who tested this circuit? https://www.oshonsoft.com/sdcard.php
To connect an SD card has a 16f876
because I did not manage to make it work, the scheme is correct
to the SD card (tested with Arduino), this just may be the
code.
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...
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.?
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.
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 ...
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