LMP91000: LMP91000EVM / ADC161S626 SPI Interface with Arduino DUE

Prakshaal Jain

Part Number: LMP91000
Other Parts Discussed in Thread: ADC161S626

Hello

I am using LMP91000EVM and trying to read the voltage out data.

i am able to change registers using i2c communication but am unable to read the data coming out from Dout pin, connected to miso pin in ICMA connector of arduino.

over 6 years ago

0 Kelvin Le THS over 6 years ago

TI__Expert 7035 points

Prakshaal,

Please perform a sanity check on your SPI code first. Do you have another device with SPI that you can test your SPI routines on?

-Kelvin

0 Prakshaal Jain over 6 years ago in reply to Kelvin Le THS

Prodigy 120 points

Kevin,

Thank you for your reply.
Unfortunately i don't have any other device with SPI routine.

I just want to map the bias sweep voltages from -0.6 to 0.6 volts and the vout.

0 Kelvin Le THS over 6 years ago in reply to Prakshaal Jain

TI__Expert 7035 points

Prakshaal,

Is this your first time trying out this SPI routine? I highly recommend verifying the SPI routine first on a simple device so you can easily narrow down the issue. The ADC161S626 is just an ADC. If you see a voltage at the input of the ADC you should be able to read a non-zero value. Have you check to see if the ADC is powered correctly?

-Kelvin

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LMP91000: LMP91000EVM / ADC161S626 SPI Interface with Arduino DUE