Hello,
I'm experiencing high current consumption with Zephyr OS. I'm using SDK 3.1.0 and the device still draws about 900 µA, and I don't know why.
Although I have a custom board for the main development, for the power consumption tests I'm using an nRF52840 DK board.
I have enabled the power management feature in prj.conf with: CONFIG_PM_DEVICE
Here is my prj.conf :
CONFIG_PM=y CONFIG_PM_DEVICE=y CONFIG_PM_DEVICE_RUNTIME=y CONFIG_TICKLESS_KERNEL=y CONFIG_GPIO=y CONFIG_CRC=y CONFIG_POWEROFF=y CONFIG_HWINFO=y CONFIG_NCS_SAMPLES_DEFAULTS=y #CONFIG_DK_LIBRARY=y CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048 CONFIG_USE_SEGGER_RTT=y CONFIG_RTT_CONSOLE=y CONFIG_UART_CONSOLE=n CONFIG_NEWLIB_LIBC=y CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y CONFIG_BT=y CONFIG_BT_PERIPHERAL=y CONFIG_BT_DEVICE_NAME="FREEDOM" CONFIG_BT_MAX_CONN=2 CONFIG_BT_SMP=y CONFIG_BT_MAX_PAIRED=8 CONFIG_BT_GATT_AUTO_SEC_REQ=y CONFIG_BT_FIXED_PASSKEY=y CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y # Enable bonding CONFIG_BT_SETTINGS=y CONFIG_FLASH=y CONFIG_FLASH_PAGE_LAYOUT=y CONFIG_FLASH_MAP=y CONFIG_NVS=y CONFIG_SETTINGS=y CONFIG_SETTINGS_RUNTIME=y CONFIG_SETTINGS_NVS=y CONFIG_BT_DIS=y CONFIG_BT_DIS_SETTINGS=y CONFIG_BT_DIS_STR_MAX=32 CONFIG_BT_DIS_PNP=n CONFIG_BT_DIS_MODEL="" CONFIG_BT_DIS_MANUF="" CONFIG_BT_DIS_SERIAL_NUMBER=y CONFIG_BT_DIS_FW_REV=y CONFIG_BT_DIS_HW_REV=y CONFIG_BT_DIS_SW_REV=y CONFIG_BT_DIS_SERIAL_NUMBER_STR="123456789abcdef" CONFIG_BT_DIS_FW_REV_STR="0.0.0" CONFIG_BT_DIS_HW_REV_STR="0.0.0" CONFIG_BT_DIS_SW_REV_STR="0.0.0" # Enable MCUboot bootloader build in the application CONFIG_BOOTLOADER_MCUBOOT=y CONFIG_MCUBOOT_SIGNATURE_KEY_FILE="priv.pem" # Include MCUMGR and its dependencies in the build CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y #CONFIG_MCUMGR_TRANSPORT_BT_AUTHEN=y CONFIG_BT_EXT_ADV=y CONFIG_BT_EXT_ADV_MAX_ADV_SET=2 CONFIG_BT_DEVICE_NAME_DYNAMIC=n CONFIG_BT_CTLR_ADV_DATA_LEN_MAX=100 # CONFIG_BT_GATT_AUTO_UPDATE_MTU=y CONFIG_BT_L2CAP_TX_MTU=247 #CONFIG_BT_CTLR_PHY_2M=y #CONFIG_BT_USER_PHY_UPDATE=y CONFIG_MODBUS=y #CONFIG_MODBUS_RAW_ADU=y #CONFIG_MODBUS_ROLE_CLIENT=y CONFIG_PARTITION_MANAGER_ENABLED=y CONFIG_FILE_SYSTEM=y CONFIG_FILE_SYSTEM_LITTLEFS=y CONFIG_FS_LITTLEFS_BLK_DEV=y #CONFIG_FS_LITTLEFS_FMP_DEV=n CONFIG_FS_LITTLEFS_FC_HEAP_SIZE=8192 CONFIG_FS_LITTLEFS_CACHE_SIZE=512 #CONFIG_FS_LITTLEFS_LOOKAHEAD_SIZE=2048 CONFIG_DISK_ACCESS=y CONFIG_DISK_DRIVERS=y CONFIG_DISK_DRIVER_RAM=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n CONFIG_MULTITHREADING=y CONFIG_HEAP_MEM_POOL_SIZE=30000 # Enable binary descriptors #CONFIG_BINDESC=y # Enable definition of binary descriptors #CONFIG_BINDESC_DEFINE=y # Enable default build time binary descriptors #CONFIG_BINDESC_DEFINE_BUILD_TIME=y #CONFIG_BINDESC_BUILD_DATE_TIME_STRING=y # Enable file system commands CONFIG_MCUMGR_GRP_FS=y CONFIG_MCUMGR_GRP_FS_DL_CHUNK_SIZE_LIMIT=y CONFIG_MCUMGR_GRP_FS_DL_CHUNK_SIZE=200 # Enable the storage erase command. CONFIG_MCUMGR_GRP_ZBASIC=y CONFIG_MCUMGR_GRP_ZBASIC_STORAGE_ERASE=y # Optionally force the file system to be recreated #CONFIG_APP_WIPE_STORAGE=y # fs_dirent structures are big. CONFIG_MAIN_STACK_SIZE=2500 CONFIG_BT_RX_STACK_SIZE=2500 CONFIG_BT_HCI_TX_STACK_SIZE=4096 CONFIG_MCUMGR_TRANSPORT_WORKQUEUE_STACK_SIZE=6000 # Let __ASSERT do its job CONFIG_DEBUG=y CONFIG_INIT_STACKS=y CONFIG_THREAD_STACK_INFO=y CONFIG_MPU_STACK_GUARD=n CONFIG_STACK_SENTINEL=y CONFIG_THREAD_MONITOR=y CONFIG_THREAD_NAME=y # CONFIG_PM_SINGLE_IMAGE=y # or CONFIG_PM_MULTI_IMAGE if you use MCUboot CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK=y #CONFIG_PM_PARTITION_REGION_LITTLEFS_EXTERNAL=y #CONFIG_PM_PARTITION_REGION_SETTINGS_STORAGE_EXTERNAL=y #CONFIG_PM_PARTITION_REGION_NVS_STORAGE_EXTERNAL=y CONFIG_SPI=n # We don’t use Zephyr’s abstraction #CONFIG_SPI_NOR=y #CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096 #CONFIG_NORDIC_QSPI_NOR=y #CONFIG_NORDIC_QSPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096 #CONFIG_NRFX_SPIM=y # Enables global use of SPIM (base for SPIM2) #CONFIG_NRFX_SPIM1=y # We want SPIM2 in low-level (NRFX) CONFIG_NRFX_SPIM2=y # We want SPIM2 in low-level (NRFX) #CONFIG_NRFX_GPIOTE=y CONFIG_GPIO=y CONFIG_NFCT_PINS_AS_GPIOS=y #CONFIG_LOG_DEFAULT_LEVEL=4 #CONFIG_WATCHDOG=n CONFIG_SERIAL=y CONFIG_UART_ASYNC_API=y CONFIG_UART_INTERRUPT_DRIVEN=n CONFIG_SYS_HEAP_RUNTIME_STATS=y # required to get heap stats CONFIG_BT_CTLR_ADVANCED_FEATURES=y CONFIG_BT_CTLR_CONN_RSSI=y CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y CONFIG_RESET_ON_FATAL_ERROR=y #CONFIG_FAULT_DUMP=2 # Print more info on exceptions #CONFIG_EXCEPTION_DEBUG=y # More verbose debug (useful in dev) CONFIG_TINYCRYPT=y CONFIG_TINYCRYPT_AES=y CONFIG_TINYCRYPT_AES_CTR=y CONFIG_MCUMGR_MGMT_NOTIFICATION_HOOKS=y CONFIG_MCUMGR_GRP_FS_FILE_ACCESS_HOOK=y CONFIG_GPIO_AS_PINRESET=y
my .dtsi :
&pinctrl {
uart1_default: uart1_default {
group1 {
psels = <NRF_PSEL(UART_TX, 0, 17)>;
};
group2 {
psels = <NRF_PSEL(UART_RX, 0, 14)>;
bias-pull-up;
};
};
uart1_sleep: uart1_sleep {
group1 {
psels = <NRF_PSEL(UART_TX, 0, 17)>,
<NRF_PSEL(UART_RX, 0, 14)>;
low-power-enable;
};
};
/*
spi2_default: spi2_default {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 11)>,
<NRF_PSEL(SPIM_MOSI, 0, 8)>,
<NRF_PSEL(SPIM_MISO, 0, 7)>;
};
};
spi2_sleep: spi2_sleep {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 11)>,
<NRF_PSEL(SPIM_MOSI, 0, 8)>,
<NRF_PSEL(SPIM_MISO, 0, 7)>;
low-power-enable;
};
};
*/
};
my .dts :
/dts-v1/;
#include <nordic/nrf52840_qfaa.dtsi>
#include "ngtble-pinctrl.dtsi"
/ {
