Add simulator for SD card driver, plus add stubs for SPI and PFF
primarily to prevent the on-device code from being picked up by
the makefiles for the simulator.
Formerly we took efforts to read only small chunks into a
(small) buffer, just to read this buffer byte by byte yet
again for parsing. It's more efficient and requires less
code to parse the character at read time directly. This
way we can read in chunks of exactly one line, making the
buffer obsolete.
First step is to implement this in mendel.c and in sd.c/.h.
This gets rid of the buffer already.
Very inefficient in pff.c and pff_diskio.c so far, more
than 40 minutes / less than 500 bytes/s for reading this
1 MB comments file. Reason is, for every single byte a
whole sector is read. Nevertheless, this attempt appears
to be on the right track.
Binary is 156 bytes smaller, 16 bytes less RAM:
ATmega... '168 '328(P) '644(P) '1280
FLASH: 22052 bytes 153.82% 71.78% 34.73% 17.09%
RAM: 1331 bytes 129.98% 64.99% 32.50% 16.25%
EEPROM: 32 bytes 3.12% 1.56% 1.56% 0.78%
Some modifications to avoid file name conflicts with other parts and
make it compile. As the glue code to the hardware (spi.c/.h) is
still missing, there are a few warnings, of course.
Changes to this library are tracked in pff.c.
Phil Hord
Markus Hitter