/* This function initializes the Hardware Abstraction Layer.
*
*/
void radio_hal_init(void)
{
/*IO Specific Initialization.*/
DDR_SLP_TR |= (1 << SLP_TR); //Enable SLP_TR as output.
DDR_RST |= (1 << RST); //Enable RST as output.
radio_spi_init();
radiol_enable_trx_interrupt(); //Enable interrupts from the radio transceiver.
}
void do_sampling(void) {
/* ADC LR Clock on P0[2], rising edge is trigger */
LPC_IOCON->PIO0_2 &= ~0x07; /* GPIO */
LPC_GPIO0->MASKED_ACCESS[1<<2] = (0<<2); /* Low to start */
LPC_GPIO0->DIR |= (1<<2); /* Output */
/* Setup SPI for the ADC transfer */
wm8737_spi_init();
wm8737_spi_on();
/**
* Disable all interrupts - Be careful that the watchdog
* calibration timer doesn't occur during this period
*/
__disable_irq();
/* We need to use a function pointer to jump our execution to RAM */
sampling_func sampling_ptr = sampling;
/* Prepare for the sampling loop */
sampling_index = 0;
/* Let RAM accesses settle down before we jump */
__NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP();
__NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP();
__NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP(); __NOP();
/* Actually take the sample */
sampling_ptr();
LPC_GPIO0->MASKED_ACCESS[1<<2] = (1<<2); /* P0[2] = ADCLRCLK */
/* Tidy up from the sampling run */
spi_flush();
/* Re-enable all interrupts */
__enable_irq();
/* Return the SPI to how it was before */
wm8737_spi_off();
/**
* Revert the SPI bus to working for the radio.
*/
radio_spi_init();
}
void nodeSleep(u16 tenthSeconds)
{
// ************** Power down the other board peripherals
Leds_off();
// ************** Power down the radio
// wait for radio to be done
u8 state = BUSY_TX_ARET;
while (state == BUSY_TX_ARET ||
state == BUSY_RX_AACK)
state = radioGetTrxState();
// Now put radio to sleep
radioEnterSleepMode();
// TODO: figure out what needs to be put to sleep to minimize current consumption
// ************** Power down the on-chip modules
// PRR = 0xbf; ???
// Disable ADC
// ADCSRA &= ~(1 << ADEN);
// Turn off comparator
// ACSR |= (1 <<
// turn off ports etc
// Turn off BOD
// This should only be done once -- No need to do it over again
/*
AVR_ENTER_CRITICAL_REGION();
#define BODS 6
#define BODSE 5
MCUCR |= (1 << BODSE) | (1<< BODS);
MCUCR &= ~(1 << BODSE);
AVR_LEAVE_CRITICAL_REGION();
*/
// ************** Set the timer to wake up
// Set TIMER2 Asyncronous Mode.
ASSR |= (1 << AS2);
// Set TIMER2 Prescaler to 1024.
TCCR2B |= ((1 << CS22)|(1 << CS21)|(1 << CS20));
// Wait for TCNT2 write to finish.
while(ASSR & (1 << TCR2BUB))
;
// Sleep as many times as needed to sleep for the full time
while (tenthSeconds)
{
// This is to get the node manually out of sleeping mode --
// Might take up to 7.5Sec to detect button press
//
if (BUTTON_PRESSED() )
{
Led1_on();
macConfig.sleeping = false;
while (BUTTON_PRESSED())
;
Led1_off();
break; // exit the Sleeping loop
}
// Set TIMER2 output compare register from user.
if (tenthSeconds > 75)
{
// Just decrement by the max timeout
OCR2A = 240; // 7.5 seconds, max timeout
tenthSeconds -= 75;
}
else
{
// Can measure the remaining time in one timer cycle
tenthSeconds = tenthSeconds * 16 / 5;
if (!tenthSeconds)
tenthSeconds++;
OCR2A = tenthSeconds;
tenthSeconds = 0;
}
// Wait for OCR2 write to finish.
while(ASSR & (1 << OCR2AUB))
;
// Reset TIMER2 timer counter value.
TCNT2 = 0;
// Wait for TCNT2 write to finish before entering sleep.
while(ASSR & (1 << TCN2UB))
;
// Clear interrupt flag
TIFR2 |= (1 << OCF2A);
// Enable TIMER2 output compare interrupt.
TIMSK2 |= (1 << OCIE2A);
// ************** Go to sleep
AVR_ENTER_CRITICAL_REGION();
set_sleep_mode( SLEEP_MODE_PWR_SAVE);
sleep_enable();
sei();
sleep_cpu(); // sleeping right here
sleep_disable();
AVR_LEAVE_CRITICAL_REGION();
wdt_disable();
}
// ************** Awake now, wake up everything
// PRR = 0x03; ??
if (SERIAL)
serial_init(NULL);
debugMsgStr("\r\nNode slept");
if ( macConfig.associated)
HAL_ADC_INIT();
// Bring SPI port back up (must re-init after sleep)
radio_spi_init();
// Wake up radio.
radioLeaveSleepMode();
// Set RF212 to 250KB mode.
// TODO: do I need to call this??
//radioSetup900();
radioSetTrxState(PLL_ON);
}
