Fast GPIO Read / write in Toradex Verdin iMX8MP

[allan.tx]

Hi @tolvivek

@tolvivek

GPIO interface… we are able to read DPRAM data in Yocto linux using libgpiod… But the speed of reading is very slow…We tried with M7 SDK gpio driver example… But the speed of gpio is not matching with our requirement

You can refer to this thread’s discussion.
There seems to be some great discussion on this topic.

@ToradexAI

Direct register writes/read on M7 achieve about 250 ns per cycle for a read-modify-write sequence (realistic) (reference).

How to Improve GPIO Read Speed Using libgpiod for DPRAM Access on Verdin iMX8MP

I’m currently working on a Verdin iMX8MP-based project where I interface a dual-port RAM (DPRAM) using GPIOs. The DPRAM interface has: 16-bit address lines 8-bit data lines Control lines (OE, CE, etc.) I’m using the libgpiod library in C to read the data from DPRAM. The typical read operation includes: Writing an address via GPIOs. Asserting control signals. Reading 8-bit data via GPIO input lines. The issue I’m facing is performance. When I read 40,000 address locations, it takes approxim…

---

@tolvivek

I have installed MCUExpresso IDE… Can I get any document or user manual to configure this IDE for bare metal gpio programming for Toradex Verdin IMX8MP Cortex M7 core.

MCUXpresso Software and Tools