I2S - output main clock to codec
-
- Posts: 7
- Joined: Sat Jan 28, 2017 11:32 pm
I2S - output main clock to codec
Hello. I have reviewed the I2S driver API found in i2s.h, but I am still not sure about one detail. I need to output the a main clock (16.9344 MHz or 18.432 MHz) to my codec chip. I figured I would synthesize it with the Audio PLL and then configure the I/O mux to output the signal, but I can't find how to do this in the documentation. Am I on the right track? How do I do this?
-
- Posts: 9708
- Joined: Thu Nov 26, 2015 4:08 am
Re: I2S - output main clock to codec
Sorry, as is the audio PLL still is not documented. I also do not know if it's possible to route its output directly to a GPIO.
Re: I2S - output main clock to codec
As I can see in the new technical reference manual V1.5 the output of the master clock/apll output of both I2S peripherals should now be available via the IO_MUX to specific pin. I checked the actual pinmapping in the actual commit of IDF but I dont find the related i2sn_clk Makros for GPIO mapping documented in the io_mux_reg.h.
Can someone help with the related GPIO Pin and function_no for the mapping? Would be great
Can someone help with the related GPIO Pin and function_no for the mapping? Would be great
Who is online
Users browsing this forum: No registered users and 62 guests