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