Hello everyone.
I have designed a custom board using the nRF9160.
Everything seems to be working fine. Now I want to measure the current drawn by the nRF9160.
I made the most basic application which essentially does nothing.
main.c
#include <zephyr.h>
void main(void)
{
k_cpu_idle();
}
prj.conf
# Peripherals CONFIG_GPIO=n # GPIO CONFIG_SERIAL=n # UART CONFIG_I2C=y # I2C, needed for PMIC configuration at startup CONFIG_SPI=n # SPI # Zephyr Device Power Management CONFIG_DEVICE_POWER_MANAGEMENT=y CONFIG_PM=y
The generated autoconf.h file:
#define CONFIG_I2C 1 #define CONFIG_BOARD "iot_tracker" #define CONFIG_FLASH_LOAD_SIZE 0x0 #define CONFIG_FLASH_LOAD_OFFSET 0x0 #define CONFIG_SOC "nRF9160_SICA" #define CONFIG_SOC_SERIES "nrf91" #define CONFIG_NUM_IRQS 65 #define CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC 32768 #define CONFIG_HEAP_MEM_POOL_SIZE 0 #define CONFIG_PM 1 #define CONFIG_HAS_POWER_STATE_DEEP_SLEEP_1 1 #define CONFIG_PM_DEVICE 1 #define CONFIG_SOC_HAS_TIMING_FUNCTIONS 1 #define CONFIG_ARCH_HAS_CUSTOM_BUSY_WAIT 1 #define CONFIG_CLOCK_CONTROL 1 #define CONFIG_NRF_RTC_TIMER 1 #define CONFIG_SYS_CLOCK_TICKS_PER_SEC 32768 #define CONFIG_BUILD_OUTPUT_HEX 1 #define CONFIG_ROM_START_OFFSET 0x0 #define CONFIG_FLASH_SIZE 1024 #define CONFIG_FLASH_BASE_ADDRESS 0x0 #define CONFIG_MAIN_STACK_SIZE 1024 #define CONFIG_PRIVILEGED_STACK_SIZE 1024 #define CONFIG_PM_PARTITION_SIZE_PROVISION 0x280 #define CONFIG_PM_PARTITION_SIZE_B0_IMAGE 0x8000 #define CONFIG_SB_VALIDATION_INFO_MAGIC 0x86518483 #define CONFIG_SB_VALIDATION_POINTER_MAGIC 0x6919b47e #define CONFIG_SB_VALIDATION_INFO_CRYPTO_ID 1 #define CONFIG_SB_VALIDATION_INFO_VERSION 2 #define CONFIG_SB_VALIDATION_METADATA_OFFSET 0 #define CONFIG_SB_VALIDATE_FW_SIGNATURE 1 #define CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE 1024 #define CONFIG_MPSL_THREAD_COOP_PRIO 8 #define CONFIG_MPSL_SIGNAL_STACK_SIZE 1024 #define CONFIG_MPSL_TIMESLOT_SESSION_COUNT 0 #define CONFIG_SRAM_SIZE 256 #define CONFIG_SRAM_BASE_ADDRESS 0x20000000 #define CONFIG_PM_SRAM_BASE 0x20000000 #define CONFIG_PM_SRAM_SIZE 0x40000 #define CONFIG_BOOT_SIGNATURE_KEY_FILE "" #define CONFIG_NRF_SPU_FLASH_REGION_SIZE 0x8000 #define CONFIG_FPROTECT_BLOCK_SIZE 0x8000 #define CONFIG_RESET_ON_FATAL_ERROR 