/** Initialise flash, disable watchdog, set up clocks. This and any
functions it calls must be for the C runtime startup to
work. */
void
mcu_init (void)
{
irq_id_t id;
int i;
EFC0->EEFC_FMR = EEFC_FMR_FWS (5);
/* Disable all interrupts to be sure when debugging. */
for (i = 0; i < 8; i++)
NVIC->ICER[i] = ~0;
mcu_reset_enable ();
/* Reduce the number of wait states for the flash memory. */
mcu_flash_init ();
mcu_watchdog_disable ();
mcu_clock_init ();
#if 0
/* Enable protect mode. */
AIC->AIC_DCR |= AIC_DCR_PROT;
/* Use MATRIX_WPMR ? */
#endif
irq_global_enable ();
}
/**
* @brief Initializer MCU during start-up
*/
void mcu_init(void)
{
mcu_clock_init();
/* Enable SRAM Data Retention */
DRTRAM0 = _BV(ENDRT);
DRTRAM1 = _BV(ENDRT);
DRTRAM2 = _BV(ENDRT);
DRTRAM3 = _BV(ENDRT);
}
void
mcu_power_mode_normal (void)
{
#if 0
/* TODO. */
/* Switch voltage regulator to normal mode. */
VREG->VREG_MR &= ~AT91C_VREG_PSTDBY;
#endif
mcu_clock_init ();
}
/**
* @brief Initialization of PAL
*
* This function initializes the PAL.
* This includes selecting the proper system clock source, initializing the
* GPIOs, the interface to the transceiver, and the timers.
*
* @return MAC_SUCCESS if PAL initialization is successful, FAILURE otherwise
*/
retval_t pal_init(void)
{
mcu_clock_init();
gpio_init();
trx_interface_init();
#ifdef CW_SUPPORTED
TST_INIT();
#endif
timer_init();
__watchdog_reset();
/* Clear WDRF in MCUSR */
MCUSR &= ~(1<<WDRF);
/* Write logical one to WDCE and WDE */
/* Keep old prescaler setting to prevent unintentional time-out
*/
WDTCSR |= (1<<WDCE) | (1<<WDE);
/* Turn off WDT */
WDTCSR = 0x00;
return MAC_SUCCESS;
}
