Re: [PATCH 0/3] Add device DM163 (led driver, matrix colors shield & display)

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

Hi Inès,

On 26/1/24 20:31, Inès Varhol wrote:
> This device implements the IM120417002 colors shield v1.1 for Arduino
> (which relies on the DM163 8x3-channel led driving logic) and features
> a simple display of an 8x8 RGB matrix.
> 
> This color shield can be plugged on the Arduino board (or the
> B-L475E-IOT01A board) to drive an 8x8 RGB led matrix.

Nice. Do you have an example? Or better, a test :)

> This RGB led matrix takes advantage of retinal persistance to
> seemingly display different colors in each row.
> 
> It'd be convenient to set the QEMU console's refresh rate
> in order to ensure that the delay before turning off rows
> (2 frames currently) isn't too short. However
> `dpy_ui_info_supported(s->console)` can't be used.

Cc'ing Marc-André Lureau.

> I saw that Kconfig configurable components aren't visible in C files,
> does that mean it's impossible to make the DM163 device optional when
> using the B-L475E-IOT01A board?

You could (but shouldn't) use for build-time:

   #include CONFIG_DEVICES

But better at run-time using [module_]object_class_by_name().

> Based-on: 20240123122505.516393-1-ines.varhol@telecom-paris.fr
> ([PATCH v3 0/3] Add device STM32L4x5 GPIO)
> 
> Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
> Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
> 
> Inès Varhol (3):
>    hw/display : Add device DM163
>    hw/arm : Connect DM163 to STM32L4x5
>    tests/qtest : Add testcase for DM163