1 #define CONFIG_HW_CC3XX 1 #define CONFIG_HW_CC3XX_NAME "HW_CC3XX_0" #define CONFIG_ZEPHYR_NRF_MODULE 1 #define CONFIG_DT_FLASH_WRITE_BLOCK_SIZE 4 #define CONFIG_ZEPHYR_MCUBOOT_MODULE 1 #define CONFIG_NRF_MODEM_SHMEM_CTRL_SIZE 0x4e8 #define CONFIG_NRFXLIB_CRYPTO 1 #define CONFIG_NRF_CC3XX_PLATFORM 1 #define CONFIG_CC3XX_MUTEX_LOCK 1 #define CONFIG_ZIGBEE_LIBRARY_DEVELOPMENT 1 #define CONFIG_ZIGBEE_LIBRARY_SOC 1 #define CONFIG_ZIGBEE_GP_PB 1 #define CONFIG_ZEPHYR_NRFXLIB_MODULE 1 #define CONFIG_ZEPHYR_CDDL_GEN_MODULE 1 #define CONFIG_ZEPHYR_HAL_NORDIC_MODULE 1 #define CONFIG_HAS_NRFX 1 #define CONFIG_NRFX_CLOCK 1 #define CONFIG_NRFX_CLOCK_LFXO_TWO_STAGE_ENABLED 1 #define CONFIG_NRFX_TWIM 1 #define CONFIG_NRFX_TWIM2 1 #define CONFIG_ZEPHYR_CONNECTEDHOMEIP_MODULE 1 #define CONFIG_HAS_CMSIS_CORE 1 #define CONFIG_HAS_CMSIS_CORE_M 1 #define CONFIG_NUM_PREEMPT_PRIORITIES 15 #define CONFIG_BOARD_IOT_TRACKER 1 #define CONFIG_SOC_SERIES_NRF91X 1 #define CONFIG_CPU_HAS_ARM_MPU 1 #define CONFIG_CPU_HAS_NRF_IDAU 1 #define CONFIG_NRF_SPU_RAM_REGION_SIZE 0x2000 #define CONFIG_SOC_FAMILY "nordic_nrf" #define CONFIG_SOC_FAMILY_NRF 1 #define CONFIG_HAS_HW_NRF_CC310 1 #define CONFIG_HAS_HW_NRF_CLOCK 1 #define CONFIG_HAS_HW_NRF_DPPIC 1 #define CONFIG_HAS_HW_NRF_EGU0 1 #define CONFIG_HAS_HW_NRF_EGU1 1 #define CONFIG_HAS_HW_NRF_EGU2 1 #define CONFIG_HAS_HW_NRF_EGU3 1 #define CONFIG_HAS_HW_NRF_EGU4 1 #define CONFIG_HAS_HW_NRF_EGU5 1 #define CONFIG_HAS_HW_NRF_GPIO0 1 #define CONFIG_HAS_HW_NRF_GPIOTE 1 #define CONFIG_HAS_HW_NRF_I2S 1 #define CONFIG_HAS_HW_NRF_IPC 1 #define CONFIG_HAS_HW_NRF_NVMC_PE 1 #define CONFIG_HAS_HW_NRF_PDM 1 #define CONFIG_HAS_HW_NRF_POWER 1 #define CONFIG_HAS_HW_NRF_PWM0 1 #define CONFIG_HAS_HW_NRF_PWM1 1 #define CONFIG_HAS_HW_NRF_PWM2 1 #define CONFIG_HAS_HW_NRF_PWM3 1 #define CONFIG_HAS_HW_NRF_RTC0 1 #define CONFIG_HAS_HW_NRF_RTC1 1 #define CONFIG_HAS_HW_NRF_SAADC 1 #define CONFIG_HAS_HW_NRF_SPIM0 1 #define CONFIG_HAS_HW_NRF_SPIM1 1 #define CONFIG_HAS_HW_NRF_SPIM2 1 #define CONFIG_HAS_HW_NRF_SPIM3 1 #define CONFIG_HAS_HW_NRF_SPIS0 1 #define CONFIG_HAS_HW_NRF_SPIS1 1 #define CONFIG_HAS_HW_NRF_SPIS2 1 #define CONFIG_HAS_HW_NRF_SPIS3 1 #define CONFIG_HAS_HW_NRF_SPU 1 #define CONFIG_HAS_HW_NRF_TIMER0 1 #define