Hello all,
I have built up an ATmega32 and an SD card socket. The SD card is a Lexar Media 32MB card.
I have been following many souce code examples on how to read this SD card.
I have been able to read the CID and the CSD registers, and it seems to be reading correctly.
When I try to read a sector ( 0000 ) I wait for a "start data token"
0xfe, but it never comes.The psudo-code is:
lower CS, send 6 bytes of CMD17,0x00,0x00,0x00,0x00,0x95, wait for a response. ( anything not 0xff) raise CS (check for response = 0x00) lower CS again and wait for the data token (0xfe)
( send 0xff as a wait for token )
It times out waiting for the 0xfe.
I tried to not raise and lower CS in-between the CMD17 and waiting for the data token, but same result.
Any ideas why I do not see the data token ???
Thanks
Donald