99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
#include <stdbool.h>
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#include <avr/sleep.h>
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#include <avr/wdt.h>
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#include <avr/interrupt.h>
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#include "matrix.h"
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#include "action.h"
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#include "backlight.h"
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#include "suspend_avr.h"
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#include "suspend.h"
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#define wdt_intr_enable(value) \
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__asm__ __volatile__ ( \
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"in __tmp_reg__,__SREG__" "\n\t" \
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"cli" "\n\t" \
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"wdr" "\n\t" \
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"sts %0,%1" "\n\t" \
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"out __SREG__,__tmp_reg__" "\n\t" \
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"sts %0,%2" "\n\t" \
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: /* no outputs */ \
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: "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
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"r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
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"r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
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_BV(WDIE) | (value & 0x07)) ) \
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: "r0" \
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)
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void suspend_power_down(void)
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{
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#ifdef BACKLIGHT_ENABLE
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backlight_set(0);
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#endif
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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 keyboard state
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clear_keyboard();
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#ifdef BACKLIGHT_ENABLE
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backlight_init();
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#endif
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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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