Device
nRF52840dk PCA10056
nRF6707 power profiler
What I Want to Do
I'm trying to achieve ION_RAMON_RTC current consumption of 3.16µA via Zephyr but I have not been able to get below 3.8µA avg consumption. I've followed the Optimizing Power on nRF52 Designs guide to a tee but am still not having luck. What am I missing? I'm observing with my power profiler a periodic spike in current consumption which might be a clue.
KCONFIGS
# DEBUG CONFIGS CONFIG_ASSERT=n # Memory/etc configs CONFIG_DEBUG=n CONFIG_DEBUG_OPTIMIZATIONS=n ##### PRINTING | LOGGING ##### # Print configs CONFIG_PRINTK=n CONFIG_USE_SEGGER_RTT=n CONFIG_RTT_CONSOLE=n CONFIG_UART_CONSOLE=y # Logging CONFIG_LOG=n CONFIG_LOG_MAX_LEVEL=4 CONFIG_LOG_BACKEND_RTT=y CONFIG_LOG_BUFFER_SIZE=1024 CONFIG_LOG_STRDUP_BUF_COUNT=128 # Clock Configs CONFIG_CLOCK_CONTROL=y CONFIG_CLOCK_CONTROL_NRF=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y CONFIG_NRF_RTC_TIMER=y # Power CONFIG_SYS_POWER_MANAGEMENT=y CONFIG_DEVICE_POWER_MANAGEMENT=y CONFIG_DEVICE_IDLE_PM=y CONFIG_BOARD_ENABLE_DCDC=y
Main.c
#include <zephyr.h>
#include <hal/nrf_saadc.h>
#include <hal/nrf_comp.h>
#include <hal/nrf_lpcomp.h>
#include <hal/nrf_timer.h>
#include <hal/nrf_uart.h>
#include <hal/nrf_uarte.h>
#include <hal/nrf_power.h>
#include <hal/nrf_rtc.h>
void set_regulator_ldo(void)
{
nrf_power_dcdcen_set(NRF_POWER, 0);
}
void set_lfrc(void)
{
NRF_CLOCK->LFCLKSRC = 0;
NRF_CLOCK->TASKS_LFCLKSTART = 1;
}
void idle_all_peripherals(void)
{
nrf_saadc_disable(NRF_SAADC);
nrf_comp_disable(NRF_COMP);
nrf_lpcomp_disable(NRF_LPCOMP);
nrf_timer_task_trigger(NRF_TIMER0, NRF_TIMER_TASK_STOP);
nrf_timer_task_trigger(NRF_TIMER1, NRF_TIMER_TASK_STOP);
nrf_timer_task_trigger(NRF_TIMER2, NRF_TIMER_TASK_STOP);
nrf_timer_task_trigger(NRF_TIMER3, NRF_TIMER_TASK_STOP);
nrf_timer_task_trigger(NRF_TIMER4, NRF_TIMER_TASK_STOP);
nrf_rtc_task_trigger(NRF_RTC0, NRF_RTC_TASK_STOP);
nrf_rtc_task_trigger(NRF_RTC2, NRF_RTC_TASK_STOP);
nrf_uart_disable(NRF_UART0);
nrf_uarte_disable(NRF_UARTE0);
nrf_uarte_disable(NRF_UARTE1);
}
void stop_clock(void)
{
NRF_CLOCK->TASKS_LFCLKSTOP = 1;
NRF_CLOCK->TASKS_HFCLKSTOP = 1;
}
int main(void)
{
set_regulator_ldo();
set_lfrc();
idle_all_peripherals();
stop_clock();
k_sleep(K_FOREVER);
return 0;
}Power Profiler Output
