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varo1111
varo1111
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August 27, 2020
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Waking up from stand-by mode with both rising and falling edge on wakeup pin.

  • August 27, 2020
  • 1 reply
  • 1406 views

I have a STM32G030K6T.

Right now I can wake up from standby with either wake up pin falling or rising edge. How can I use both of these edges to wake up the device from stand-by?

HAL_PWR_EnableWakeupPin documentation says

/**

 * @brief Enable the WakeUp PINx functionality.

 * @param WakeUpPinPolarity Specifies which Wake-Up pin to enable.

 *     This parameter can be one of the following legacy values which set

 *     the default polarity i.e. detection on high level (rising edge):

 *      @arg @ref PWR_WAKEUP_PIN1, PWR_WAKEUP_PIN2, PWR_WAKEUP_PIN4,

 *        PWR_WAKEUP_PIN5,PWR_WAKEUP_PIN6

 *     or one of the following value where the user can explicitly specify

 *     the enabled pin and the chosen polarity:

 *      @arg @ref PWR_WAKEUP_PIN1_HIGH or PWR_WAKEUP_PIN1_LOW

 *      @arg @ref PWR_WAKEUP_PIN2_HIGH or PWR_WAKEUP_PIN2_LOW

 *      @arg @ref PWR_WAKEUP_PIN4_HIGH or PWR_WAKEUP_PIN4_LOW

 *      @arg @ref PWR_WAKEUP_PIN5_HIGH or PWR_WAKEUP_PIN5_LOW

 *      @arg @ref PWR_WAKEUP_PIN6_HIGH or PWR_WAKEUP_PIN6_LOW

 * @note PWR_WAKEUP_PINx and PWR_WAKEUP_PINx_HIGH are equivalent.

 * @retval None

 */

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Best answer by TDK

You can't select both edges for wakeup. The hardware doesn't allow for it. Look at the PWR registers in the reference manual.

1 reply

TDK
TDKBest answer
August 27, 2020

You can't select both edges for wakeup. The hardware doesn't allow for it. Look at the PWR registers in the reference manual.

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