topic Re: Transfer IMX6 audio data to fpga over EIM bus in i.MX Processors

Transfer IMX6 audio data to fpga over EIM bus

sumish_ks — Thu, 06 Dec 2018 07:13:17 GMT

Hello,

I am working on a imx6q custom board and using freescale linux kernel 3.14.52 .

I want to send and receive audio data from sgtl5000 codec connected to SSI interface of imx6 to an FPGA via EIM. What would be the best way to do that ?

Thanks and regards,

Sumish

Re: Transfer IMX6 audio data to fpga over EIM bus

igorpadykov — Fri, 07 Dec 2018 00:25:51 GMT

Hi Sumish

one can check Chapter 28 Advanced Linux Sound Architecture (ALSA) System
on a Chip (ASoC) Sound Driver attached Linux Manual for linux sound subsystem description.

Data from fpga can be written to file, then played using examples in

imx-test (./mxc_sound_test) package
www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.7.tar.gz

Best regards
igor
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Re: Transfer IMX6 audio data to fpga over EIM bus

sumish_ks — Fri, 07 Dec 2018 04:57:06 GMT

Hi igor,

Thanks a lot. To send continuous audio data from audio codec to fpga through EIM, can I use the same approach as you mentioned for the data received from fpga (for e.g. writing to a file first then send it to fpga)? Please note that we are sending/receiving continuous audio data.

Regards,

Sumish

Re: Transfer IMX6 audio data to fpga over EIM bus

igorpadykov — Sat, 08 Dec 2018 03:39:52 GMT

Hi Sumish

I think this is posiible, consider changing writing audio data to memory

circular buffer instead file.

Best regards
igor

Re: Transfer IMX6 audio data to fpga over EIM bus

sumish_ks — Mon, 10 Dec 2018 10:44:59 GMT

Thanks igor.