Posted on November 22, 2015 at 03:49I need to create UAC+CDC USB device. I have now two different projects with UAC and CDC implemented. How to organize them into composite device?My solution now is to describe device as 0x12, ...
Posted on November 23, 2015 at 10:29Note that default bootloader doesn't support encryption at all. You will have to transfer firmware over USB in open form.
Posted on November 19, 2015 at 14:59Composite device is not something impossible but requires much attention to modify standard examples. Different functions could be separated at interface level.
Posted on November 19, 2015 at 14:54With MSC (Mass Storage Class) host orders USB device to only read or write sectors. Due to this reason, smartphones or music players turn off internal access to the file system - to maintain filesystem consistency...
Posted on November 19, 2015 at 14:41Explicit feedback endpoint is a key to the asynchronous playback. With feedback provided data, host either resamples audio data or tunes the speed of playback. Otherwise, the MCU MUST lock its I2S masterclock to U...
Posted on November 16, 2015 at 17:15 Have you changed the maximum packet size for OUT endpoint to 180 bytes? I've just tested my code (for STM32F407) @1k sample rate and have seen blinking LED, showing audio packets with larger length. The sound w...
