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Topic: SD card reader from GHI electronics uALFAT-SD (Read 1 time) previous topic - next topic

DOSER

Dear All,

I've tried almost everything to hook up my Arduino UNO and Duemilanove to the SD-Card reader uALFAT-SD from GHI electronics. But after many evenings and nights work, nothing. I still get the message that the program can't find the SD-card, of file, etc.

First of all I would like to know if anyone has ever succeded in connecting an Arduino to this board. I'm looking for a wire-diagram and a simple code, just to check is nothing/anything is wrong with the board.

Looking forward to hear from you.

Thanks.

DOSER

The uALFAT-SD board has a total of 16 connectors. As far I know these are the following pin's.

1 DATARDY
2 BUSY
3 I2C_SCL
4 I2C_SDA
5 SPI_SCK
6 SPI_MISO
7 SPI_MOSI
8 SPI_SSEL
9 MISC
10 CARD_DET
11 WAKE
12 VBAT
13 3.3 V POWER
14 RESET
15 GROUND
16 CARD_WP

Pin's 5, 6, 7 are easy. I found them in many post's, schedules and code.
Pin 8 however is, I think, the CS pin I came along several times. I'm not sure but I think this would be the selectpin.

I don't know if this board works without the power connection of pin 13 and 15. I've tried both situations.

Also I've tried different SD cards. The one I know is FAT32 formatted is a 2 Gbit micro-SD with a SD-adapter to fit in this board.

Some code will start initializing, but failing at the end. There is some communication, but it never comes beyond the initialization

As long as I will get a simple code to see if this board is working, I would be a step closer to the end of this project.

Looking forward to hear from you.

DOSER.

bigred1212

Did you figure this out?

Was VBAT something like "voltage battery" and a 5v pin?


fat16lib

VBAT is for a 3V battery to power the internal RTC. If the RTC is not needed, connect VBAT to 3.3V.  VBAT must be less than 3.6V.

DOSER

Alright, so not only pin 5 till 8 are needed. Also 13 and 15 for power. But 12 as well? Suggested by fat16lib?

I will try to test it with the 3.3 V connected to it.

Thanks DOSER.

bigred1212

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&ved=0CEEQFjAD&url=http%3A%2F%2Fwww.ghielectronics.com%2Fdownloads%2Fold%2FuALFAT%2FuALFAT-USB%2520and%2520uALFAT-SD.pdf&ei=-aMoUvjMMoaHygHj7YC4Bw&usg=AFQjCNGNaufzzHo7VLK3BdJ1uqek17etjg&bvm=bv.51773540,d.aWc

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CFQQFjAG&url=http%3A%2F%2Fwww.mouser.com%2Fcatalog%2Fspecsheets%2FuALFAT%2520Manual.pdf&ei=-aMoUvjMMoaHygHj7YC4Bw&usg=AFQjCNG9s0WlaXOjvE4d3zwF4RGigfZmjw&bvm=bv.51773540,d.aWc


DOSER

Thanks for the manuals. The big one I already found. The two page document is nice. I will look into it and hope to find the solution. Till now, I haven't had it working, but keep trying.

DOSER.

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