stm32f769 dsi application problems

[cherry li]

Posted on May 23, 2018 at 04:41

Dear:

   I am working on STM32F769 development board with the dsi unit.

   I set the dsi clk to non-continuous mode and set dsi to LP command mode.

  Then I  inited  the dsi module and started the DSI calling the the function HAL_DSI_Start(), there was something wrong with the clk lane. When the function HAL_DSI_Start() is called, sometimes the clk lane went into HS mode but there was no data on the data lane. It does not happen each time.

    I don't know why and how to solve the problem or explain it.

    Any help would be greatly appreciated. I am looking forward for you reply.

[Nesrine M_O]

Posted on May 23, 2018 at 10:07

Hi

cherry.li

,

• You are using ST board or a custom board?
• I recommend you to have a look to

  http://www.st.com/content/ccc/resource/technical/document/application_note/group0/1d/b8/33/4f/dc/0a/45/52/DM00287601/files/DM002876pdf/jcr:content/translations/en.DM002876pdf

  about DSI Host on STM32F469/479, STM32F7x8/x9 and STM32L4R9/S9 MCUsA set of example also are provided in STM32F4 cube firmware package :

1. STM32Cube_FW_F7_V1.0\Projects\STM32F769I_EVAL\Examples\LCD_DSI
2. STM32Cube_FW_F7_V1.0\Projects\STM32F769I_EVAL\Applications\Display\LCD_DSI_ImagesSlider

-Nesrine-

[cherry li]

Posted on May 24, 2018 at 09:15

Dear:

Thanks for your reply.

I am using ST board. I will have a look to

/external-link.jspa?url=http%3A%2F%2Fwww.st.com%2Fcontent%2Fccc%2Fresource%2Ftechnical%2Fdocument%2Fapplication_note%2Fgroup0%2F1d%2Fb8%2F33%2F4f%2Fdc%2F0a%2F45%2F52%2FDM00287601%2Ffiles%2FDM002876pdf%2Fjcr%3Acontent%2Ftranslations%2Fen.DM002876pdf

and the examples\LCD_DSI carefully again.

I have another question here:

The voltage of the gpio is 3.3v. Can I adjust the gpio output volgate to 1.8v? How to make the adjustment?