PCA9534: need program driver code

Cooper Zhang1

Expert 2190 points

Part Number: PCA9534
Other Parts Discussed in Thread: TCA9534

Dear ，

the customer choose PCA9534， could you kindly help me provide the driver code ?

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 317250 points

How to access the I²C bus depends on the microcontroller and the OS. We do not know which one you're using.

The PCA9534 (like many other I/O expanders) is so simple that usually there is no driver. You'd need a driver only if you wanted to use it through a more abstract GPIO framework.

+1 Danny Bacic over 3 years ago

TI__Mastermind 26806 points

Cooper,

Please also consider the TCA9534, which is a newer version of the PCA9534.

You can find I2C programming guidelines in the data sheet. Section 9.3.2.3 of the PCA9534 data sheet (and Section 8.6.3 of the TCA9534 data sheet) provides register descriptions that you can use in your I2C programming. We do not have drivers to provide since there are very few registers, and the method of implementation varies widely between different applications.

Best,

Danny

0 Cooper Zhang1 over 3 years ago in reply to Clemens Ladisch

Expert 2190 points

dear

Linux 4.4 driver

0 Danny Bacic over 3 years ago in reply to Cooper Zhang1

TI__Mastermind 26806 points

Cooper,

Unfortunately we do not have drivers to provide, even for Linux 4.4, for the TCA9534.

Best,

Danny

0 Cooper Zhang1 over 3 years ago in reply to Danny Bacic

Expert 2190 points

got it tks~

0 Clemens Ladisch over 3 years ago in reply to Cooper Zhang1

Guru 317250 points

Linux 4.4 is from January 2016 and no longer supported.

Anyway, even that old version has the gpio-pca953x driver built in.

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PCA9534: need program driver code