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VSP5612: vsp5612 register config

Yu Shulei
Prodigy 10 points
Part Number: VSP5612


Hi

   I have got some problem when I config vsp5612 registers。I hope someone could give me some suggestion。

   the config flow ：

   1. after power up delay a few seconds。

   2.write 0x00100 to 0x001, set RST_ALL bit

   3.delay 9ms, wait chip delay.

   4.write 0x20000 to 0x190, hold line_counter.

   5.config other register except XLSYNC_SEL and EN_OUT.

   6.write 0x00400 to 0x002, to all output enable, EN_OUT_1.

   7.write 0x10000 to 0x190, set active LS_CNT_RST to activate line counter.

  after config I cannot read anything from the register. 

is ther any problem?

  • 0
    TI__Expert 4920 points

    Hi Yu, 

    Welcome to E2E. 

    The behavior you are seeing is not expected. 

    1. Do you see same behavior across other VSP5612 devices? 

    2. Can you do a SPI read out of register 0x190 after step 4 and confirm that SPI read-write is indeed working? 

    3. What is the voltage swing of SPI lines? Using an oscilloscope, can you probe all SPI lines (including SDO/GPIO1 and SDO/GPIO2) after step 7? 

    Thanks,

    Karthik

  • 0 in reply to Karthik Nagabhushana
    Prodigy 10 points
    Karthik Nagabhushana said:
    devices

    1.There is no response from vsp5612, I have config the REF_AIN output 2.0V, but is still output 1.5V.

    2.I try to read out, and the chip output nothing.I probe the SDI and GPIO0/SDO.

    3.The SPI line is 3.3V, I have checked the SPI timing by  oscilloscope.

    Can I send you the SPI timing by email?

  • 0 in reply to Yu Shulei
    TI__Expert 4920 points

    Hi Yu, 

    1. Have you tried this on more than one VSP5612 device? Do you see the same behavior? 

    2. It seems to me that SPI write itself is not happening. I have sent you a mail, can you share your SPI read/write waveforms in that thread? 

    Thanks,

    Karthik