The disk I/O layer code for AVR used in this application note
(diskio_avr.c) is a modified version of a sample file available
from http://elm-chan.org/fsw/ff/pfsample.zip. The SD card settings described above are included in the initialization routine. The
hash defines for SPI pins and the functions for SPI initialization, transmit, and
receive may be reviewed for use with a device other than the tinyAVR 1-series and
modified if necessary. Use of the Petitfs library is demonstrated in the
'init_sd_card()' and 'send_buffer()' functions in
the main file.
pffconf.h file to save memory.