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delphi
delphi
Associate II
July 18, 2016
Question

STM32L476 SAI2 block B not working!

  • July 18, 2016
  • 10 replies
  • 2522 views
Posted on July 18, 2016 at 20:01

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    10 replies

    delphi
    delphiAuthor
    Associate II
    July 18, 2016
    Posted on July 18, 2016 at 20:04

    Please notice that debug was OK

    Codec is initiliased using the I2C good and then all callbacks was ok to start IT.

    Next day I can check signals with logic analyzer. 

    But know it is late bacause it is a software bug (or feature) of current HAL libary with the latest MX for L series

    delphi
    delphiAuthor
    Associate II
    July 19, 2016
    Posted on July 19, 2016 at 11:44

    Also notice the block B on SAI1 is working! I created an another tests and shoose different pins from B block. Anything was ok.

    delphi
    delphiAuthor
    Associate II
    July 19, 2016
    Posted on July 19, 2016 at 16:43

    Seems to be no answers. Then I created the support ticket and no answer too.

    Too bad to understand how boring is the stm32 development.

    delphi
    delphiAuthor
    Associate II
    July 19, 2016
    Posted on July 19, 2016 at 20:12

    I attached 2 files.

    In non working example with SAI2 you can see only MCLK and SCK.

    Another signals seems to be no (logic one everwhere).

    But in another picture with standard example everything is ok0690X00000602bmQAA.jpg0690X00000602brQAA.jpg

    delphi
    delphiAuthor
    Associate II
    July 20, 2016
    Posted on July 20, 2016 at 08:24

    Logic one - for I2C and reset - this is normal

    But other important lines are zero!

    delphi
    delphiAuthor
    Associate II
    July 21, 2016
    Posted on July 21, 2016 at 09:51

    Sorry. In the first message I gave an incorrect info about block B of SAI1. It is not working too with the same thing described in picture! You can see only near 700KHz bit clock signal and 6 Mhz input clock signal for codec. Codec init was succes on I2C but then the same situation is here too.0690X00000602bwQAA.jpg

    delphi
    delphiAuthor
    Associate II
    July 21, 2016
    Posted on July 21, 2016 at 09:58

    For B block tests I redefine the definitions in example to SAI:

    #define AUDIO_SAIx                           SAI1_Block_B

    #define AUDIO_SAIx_CLK_ENABLE()              __HAL_RCC_SAI1_CLK_ENABLE()

    #define AUDIO_SAIx_FS_GPIO_PORT              GPIOB

    #define AUDIO_SAIx_FS_AF                     GPIO_AF13_SAI1

    #define AUDIO_SAIx_FS_PIN                    GPIO_PIN_6

    #define AUDIO_SAIx_SCK_GPIO_PORT             GPIOB

    #define AUDIO_SAIx_SCK_AF                    GPIO_AF13_SAI1

    #define AUDIO_SAIx_SCK_PIN                   GPIO_PIN_3

    #define AUDIO_SAIx_SD_GPIO_PORT              GPIOB

    #define AUDIO_SAIx_SD_AF                     GPIO_AF13_SAI1

    #define AUDIO_SAIx_SD_PIN                    GPIO_PIN_5

    #define AUDIO_SAIx_MCLK_GPIO_PORT            GPIOB

    #define AUDIO_SAIx_MCLK_AF                   GPIO_AF13_SAI1

    #define AUDIO_SAIx_MCLK_PIN                  GPIO_PIN_4

       

    #define AUDIO_SAIx_MCLK_ENABLE()             __HAL_RCC_GPIOB_CLK_ENABLE()

    #define AUDIO_SAIx_SCK_ENABLE()              __HAL_RCC_GPIOB_CLK_ENABLE()

    #define AUDIO_SAIx_FS_ENABLE()               __HAL_RCC_GPIOB_CLK_ENABLE()

    #define AUDIO_SAIx_SD_ENABLE()               __HAL_RCC_GPIOB_CLK_ENABLE()

       

    delphi
    delphiAuthor
    Associate II
    July 21, 2016
    Posted on July 21, 2016 at 10:12

    I also cann't understand why I cann't choose the block B in cubeMX software to choose the master mode with clock output?0690X00000602cBQAQ.jpg

    delphi
    delphiAuthor
    Associate II
    July 21, 2016
    Posted on July 21, 2016 at 10:54

    To solve this problem I am downloading the cube mx and it is clear for me now that there is one feature not clear describe in docs. You must shoose the another dma channel. For B block - the 2nd or 7th of DMA2

    AvaTar
    AvaTar
    Senior III
    July 21, 2016
    Posted on July 21, 2016 at 11:29

    > To solve this problem I am downloading the cube mx and it is clear for me now that there is one feature not clear describe in docs. You must shoose the another dma channel. > For B block - the 2nd or 7th of DMA2

     

    Not sure <which> docs you mean - this fact is clearly documented in the DMA section of the Reference Manuals (in the form of a nice ''DMA channel vs. peripheral'' matrix).

    However, it would not surprise me if Cube doesn't do it right.

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