Dear All,
Has anyone been successful in initialising, reading and writing to an SD card using ccs ex_fat.c? This topic has been discussed many times before but I can't find someone who has successfully used all the above functions
I am using a PIC18F 3.3V microcontroller. Have made changes to mmc and fat drivers as Andrew has mentioned but my SD card just can't initialise :(
Any help will be greatly appreciated.
Ttelmah
Joined: 11 Mar 2010 Posts: 19360
Posted: Sat Mar 17, 2012 2:50 am
Yes, used them on several occasions without problems.
Things needed:
1) Tweak to handle cards that have an offset start address - patches posted here, or ensure the cards are formatted by the PIC itself.
2) Avoid cards 4GB or larger.
3) Correct level translation if using 5v - much easier using 3.3v as you are.
4) Remember you still need the pull-up resistors, even when using 3.3v. Missing these is a classic.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum