Other NXP ProductsのトピックTransfer audio data from USB host to another USB device

Transfer audio data from USB host to another USB device

vikingyuan — Wed, 27 Oct 2021 06:17:58 GMT

Hi,

I have the following setup with MIMXRT1060-EVK board:

RT1060 USB 1=> config as USB AUDIO , connect to host of PC

RT1060 USB 2=> config as USB host, a USB speaker is connected to this port

My target is that I can hear the voice input from the USB speaker on the speaker of "USB AUDIO", or redirect the input of USB speaker to the speaker of USB AUDIO.

I've tried to redirect the data input from USB speaker when writing to the SD card to the TX DMA buffer of USB AUDIO directly, but it seems doesn't work.

Is there any way I can do so?

Thanks!

Re: Transfer audio data from USB host to another USB device

jingpan — Mon, 01 Nov 2021 09:13:25 GMT

Hi @vikingyuan ,

Do you mean your speaker has a microphone, it can input voice. You want to pass this voice data to computer and save in a SD card?

Regards,

Jing

Re: Transfer audio data from USB host to another USB device

vikingyuan — Thu, 04 Nov 2021 05:39:22 GMT

@jingpan Thanks!

I want to redirect the voice data saved to the SD(evkmimxrt1060_host_audio_recorder_freertos) to another USB audio device I created.

Re: Transfer audio data from USB host to another USB device

jingpan — Fri, 05 Nov 2021 03:11:23 GMT

Hi @vikingyuan ,

So, you want to have two USB host on RT1060. The evkmimxrt1060_host_audio_recorder_freertos means rt1060 is a host. You want to send voice to another USB device, this means rt1060 act as a host too. You can refer to

https://community.nxp.com/t5/i-MX-RT-Knowledge-Base/Implementation-of-Dual-USB-Host-on-RT1060-EVK/ta-p/1321021

The project is a host_audio_recorder + host_audio_speaker. You can have a ping-pong buffer to save audio data. recorder fill the buffer and speaker get data from the buffer. That is better than send data to TX buffer directly.

Regards,

Jing

Re: Transfer audio data from USB host to another USB device

vikingyuan — Fri, 05 Nov 2021 05:05:55 GMT

Hi @jingpan

One host only, and the other one is configured as a USB device, which can be enumerated under Windows.

I connect a USB Microphone to the host, and would like to redirect the voice data to the USB device.

Re: Transfer audio data from USB host to another USB device

jingpan — Mon, 08 Nov 2021 03:21:13 GMT

Hi @vikingyuan ,

Host+Device is also possible on RT. The build step is similar to that guide. Or you can refer to https://community.nxp.com/t5/i-MX-RT/IMXRT1050-Using-both-USB-Host-and-USB-Device/m-p/1088500#comment-1326119

Between host and device. You need a buffer to temporary store data. This can make merging host and device project easier.

Regards,

Jing