		}
	}
}

inline void WDT_on() {
	// Setup watchdog timer to only interrupt, not reset, every 500ms.
	cli();							// Disable interrupts
	wdt_reset();					// Reset the WDT
	WDTCR |= (1<<WDCE) | (1<<WDE);  // Start timed sequence
	WDTCR = (1<<WDTIE) | (1<<WDP2) | (1<<WDP0); // Enable interrupt every 500ms
	sei();							// Enable interrupts
}

inline void WDT_off()
{
	cli();							// Disable interrupts
	wdt_reset();					// Reset the WDT
	MCUSR &= ~(1<<WDRF);			// Clear Watchdog reset flag
	WDTCR |= (1<<WDCE) | (1<<WDE);  // Start timed sequence
	WDTCR = 0x00;					// Disable WDT
	sei();							// Enable interrupts
}

inline void ADC_on() {
	ADMUX  = (1 << REFS0) | (1 << ADLAR) | ADC_CHANNEL; // 1.1v reference, left-adjust, ADC1/PB2
    DIDR0 |= (1 << ADC_DIDR);							// disable digital input on ADC pin to reduce power consumption
	ADCSRA = (1 << ADEN ) | (1 << ADSC ) | ADC_PRSCL;   // enable, start, prescale
}

inline void ADC_off() {
	ADCSRA &= ~(1<<7); //ADC off
}

#ifdef VOLTAGE_MON
uint8_t low_voltage(uint8_t voltage_val) {
	// Start conversion
	ADCSRA |= (1 << ADSC);
	// Wait for completion
	while (ADCSRA & (1 << ADSC));
	// See if voltage is lower than what we were looking for
	if (ADCH < voltage_val) {
		// See if it's been low for a while
		if (++lowbatt_cnt > 8) {
			lowbatt_cnt = 0;
			return 1;
		}
	} else {
		lowbatt_cnt = 0;
	}
	return 0;
}
#endif

ISR(WDT_vect) {
	static uint8_t ticks = 0;
	if (ticks < 255) ticks++;
	
	if (ticks == WDT_TIMEOUT) {
		if (memory) {
			store_mode_idx(mode_idx);
		} else {
			// Reset the mode to the start for next time
			store_mode_idx((mode_dir == 1) ? 0 : (mode_cnt - 1));
		}
#ifdef MODE_TURBO	
	//} else if (ticks == TURBO_TIMEOUT && modes[mode_idx] == MODE_TURBO) { // Doesn't make any sense why this doesn't work
	} else if (ticks == TURBO_TIMEOUT && mode_idx == (mode_cnt - 1)) {
		// Turbo mode is always at end
		PWM_LVL =185;
#endif
	}

}

int main(void)
{	
	// All ports default to input, but turn pull-up resistors on for the stars (not the ADC input!  Made that mistake already)
	PORTB = (1 << STAR2_PIN) | (1 << STAR3_PIN) | (1 << STAR4_PIN);
	
    // Set PWM pin to output
    DDRB = (1 << PWM_PIN);

// Set timer to do PWM for correct output pin and set prescaler timing
    TCCR0A = 0x21; // phase corrected PWM is 0x21 for PB1, fast-PWM is 0x23
    TCCR0B = 0x01; // pre-scaler for timer (1 => 1, 2 => 8, 3 => 64...)
	
	// Turn features on or off as needed
	#ifdef VOLTAGE_MON
	ADC_on();
	#else
	ADC_off();
	#endif
	ACSR   |=  (1<<7); //AC off
	
	// Load up the modes based on stars
	// Always load up the modes array in order of lowest to highest mode
	// 0 being low for soldered, 1 for pulled-up for not soldered
	// Moon (stock is 1 then 0)
	#ifdef MODE_MOON
	if ((PINB & (1 << STAR2_PIN))> 0)  {    // Stock is ==, ( > for moon default to on, soldering star will disable moon) 
		modes[mode_cnt++] = MODE_MOON;
	}
	#endif
	#ifdef MODE_1
	modes[mode_cnt++] = MODE_1;
	#endif
	#ifdef MODE_2
	modes[mode_cnt++] = MODE_2;
	#endif
	#ifdef MODE_TURBO
	modes[mode_cnt++] = MODE_TURBO;
	#endif
	if ((PINB & (1 << STAR3_PIN)) == 0) {
		// High to Low
		mode_dir = -1;
	} else {
		mode_dir = 1;
	}
	// Not soldered (1) should disable memory
    memory = ((PINB & (1 << STAR4_PIN)) > 0 ) ? 0 : 1;   //to disable momory without soldering star use ? 0: 1; (stock is ? 1 : 0;)
	