CONFIG_HAS_HW_NRF_TIMER1 1 #define CONFIG_HAS_HW_NRF_TIMER2 1 #define CONFIG_HAS_HW_NRF_TWIM0 1 #define CONFIG_HAS_HW_NRF_TWIM1 1 #define CONFIG_HAS_HW_NRF_TWIM2 1 #define CONFIG_HAS_HW_NRF_TWIM3 1 #define CONFIG_HAS_HW_NRF_TWIS0 1 #define CONFIG_HAS_HW_NRF_TWIS1 1 #define CONFIG_HAS_HW_NRF_TWIS2 1 #define CONFIG_HAS_HW_NRF_TWIS3 1 #define CONFIG_HAS_HW_NRF_UARTE0 1 #define CONFIG_HAS_HW_NRF_UARTE1 1 #define CONFIG_HAS_HW_NRF_UARTE2 1 #define CONFIG_HAS_HW_NRF_UARTE3 1 #define CONFIG_HAS_HW_NRF_WDT 1 #define CONFIG_NRF_HW_RTC1_RESERVED 1 #define CONFIG_NRF_ENABLE_ICACHE 1 #define CONFIG_SOC_NRF9160 1 #define CONFIG_SOC_NRF9160_SICA 1 #define CONFIG_SOC_COMPATIBLE_NRF 1 #define CONFIG_ARCH "arm" #define CONFIG_CPU_CORTEX 1 #define CONFIG_CPU_CORTEX_M 1 #define CONFIG_ISA_THUMB2 1 #define CONFIG_ASSEMBLER_ISA_THUMB2 1 #define CONFIG_COMPILER_ISA_THUMB2 1 #define CONFIG_STACK_ALIGN_DOUBLE_WORD 1 #define CONFIG_PLATFORM_SPECIFIC_INIT 1 #define CONFIG_FAULT_DUMP 2 #define CONFIG_BUILTIN_STACK_GUARD 1 #define CONFIG_ARM_STACK_PROTECTION 1 #define CONFIG_CPU_CORTEX_M33 1 #define CONFIG_CPU_CORTEX_M_HAS_SYSTICK 1 #define CONFIG_CPU_CORTEX_M_HAS_DWT 1 #define CONFIG_CPU_CORTEX_M_HAS_BASEPRI 1 #define CONFIG_CPU_CORTEX_M_HAS_VTOR 1 #define CONFIG_CPU_CORTEX_M_HAS_SPLIM 1 #define CONFIG_CPU_CORTEX_M_HAS_PROGRAMMABLE_FAULT_PRIOS 1 #define CONFIG_CPU_CORTEX_M_HAS_CMSE 1 #define CONFIG_ARMV7_M_ARMV8_M_MAINLINE 1 #define CONFIG_ARMV8_M_MAINLINE 1 #define CONFIG_ARMV8_M_SE 1 #define CONFIG_ARMV7_M_ARMV8_M_FP 1 #define CONFIG_ARMV8_M_DSP 1 #define CONFIG_GEN_ISR_TABLES 1 #define CONFIG_ARM_MPU 1 #define CONFIG_ARM_MPU_REGION_MIN_ALIGN_AND_SIZE 32 #define CONFIG_CUSTOM_SECTION_MIN_ALIGN_SIZE 32 #define CONFIG_ARM_TRUSTZONE_M 1 #define CONFIG_GEN_IRQ_VECTOR_TABLE 1 #define CONFIG_IDLE_STACK_SIZE 320 #define CONFIG_ISR_STACK_SIZE 2048 #define CONFIG_TEST_EXTRA_STACKSIZE 0 #define CONFIG_ARM 1 #define CONFIG_ARCH_IS_SET 1 #define CONFIG_HW_STACK_PROTECTION 1 #define CONFIG_KOBJECT_TEXT_AREA 256 #define CONFIG_GEN_PRIV_STACKS 1 #define CONFIG_GEN_SW_ISR_TABLE 1 #define CONFIG_ARCH_SW_ISR_TABLE_ALIGN 0 #define CONFIG_GEN_IRQ_START_VECTOR 0 #define CONFIG_ARCH_HAS_TIMING_FUNCTIONS 1 #define CONFIG_ARCH_HAS_TRUSTED_EXECUTION 1 #define CONFIG_ARCH_HAS_STACK_PROTECTION 