XMEGA_power_consumption.c File Reference

XMEGA power consumption main program file. More...

#include "avr_compiler.h"
#include "lowpower.h"
#include "rtc_driver.h"
#include "clksys_driver.h"
#include <avr/sleep.h>

Include dependency graph for XMEGA_power_consumption.c:

Go to the source code of this file.

Defines
#define	F_CPU   2000000UL
#define	LEDPORT   PORTD
#define	SWITCHPORT   PORTC
Functions
void	ASYNC_Init (void)
	Init function for Asynchonous I/O interrupt.
void	Disable_RTC (void)
	Disable RTC module.
void	Enable_RTC (void)
	Enabel RTC module.
	ISR (PORTC_INT0_vect)
void	LED_Init (void)
	LED Blink.
int	main (void)
	This is the main routine.
void	RTC_Init (void)
	RTC Init.
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

XMEGA power consumption main program file.

This file contains a simple program for measuring the current consumption of the ATxmega32A4 on the picoPower board in Active,Idle, Power save and Power down modes.

Note:

The device is initialized with the LOWPOWER_Init(), which enables pull-up on all I/O pins and disables the JTAG-interface (if configured in lowpower.h).

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 XMEGA_power_consumption.c.

---

Define Documentation

#define F_CPU   2000000UL

Definition at line 64 of file XMEGA_power_consumption.c.

#define LEDPORT   PORTD

Definition at line 62 of file XMEGA_power_consumption.c.

Referenced by LED_Init(), and main().

#define SWITCHPORT   PORTC

Definition at line 61 of file XMEGA_power_consumption.c.

Referenced by ASYNC_Init().

---

Function Documentation

void ASYNC_Init

(

void

)

Init function for Asynchonous I/O interrupt.

Definition at line 76 of file XMEGA_power_consumption.c.

References SWITCHPORT.

Referenced by main().

{
    /* Pin 2 is used as source for interrupt */
    SWITCHPORT.INT0MASK  = PIN2_bm;

    /* Input configuaratin as low level */
    SWITCHPORT.PIN2CTRL  =  PORT_ISC_LEVEL_gc | PORT_OPC_PULLUP_gc; 
      
    /* Enable low level interrupt */
    SWITCHPORT.INTCTRL   = PORT_INT0LVL_LO_gc;

    /* Enable low leverl interrutp excute */
    PMIC.CTRL |= PMIC_LOLVLEX_bm; 
}

void Disable_RTC

(

void

)

Disable RTC module.

Definition at line 130 of file XMEGA_power_consumption.c.

Referenced by main().

{
    PR.PRGEN |= PR_RTC_bm;
}

void Enable_RTC

(

void

)

Enabel RTC module.

Definition at line 122 of file XMEGA_power_consumption.c.

Referenced by main().

{
    /* Clear bit for RTC in PRR (it is set by LOWPOWER_Init()).*/
    PR.PRGEN &= ~PR_RTC_bm;
}

ISR

(

PORTC_INT0_vect

)

Asychronous ISR port C

This ISR simply updates run flag and wake up chip

Definition at line 220 of file XMEGA_power_consumption.c.

References run.

{
    run = true;
}

void LED_Init

(

void

)

LED Blink.

Definition at line 93 of file XMEGA_power_consumption.c.

References LEDPORT.

Referenced by main().

{
    LEDPORT.DIR = PIN3_bm | PIN4_bm | PIN5_bm | PIN6_bm; 
    LEDPORT.OUT |= PIN3_bm | PIN4_bm | PIN5_bm | PIN6_bm;//on  
    delay_us( 500000 ); 
    LEDPORT.OUT &= ~(PIN3_bm | PIN4_bm | PIN5_bm | PIN6_bm);//off
}

int main

(

void

)

This is the main routine.

Definition at line 139 of file XMEGA_power_consumption.c.

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

{

    RTC_Init();
    LOWPOWER_Init();    
    ASYNC_Init();
    LED_Init();

    /* ATxmega32a4 A version bug, see Errata */
    CCP = 0xd8;
    NVM.CTRLB |= 0x06;

    for(;;) {
        switch(gState) {
            case 0:
                LEDPORT.OUT = (PIN6_bm);
                break;
            /* Idle */ 
            case 1:
                set_sleep_mode(SLEEP_MODE_IDLE); 
                LEDPORT.OUT = (PIN5_bm);
                break;
            /* Power-save */
            case 2:
                set_sleep_mode(SLEEP_MODE_PWR_SAVE); 
                LEDPORT.OUT = (PIN4_bm);
                Enable_RTC();
                break;
            /* Power-down */
            case 3:
                set_sleep_mode(SLEEP_MODE_PWR_DOWN);
                LEDPORT.OUT = (PIN3_bm);
                break;
            /* Shouldn't go to here. Go to Idle.*/
            default:
                set_sleep_mode(SLEEP_MODE_IDLE); 
                LEDPORT.OUT = (PIN5_bm);
    }
    sei(); 

    delay_us( 250000 );

    LEDPORT.OUT &= ~(PIN3_bm | PIN4_bm | PIN5_bm | PIN6_bm);//turn off
    /* Set pull down to avode light LED */
    LEDPORT.PIN3CTRL = 0X0;
    LEDPORT.PIN4CTRL = 0X0;
    LEDPORT.PIN5CTRL = 0X0;
    LEDPORT.PIN6CTRL = 0X0;

    LEDPORT.DIR = 0x0;

    run = false;
    if (gState != 0) {
        sleep_enable();
        sleep_cpu();
        sleep_disable();
        cli();
        /* Wake up from RTC */
        if (gState == 2) {
            Disable_RTC();
        }
    } else {
        /* Active mode */
        while(!run){
        };
        cli();
    }

    LEDPORT.DIR = PIN3_bm | PIN4_bm | PIN5_bm | PIN6_bm;//Pin output
    
    /* switch status */
    gState++;
    if (gState > 3) gState =0;      
    };
}

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void RTC_Init

(

void

)

RTC Init.

Definition at line 104 of file XMEGA_power_consumption.c.

References RTC_Busy.

Referenced by main().

{
    /* Enable external 32 kHz XTAL oscillator in low-power mode for RTC */
    OSC.XOSCCTRL = OSC_XOSCSEL_32KHz_gc | OSC_X32KLPM_bm;
    OSC.CTRL |= OSC_XOSCEN_bm;

    /* Wait for oscillator to stabilize */
    do { } while (!( OSC.STATUS & OSC_XOSCRDY_bm ));
    
    /* Set the oscillator as clock source for RTC */
    CLK.RTCCTRL = CLK_RTCSRC_TOSC_gc | CLK_RTCEN_bm;

    /* Wait until RTC is ready */
    do { } while ( RTC_Busy() );
}

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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 69 of file XMEGA_power_consumption.c.

Referenced by main().

volatile bool run = false

Definition at line 70 of file XMEGA_power_consumption.c.

Referenced by ISR(), and main().