uint8_t
lis302dl_init(void)
{
power_twi_enable();
i2c_init();
//configure ports
LIS302_INT1_DDR &= ~(LIS302_INT1_POS);
LIS302_INT1_PORT &= ~(LIS302_INT1_POS);
LIS302_INT2_DDR &= ~(LIS302_INT2_POS);
LIS302_INT2_PORT &= ~(LIS302_INT2_POS);
uint8_t who_am_i = 0;
who_am_i = lis302_read_register(LIS302_REGISTER_WHO_AM_I);
if (LIS302_WHO_AM_I_VALUE != who_am_i)
{
return -1;
}
//set active & enable axis
uint8_t ctrl_reg_value = _BV(7) | _BV(6) | _BV(2) | _BV(1) | _BV(0);
lis302_write_register(LIS302_REGISTER_CTRL_REG_1, ctrl_reg_value);
uint8_t reg_value = lis302_read_register(LIS302_REGISTER_CTRL_REG_1);
if (reg_value != ctrl_reg_value)
{
return -1;
}
else
{
return 0;
}
}
void i2c_start()
{
// Enable I2C
power_twi_enable();
TWBR = TWI_BR; // Datasheet says to re-initialize after waking up
// START
TWCR = _BV(TWINT)|_BV(TWSTA)|_BV(TWEN);
// Wait for START
loop_until_bit_is_set(TWCR, TWINT);
}
/* Configure the pins on the ATmega328p */
void InitDevice() {
/* Disable all possible devices on the board */
power_all_disable();
/* LCD setup */
/* All PORTB pins are data pins for the LCD screen */
DDRB = (uint8_t)(-1);
/* PDO, PD1, and PD3 are all used as control pins for the LCD screen.
* PD0 is used as the R/S pin, which determines whether the LCD is getting a
* command or a character
* PD1 is the Enable pin, which signals the LCD to read the data pins
* PD3 is the R/W Pin which is used to activate the Busy flag on the LCD and
* is used for timing
*/
DDRD |= (_BV(PD0) | _BV(PD1) | _BV(PD3));
LcdInit();
/* Display title screen */
LcdWriteString(TITLE, LCD_LINE_ONE);
LcdWriteString(NAME, LCD_LINE_TWO);
_delay_ms(STARTUP_DELAY);
LcdWriteString(BOOTUP, LCD_LINE_TWO);
/* Calibration circuit */
/* PD4 is used to determine if the calibration circuit is active or not */
DDRD &= ~_BV(PD4); /* Configure PD4 as an input */
PORTD |= _BV(PD4); /* Pullup PD4 */
/* Configure the ADC */
//Currently not implemented
//power_adc_enable();
/* Magnetometer set up */
/* INT0 is attached to the DataReady pin on the magnometer, and will be used
* to signal that data is ready to be read (obviously). INT0 is set to go
* off on a rising edge.