1 #define CONFIG_ARCH_HAS_USERSPACE 1 #define CONFIG_ARCH_HAS_EXECUTABLE_PAGE_BIT 1 #define CONFIG_ARCH_HAS_RAMFUNC_SUPPORT 1 #define CONFIG_ARCH_HAS_NESTED_EXCEPTION_DETECTION 1 #define CONFIG_ARCH_SUPPORTS_COREDUMP 1 #define CONFIG_ARCH_SUPPORTS_ARCH_HW_INIT 1 #define CONFIG_ARCH_HAS_EXTRA_EXCEPTION_INFO 1 #define CONFIG_ARCH_HAS_THREAD_LOCAL_STORAGE 1 #define CONFIG_ARCH_HAS_THREAD_ABORT 1 #define CONFIG_CPU_HAS_TEE 1 #define CONFIG_CPU_HAS_FPU 1 #define CONFIG_CPU_HAS_MPU 1 #define CONFIG_MPU 1 #define CONFIG_MPU_REQUIRES_NON_OVERLAPPING_REGIONS 1 #define CONFIG_MPU_GAP_FILLING 1 #define CONFIG_SRAM_REGION_PERMISSIONS 1 #define CONFIG_MULTITHREADING 1 #define CONFIG_NUM_COOP_PRIORITIES 16 #define CONFIG_MAIN_THREAD_PRIORITY 0 #define CONFIG_COOP_ENABLED 1 #define CONFIG_PREEMPT_ENABLED 1 #define CONFIG_PRIORITY_CEILING 0 #define CONFIG_NUM_METAIRQ_PRIORITIES 0 #define CONFIG_THREAD_STACK_INFO 1 #define CONFIG_ERRNO 1 #define CONFIG_SCHED_DUMB 1 #define CONFIG_WAITQ_DUMB 1 #define CONFIG_BOOT_DELAY 0 #define CONFIG_SYSTEM_WORKQUEUE_PRIORITY -1 #define CONFIG_ATOMIC_OPERATIONS_BUILTIN 1 #define CONFIG_TIMESLICING 1 #define CONFIG_TIMESLICE_SIZE 0 #define CONFIG_TIMESLICE_PRIORITY 0 #define CONFIG_NUM_MBOX_ASYNC_MSGS 10 #define CONFIG_NUM_PIPE_ASYNC_MSGS 10 #define CONFIG_KERNEL_MEM_POOL 1 #define CONFIG_ARCH_HAS_CUSTOM_SWAP_TO_MAIN 1 #define CONFIG_SWAP_NONATOMIC 1 #define CONFIG_SYS_CLOCK_EXISTS 1 #define CONFIG_TIMEOUT_64BIT 1 #define CONFIG_XIP 1 #define CONFIG_KERNEL_INIT_PRIORITY_OBJECTS 30 #define CONFIG_KERNEL_INIT_PRIORITY_DEFAULT 40 #define CONFIG_KERNEL_INIT_PRIORITY_DEVICE 50 #define CONFIG_APPLICATION_INIT_PRIORITY 90 #define CONFIG_MP_NUM_CPUS 1 #define CONFIG_TICKLESS_IDLE 1 #define CONFIG_TICKLESS_IDLE_THRESH 3 #define CONFIG_TICKLESS_KERNEL 1 #define CONFIG_HAS_DTS 1 #define CONFIG_HAS_SEGGER_RTT 1 #define CONFIG_NRF_RTC_TIMER_USER_CHAN_COUNT 0 #define CONFIG_SYSTEM_CLOCK_WAIT_FOR_STABILITY 1 #define CONFIG_SYSTEM_CLOCK_DISABLE 1 #define CONFIG_SYSTEM_CLOCK_INIT_PRIORITY 0 #define CONFIG_TICKLESS_CAPABLE 1 #define CONFIG_I2C_NRFX 1 #define CONFIG_I2C_2_NRF_TWIM 1 #define CONFIG_I2C_INIT_PRIORITY 60 #define CONFIG_CLOCK_CONTROL_NRF 1 #define CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL 