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SDcard and Oshonsoft

Ian Rogers

User Extraordinaire
Forum Supporter
Most Helpful Member
I have only seen it working with a full sized 1G card.... Remember that an SD card pulls quite a lot of current and only works at 3v so make sure you have a 0.1uf cap across the power rail ( some suggest bigger 1uF~4.7uf ) and allow the card to suck up some amps...
 

ericgibbs

Well-Known Member
Most Helpful Member
hi g94,
I guess you are powering the PIC , LCD from +5V and the SD Card from 3.3V , also using the resistive voltage dividers between the PIC and SD lines.??

E

EDIT:

Do you get either of theses images of the LCD.?
 

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gold94

New Member
ericgibbs and ian rogers thank

I use the 3.3 v to the SD card and 5 v for 16f876 with divider bridges SDO SDI, I just put a 4.7 uf, and I tested with several 256meg SD card
1 g and 8g, some pictures.20150110_163408_resized.jpg 20150110_163424_resized.jpg 20150110_163435_resized_1.jpg
 

gold94

New Member
here is my LCD

20150110_165532_resized.jpg 20150110_165535_resized.jpg 20150110_165538_resized.jpg

but it does not have the expected result !! the display should send me the type of card (SDHC, SD ..) and the reading writing test is 0 ..

Thierry
 

gold94

New Member
hello

I have a special license pack1 functions.
with 18F4550 the result is the same,
the 18F4550 SPI protocol SDO = RC7, SDI = RB0, RB1 = CLK, CS = RA5
but may use other pin?
I just did the test with external 3.3V supply, failure ...

Thierry
 

gold94

New Member
Hello
I found ...... you just reverse SDO and SDI
RB0 = SDO, SDI = RC7, CLK = RB1, CS = RA5

thank you

Thierry
 

ericgibbs

Well-Known Member
Most Helpful Member
hi g94,
Was the crossed pair due to a program or circuit diagram error or was it your connection.?

If its an Oshonsoft error you should send Vladimir a Bug report.

E
 

gold94

New Member
the code is correct and the scheme too.
the problem we have to look at the scheme not to be mistaken.:wideyed:

Thank you all
and soon
  • ;)

Thierry
 

MauricioG

New Member
Hi all,
I managed to make the examples work, except for FAT16. With raw read / write and FAT32 everything work as expected (with the Vladimir´s wiring) but...for fat32 to work, I had to format the SD card with a formatting utility from SD; just formatting from the PC with windows utilities just didn´t go for me.
regards
Mauricio
 

ericgibbs

Well-Known Member
Most Helpful Member
hi M,
Thanks for the feedback.

I have ordered a few SD development toys so that I can try out Oshonsoft's SD

E
 

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