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Add power down mode sleep and watchdog interrupt

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This commit is contained in:
tmk 2013-03-14 22:45:02 +09:00
parent c8cfde0138
commit 42f6ff0886
1 changed files with 72 additions and 2 deletions
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74
protocol/lufa/lufa.c
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@ -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)));
}
}