1 #define CONFIG_CLOCK_CONTROL_NRF_K32SRC_20PPM 1 #define CONFIG_CLOCK_CONTROL_NRF_ACCURACY 20 #define CONFIG_MINIMAL_LIBC 1 #define CONFIG_HAS_NEWLIB_LIBC_NANO 1 #define CONFIG_MINIMAL_LIBC_MALLOC 1 #define CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE 0 #define CONFIG_MINIMAL_LIBC_CALLOC 1 #define CONFIG_MINIMAL_LIBC_REALLOCARRAY 1 #define CONFIG_SYS_HEAP_ALLOC_LOOPS 3 #define CONFIG_CBPRINTF_COMPLETE 1 #define CONFIG_CBPRINTF_FULL_INTEGRAL 1 #define CONFIG_CBPRINTF_N_SPECIFIER 1 #define CONFIG_POSIX_MAX_FDS 4 #define CONFIG_MAX_TIMER_COUNT 5 #define CONFIG_PRINTK 1 #define CONFIG_ASSERT_VERBOSE 1 #define CONFIG_PM_POLICY_RESIDENCY 1 #define CONFIG_PM_POLICY_RESIDENCY_DEFAULT 1 #define CONFIG_PM_MIN_RESIDENCY_DEEP_SLEEP_1 60000 #define CONFIG_DEVICE_POWER_MANAGEMENT 1 #define CONFIG_PM_MAX_DEVICES 15 #define CONFIG_TEST_ARM_CORTEX_M 1 #define CONFIG_TOOLCHAIN_GNUARMEMB 1 #define CONFIG_LINKER_ORPHAN_SECTION_WARN 1 #define CONFIG_HAS_FLASH_LOAD_OFFSET 1 #define CONFIG_KERNEL_ENTRY "__start" #define CONFIG_LINKER_SORT_BY_ALIGNMENT 1 #define CONFIG_SIZE_OPTIMIZATIONS 1 #define CONFIG_COMPILER_OPT "" #define CONFIG_RUNTIME_ERROR_CHECKS 1 #define CONFIG_KERNEL_BIN_NAME "zephyr" #define CONFIG_OUTPUT_STAT 1 #define CONFIG_OUTPUT_DISASSEMBLY 1 #define CONFIG_OUTPUT_PRINT_MEMORY_USAGE 1 #define CONFIG_BUILD_OUTPUT_BIN 1 #define CONFIG_REBOOT 1 #define CONFIG_COMPAT_INCLUDES 1
I think I disabled as much as I could.
I want to achieve the lowest possible idle current consumption.
With the Nordic Thingy91 i get around 2-4µA, which is as expected.
But when I use my custom board I get around 2,8mA with the same firmware!
Even when I put the nRF9160 to deep sleep with nrf_regulators_system_off(), I still get 2,8mA.
The datasheet says the active current consumption of the nRF9160 is around 2,2mA, which is kind of in the same area.
The Thingy91 I have, has the the nRF9160 SICA B0.
The prototype I have designed has the nRF9160 SICA B1, so the newer generation I guess.
Is there something I didn't consider when it comes to a custom board?
Could it be a design error, that it always drains around 2,8mA, even if the nRF9160 does nothing and all GPIO pins (except I2C) are diabled?
Here is my nRF9160 with all the connections.
Thank you!
