boards: pic32-clicker: check for periph_uart

[basilfx]

Contribution description

If there is no dependency on periph_uart, then uart_init is not available. This ensure that this will compile fine if periph_uart is not available.

Testing procedure

Not sure how to test it, but Murdock would fail without this patch in #10741. I also don't have the hardware to test it on real hardware.

Issues/PRs references

#10741

[aabadie]

IIUC, the whole stuff should be removed.

[aabadie]

@basilfx, the right fix is to do the same as what was done in #12256 but for the pic32-clicker.

[francois-berder]

@basilfx, the right fix is to do the same as what was done in #12256 but for the pic32-clicker.

Indeed that would be better. For now, UART is broken on pic32-clicker.
I was working on refactoring UART (available at https://github.com/francois-berder/RIOT/tree/pic32-uart) but I did not have enough time to complete my work. That would fix the issue you are describing. I do intend to finish this refactoring in the next few weeks and open a PR.

[basilfx]

@francois-berder @aabadie Would it then be OK to merge this in the mean time? It would otherwise block #10741, and the change itself isn't that big :-)

[francois-berder]

@basilfx OK for me. I will remove these lines anyway in my PR.

[kaspar030]

Ok, then let's go!

[kaspar030]

ACK.

[aabadie]

I disagree with the proposed fix here: quick and dirty. It should take 5 minutes to handle this correctly, at least like it's done for the pic32-wifire. If none of you wants to do it, I can open a PR.

"Let's do it right this time" (TM)

[kaspar030]

I disagree with the proposed fix here: quick and dirty. It should take 5 minutes to handle this correctly, at least like it's done for the pic32-wifire. If none of you wants to do it, I can open a PR.

I'd say feel free, but I assumed that @francois-berder is already working on that:

@basilfx OK for me. I will remove these lines anyway in my PR.

So yes, this is a dirty quick fix so we can move on with #10741, with a proper fix in the queue.

[aabadie]

I do intend to finish this refactoring in the next few weeks and open a PR.

If you don't mind @francois-berder, I'll spend these 5 minutes now and will avoid us to wait a few weeks. Hope this is fine.

[aabadie]

Please consider #12768 instead of this PR.