	// Enable sleep mode set to Idle that will be triggered by the sleep_mode() command.
	// Will allow us to go idle between WDT interrupts
	set_sleep_mode(SLEEP_MODE_IDLE);
	
	// Determine what mode we should fire up
	// Read the last mode that was saved
	read_mode_idx();
	if (mode_idx&0x10) {
		// Indicates we did a short press last time, go to the next mode
		// Remove short press indicator first
		mode_idx &= 0x0f;
		next_mode(); // Will handle wrap arounds
	} else {
		// Didn't have a short press, keep the same mode
	}
	// Store mode with short press indicator
	store_mode_idx(mode_idx|0x10);
	
	WDT_on();
	
	// Now just fire up the mode
	PWM_LVL = modes[mode_idx];
	
	uint8_t i = 0;
	uint8_t hold_pwm;
	while(1) {
	#ifdef VOLTAGE_MON
		if (low_voltage(ADC_LOW)) {
			// We need to go to a lower level
			if (mode_idx == 0 && PWM_LVL <= modes[mode_idx]) {
				// Can't go any lower than the lowest mode
				// Wait until we hit the critical level before flashing 10 times and turning off
				while (!low_voltage(ADC_CRIT));
				i = 0;
				while (i++<10) {
					PWM_LVL = 0;
					_delay_ms(250);
					PWM_LVL = modes[0];
					_delay_ms(500);
				}
				// Turn off the light
				PWM_LVL = 0;
				// Disable WDT so it doesn't wake us up
				WDT_off();
				// Power down as many components as possible
				set_sleep_mode(SLEEP_MODE_PWR_DOWN);
				sleep_mode();
			} else {
				// Flash 3 times before lowering
				hold_pwm = PWM_LVL;
				i = 0;
				while (i++<3) {
					PWM_LVL = 0;
					_delay_ms(250);
					PWM_LVL = hold_pwm;
					_delay_ms(500);
				}
				// Lower the mode by half, but don't go below lowest level
				if ((PWM_LVL >> 1) < modes[0]) {
					PWM_LVL = modes[0];
					mode_idx = 0;
				} else {					
					PWM_LVL = (PWM_LVL >> 1);
				}					
				// See if we should change the current mode level if we've gone under the current mode.
				if (PWM_LVL < modes[mode_idx]) {
					// Lower our recorded mode
					mode_idx--;
				}
			}
			// Wait 3 seconds before lowering the level again
			_delay_ms(3000);
		}
	#endif
		sleep_mode();
	}

return 0; // Standard Return Code
}

変更されたテキスト

ファイルを開く

#define F_CPU 4800000UL

/*
 * =========================================================================
 * Settings to modify per driver
 */

#define VOLTAGE_MON			// Comment out to disable

#define MODE_MOON			8	// Can comment out to remove mode, but should be set through soldering stars
#define MODE_LOW			14  // Can comment out to remove mode
#define MODE_MED			39	// Can comment out to remove mode
#define MODE_HIGH_W_TURBO	110	// MODE_HIGH value when turbo is enabled
#define MODE_HIGH			120	// Can comment out to remove mode
#define MODE_TURBO			255	// Can comment out to remove mode
#define TURBO_TIMEOUT		240 // How many WTD ticks before before dropping down (.5 sec each)

#define WDT_TIMEOUT			2	// Number of WTD ticks before mode is saved (.5 sec each)

#define ADC_LOW				130	// When do we start ramping
#define ADC_CRIT			120 // When do we shut the light off

/*
 * =========================================================================
 */

#ifdef MODE_TURBO
#undef  MODE_HIGH
#define MODE_HIGH	MODE_HIGH_W_TURBO
#endif

//#include <avr/pgmspace.h>
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>	
#include <avr/eeprom.h>
#include <avr/sleep.h>
//#include <avr/power.h>

#define PWM_LVL		OCR0B	// OCR0B is the output compare register for PB1

/*
 * global variables
 */

// Mode storage
uint8_t eepos = 0;
uint8_t eep[32];
uint8_t memory = 0;

uint8_t lowbatt_cnt = 0;

inline void ADC_off() {
	ADCSRA &= ~(1<<7); //ADC off
}

}

// Set timer to do PWM for correct output pin and set prescaler timing
    TCCR0A = 0x23; // phase corrected PWM is 0x21 for PB1, fast-PWM is 0x23
    TCCR0B = 0x01; // pre-scaler for timer (1 => 1, 2 => 8, 3 => 64...)
	
