Hardware requirements
Mini/micro USB cable
EVK-MIMXRT1020 board
Headphone
Personal Computer
Board settings
J11, headphone connected
remove R85,R87,R88,R89 and connect FLEXIO pins to the pad close to U10 as follows:
Pin Name Board Location Pin Name Board Location
RX_DATA J18-4 RX_DATA U10-16
TX_DATA J18-3 TX_DATA U10-14
SYNC J18-2 SYNC U10-13
BCLK J18-1 BCLK U10-12
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
Note: This demo uses both headphone mic and board main mic(P1) as input source. The headphone mic provides left channel data, and main mic (P1) provides right channel data. If users found there is noise while do record operation, most probably it is the headphone standard issue (OMTP and CTIA standard difference). You should use the OMTP standard headphone. You can disable the left channel by using an headphone without microphone feature.
When the demo runs successfully, the log would be seen on the OpenSDA terminal like as below.
~~~~~~~~~~~~~~~~~~~~~
FLEXIO I2S EDMA example started!
FLEXIO I2S EDMA example finished!
~~~~~~~~~~~~~~~~~~~~~
Note:
To debug in qspiflash, following steps are needed:
1. Select the flash target and compile.
2. Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.
3. Start debugging in IDE.
- Keil: Click "Download (F8)" to program the image to qspiflash first then clicking "Start/Stop Debug Session (Ctrl+F5)" to start debugging.