ADC121S051: Linux Kernel Subsystem

Heiko Günther

Part Number: ADC121S051

Hello,

I stumbled upon the tiny ADC121S051 (12Bit, 200...500 ksps) and need some Linux support for it. I found some ADS-Drivers in the Linux device driver section, but most are multiplexed devices.
Can someone tell me how to get to a working driver easily? What should be the basis of this driver? Maybe even a generic SPI-driver would work also?
Any pointer in the right direction or to some information would be helpful.

Thank you,
Heiko

over 3 years ago

0 PedroGelabert over 3 years ago

TI__Expert 6995 points

Heiko,

We do not specifically have a Linux Driver for the ADX121S051. These typically belong of the category of Industrial I/O in the ADC linux driver directory. As you have already discovered, most of these drivers are more complex devices that have several multiplexed inputs. You can take one of two approaches,

start with one of those drivers and remove functionality
or take one of the simple SPI drivers adcxx.c that are in the Hardware monitor section of the linux driver directory. This has the basic SPI data transfer and are typically used for low speed ADCs used with temperature sensors.

The second option seems the quickest for these simpler devices. This page describes the Linux Hardware Monitor API.

Best regards,
Pedro

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ADC121S051: Linux Kernel Subsystem