EDIT: pomogło ponowne wywołanie ustawie watchdoga przy wyjściu z Deepsleep'a
[syntax=c]#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#include <avr/wdt.h>
// Defined Pins
#define RED_LED_PIN PB4
#define YELLOW_LED_PIN PB3
#define GREEN_LED_PIN PB2
#define EXTRAGREEN_LED_PIN PB0
#define CHANGE_LED_STATUS(LED){PORTB = PORTB ^ (1 << LED);}
#define TURN_LED_ON(LED){PORTB = PORTB | (1 << LED);}
#define TURN_LED_OFF(LED){PORTB = PORTB & ~(1 << LED);}
volatile uint8_t LockMode = 0;// Locks INT0 - not used currently
volatile uint8_t TimesButtonWasPressed = 0;
volatile uint8_t push_key_debounce = 0;
volatile uint8_t push_key_pressed = 0;
char SecondsBeforeSleep = 5;//TODO make longer
volatile uint8_t WatchdogNoActionCount = 0;// Number Watchdog interrupt was called, used to calculate no action time
volatile uint8_t WentToSleep = 0;// Stores information if the uC was in sleeping mode
volatile uint8_t GoToSleepFlag = 0;// This variable hold information whether uC should go to deep sleep
/*
Resets watchdog
*/
void ResetWatchdog(void){
cli();
wdt_reset();
sei();
}
/*
Normal watchdog timeout - 125ms
*/
void NormalWatchdog(void){
cli();
wdt_reset();
WDTCR |= (1<<WDCE);// Watchdog change enable
WDTCR = (1<<WDP1) | (1<<WDP0);// Prescale timer to 125ms
WDTCR |= (1<<WDTIE);// Enable watchdog timer interrupts
sei();
}
/*
Sets INT0 mode to triggered by low level
Used only to wake up from power down
Only "level interrupt" allows waking up
*/
void INT0LowLevelInterrupt(void){
GIMSK |= (1 << INT0);// External Interrupt Request 0 Enable
MCUCR &= ~((1<<ISC01)|(1<<ISC00));// The low level on INT0 generates an interrupt request
}
/*
During normal operation INT0 can be disabled
*/
void DisableINT0(void){
GIMSK &= ~(1 << INT0);// Disable INT0 in GIMSK register
}
// Create setup method that disables ADC, Analog Comparator, Internal Reference Voltage and other no useful stuff
void Setup(void){
// Setup ports
DDRB = 0xFF & ~(1 << DDB1);// Set all to output, PORTB 1 (INT0) configured as input with pull-up
PORTB = 0x00 | (1 << PORTB1);// all other low
// Low power mode
ACSR &=~ (1<<ACD);// Disables Analog Comparator,
ADCSRA &=~ (1<<ADEN);// Make sure ADC is OFF
// Configure interrupts
INT0LowLevelInterrupt();// The low level on INT0 generates an interrupt request
GIMSK |= (1 << INT0);// External Interrupt Request 0 Enable
DisableINT0();// Disable INT0 for normal work
// Configure Watchdog
NormalWatchdog();
// Enable all interrupts
sei();// Enable interrupts
}
/*
Deep sleep, maximum power saving, onlu INT0 and watchdog can wake uC up
*/
void DeepSleep(void){
cli();// Disable all interrupts
wdt_disable();// Disable watchog
INT0LowLevelInterrupt();// Enable INT0 interrupt
set_sleep_mode(SLEEP_MODE_PWR_DOWN);// Set Power Down mode
sleep_enable();// Enable sleep
sei();// Enable all interrupts
WentToSleep = 1;// Notify, that uC is going to sleep
PORTB &= ~((1 << RED_LED_PIN) | (1 << YELLOW_LED_PIN) | (1 << GREEN_LED_PIN));//clear leds before going to sleep
sleep_cpu();// Go to sleep
sleep_disable();// After a wake up disable sleep
DisableINT0();// Disable INT0 for normal work
NormalWatchdog();// EDIT: setup watchdog again
}
/*
Short sleep using watchdog, should not alternate normal work of uC (pins statuses etc.)
*/
void ShortSleep(uint8_t numOfSeconds){
// TODO maybe decrease WatchdogCount should be in watchdog interrupt function, watchdog is allways running so...
uint16_t WatchdogCount = numOfSeconds*8;
while(WatchdogCount>0){// repeat n times
cli();// Disable all interrupts
set_sleep_mode(SLEEP_MODE_PWR_DOWN);// Set Power Down mode
sleep_enable();// Enable sleep
sei();// Enable all interrupts
sleep_cpu();// Go to sleep
sleep_disable();// After a wake up disable sleep
WatchdogCount--;
}
}
// Returns 1 if the cycles num is exceeded and thus the uC should go to sleep
unsigned char CyclesWithoutActionNumExceeded(void){
return (WatchdogNoActionCount >= SecondsBeforeSleep*8);//only in normal mode
}
unsigned char ButtonPressedDown(void){
return ((PINB & (1 << PINB1)) == 0);
}
/*
Interrupt 0
*/
ISR (INT0_vect){
cli();
WatchdogNoActionCount=0;// Reset WDT no action count - especially after waking up
GoToSleepFlag=0;// Reset GoToSleep flag
sei();
}
ISR (WDT_vect){
cli();
if(CyclesWithoutActionNumExceeded()==1 && GoToSleepFlag==0){
GoToSleepFlag = 1;
CHANGE_LED_STATUS(EXTRAGREEN_LED_PIN);
return;
};
if(ButtonPressedDown()==1)// button pressed down
{
WatchdogNoActionCount=0;// Reset WDT no action count
CHANGE_LED_STATUS(GREEN_LED_PIN);
if (push_key_debounce<8){ // we need this condition so variable wouldnt overrun to zero and go in circles
push_key_debounce++;
}
if(push_key_debounce==8) // we react after this number of stabilised push_key readings
push_key_pressed=1; // variable where we keep state of the push_key
TimesButtonWasPressed=0;// reset button status
}
else
{
CHANGE_LED_STATUS(YELLOW_LED_PIN);
if(push_key_debounce==8) //push_key is unpressed and previous state was pressed
{
// ACTION OFF
TURN_LED_OFF(RED_LED_PIN);
}
push_key_debounce=0; //push_key is unpressed or debounce noise is still in progress
WatchdogNoActionCount++;// No action is going on
}
//push_key action handler START
if(push_key_pressed==1) //push_key was pressed
{
push_key_pressed=0;
TURN_LED_ON(RED_LED_PIN);// ACTION ON
}
sei();
}
/*
Calls proper method
*/
void Operate(void){
while(1){
ShortSleep(1);
if(GoToSleepFlag==1) return;// Operate till cycles not exceeded and not in sleep mode
}
}
int main(void)
{
Setup();
//NORMAL LOOP
while (1)
{
Operate();// Dummy method
DeepSleep();// after loop is cancelled
};
}[/syntax]
Statystyki: Napisane przez teres — 19 lip 2015, o 22:01
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