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Dick Lin
Dick Lin
Senior
August 13, 2018
Solved

How to measure power consumption for Nucleo-144 board?

  • August 13, 2018
  • 9 replies
  • 8142 views

I am trying to measure the power consumption for Nucleo-144 board.

Here is my config

  • External power supply 8V
  • JP6 to VIN
  • Connect Fluke multimeter to power supply
  • Connect multimeter to CN8 pin 15
  • Connect ST-Link
  • Call HAL_PWR_EnterSTANDBYMode() or LL_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN) force system going standby/shutdown mode.

Is the config correct? I am trying to disable most of the buses before standby. The system doesn't seems go to standby mode since after the call, I am still able to run from IDE.

Is there anything I am missing here?

Thx

HAL_ADCEx_DisableVoltageRegulator(&hadc1);

// HAL_CAN_RequestSleep(&hcan1);

HAL_CAN_Stop(&hcan1);

LL_SPI_Disable(hspi1.Instance);

LL_SPI_Disable(hspi2.Instance);

LL_USART_Disable(huart1.Instance);

LL_USART_Disable(huart2.Instance);

LL_USART_Disable(huart4.Instance);

__HAL_RCC_SPI1_CLK_DISABLE();

__HAL_RCC_SPI2_CLK_DISABLE();

__HAL_RCC_CAN1_CLK_DISABLE();

__HAL_RCC_USART1_CLK_DISABLE();

__HAL_RCC_USART2_CLK_DISABLE();

__HAL_RCC_UART4_CLK_DISABLE();

__HAL_RCC_I2C1_CLK_DISABLE();

__HAL_RCC_I2C2_CLK_DISABLE();

__HAL_RCC_RTCAPB_CLK_DISABLE();

// Disable all used wakeup sources: WKUP pin

HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN2);

HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN3);

// Clear all related wakeup flags

/* Clear PWR wake up Flag */

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

__GPIOA_CLK_DISABLE();

__GPIOB_CLK_DISABLE();

__GPIOC_CLK_DISABLE();

__GPIOD_CLK_DISABLE();

__GPIOE_CLK_DISABLE();

__PWR_CLK_DISABLE();

SysTick->CTRL=0x00;

// HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN2);

// HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN3);

__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

HAL_PWR_EnterSTANDBYMode();

    This topic has been closed for replies.
    Best answer by Dick Lin

    Finally figured out the 2 mA was eaten by the JTAG/ST-LINK connection, Removed the JTAG connector will bring the power consumption down to 0.01 mA. Thx

    9 replies

    Dick Lin
    Dick LinAuthor
    Senior
    August 13, 2018

    It's interesting. Following GPIO clock disable code actually make system not going to standby mode. I am not sure what's happening. Thx

    __GPIOA_CLK_DISABLE();

    __GPIOB_CLK_DISABLE();

    __GPIOC_CLK_DISABLE();

    __GPIOD_CLK_DISABLE();

    __GPIOE_CLK_DISABLE();

    __PWR_CLK_DISABLE();

    SysTick->CTRL=0x00;

    Tesla DeLorean
    Tesla DeLorean
    Guru
    August 13, 2018

    Have you tried using an ammeter across the pins normally occupied by JP5? The IDD Jumper

    Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
    Dick Lin
    Dick LinAuthor
    Senior
    August 13, 2018

    I got 16 mA for both standby and shutdown mode. The value should be much lower. Is the config not right or something else ? Thx

    Dick Lin
    Dick LinAuthor
    Senior
    August 13, 2018

    Yeah, IDD works as expected, down to 0.38 mA in standby mode. Now I am moving to our own board, seems SPI disable function doesn't seems functional well. Thx

    Dick Lin
    Dick LinAuthor
    Senior
    August 14, 2018

    I can only go down to 2 mA for the standby mode for our board. I am not sure if there is anything missing.

    I am pretty sure the only thing power with 3.3 VL is the MCU. We removed external flash, EEPROM. No other component is powered.

    Any thoughts what might be missing?

    Thx

    Tesla DeLorean
    Tesla DeLorean
    Guru
    August 14, 2018

    Not really, I can't commit resources to low-power issues. You should talk with the FAE supporting your design, and perhaps contact the local sales office if your account doesn't have one.

    Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
    Dick Lin
    Dick LinAuthor
    Senior
    August 14, 2018

    One thing I am working on is the GPIO pin before going standby mode. Should I program it to RESET or high impedance or is this matter? Thx

    Dick Lin
    Dick LinAuthor
    Senior
    August 14, 2018

    One thing I noticed is the UART port. Even I already disable UART, CLOCK, the TX/RX pin still consume power. Not sure what's going on. Thx

    LL_USART_Disable(huart1.Instance);

    LL_USART_Disable(huart2.Instance);

    LL_USART_Disable(huart4.Instance);

    __HAL_RCC_SPI1_CLK_DISABLE();

    __HAL_RCC_SPI2_CLK_DISABLE();

    __HAL_RCC_CAN1_CLK_DISABLE();

    __HAL_RCC_USART1_CLK_DISABLE();

    __HAL_RCC_USART2_CLK_DISABLE();

    __HAL_RCC_UART4_CLK_DISABLE();

      // USART1 GPIO Configuration

      // PB6   ------> USART1_TX

      // PA10   ------> USART1_RX

    GPIO_InitStruct.Pin = GPIO_PIN_10;

    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

    GPIO_InitStruct.Pull = GPIO_NOPULL;

    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_6;

    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);

    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_RESET);

    Dick Lin
    Dick LinAuthorBest answer
    Senior
    August 16, 2018

    Finally figured out the 2 mA was eaten by the JTAG/ST-LINK connection, Removed the JTAG connector will bring the power consumption down to 0.01 mA. Thx

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