ly more critical problem for our
> implementation at Elektroline.cz company is DMA support for U(S)ART. That
> will also be a nice way to find if there are some further DMA TX bugs.
>
> Best regards,
> Michal Lenc
>
> -- Původní e-mail --
> Od: Simon Filgis
ice way to find if there are some further DMA TX bugs.
Best regards,
Michal Lenc
-- Původní e-mail --
Od: Simon Filgis
Komu: dev@nuttx.apache.org
Datum: 14. 2. 2022 16:33:32
Předmět: Re: SPI with DMA on SAME70
"Dear all,
I started to follow up this topic.
Found that one
Dear all,
I started to follow up this topic.
Found that one in sam_hsmci.c:
/* There is some unresolved issue with the SAMV7 DMA. TX DMA is currently
* disabled.
*/
#undef HSCMI_NORXDMA /* Define to disable RX DMA */
*#define HSCMI_NOTXDMA1 /* Define to disable TX
into sam_afec.c file, the DMA is working fine
> there. Hope this helps.
>
> Best regards,
> Michal Lenc
>
> ------ Původní e-mail --
> Od: Simon Filgis
> Komu: dev@nuttx.apache.org
> Datum: 8. 2. 2022 11:52:38
> Předmět: SPI with DMA on SAME70
> "Dear all,
ut it could be one of the
problems.
You can also take a look into sam_afec.c file, the DMA is working fine
there. Hope this helps.
Best regards,
Michal Lenc
-- Původní e-mail --
Od: Simon Filgis
Komu: dev@nuttx.apache.org
Datum: 8. 2. 2022 11:52:38
Předmět: SPI with DMA on S
Dear all,
I'm using ST7789.c in combination with lvgl-lib.
The bottleneck to the display is the SPI communication. But even if I
increase the SPI frequency to 24MHz, it does not get faster. This is
because of constant delay between the bytes.
I guessed that this can be improved using DMA. But th
