148 lines
2.9 KiB
C
148 lines
2.9 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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#include "timer.h"
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#ifdef PROTOCOL_LUFA
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#include "lufa.h"
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#endif
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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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/* Power down MCU with watchdog timer
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* wdto: watchdog timer timeout defined in <avr/wdt.h>
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* WDTO_15MS
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* WDTO_30MS
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* WDTO_60MS
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* WDTO_120MS
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* WDTO_250MS
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* WDTO_500MS
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* WDTO_1S
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* WDTO_2S
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* WDTO_4S
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* WDTO_8S
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*/
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static uint8_t wdt_timeout = 0;
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static void power_down(uint8_t wdto)
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{
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#ifdef PROTOCOL_LUFA
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if (USB_DeviceState == DEVICE_STATE_Configured) return;
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#endif
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wdt_timeout = wdto;
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// Watchdog Interrupt Mode
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wdt_intr_enable(wdto);
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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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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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}
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static void standby(void)
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{
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set_sleep_mode(SLEEP_MODE_STANDBY);
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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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}
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static void idle(void)
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{
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set_sleep_mode(SLEEP_MODE_IDLE);
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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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}
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void suspend_idle(uint8_t time)
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{
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idle();
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}
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void suspend_power_down(void)
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{
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#ifdef NO_SUSPEND_POWER_DOWN
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;
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#elif defined(SUSPEND_MODE_NOPOWERSAVE)
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;
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#elif defined(SUSPEND_MODE_STANDBY)
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standby();
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#elif defined(SUSPEND_MODE_IDLE)
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idle();
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#else
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power_down(WDTO_15MS);
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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_power_up();
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matrix_scan();
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matrix_power_down();
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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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matrix_clear();
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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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// compensate timer for sleep
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switch (wdt_timeout) {
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case WDTO_15MS:
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timer_count += 15 + 2; // WDTO_15MS + 2(from observation)
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break;
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default:
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;
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}
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}
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#endif
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