PROCESSOR-SDK-AM62X: Writing to GPIO pins

Neil Wilson

Prodigy 85 points

Part Number: PROCESSOR-SDK-AM62X

Tool/software:

Is there a simple example for setting/clearing a GPIO pin from Linux using memory address access on the AM6232 ?

I need to enable some GPIOs eg 77 & 91 within a driver startup but want to access them before the gpio layer starts.

I presume I need to access direction/set/clear registers ?

Regards

Neil

3 months ago

0 Qutaiba Saleh 3 months ago

TI__Expert 4360 points

Hi Neil, the expert of the topic is out of office. Expect a response next week.

Regards,

+1 Anshu Madwesh 3 months ago in reply to Qutaiba Saleh

TI__Genius 17270 points

Hi Neil,

For GPIOs at the register level, the AM62x TRM has an example of the process for setting a GPIO. Refer to Section 12.2.1.4.2 GPIO Function in the TRM: https://www.ti.com/lit/pdf/spruiv7

Section 14.8.2.1 GPIO Registers has the register list and their addresses.

Best Regards,

Anshu

+1 Anshu Madwesh 3 months ago in reply to Anshu Madwesh

TI__Genius 17270 points

Hi Neil,

Forgot to mention, devmem2 is useful userspace tool to read/write registers.

Best Regards,

Anshu

The TI E2E™ design support forums will undergo maintenance from July 11 to July 13. If you need design support during this time, open a new support request with our customer support center.

Processors

Processors forum

PROCESSOR-SDK-AM62X: Writing to GPIO pins