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ADS1282

Bernd Boemer
Prodigy 110 points

Other Parts Discussed in Thread: ADS1282

Hello,

One question please. That must I send to the ad converter to toogle the channel form 0 to 1.

I send eith the SPI bus (HEX) 0x42, 0x00,0x18,0xFF and then 0x42,0x00,0x08,0xFF. Then I send these commands, I can  read the output at the same time ?

Thanks

Bernd

 

  • 0
    TI__Guru**** 182731 points

    Hi Bernd,

    For the ADS1282, you should be able to change between the two channels with the 0x42, 0x00, 0x18 or 0x08 commands.  Not so sure about that 0xFF though - I believe that shoud be an RDATA command (0x12) followed by 32 clocks to retrieve the conversion data.  We'll get you more info ASAP.

  • 0 in reply to Tom Hendrick
    TI__Guru**** 182731 points

    Hi Bernd,

    Sorry for the delay here - just realized I forgot to post back regarding your ADS1282 command set. 

    The sequence we normally use is 0x42, 0x00, 0x08 for CH1 (0x18 for CH2 - assuming CHOP is on and Gain =1) followed by SDATAC or 0x11.  The code we have for the ADS1282EVM assumes the part is in RDATAC mode.  If you were just doing one shot reads, you would need to use the RDATA command.  When reading back data, we transmit 0x88 thru the SPI (4x) to generate the necessary sclks.  The attached document has some screen shots.

     

    Command set.doc
  • 0 in reply to Tom Hendrick
    Prodigy 110 points

    Hello Hendrik

    thank you for your email. I just found my mistake, the SPI TRANSFER Format was not ok.. CPOL,CPHA.

    Now I will test the EVAL Board with new software .

    When I have any new question, I ask you again. Thanks

    Bernd