ChibiOS Free Embedded RTOS

That's great news! Maybe it's a straightforward issue.

I got it to mostly work, but still not 100% so I want to follow up on this. Let me send you a small app over the weekend. How did you format the card? I have the inkling that may have some influence. Not sure.

ian

I fix the crash too. My file saver thread stack size was too small. Now everything works BUT the 4Gb cards were writing in single block. When buffer the output data they start writing multiblock and fail with the timeout again. Oh well, works for now.

ian

Well... I fixed the DMA issue (there was some mismatch in the indexes inside the interrupt) but now I get ff to crash regularly. It's a bit late now but I'll come back to it tomorrow.

ian

Well... The good news is that it's mostly working

The bad news is that somehow I can't get both ADC3 and SDIO working at the same time (I'm sure it has to do with sharing the DMA2_Ch4_5 interrupt) but I'll keep pouncing at it. There is also a rare case in which fatfs breaks internally (i suspect ...

A quick clarification, the 100 Mb write and read tests were done with H2testw, a free utility to test disk I/O speed.

If this is a low level unfixable issue, would it be possible to have a version that uses single block writes? Sort of a hack but it would let me use high capacity cards.

ian

More data: In sdc.c line 186 there's a check for SD V2.0 which passes for the HC cards. Is that supposed to be in braces {} ? Without braces it falls trough and gets reset to SD V1.1 which then sets the ocr to 0x8... and then the initialization loop fails (gets stuck). If I add the braces the init ...

ianmga wrote: It seems that the PNY card should be good for my needs but I wish I understood the problem.

Actually, I guess not, since it fails sdConnect(). It works with the STLib functions.

I got a bunch of cards and ran tests and I'm not sure I understand what I see. They all work for the 1 Mb copy file test (copies a file in fread / fwrites of 512 bytes) using the fatfs with the STLib SD functions. However three SDHC 4Gb class 4 SD cards fail on sdConnect(). I am not sure if it's a ...

I'm going to try with a few different cards, don't worry about it. I was asking in case you had.