Howto: Low cost 1Gb of NVM for MQX (removable media not required)

[CarlFST60L]

We need around 1Gb of NVM for our application (based on 52259), it must not be able to be removed without a locking mechanism i.e. USB stick is no good. I can buy 1Gb SD Cards for a few dollars, so the price is right!

I noticed in another thread that MQX3.4 would support MFS for SD Cards. Is there an example on using an SD Card with MQX 3.4 with MFS? I believe the SD Card would need an SPI driver / wrapper before you can install MFS on it? Or is there a 'generic' driver that would work with SD Cards? Has anyone done this, or, can someone tell me how to get started? (my guess i need to use the MQXIOUG to work out how to make my driver, then install MFS on that)

I have never used MFS (beyond the demo) and have not worked directly with SD Cards, so I don't really know what road to go down, or where to start...

PS Currently we using the MRAM, but 512KB is way too small, and VERY expensive. I think MRAM is about USD$17 for 512KB (4Mbits).

Message Edited by CarlFST60L on 2009-11-12 09:59 AM

[PetrM · Accepted solution]

Hello,

yes, there's an example for MQX MFS SD card in 3.4 release which uses SD over SPI driver.

You can find the example in /mfs/examples/sdcard.

It's available for 52259 tower board, but in fact all you need is to wire QSPI pins and two other (protect, detect) to SD card slot.

Regards,

PetrM

[CarlFST60L]

Thanks Pete, I missed that example.