diff options
| -rw-r--r-- | protocol/lufa/lufa.c | 76 |
1 files changed, 73 insertions, 3 deletions
diff --git a/protocol/lufa/lufa.c b/protocol/lufa/lufa.c index fc3798cdf..556d0aeec 100644 --- a/protocol/lufa/lufa.c +++ b/protocol/lufa/lufa.c @@ -133,7 +133,15 @@ static void Console_Task(void) /******************************************************************************* * USB Events ******************************************************************************/ +/* + * Event Order of Plug in: + * 0) EVENT_USB_Device_Connect + * 1) EVENT_USB_Device_Suspend + * 2) EVENT_USB_Device_Reset + * 3) EVENT_USB_Device_Wake +*/ #include "led.h" +#include "matrix.h" void EVENT_USB_Device_Connect(void) { } @@ -148,11 +156,16 @@ void EVENT_USB_Device_Reset(void) void EVENT_USB_Device_Suspend() { - led_set(1<<USB_LED_CAPS_LOCK); } +#include "action.h" void EVENT_USB_Device_WakeUp() { + // initialize + matrix_init(); + clear_keyboard(); + + // turn off LED led_set(0); } @@ -490,6 +503,24 @@ static bool wakeup_condition(void) return false; } +#include <avr/sleep.h> +#include <avr/wdt.h> +#define wdt_intr_enable(value) \ +__asm__ __volatile__ ( \ + "in __tmp_reg__,__SREG__" "\n\t" \ + "cli" "\n\t" \ + "wdr" "\n\t" \ + "sts %0,%1" "\n\t" \ + "out __SREG__,__tmp_reg__" "\n\t" \ + "sts %0,%2" "\n\t" \ + : /* no outputs */ \ + : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \ + "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \ + "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \ + _BV(WDIE) | (value & 0x07)) ) \ + : "r0" \ +) + int main(void) __attribute__ ((weak)); int main(void) { @@ -499,9 +530,36 @@ int main(void) sei(); while (1) { + // while suspend while (USB_DeviceState == DEVICE_STATE_Suspended) { - // TODO: power saving - + // 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(); + + // Send request of USB Wakeup from Suspend to host if (USB_Device_RemoteWakeupEnabled) { if (wakeup_condition()) { USB_Device_SendRemoteWakeup(); @@ -516,3 +574,15 @@ int main(void) #endif } } + +/* watchdog timeout during sleep */ +ISR(WDT_vect) +{ + // 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))); + } +} |