On the Silicon Labs CP2615 USB-to-I2S Bridge EVB REV 1.0 board, the LEFT and RIGHT CODEC channels are reversed. This causes the LEFT and RIGHT audio channels to be reversed for audio playback and recording when using the default CP2615 configuration from Simplicity Xpress Configurator. Note that the board is shipped with this default configuration. This bug affects only REV 1.0 of the evaluation board, and will be fixed in subsequent board revisions.
This issue can be easily fixed using a CODEC setting that swaps the channels and is implemented by loading the CP2615 on the evaluation board with a slightly modified version of the default Simplicity Studio Xpress Configurator CP2615 configuration. To make these changes and swap the LEFT and RIGHT audio channels on the CP2615 USB-to-I2S Bridge EVB REV 1.0 board, please follow these instructions:
1) Ensure that the jumper on J5 of the board connects the “5V” (center) and “USB5V CP2112” (right) pins.
2) Ensure the jumper on JP1 is in the lower position, connecting the “LDO_EN” (center) and “ON” (lower) pins.
3) Ensure that the jumper on J4 in in the upper position, connecting the "5V" (upper) and "VREGIN" (middle) pins.
4) Ensure that jumpers are installed on J13, J14, J15, and J16.
5) Connect the board to a host computer running Simplicity Studio v4 using a USB mini cable connected to J18.
6) In Simplicity Studio, click [File] > [New] > [Xpress Configurator Project]
7) In the [Part] dropdown menu, select “CP2615-A01-GM” and click [Next]
8) Rename the project (optional), select a location (optional), and click [Finish]
9) Once the project loads in the Xpress Configurator perspective, scroll down in the [Configuration Groupings] window to [Codec: I2C Options] > [I2C Strings] > [Set Rate 44.1] and [Set Rate 48.0]
10) Change the second line in each of these two sections to read:
write(0xE2, [0x14, 0xF3])
11) Click [Save], then [Program to Device].
Following successful completion of step 10, the CP2615 on the EVB should be reconfigured to configure the CODEC to swap the LEFT and RIGHT audio channels.