Trouble using SD Card

MIOS programming (C)
1

Hallo Community!

I’ve been messing around with the SD-Card feature of MIOS32. I soldered a quick and dirty connector for SD Cards and plugged it into J16 on my core32. However, it seems not to be right how I did it.

Some details:

I “jumped” the jumper next to J16 to 3.3V. I uploaded the sdcard test app from the mios32 svn (compiled with some warnings, but seemed to be ok). On startup it promts me to press a button. Doing so, it answers

[19935.257] Abort on connect, error code: 0

Meaning the card is not available. I double-checked the wires and connector, but it looks fine. The card is a sandisk 2GB card, formatted to 512B-clusters using win7.

Anyone an idea?

Thank you,

Bääääär

2

Did you take out the SIL resistor R30 on J16, this not required when using the SD card. Took me a while to figure that one out.

Tim.

3

OMG, yes, that’s it! Thank you so much :hug: Maybe TK could add a short hint to ucapps.de, so other people having trouble can see why

4

It is shown quite clearly here : http://ucapps.de/midibox_seq/mbseq_v4_interconnections.pdf but then if you are not building the mbseq it is easily missed.

Glad that solved your problem.

Tim

5

I must say that I haven’t expected that R30 could disturb serial transfers to the SD Card - I will add a comment!

Best Regards, Thorsten.