Do the following to run the demonstration:

1. Using the BM64_bootloader application, if you have not done so, configure the BM64 as an I2S slave device and give it a unique device name. (If using the BTADK for this project, you will need to use either the PIC32 MZ EF Curiosity 2.0 or E70 Xplained Ultra version of the BM64_bootloader since there isn't one for the BTADK.)
2. Connect a pair of headphones to the headphone out connector on the AK4954 Codec Daughter Board.
3. Compile the application, program the target device, and run it. While compiling, select the appropriate MPLAB X IDE project configuration. Refer to Building the Application for details.
4. Press and hold the Pair Button on the development board (see Table 1) to put the BM64 Module into pairing mode, indicated by the two LEDs on the BM64 Module flashing alternately.
5. In the Bluetooth Settings of your smartphone, find the name of the BM64 which you set up in Step 1, then select and pair with it. The two LEDs on the BM64 Module should stop flashing, and instead just one should flash twice every few seconds. Meanwhile the Connection LED should be lit (see Table 2).
6. Go into an application on the smartphone that outputs audio, such as Music. Select a song and press play. The Play LED should now be lit and you should hear audio from the headphones.
7. Use the Volume Button to increase the volume, the Play/Pause Button to alternately pause and resume the playback, the Next and Previous Buttons to go to the next or previous song (or use a long press of Next/Previous for fast forward or rewind). Set Table 1 below. The LEDs should change state as shown in Table 2.
8. Use a long press of the Next Button to disconnect from the smartphone, and a another long press of Next Button to reconnect. Use a long press of Volume Button and Play/Pause Button together to forget all previous pairings.
9. Call the smartphone from another phone such as a wired desk phone. When the smartphone is answered, either automatically or manually, the audio should switch over to the BM64. Talking into the handset of the desk phone should come out of the headphones, and talking into a microphone connected to the BM64 Module should come out of the desk phone handset. During the call, the LEDs should change state as shown in Table 2. When the call is terminated, any A2DP streaming that was in progress should resume.

Table 1 -- Button Assignments

Table 2 -- LED States