STM32F439 GPIO Initialization state

PV C · ‎2021-10-26

If we initialize the GPIO pin as Mode output pp, pull up and speed_fast using HAL_GPIO_Init() API then what will be the state of the GPIO pin when pin status is not set using HAL_GPIO_WritePin()

Peter BENSCH · ‎2021-10-26

The state is defined by the reset value of register GPIOx_ODR, which is by default 0x00000000, i.e. low (see RM0090, sections 8.3.4 and 8.4.6).

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/Peter

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