Nucleo-L452RE-P ALTERNATIVE FUNCTIONS Timer Direct Mode - Gpio Output

[MBertocchi]

Hi, I am experimenting with the Nucleo-L452RE-P the ALTERNATIVE FUNCTIONS of the PA6 pin, what I need is that the pin acquires a rising edge through the Timer Direct Mode generating INTERRUPT, this works correctly

void HAL_TIM_IC_CaptureCallback (TIM_HandleTypeDef * htim)

{

if (htim-> Channel == HAL_TIM_ACTIVE_CHANNEL_1)

{

     }

}

subsequently it must become a GPIO Output keeping the output low and I do this correctly by configuring the pin in this way:

static GPIO_InitTypeDef GPIO_InitStructA = {0,0,0,0,0};

GPIO_InitStructA.Pin = GPIO_PIN_6;

GPIO_InitStructA.Mode = GPIO_MODE_OUTPUT_OD; // Open drain

GPIO_InitStructA.Pull = GPIO_NOPULL;

GPIO_InitStructA.Speed = GPIO_SPEED_FREQ_LOW;

HAL_GPIO_Init (GPIOA, & GPIO_InitStructA);

   HAL_GPIO_WritePin (GPIOA, GPIO_PIN_6, GPIO_PIN_RESET);

Now I just have to find a way to reset the GPIO PA6 as a Timer Direct Mode to wait for a new rising edge, what can I do?

[MBertocchi · Accepted solution]

I solved my problem I did not set the ALTERNATIVE PROPERTY

GPIO_InitStructA.Pin = GPIO_PIN_6;

GPIO_InitStructA.Mode = GPIO_MODE_AF_OD;

GPIO_InitStructA.Alternate = GPIO_AF2_TIM3;

HAL_GPIO_Init (GPIOA, & GPIO_InitStructA);

[TDK]

You should also be setting the Speed attribute.

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