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#include "suspend.h"
#include "matrix.h"
#include "action.h"
void suspend_power_down(void)
{
#ifndef NO_SUSPEND_POWER_DOWN
// Enable watchdog to wake from MCU sleep
cli();
wdt_reset();
// Watchdog Interrupt and System Reset Mode
//wdt_enable(WDTO_1S);
//WDTCSR |= _BV(WDIE);
// Watchdog Interrupt Mode
wdt_intr_enable(WDTO_120MS);
// TODO: more power saving
// See PicoPower application note
// - I/O port input with pullup
// - prescale clock
// - BOD disable
// - Power Reduction Register PRR
// sleep in power down mode
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
sleep_enable();
sei();
sleep_cpu();
sleep_disable();
// Disable watchdog after sleep
wdt_disable();
#endif
}
bool suspend_wakeup_condition(void)
{
matrix_scan();
for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
if (matrix_get_row(r)) return true;
}
return false;
}
// run immediately after wakeup
void suspend_wakeup_init(void)
{
// clear matrix and keyboard state
matrix_init();
clear_keyboard();
}
#ifndef NO_SUSPEND_POWER_DOWN
/* watchdog timeout */
ISR(WDT_vect)
{
/* wakeup from MCU sleep mode */
/*
// blink LED
static uint8_t led_state = 0;
static uint8_t led_count = 0;
led_count++;
if ((led_count & 0x07) == 0) {
led_set((led_state ^= (1<<USB_LED_CAPS_LOCK)));
}
*/
}
#endif
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