[PATCH] STM32H743ZI Nucleo and basic lwIP support

[Robin Müller]

I'm sorry I have to dig this up and bother you again but it's something
that i spotted when browsing the STM CubeH7 code and which is a similar
problem to the UART3 issue and might affect NUCLEO users who would like to
use libbsd networking.
Similarly to the UART3, the pins for the ETH initialization seem to be
different for the NUCLEO device.

More specifically, the code for the NUCLEO-H743ZI looks like this:

  /* Configure PA1, PA2 and PA7 */
  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStructure.Pull = GPIO_NOPULL;
  GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
  GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure PB13 */
  GPIO_InitStructure.Pin = GPIO_PIN_13;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Configure PC1, PC4 and PC5 */
  GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PG2, PG11, PG13 and PG14 */
  GPIO_InitStructure.Pin =  GPIO_PIN_2 | GPIO_PIN_11 | GPIO_PIN_13;
  HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);

So instead of GPIOA 1,2 and 7, GPIOG 11, 12 and 13 and GPIOC 1, 4, 5, the
pins above are used.

KInd Regards
Robin

On Mon, 12 Apr 2021 at 11:23, Robin Müller <robin.mueller.m at gmail.com>
wrote:

> I can split up the rest of the patch.
> I would rename STM32H7_ADD_LWIP from the BSP configuration to
> RTEMS_USE_LWIP as a more generic variant which could be reused for other
> BSPs if that is okay.
>
> Kind Regards
> Robin
>
> On Mon, 12 Apr 2021 at 10:46, Robin Müller <robin.mueller.m at gmail.com>
> wrote:
>
>> The variant worked without issues.
>>
>> Kind Regards
>> Robin
>>
>> On Fri, 9 Apr 2021 at 09:21, Robin Müller <robin.mueller.m at gmail.com>
>> wrote:
>>
>>> Hello Sebastian,
>>>
>>> I will have a look at it soon.
>>>
>>> Kind Regards
>>> Robin
>>>
>>> On Tue, 6 Apr 2021 at 10:01, Sebastian Huber <
>>> sebastian.huber at embedded-brains.de> wrote:
>>>
>>>> Hello Robin,
>>>>
>>>> sorry for the delay. I checked in some patches to add a
>>>> "arm/nucleo-h743zi" BSP variant. Could you please check if this variant
>>>> works on the board.
>>>>
>>>> Could you please split up the remaining pieces of the patch into
>>>> separate commits.
>>>>
>>>> --
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>>>> Germany
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