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ADS1299: READ ERROR

user5234117
Prodigy 80 points

Part Number: ADS1299

I used stm32 to communicate with ADS1299EVB, and separately sent the command to read ID, but there was no response. However, when I lowered the START pin and read 24Byte data continuously, I found that there was a response.However, the response data is not correct, because I have detected the DRDY pin. When the pin is low, I continuously pull down DIN to read the data. According to the description in the document, the first byte should be CXH, but the data I read now is fixed as 0xE0,0x00,0x00,0x02 for the first four bytes.

  • 0
    TI__Guru 68916 points
    Hello,

    Thank you for your post.

    We've provided an example start-up routine on page 62 of the data sheet. One of the first things that you need to do is to reset the device after power and master clock are established. There is more detail about the timing required for this Power-On Reset (POR) procedure on page 70. If you've followed the POR procedure correctly, then you should see /DRDY pulsing low at the default data rate.

    Once you have verified that /DRDY is pulsing, then you know the device is ready to be used. However, you must send the SDATAC command before any other commands are sent. This will tell the device to exit Read-Data Continuous Mode.

    Best Regards,