HIgh speed parallel GPIO read

Rejina Choi14

Is it possible to read GPIO (ie: the address) using sDMA, as I found that there is no DMA request line for the peripheral GPIO (from techinical reference manual pg 2329) ?

over 10 years ago

0 Cvetolin Shulev-XID over 10 years ago

TI__Guru 65405 points

Hi Rejina,

It is possible. You can find some useful details about GPIO read/write and IRQ handling in the linked article:
processors.wiki.ti.com/.../Linux_PSP_GPIO_Driver_Guide

BR
Tsvetolin Shulev

0 Rejina Choi14 over 10 years ago in reply to Cvetolin Shulev-XID

Prodigy 130 points

As my application is to interface high speed converter to the processor, I would like to use DMA to read say 32 bit of parallel digital data. However, the article is mostly on accessing GPIO driver from user space., it doesn't explicitly outline the DMA function.

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HIgh speed parallel GPIO read