AM1808 how to use MCASP receiver

The McASP driver in the kernel supports simultaneous capture and playback. If you developing your own driver you can use that as a reference.

Regards,

Vaibhav

Hi, Vaibhav:

thanks for the input, but how could I use the capture function while the /dev/snd/ just mount for one codec connect to the transmit port? I just wanna use the driver, so any way to test ?

Best regards,

Power Pan

You can use arecord and aplay simultaneously. Both of these are part of the alsa-utils package.

Have you looked at the user-guide for the SoC on http://processors.wiki.ti.com/index.php

Regards,
Vaibhav

Hi, Vaibhav,

thank you for the information.

I read the user-guide already cause TI's board doesn't provide any hardware that could do this so I had to make my own board that could provide the hardware, but now I don't know if I have to modify the driver before I could do the recording cause in snd dir, only has below devices

# ls /dev/snd

controlC0  pcmC0D0c   pcmC0D0p   timer

don't know how to modify the code to make another capture port for MCASP.

might be still I did not make myself clear enough for what I need. I use a codec like TI's evb does and connect an I2S output FM radio to MCASP0 receive master clock /bit clock/frame sync and AXRn, as the datasheet describes, the chip could have 2 set of clock typically for upsampling playback. so tell me how I could map that input port out ?

Best regards,

Power Pan