main.c File Reference

ATMega48PA power consumption main program file. More...

#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <avr/sleep.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <util/delay.h>

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Defines
#define	F_CPU   1000000UL
Functions
void	ASYNC_Init (void)
	Init0 init.
void	Disable_RTC (void)
	Disable RTC.
	ISR (INT0_vect)
	Init0 interrupt.
void	LED_Init (void)
	Blink LED.
void	LOWPOWER_Init (void)
	This is the low power init routine.
int	main (void)
	This is the main routine.
void	RTC_Init (void)
	Enable RTC.
Variables
uint8_t	gState = 0
	Global variable to keep track of which state the program is in.
volatile bool	run = false

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Detailed Description

ATMega48PA power consumption main program file.

This file contains a simple program for measuring the current consumption of the ATmega48PA on the picoPower board in Active,Idle, Power save and Power down modes.

Application note:

AVR32917: picoPower board

Documentation

For comprehensive code documentation, supported compilers, compiler settings and supported devices see readme.html

Author:

Atmel Corporation: http://www.atmel.com
Support email: avr@atmel.com

Copyright (c) 2008, Atmel Corporation All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. The name of ATMEL may not be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Definition in file main.c.

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Define Documentation

#define F_CPU   1000000UL

Definition at line 62 of file main.c.

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Function Documentation

void ASYNC_Init

(

void

)

Init0 init.

Definition at line 127 of file main.c.

Referenced by main().

{
    EICRA = 0x0;
    EIMSK |= (1 << INT0);
}

void Disable_RTC

(

void

)

Disable RTC.

Definition at line 107 of file main.c.

Referenced by main().

{
    ASSR &= ~(1<<AS2);
    PRR |= (1 << PRTIM2 );
}

ISR

(

INT0_vect

)

Init0 interrupt.

This ISR simpl updates run flag and wake up chip

Definition at line 209 of file main.c.

References run.

{
    run = true;
}

void LED_Init

(

void

)

Blink LED.

Definition at line 116 of file main.c.

Referenced by main().

{
    DDRC  |= (1 << PINC1) | (1 << PINC2) | (1 << PINC3) | (1 << PINC4); 
    PORTC |= (1 << PINC1) | (1 << PINC2) | (1 << PINC3) | (1 << PINC4);  
    _delay_ms( 500 ); 
    PORTC &= ~((1 << PINC1) | (1 << PINC2) | (1 << PINC3) | (1 << PINC4));  
}

void LOWPOWER_Init

(

void

)

This is the low power init routine.

Definition at line 75 of file main.c.

Referenced by main().

{
    wdt_disable();
    sleep_bod_disable();

    PRR = (1 << PRTWI) | (1 << PRTIM2 ) | (1 << PRTIM1 ) | \
          (1 << PRTIM0 ) | (1 << PRSPI ) | (1 << PRUSART0 ) | (1 << PRADC ) ; 
  
    /* set pin input and pull up */
    DDRB = 0x00;
    PORTB = 0xFF;
    DDRC = 0x00;
    PORTC = 0xFF;
    DDRD = 0x00;
    PORTD = 0xFF;
    /* Disable digital input */
    DIDR1 = (1 << AIN1D) | (1 << AIN0D);
    DIDR0 = (1 << ADC5D) | (1 << ADC4D) | (1 << ADC3D) | (1 << ADC2D) | (1 << ADC1D) | (1 << ADC0D);
}

int main

(

void

)

This is the main routine.

Definition at line 136 of file main.c.

References ASYNC_Init(), Disable_RTC(), gState, LED_Init(), LOWPOWER_Init(), RTC_Init(), and run.

{
    LOWPOWER_Init();
    ASYNC_Init();
    LED_Init();

    for(;;) {
        switch(gState) {
            case 0:
                DDRC  = (1 << PINC4);
                PORTC = (1 << PINC4);
                break;
            /* Idle */
            case 1:
                set_sleep_mode(SLEEP_MODE_IDLE); 
                DDRC  = (1 << PINC3);   
                PORTC = (1 << PINC3);
                break;
            /* Power-save */
            case 2:
                set_sleep_mode(SLEEP_MODE_PWR_SAVE);
                DDRC  = (1 << PINC2);
                PORTC = (1 << PINC2);
                RTC_Init();
                break;
            /* Power-down */
            case 3:
                set_sleep_mode(SLEEP_MODE_PWR_DOWN); 
                DDRC  = (1 << PINC1);
                PORTC = (1 << PINC1);
                break;
            /* Shouldn't go to here. Go to Idle.*/
            default:
                gState = 1;
                set_sleep_mode(SLEEP_MODE_IDLE); 
                DDRC  = (1 << PINC3);   
                PORTC = (1 << PINC3);
        }
        
        sei(); 
        _delay_ms( 250 );
        // Check if key
        while ( !(PIND & (1 << PIND2))){
        }
        run = false;

        PORTC &= ~((1 << PINC1) | (1 << PINC2) | (1 << PINC3) | (1 << PINC4));  //LED OFF
        DDRC = 0x0;//INPUT

        if (gState == 0) {
            while (!run ){
            }
        } else {
            cli();
            sleep_enable();
            sleep_bod_disable();
            sei();
            sleep_cpu();
            sleep_disable();
            cli();
            /* Wake up from Power-Save mode */
            if (gState == 2) {
                Disable_RTC();
            }
        } 
        gState++;
        if (gState > 3) gState =0;    
    }
}

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void RTC_Init

(

void

)

Enable RTC.

Definition at line 98 of file main.c.

Referenced by main().

{
    PRR &= ~(1 << PRTIM2 );
    ASSR |= (1 << AS2);
}

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Variable Documentation

uint8_t gState = 0

Global variable to keep track of which state the program is in.

Definition at line 67 of file main.c.

Referenced by main().

volatile bool run = false

Definition at line 68 of file main.c.

Referenced by ISR(), and main().