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Dtynin

•Created by Dtynin on 7/30/2024 in #pcb-and-analog

Need assistance implementing a low-power mode to extend battery life for the ATmega2560

Hi friends, I need assistance implementing a low-power mode to extend battery life for the ATmega2560 with Zephyr OS, and resolve the issue of failing to wake up from low-power mode? I have been able to configure low-power mode in Zephyr and set up a wake-up source via an external interrupt, yet I still encounter the issue of the microcontroller failing to wake up from low-power mode. Here's the code:

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>
#include <power/power.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define WAKEUP_PIN DT_GPIO_PIN(DT_NODELABEL(gpio0), wakeup_pin)

void main(void)
{
    const struct device *gpio_dev = device_get_binding(DT_LABEL(DT_NODELABEL(gpio0)));

    gpio_pin_configure(gpio_dev, WAKEUP_PIN, GPIO_INPUT | GPIO_INT_EDGE_TO_ACTIVE);
    gpio_pin_interrupt_configure(gpio_dev, WAKEUP_PIN, GPIO_INT_EDGE_TO_ACTIVE);

    while (1) {
        k_sleep(K_SECONDS(10));
        sys_pm_force_power_state(SYS_POWER_STATE_DEEP_SLEEP_1);
    }
}

#include <zephyr.h>
#include <device.h>
#include <drivers/gpio.h>
#include <power/power.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define WAKEUP_PIN DT_GPIO_PIN(DT_NODELABEL(gpio0), wakeup_pin)

void main(void)
{
    const struct device *gpio_dev = device_get_binding(DT_LABEL(DT_NODELABEL(gpio0)));

    gpio_pin_configure(gpio_dev, WAKEUP_PIN, GPIO_INPUT | GPIO_INT_EDGE_TO_ACTIVE);
    gpio_pin_interrupt_configure(gpio_dev, WAKEUP_PIN, GPIO_INT_EDGE_TO_ACTIVE);

    while (1) {
        k_sleep(K_SECONDS(10));
        sys_pm_force_power_state(SYS_POWER_STATE_DEEP_SLEEP_1);
    }
}

If the implementation is successful, the microcontroller should wake up from low power mode when an external interrupt is triggered, and log messages before and after sleep to indicate proper functioning.

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