	// Turn features on or off as needed
	#ifdef VOLTAGE_MON
	ADC_on();
	#else
	ADC_off();
	#endif
	ACSR   |=  (1<<7); //AC off
	
	// Load up the modes based on stars
	// Always load up the modes array in order of lowest to highest mode
	// 0 being low for soldered, 1 for pulled-up for not soldered
	// Moon
	#ifdef MODE_MOON
	if ((PINB & (1 << STAR2_PIN)) == 0) {
		modes[mode_cnt++] = MODE_MOON;
	}
	#endif
	#ifdef MODE_LOW
	modes[mode_cnt++] = MODE_LOW;
	#endif
	#ifdef MODE_MED
	modes[mode_cnt++] = MODE_MED;
	#endif
	#ifdef MODE_HIGH
	modes[mode_cnt++] = MODE_HIGH;
	#endif
	#ifdef MODE_TURBO
	modes[mode_cnt++] = MODE_TURBO;
	#endif
	if ((PINB & (1 << STAR3_PIN)) == 0) {
		// High to Low
		mode_dir = -1;
	} else {
		mode_dir = 1;
	}
	// Not soldered (1) should enable memory
	memory = ((PINB & (1 << STAR4_PIN)) > 0) ? 1 : 0;
	
	// Enable sleep mode set to Idle that will be triggered by the sleep_mode() command.
	// Will allow us to go idle between WDT interrupts
	set_sleep_mode(SLEEP_MODE_IDLE);
	
	// Determine what mode we should fire up
	// Read the last mode that was saved
	read_mode_idx();
	if (mode_idx&0x10) {
		// Indicates we did a short press last time, go to the next mode
		// Remove short press indicator first
		mode_idx &= 0x0f;
		next_mode(); // Will handle wrap arounds
	} else {
		// Didn't have a short press, keep the same mode
	}
	// Store mode with short press indicator
	store_mode_idx(mode_idx|0x10);
	
	WDT_on();
	
	// Now just fire up the mode
	PWM_LVL = modes[mode_idx];
	
	uint8_t i = 0;
	uint8_t hold_pwm;
	while(1) {
	#ifdef VOLTAGE_MON
		if (low_voltage(ADC_LOW)) {
			// We need to go to a lower level
			if (mode_idx == 0 && PWM_LVL <= modes[mode_idx]) {
				// Can't go any lower than the lowest mode
				// Wait until we hit the critical level before flashing 10 times and turning off
				while (!low_voltage(ADC_CRIT));
				i = 0;
				while (i++<10) {
					PWM_LVL = 0;
					_delay_ms(250);
					PWM_LVL = modes[0];
					_delay_ms(500);
				}
				// Turn off the light
				PWM_LVL = 0;
				// Disable WDT so it doesn't wake us up
				WDT_off();
				// Power down as many components as possible
				set_sleep_mode(SLEEP_MODE_PWR_DOWN);
				sleep_mode();
			} else {
				// Flash 3 times before lowering
				hold_pwm = PWM_LVL;
				i = 0;
				while (i++<3) {
					PWM_LVL = 0;
					_delay_ms(250);
					PWM_LVL = hold_pwm;
					_delay_ms(500);
				}
				// Lower the mode by half, but don't go below lowest level
				if ((PWM_LVL >> 1) < modes[0]) {
					PWM_LVL = modes[0];
					mode_idx = 0;
				} else {					
					PWM_LVL = (PWM_LVL >> 1);
				}					
				// See if we should change the current mode level if we've gone under the current mode.
				if (PWM_LVL < modes[mode_idx]) {
					// Lower our recorded mode
					mode_idx--;
				}
			}
			// Wait 3 seconds before lowering the level again
			_delay_ms(3000);
		}
	#endif
		sleep_mode();
	}

return 0; // Standard Return Code
}