Hi,
SDK version : NCS 2.1.0
Hardware : nRF52840 DK (External supply)
I am trying to put the nrf52840 to idle mode based on the system_off example.
D:\NCS_2.1.0\v2.1.0\zephyr\samples\boards\nrf\system_off
prj,config setting
CONFIG_PM=y # Required to disable default behavior of deep sleep on timeout CONFIG_PM_DEVICE=y CONFIG_GPIO=y # Optional select RAM retention (nRF52 only) #CONFIG_APP_RETENTION=y CONFIG_THREAD_NAME=y # enable DC.DC CONFIG_BOARD_ENABLE_DCDC=y
I use pm_state_force(0u, &(struct pm_state_info){PM_STATE_STANDBY, 0, 0}); to put system to idle mode and find the idle current is stuck at 500uA .
void main(void)
{
int rc;
const struct device *cons = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
if (!device_is_ready(cons)) {
printk("%s: device not ready.\n", cons->name);
return;
}
printk("\n%s system off demo\n", CONFIG_BOARD);
if (IS_ENABLED(CONFIG_APP_RETENTION)) {
bool retained_ok = retained_validate();
/* Increment for this boot attempt and update. */
retained.boots += 1;
retained_update();
printk("Retained data: %s\n", retained_ok ? "valid" : "INVALID");
printk("Boot count: %u\n", retained.boots);
printk("Off count: %u\n", retained.off_count);
printk("Active Ticks: %" PRIu64 "\n", retained.uptime_sum);
} else {
printk("Retained data not supported\n");
}
/* Configure to generate PORT event (wakeup) on button 1 press. */
nrf_gpio_cfg_input(NRF_DT_GPIOS_TO_PSEL(DT_ALIAS(sw0), gpios),
NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_sense_set(NRF_DT_GPIOS_TO_PSEL(DT_ALIAS(sw0), gpios),
NRF_GPIO_PIN_SENSE_LOW);
printk("Busy-wait %u s\n", BUSY_WAIT_S);
k_busy_wait(BUSY_WAIT_S * USEC_PER_SEC);
printk("Busy-wait %u s with UART off\n", BUSY_WAIT_S);
rc = pm_device_action_run(cons, PM_DEVICE_ACTION_SUSPEND);
k_busy_wait(BUSY_WAIT_S * USEC_PER_SEC);
rc = pm_device_action_run(cons, PM_DEVICE_ACTION_RESUME);
printk("Sleep %u s\n", SLEEP_S);
k_sleep(K_SECONDS(SLEEP_S));
printk("Sleep %u s with UART off\n", SLEEP_S);
rc = pm_device_action_run(cons, PM_DEVICE_ACTION_SUSPEND);
k_sleep(K_SECONDS(SLEEP_S));
rc = pm_device_action_run(cons, PM_DEVICE_ACTION_RESUME);
printk("Entering system off; press BUTTON1 to restart\n");
if (IS_ENABLED(CONFIG_APP_RETENTION)) {
/* Update the retained state */
retained.off_count += 1;
retained_update();
}
/* Above we disabled entry to deep sleep based on duration of
* controlled delay. Here we need to override that, then
* force entry to deep sleep on any delay.
*/
pm_state_force(0u, &(struct pm_state_info){PM_STATE_STANDBY, 0, 0});
/* Now we need to go sleep. This will let the idle thread runs and
* the pm subsystem will use the forced state. To confirm that the
* forced state is used, lets set the same timeout used previously.
*/
k_sleep(K_SECONDS(SLEEP_S));
printk("ERROR: System off failed\n");
while (true) {
return;
}
}
As my understanding, once there is no other thread running, system will enter the idle thread.
I also use thread analyzer to make sure there is no any other thread alive.
About the high current condition, do you have any advice on it?
