nRF52 I2S Datahandler to buffer save.

RE: nRF52 I2S Datahandler to buffer save.

Kenneth — Wed, 08 Jan 2020 10:23:15 GMT

I do not have a good suggestion here, other than try and fail a bit. You may for instance have several buffers of 300bytes, and try to switch between them to see if anything helps. Maybe you need to increase the gain of the microphone.

Kenneth

RE: nRF52 I2S Datahandler to buffer save.

Empe — Wed, 08 Jan 2020 09:36:59 GMT

Yes.. i was tried to

play music front of mic and listen spk's side (checking log to check Count)

before 300 i can not hear anything

but after 300, i can hear "bzzzzz" sound and real-time music
(it mean's not a part of start point of music)

i dont't know why it happend

save method is wrong or write method is wrong/

RE: nRF52 I2S Datahandler to buffer save.

Kenneth — Wed, 08 Jan 2020 09:02:52 GMT

Have you tried to play some data from the end of the buffer when Count < 300?

I think maybe the codec in this case may go into some kind of weird/mute state if the output data is 0 for a period of time (which is not something that will occur in a real scenario).

Kenneth

RE: nRF52 I2S Datahandler to buffer save.

Empe — Wed, 08 Jan 2020 00:27:28 GMT

Thanks for reply.

when i check the log and scope.

during Count < 300 Only Rx Data come to and no Data on Tx Data line.

after 300, Rx Data still come to and some Tx Data going out to data line...

but i can hear only bzzzz sound

RE: nRF52 I2S Datahandler to buffer save.

Kenneth — Tue, 07 Jan 2020 15:01:07 GMT

What happens when Count wrap around (and start from 0 again, what does TX play then)?

Kenneth