Hardware requirements

• Micro USB cable

• MIMXRT685-AUD-EVK board

• Personal Computer

Board settings

Connect JP44 1-2,JP45 1-2

Prepare the Demo

1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the board

2. Open a serial terminal with the following settings:

   • 115200 baud rate

   • 8 data bits

   • No parity

   • One stop bit

   • No flow control

3. Download the program to the target board.

4. Launch the debugger in your IDE to begin running the demo.

Running the demo

When the demo runs successfully, the log would be seen on the terminal like:

Configure DMA
Buffer Data before transfer
 <data>
Transfer completed
Buffer Data after transfer
 <data>

This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.