ADS1192 as SPI slave with DA14580

Bharath G

Expert 1330 points

Other Parts Discussed in Thread: ADS1192

I am unable to read Device ID of ADS1192 connected to DA14580 (ARM CORTEX M0) using SPI.

ADS1192 is a slave here. I am getting different values every time.

I am using internal clock for ADS1192. Both are working in SPI mode 0. SPI clock is set at 1 MHz.

What might be going wrong?

over 9 years ago

0 Tom Hendrick over 9 years ago

TI__Guru**** 180961 points

Hi Bharath,

Please send along a screen capture of your SPI interface to the ADS1192. A schematic showing the connections between your host processor and the ADS1192 would be helpful as well.

0 Bharath G over 9 years ago in reply to Tom Hendrick

Expert 1330 points

Hi Tom,
Thanks for the reply. Here is the connection details as you asked.
drive.google.com/open

Host processor is working at 3.3v. Does voltage has any effect on this?

Regards
Bharath

0 Tom Hendrick over 9 years ago in reply to Bharath G

TI__Guru**** 180961 points

Can you also provide a screen shot from an oscilloscope or logic analyzer showing your SPI signals?

0 Bharath G over 9 years ago in reply to Tom Hendrick

Expert 1330 points

I do not have oscilloscope. I am getting DRDY interrupt when I make start pin active. When I send SDATAC command I still get the interrupt.

0 Tom Hendrick over 9 years ago in reply to Bharath G

TI__Guru**** 180961 points

Hi Bharath,

The vast majority of problems related to not being able to read registers is due to something in the SPI communication being 'wrong'. By the default settings of the ADS1192, you would get the DRDY signal so getting interrupts is a good start. To make sure you have the proper signals at the ADS1192 though, you'll have to find a way to verify the wave-forms using either a scope or a logic analyzer.

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ADS1192 as SPI slave with DA14580