*/
EIMSK |= _BV(INT0);
EICRA |= _BV(ISC01) | _BV(ISC00);
/* Configure TWI */
power_twi_enable();
TWCR = _BV(TWEN); /* Enable TWI */ //May not be needed here, but definitely elsewhere
//Check to see if the magnetometer needs initialization from the ATmega
//will need init
//Display "Waiting on data" on line 2
}
/*********************************************************************************************************
** Function name: wakeUp
** Descriptions: wakeUp
*********************************************************************************************************/
void xadow::wakeUp()
{
#if defined(__AVR_ATmega32U4__)
power_adc_enable();
power_usart0_enable();
power_spi_enable();
power_twi_enable();
power_timer1_enable();
power_timer2_enable();
power_timer3_enable();
power_usart1_enable();
power_usb_enable();
#endif
}
void twiInit (uint8_t address, uint8_t mask)
{
power_twi_enable () ; delay (1) ;
TWSR = 0 ;
TWBR = 0 ;
TWAR = address << 1 ;
TWAMR = mask << 1 ;
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) ;
twiStop () ;
twiReleaseBus () ;
#ifdef DEBUG_TWI_LED
digitalWrite (DEBUG_TWI_LED, 0) ;
#endif
}
void Low_Power::idle(Period_t period, ADC_t adc,
Timer4_t timer4, Timer3_t timer3,
Timer1_t timer1, Timer0_t timer0,
SPI_t spi, USART1_t usart1, TWI_t twi, usb_t usb)
{
if (adc == ADC_OFF)
{
ADCSRA &= ~(1 << ADEN);
power_adc_disable();
}
if (timer4 == TIMER4_OFF) power_timer4_disable();
if (timer3 == TIMER3_OFF) power_timer3_disable();
if (timer1 == TIMER1_OFF) power_timer1_disable();
if (timer0 == TIMER0_OFF) power_timer0_disable();
if (spi == SPI_OFF) power_spi_disable();
if (usart1 == USART1_OFF) power_usart1_disable();
if (twi == TWI_OFF) power_twi_disable();
if (usb == USB_OFF) power_usb_disable();
if (period != SLEEP_FOREVER)
{
wdt_enable(period);
WDTCSR |= (1 << WDIE);
}
lowPowerBodOn(SLEEP_MODE_IDLE);
if (adc == ADC_OFF)
{
power_adc_enable();
ADCSRA |= (1 << ADEN);
}
if (timer4 == TIMER4_OFF) power_timer4_enable();
if (timer3 == TIMER3_OFF) power_timer3_enable();
if (timer1 == TIMER1_OFF) power_timer1_enable();
if (timer0 == TIMER0_OFF) power_timer0_enable();
if (spi == SPI_OFF) power_spi_enable();
if (usart1 == USART1_OFF) power_usart1_enable();
if (twi == TWI_OFF) power_twi_enable();
if (usb == USB_OFF) power_usb_enable();
}
void Low_Power::idle(Period_t period, ADC_t adc, Timer5_t timer5,
Timer4_t timer4, Timer3_t timer3, Timer2_t timer2,
Timer1_t timer1, Timer0_t timer0, SPI_t spi,
USART3_t usart3, USART2_t usart2, USART1_t usart1,
USART0_t usart0, TWI_t twi)
{
// Temporary clock source variable
unsigned char clockSource = 0;
if (timer2 == TIMER2_OFF)
{
if (TCCR2B & CS22) clockSource |= (1 << CS22);
if (TCCR2B & CS21) clockSource |= (1 << CS21);
if (TCCR2B & CS20) clockSource |= (1 << CS20);
// Remove the clock source to shutdown Timer2
TCCR2B &= ~(1 << CS22);
TCCR2B &= ~(1 << CS21);
TCCR2B &= ~(1 << CS20);
power_timer2_disable();
}
if (adc == ADC_OFF)
{
ADCSRA &= ~(1 << ADEN);
power_adc_disable();
}
if (timer5 == TIMER5_OFF) power_timer5_disable();
if (timer4 == TIMER4_OFF) power_timer4_disable();
if (timer3 == TIMER3_OFF) power_timer3_disable();
if (timer1 == TIMER1_OFF) power_timer1_disable();
if (timer0 == TIMER0_OFF) power_timer0_disable();
if (spi == SPI_OFF) power_spi_disable();
if (usart3 == USART3_OFF) power_usart3_disable();
if (usart2 == USART2_OFF) power_usart2_disable();
if (usart1 == USART1_OFF) power_usart1_disable();
if (usart0 == USART0_OFF) power_usart0_disable();
if (twi == TWI_OFF) power_twi_disable();
if (period != SLEEP_FOREVER)
{
wdt_enable(period);
WDTCSR |= (1 << WDIE);
}
lowPowerBodOn(SLEEP_MODE_IDLE);
if (adc == ADC_OFF)
{
power_adc_enable();
ADCSRA |= (1 << ADEN);
}
if (timer2 == TIMER2_OFF)
{
if (clockSource & CS22) TCCR2B |= (1 << CS22);
if (clockSource & CS21) TCCR2B |= (1 << CS21);
if (clockSource & CS20) TCCR2B |= (1 << CS20);
power_timer2_enable();
}
if (timer5 == TIMER5_OFF) power_timer5_enable();
if (timer4 == TIMER4_OFF) power_timer4_enable();
if (timer3 == TIMER3_OFF) power_timer3_enable();
if (timer1 == TIMER1_OFF) power_timer1_enable();
if (timer0 == TIMER0_OFF) power_timer0_enable();
if (spi == SPI_OFF) power_spi_enable();
if (usart3 == USART3_OFF) power_usart3_enable();
if (usart2 == USART2_OFF) power_usart2_enable();
if (usart1 == USART1_OFF) power_usart1_enable();
if (usart0 == USART0_OFF) power_usart0_enable();
if (twi == TWI_OFF) power_twi_enable();
}
/*******************************************************************************
* Name: idle
* Description: Putting microcontroller into idle state. Please make sure you
* understand the implication and result of disabling module.
