// reading twice costs us 28 bytes, but improves reliability.
// The root problem is when the charge value goes from <128 to >768 (or the
// reverse, from topping off), it passes through the middle range. If we
// read at the wrong time, we can get a BATTERY value while we are still
// plugged in.
// Reading twice with a sufficient delay, we can guarantee that our state is correct.
unsigned char hexbright::get_definite_charge_state() {
unsigned char val1 = get_charge_state();
delayMicroseconds(50); // wait a little in case the value was changing
unsigned char val2 = get_charge_state();
// BATTERY & CHARGING = CHARGING, BATTERY & CHARGED = CHARGED, CHARGED & CHARGING = CHARGING
// In essence, only return the middle value (BATTERY) if two reads report the same thing.
return val1 & val2;
}
void hexbright::print_charge(unsigned char led) {
unsigned char charge_state = get_charge_state();
if(charge_state == CHARGING && get_led_state(led) == LED_OFF) {
set_led(led, 350, 350);
} else if (charge_state == CHARGED) {
set_led(led,50);
}
}
void hexbright::init_hardware() {
// These next 8 commands are for reference and cost nothing,
// as we are initializing the values to their default state.
pinModeFast(DPIN_PWR, OUTPUT);
digitalWriteFast(DPIN_PWR, LOW);
pinModeFast(DPIN_RLED_SW, INPUT);
pinModeFast(DPIN_GLED, OUTPUT);
pinModeFast(DPIN_DRV_MODE, OUTPUT);
pinModeFast(DPIN_DRV_EN, OUTPUT);
digitalWriteFast(DPIN_DRV_MODE, LOW);
digitalWriteFast(DPIN_DRV_EN, LOW);
#if (DEBUG!=DEBUG_OFF)
// Initialize serial busses
Serial.begin(9600);
Wire.begin();
Serial.println("DEBUG MODE ON");
#endif
#if (DEBUG!=DEBUG_OFF && DEBUG!=DEBUG_PRINT)
if(DEBUG==DEBUG_LIGHT) {
// do a full light range sweep, (printing all light intensity info)
set_light(0,1000,update_delay*1002);
} else if (DEBUG==DEBUG_TEMP) {
set_light(0, MAX_LEVEL, NOW);
} else if (DEBUG==DEBUG_LOOP) {
// note the use of TIME_MS/update_delay.
set_light(0, MAX_LEVEL, 2500/update_delay);
}
#ifdef FREE_RAM
Serial.print("Ram available: ");
Serial.print(freeRam());
Serial.println("/1024 bytes");
#endif
#ifdef FLASH_CHECKSUM
Serial.print("Flash checksum: ");
Serial.println(flash_checksum());
#endif
#endif // DEBUG!=DEBUG_OFF
#ifdef ACCELEROMETER
enable_accelerometer();
#endif
// was this power on from battery? if so, it was a button press, even if it was too fast to register.
read_charge_state();
if(get_charge_state()==BATTERY)
press_button();
continue_time = micros();
}
void hexbright::init_hardware() {
// These next 8 commands are for reference and cost nothing,
// as we are initializing the values to their default state.
pinModeFast(DPIN_PWR, OUTPUT);
digitalWriteFast(DPIN_PWR, LOW);
pinModeFast(DPIN_RLED_SW, INPUT);
pinModeFast(DPIN_GLED, OUTPUT);
pinModeFast(DPIN_DRV_MODE, OUTPUT);
pinModeFast(DPIN_DRV_EN, OUTPUT);
digitalWriteFast(DPIN_DRV_MODE, LOW);
digitalWriteFast(DPIN_DRV_EN, LOW);
#if (DEBUG!=DEBUG_OFF)
// Initialize serial busses
Serial.begin(9600);
Wire.begin();
Serial.println("DEBUG MODE ON");
#endif
#if (DEBUG!=DEBUG_OFF && DEBUG!=DEBUG_PRINT)
#ifdef FREE_RAM
Serial.print("Ram available: ");
Serial.print(freeRam());
Serial.println("/1024 bytes");
#endif
#ifdef FLASH_CHECKSUM
Serial.print("Flash checksum: ");
Serial.println(flash_checksum());
#endif
#endif //(DEBUG!=DEBUG_OFF && DEBUG!=DEBUG_PRINT)
#ifdef ACCELEROMETER
enable_accelerometer();
#endif
// was this power on from battery? if so, it was a button press, even if it was too fast to register.
read_charge_state();
if(get_charge_state()==BATTERY)
press_button();
continue_time = micros();
}
void hexbright::read_avr_voltage() {
band_gap_reading = read_adc(APIN_BAND_GAP);
if(get_charge_state()==BATTERY)
lowest_band_gap_reading = band_gap_reading < lowest_band_gap_reading ? band_gap_reading : lowest_band_gap_reading;
}
