Hello everyone,
I made a board according to the dm355 IPNC reference design, but the audio doesn't work. The dev/dsp device cann't record or play sound.
The design uses the aic26 sound codec chip. But I found there's no mic biase voltage in my board. The datasheet said it should be 2.0V or 2.5V.
I've checked the spi command in the driver, there seems no problem.
The driver configs the audio chip as the master, but there's no clock signals in BCLK or LRCK.
The design only connects the MOSI pin to the processor, so I can't read the register.
The asp interface in the processor works fine.
I have no idea about the cause.
Any suggestion is very helpful.
Thanks!