mjb/altos/src/drivers/ao_sdcard.c, branch with-pdclib

altos: Make SD card driver compile without radio support

2013-04-26T04:25:39+00:00

The SD card driver blocks the radio when trying to access the card as that operation appears very sensitive to RFI. This fix makes the driver work when there *isn't* a radio driver in the same device. Signed-off-by: Keith Packard

altos: Delay while waking up SD card a bit

2013-04-12T08:55:33+00:00

This seems to make bringing the card from idle to ready mode more reliable. If you spam the card with requests, it will eventually whinge and shut down communications. Signed-off-by: Keith Packard

altos: Shorten SD initialization timeouts.

2013-04-02T23:41:29+00:00

This makes failure when no card is present much quicker. Signed-off-by: Keith Packard

altos: Horrible kludge -- disable radio while talking with SD card

2013-04-01T09:39:35+00:00

The SD card really doesn't like the RFI generated by our enormous radio, so just lock the radio out while working with the card. Signed-off-by: Keith Packard

altos: Retry SD card I/O. Use time for timeouts instead of counts

2013-04-01T09:08:18+00:00

Sometimes I/O operations may fail; give the card a chance and retry the operation in case it works the next time. Replace the loop counts with loops that check the clock so that they'll have consistent timeouts even if the CPU or SPI speed changes. Signed-off-by: Keith Packard

altos: Add sdcard read/write tracing

2013-03-31T19:23:31+00:00

This just dumps info in trace mode about read and write commands Signed-off-by: Keith Packard

altos: Add SD card writing function

2013-03-31T17:35:47+00:00

Now that the FAT code seems to be operational, go back and add SD writing. Signed-off-by: Keith Packard

altos: Add SDCARD and FAT16 filesystem support

2013-03-27T08:12:33+00:00

This adds a fairly primitive FAT16 file system implementation along with support for SD cards. Signed-off-by: Keith Packard