model = "Nordic NGT BLE NRF52840";
compatible = "teledyne,ngtble";
chosen {
/*zephyr,console = &uart0;
zephyr,shell-uart = &uart0;
zephyr,uart-mcumgr = &uart0;
zephyr,bt-mon-uart = &uart0;
zephyr,bt-c2h-uart = &uart0;*/
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,code-partition = &slot0_partition;
zephyr,ieee802154 = &ieee802154;
};
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
};
};
&gpiote {
status = "okay";
};
&gpio0 {
status = "okay";
};
&gpio1 {
status = "okay";
};
&uart1 {
compatible = "nordic,nrf-uarte";
status = "okay";
current-speed = <9600>;
pinctrl-0 = <&uart1_default>;
pinctrl-1 = <&uart1_sleep>;
pinctrl-names = "default", "sleep";
};
&flash0 {
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
boot_partition: partition@0 {
label = "mcuboot";
reg = <0x00000000 DT_SIZE_K(48)>;
};
slot0_partition: partition@c000 {
label = "image-0";
reg = <0x0000c000 DT_SIZE_K(432)>;
};
slot1_partition: partition@78000 {
label = "image-1";
reg = <0x00078000 DT_SIZE_K(432)>;
};
lfs2_partition: partition@E4000 {
label = "lfs2";
reg = <0x000E4000 DT_SIZE_K(104)>;
};
storage_partition: partition@fe000 {
label = "storage";
reg = <0x000fe000 DT_SIZE_K(2)>;
};
};
};
my app.overlay :
/ {
chosen {
/*nordic,pm-ext-flash = &mx25r16;*/
};
fstab {
compatible = "zephyr,fstab";
lfs3: lfs3 {
compatible = "zephyr,fstab,littlefs";
mount-point = "/int1";
partition = <&int_storage_1>;
//automount;
read-size = <16>;
prog-size = <16>;
cache-size = <64>;
lookahead-size = <32>;
block-cycles = <512>;
};
};
ramdisk0: ramdisk {
compatible = "zephyr,ram-disk";
status = "okay";
disk-name = "RAM";
sector-size = <512>;
sector-count = <160>;
};
};
&flash0 {
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
boot_partition: partition@0 {
label = "mcuboot";
reg = <0x00000000 DT_SIZE_K(48)>;
};
slot0_partition: partition@c000 {
label = "image-0";
reg = <0x0000c000 DT_SIZE_K(432)>;
};
slot1_partition: partition@78000 {
label = "image-1";
reg = <0x00078000 DT_SIZE_K(432)>;
};
int_storage_1: partition@E4000 {
label = "int_part_1";
reg = <0x000E4000 DT_SIZE_K(104)>;
};
storage_partition: partition@fe000 {
label = "storage";
reg = <0x000fe000 DT_SIZE_K(2)>;
};
};
};
&uart1 {
status = "okay";
current-speed = <9600>;
pinctrl-0 = <&uart1_default>;
pinctrl-1 = <&uart1_sleep>;
pinctrl-names = "default", "sleep";
modbus0 {
compatible = "zephyr,modbus-serial";
status = "okay";
};
};
&spi2 {
status = "disabled";
};
my main.c file : int main(void)
{
for (;;) {
}
k_sleep(K_MSEC(1000));
}
}
When I load a project with the old SDK 17.1.0, I’m able to reach a power consumption of around 1 µA, so I’m pretty sure this is not a hardware issue.
I check in debug that the WFI instruction was called.
If you have any suggestions, please feel free to share.
Regards,
Aurélien
