i.MX ProcessorsのトピックRe: Dpram reading on m7core

Dpram reading on m7core

adithya369 — Tue, 10 Jun 2025 16:17:01 GMT

Hi NXP support team,

I'm experiencing optimisation issues with reading DPRAM data on Verdin iMX8MP using the M7 core. Specifically, reading 40k locations takes around 300 milliseconds, while GPIO pin toggling takes 250 nanoseconds. With 16 address pins, 8 data pins, and 3 control pins, I'm struggling to achieve my target of reading 40k locations within 3 milliseconds. Can you provide guidance on optimizing the read performance or suggest alternative approaches to meet my requirements?

Re: Dpram reading on m7core

adithya369 — Wed, 11 Jun 2025 06:57:53 GMT

Hello Team,
Any suggestion would be appreciated.

Thanks & regards,
adithya.

Re: Dpram reading on m7core

Bio_TICFSL — Wed, 11 Jun 2025 16:16:06 GMT

Hello,

You can check with @toradex, but in general you can calibrate the DDR with this tool:

https://community.nxp.com/t5/i-MX-Processors/DDR4-calibration-amp-configuration/td-p/1409012

regards

Re: Dpram reading on m7core

adithya369 — Fri, 13 Jun 2025 06:03:38 GMT

Hello,
we want to place all code/data into TCM for the faster access. can you please provide me the linker script and also any relavant documentation to place the whole binary into TCM memory