AD7091R-8

Hello
I'm trying to set up communication with AD7091R-8. In setup I send following SPI command: 0X0CFF, 0X08FF, 0XFFFF, 0XFFFF, 0X00FF. Then I periodically send 0X0020 and I'm trying to read channel 5. I'd like to read one channeland them sequential readings. I inserted pictures from the logic analyzer into the attachment. I guess I'm getting bad data. Could you help me.

Thank you

Lukáš Mistr

attachments.zip
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  • Hi Jonathan,

    I still have a problem with readings of message. I have SPI mode 0 and I use MSBFIRST. Now I'm trying to read the data from the registers (address 0x00-0x09) and I have not success, because it does not go with the default values. My sending and receiving data: Send 0x03FF Read 0X01FE, Send 0x0BFF Read 0X0000, Send 0x13FF Read 0X0000, Send 0x1BFF Read 0X10C0, Send 0x23FF Read 0X0000, Send 0x2BFF Read 0X07F8, Send 0x33FF Read 0X0FFF,Send 0x3BFF Read 0X01FF, Send 0x43FF Read 0X0000,Send 0x4BFF Read 0X0FFF

    Any idea what is wrong?

    Regards,

    Mistr

Reply
  • Hi Jonathan,

    I still have a problem with readings of message. I have SPI mode 0 and I use MSBFIRST. Now I'm trying to read the data from the registers (address 0x00-0x09) and I have not success, because it does not go with the default values. My sending and receiving data: Send 0x03FF Read 0X01FE, Send 0x0BFF Read 0X0000, Send 0x13FF Read 0X0000, Send 0x1BFF Read 0X10C0, Send 0x23FF Read 0X0000, Send 0x2BFF Read 0X07F8, Send 0x33FF Read 0X0FFF,Send 0x3BFF Read 0X01FF, Send 0x43FF Read 0X0000,Send 0x4BFF Read 0X0FFF

    Any idea what is wrong?

    Regards,

    Mistr

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