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read data from lmp90100

Harel tur
Prodigy 70 points
Other Parts Discussed in Thread: LMP90100

I try to read some registers from lmp90100 via spi bus , but always i recived  '0'. what  or where its the problem?

  • 0
    TI__Expert 3350 points

    Please initially check the SPI signal integrity using a scope to make sure that the command signals are not corrupted. This was the case with a recent similar posting. Also please make sure that the device is active and is not in the standby mode. After checking the vital signs to make sure that there is no hardware issue with your setup, please read  the application note SNAA075A (AN-2181 Microcontroller Firmware Considerations for National LMP90100 Sensor AFE) at the following link to make sure that the firmware is configuring the LMP90100 properly for the intended operation.

    http://www.ti.com/product/LMP90100/technicaldocuments