*
* Argument Description
* ========= ===========
* 1. period Duration of low power mode. Use SLEEP_FOREVER to use other wake
* up resource:
* (a) SLEEP_15MS - 15 ms sleep
* (b) SLEEP_30MS - 30 ms sleep
* (c) SLEEP_60MS - 60 ms sleep
* (d) SLEEP_120MS - 120 ms sleep
* (e) SLEEP_250MS - 250 ms sleep
* (f) SLEEP_500MS - 500 ms sleep
* (g) SLEEP_1S - 1 s sleep
* (h) SLEEP_2S - 2 s sleep
* (i) SLEEP_4S - 4 s sleep
* (j) SLEEP_8S - 8 s sleep
* (k) SLEEP_FOREVER - Sleep without waking up through WDT
*
* 2. adc ADC module disable control:
* (a) ADC_OFF - Turn off ADC module
* (b) ADC_ON - Leave ADC module in its default state
*
* 3. timer2 Timer 2 module disable control:
* (a) TIMER2_OFF - Turn off Timer 2 module
* (b) TIMER2_ON - Leave Timer 2 module in its default state
*
* 4. timer1 Timer 1 module disable control:
* (a) TIMER1_OFF - Turn off Timer 1 module
* (b) TIMER1_ON - Leave Timer 1 module in its default state
*
* 5. timer0 Timer 0 module disable control:
* (a) TIMER0_OFF - Turn off Timer 0 module
* (b) TIMER0_ON - Leave Timer 0 module in its default state
*
* 6. spi SPI module disable control:
* (a) ADC_OFF - Turn off ADC module
* (b) ADC_ON - Leave ADC module in its default state
*
* 7. usart0 USART0 module disable control:
* (a) USART0_OFF - Turn off USART0 module
* (b) USART0_ON - Leave USART0 module in its default state
*
* 8. twi TWI module disable control:
* (a) TWI_OFF - Turn off TWI module
* (b) TWI_ON - Leave TWI module in its default state
*
*******************************************************************************/
void LowPowerClass::idle(period_t period, adc_t adc, timer2_t timer2,
timer1_t timer1, timer0_t timer0,
spi_t spi, usart0_t usart0, twi_t twi)
{
// Temporary clock source variable
unsigned char clockSource = 0;
if (timer2 == TIMER2_OFF)
{
if (TCCR2B & CS22) clockSource |= (1 << CS22);
if (TCCR2B & CS21) clockSource |= (1 << CS21);
if (TCCR2B & CS20) clockSource |= (1 << CS20);
// Remove the clock source to shutdown Timer2
TCCR2B &= ~(1 << CS22);
TCCR2B &= ~(1 << CS21);
TCCR2B &= ~(1 << CS20);
power_timer2_disable();
}
if (adc == ADC_OFF)
{
ADCSRA &= ~(1 << ADEN);
power_adc_disable();
}
if (timer1 == TIMER1_OFF) power_timer1_disable();
if (timer0 == TIMER0_OFF) power_timer0_disable();
if (spi == SPI_OFF) power_spi_disable();
if (usart0 == USART0_OFF) power_usart0_disable();
if (twi == TWI_OFF) power_twi_disable();
if (period != SLEEP_FOREVER)
{
wdt_enable(period);
WDTCSR |= (1 << WDIE);
}
lowPowerBodOn(SLEEP_MODE_IDLE);
if (adc == ADC_OFF)
{
power_adc_enable();
ADCSRA |= (1 << ADEN);
}
if (timer2 == TIMER2_OFF)
{
if (clockSource & CS22) TCCR2B |= (1 << CS22);
