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WL1837MOD: WL1837 DEBUG interface

Oleg Persidskiy
Prodigy 100 points
Part Number: WL1837MOD
Other Parts Discussed in Thread: WL1837, TPS65217

good day!

We faced with fatal problem. WL1837 IC does not work with Custom PCB.

By Oscilloscope, all signals exist (WL_CLK, WL_CMD, WL_EN etc.) during booting process, but something wrong.

how to use DEBUG WL interface & LOG to debug ? What UART  speed & etc. parameters.

thanks you!

  • 0
    TI__Mastermind 20285 points
    Hi,

    Can you please provide full kernel boot log?
    Is it beinging detected on the sdio bus on boot?

    debug log (using glogger) is only useful after the modules was probed already and the firmware was loaded over sdio and started running.

    BR,
    Eyal
  • 0 in reply to Eyal Reizer
    Prodigy 100 points

    Thank you. now clear DEBUG disabled on empty (no FW) device.

    Seems the possible problem from SDIO interface. please confirm.

    My log file: at point 3.042827 the SDIO communication runs for ~ 200 ms (two osc. screenshots below)

    [    3.016927] ThumbEE CPU extension supported.

    [    3.021311] Registering SWP/SWPB emulation handler

    [    3.027283] registered taskstats version 1

    [    3.031616] zswap: loaded using pool lzo/zbud

    [    3.038034] Btrfs loaded, crc32c=crc32c-generic

    [    3.042827] mmc2: error -84 whilst initialising SDIO card

    [    3.146136] Key type encrypted registered

    [    3.194082] input: tps65217_pwr_but as /devices/platform/ocp/44e0b000.i2c/i2c-0/0-0024/tps65217-pwrbutton/input/input0

    [    3.205408] tps65217 0-0024: TPS65217 ID 0xe version 1.2

    [    3.211259] at24 0-0050: 32768 byte 24c256 EEPROM, writable, 1 bytes/write

    Oscilloscope screenshot at point 3.042827 for lines WL_EN & WL_CLK from CPU:

    Also, for lines WL_EN & WL_CMD the negotiation is success:

    Where I can found full communication PROTOCOL specification to check the error / broken  packets ?

    Thank you!

  • 0 in reply to Oleg Persidskiy
    TI__Mastermind 20285 points
    Hi,
    I have assigned this to our hardware lead so he takes a look at it.
    Please expect some delay here due to the holidays.
    BR,
    Eyal
  • 0
    TI__Genius 12260 points
    Hi Oleg,

    Can you please provide me with the layout, BOM and schematic for review. I would like to start here to see if there are any issues. You can send me the information via e-mail to rizwan.murji@ti.com.

    Thanks,
    Riz
  • 0 in reply to Rizwan Murji
    TI__Genius 12260 points
    Hi Oleg,

    I just wanted to follow up if you still are facing an issue. I did not receive anything in my inbox as of yet. If you still required a review of the BOM and schematic, please send the information to me via e-mail. Please past a link to this e2e thread I the e-mail for tracking purposes.

    Thanks,
    Riz
  • 0 in reply to Rizwan Murji
    Prodigy 140 points
    Hi dear Rizwan Murji.
    seems EMC hw issue because long signal lines.
    solved , thanks you!
    Now I prepare next version of PCB. I will write here if same problem will occur again.