Hi, I'm running the Angstrom on the Beagleboard and I'm trying to
find a way to
modify the audio rate register values to force sampling rates other
than 44.1
kHz and 48 kHz. Basically when I run "cat /sys/devices/platform/soc-
audio/codec_reg"
register 0x1 reads 0x91 which from the datasheet means the sampling
rate =
44.1kHz. I'm trying to set register 0x1 to 0x81 to force it to run at
32 kHz.
but the "echo 1 81 > codec_reg" command is apparently not supported
and from the
angstrom the register is read-only I even tried chmod +w the register
but that
didn't work.
I tried using debugfs to modify the register value unfortunately the
functionality isn't available through that. I found a few listings
online of
ALSA patches that expose the register during debugfs, after copying
and pasting
them I still couldn't access the register. When I tried modifying the
twl4030.c
driver in the openembedded directory linux-omap-2.6.28/git/audio/soc/
twl4030.c
by basically hardcoding the reigster value to 0x81 it still didn't
work.
I'm running the 2.6.28. can anyone share some advice ???
al fayez