if (clockSource & CS21) TCCR2B |= (1 << CS21);
if (clockSource & CS20) TCCR2B |= (1 << CS20);
power_timer2_enable();
}
if (timer1 == TIMER1_OFF) power_timer1_enable();
if (timer0 == TIMER0_OFF) power_timer0_enable();
if (spi == SPI_OFF) power_spi_enable();
if (usart0 == USART0_OFF) power_usart0_enable();
if (twi == TWI_OFF) power_twi_enable();
}
// Shutdown
void bg_pwr_down()
{
// execute sleep routine
if (bg_pwr_exec_sleep_routine_flag)
{
if (bg_pwr_on_sleep != NULL)
bg_pwr_on_sleep();
// the flag is needed because we want to execute sleep
// routine only when we go from pwr up to pwr down
bg_pwr_exec_sleep_routine_flag = 0;
}
//Shut off ADC, TWI, SPI, Timer0, Timer1, Timer2
ADCSRA &= ~(1<<ADEN); //Disable ADC
ACSR |= (1<<ACD); //Disable the analog comparator
DIDR0 = 0xFF; //Disable digital input buffers on all ADC0-ADC5 pins
DIDR1 = (1<<AIN1D)|(1<<AIN0D); //Disable digital input buffer on AIN1/0
power_twi_disable();
power_spi_disable();
power_usart0_disable();
power_timer0_disable();
power_timer1_disable();
power_timer2_disable();
#if defined(__AVR_ATmega1284P__)
power_timer3_disable();
#endif
//Power down various bits of hardware to lower power usage
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
sleep_mode();
/*********/
/* SLEEP */
/*********/
// The processor wakes up back here after interrupt
//Turn on ADC, TWI, SPI, Timer0, Timer1, Timer2
ADCSRA |= (1<<ADEN); // Enable ADC
ACSR &= ~(1<<ACD); // Enable the analog comparator
// this should be set to reflect real usage of analog pins
DIDR0 = 0x00; // Enable digital input buffers on all ADC0-ADC5 pins
DIDR1 &= ~(1<<AIN1D)|(1<<AIN0D); // Enable digital input buffer on AIN1/0
power_twi_enable();
power_spi_enable();
power_usart0_enable();
power_timer0_enable();
power_timer1_enable();
power_timer2_enable();
#if defined(__AVR_ATmega1284P__)
power_timer3_enable();
#endif
// check button press time and handle state
unsigned long start = millis();
while ( (ellapsed_millis(start) < BG_PWR_BUTTON_TIME) && (digitalRead(bg_pwr_switch_pin) == HIGH) );
// if the button is pressed continuously for 2 seconds, swap to on state
if (ellapsed_millis(start) >= BG_PWR_BUTTON_TIME)
bg_pwr_state = BG_STATE_PWR_UP;
// lower the button flag
bg_pwr_button_pressed_flag = 0;
// execute wake up routine only if we really woke up
if (bg_pwr_state == BG_STATE_PWR_UP || sd_reader_interrupted)
{
// execute wake up routine if any is defined
if (bg_pwr_on_wakeup != NULL)
bg_pwr_on_wakeup();
// next time we sleep execute sleep routine
bg_pwr_exec_sleep_routine_flag = 1;
}
}
void i2c_poweron(i2c_t dev)
{
assert(dev < I2C_NUMOF);
(void) dev;
power_twi_enable();
}