I use `HAL_GPIO_Init()` to configure my GPIO pins, setting my `GPIO_InitTypeDef` structure initially to zero and then configuring the Pin, Mode, Pull and Speed parameters as I require but leaving Alternate at 0 since I do not want an Alternate function, I want a GPIO.
This works fine for all of my pins except for pin 0x0f which is pre-assigned to use Alternate function 0 (for JTAG): calling `HAL_GPIO_Init()` as described above does nothing useful for this pin, it never becomes the output I'm trying to make it (the pin remains firmly at 0 V when measured after having been set to high with `HAL_GPIO_WritePin()`). I guess this is because it is by default using Alternate function zero and somehow needs to be told NOT to use that Alternate function, to just be a GPIO please.
How do I achieve that? The config settings I am passing to `HAL_GPIO_Init()` to try to set this pin to be an open-drain output are as below.
Pin 0x8000
Mode 0x11
Pull 0x00
Speed 0x00
Alt 0x00
I've searched these forums and find mentions of functions/macros that disable JTAG but a search of the HAL (v1.25.0) for "jtag" finds no such functions. What am I missing?
