topic usb host with CODEC(i2S) in LPC Microcontrollers

usb host with CODEC(i2S)

harry3 — Tue, 03 Feb 2026 09:37:48 GMT

hi NXP team，

我使用LPC5528开发一个项目， lpc5528 I2S RX 接收来自外接的I2S tx信号，通过USB输出数字信号给usb扬声器。这需要用到USB HOST+i2s 的组件方案。但是我在例程中没有找到这样的方案。请问可以提供一个这样的方案吗？

I'm developing a project using LPC5528. The LPC5528 I2S RX receives I2S TX signals from an external device, and outputs digital signals to a USB speaker via USB. This requires a solution using USB HOST + I2S components. However, I couldn't find such a solution in the example code. Could you provide a solution like this?

thanks

Re: usb host with CODEC(i2S)

carlos_o — Tue, 03 Feb 2026 17:55:02 GMT

Hi @harry3

Thanks for your post,

There is not a solution that accomplishes with the requirements you mentioned, but you could use as reference the examples of host_audio_speaker it has the options of bm or freertos (Included in SDK_25.12.00_LPCXpresso55S28).

Also, there are two examples of I2S one using DMA and the other using interrupts, please refer to these examples.

The final implementation is up to you, feel free to reach out with any questions in the developing process of the solution.

Re: usb host with CODEC(i2S)

harry3 — Fri, 06 Feb 2026 04:06:44 GMT

hi carlos
我现在开发这个项目遇到问题，我把CODEC的文件夹以及包含的文件拷贝到项目的目录下。在编译的时候总是提示在DEBUG文件夹没有找到我添加的文件夹。请问要添加文件夹需要怎么配置IDE呢？
I'm currently encountering a problem while developing this project. I copied the CODEC folder and its contained files into the project directory. During compilation, it always prompts that the folder I added cannot be found in the DEBUG folder. How do I need to configure the IDE to add the folder?

thanks
Harry

Re: usb host with CODEC(i2S)

carlos_o — Fri, 06 Feb 2026 16:55:24 GMT

Hi @harry3

Please also at the codec path to the MCU Assembler settings

let me know if this solves the issue.

Re: usb host with CODEC(i2S)

harry3 — Sat, 07 Feb 2026 07:55:19 GMT

hi carlos,

出这个问题的时候我已经是这样做的了。

I had already done it this way when this problem arose.

thanks

harry

Re: usb host with CODEC(i2S)

carlos_o — Mon, 09 Feb 2026 17:52:10 GMT

Hi @harry3

Thanks for clarifying.

Please also add the folder to Path and Symbols -> Source location to be recognized as a folder with source files:

You could confirm that the change make effect when the folder symbol has a blue C.

Re: usb host with CODEC(i2S)

harry3 — Wed, 11 Feb 2026 04:30:37 GMT

hi Carlos，

I'm very sorry that I made a mistake with the attachment just now. Please refer to this initial attachment.

thanks

harry

Re: usb host with CODEC(i2S)

harry3 — Wed, 11 Feb 2026 06:45:09 GMT

hi carlos,

Thank you very much for your support.

I just found the problem of MCLk having no output. I will further develop this project and will continue to consult you if I encounter any problems in the future.

thanks

harry