Hardware requirements

  • Mini/Micro USB cable

  • FRDM-K32L2A4S board

  • Personal Computer

Board settings

Input analog signal to J4-11

Prepare the Demo

  1. Connect a USB cable between the PC host and the OpenSDA USB port on the board.

  2. Open a serial terminal on PC for OpenSDA serial device with these settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Connect external signal source to user-defined channel, defined by “DEMO_ADC16_USER_CHANNEL” in source code.

  4. Download the program to the target board.

  5. Either press the reset button on your board or 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 OpenSDA terminal like:

ADC16 interrupt Example.
ADC16_DoAutoCalibration() Done.
ADC Full Range: XXXX
Press any key to get user channel's ADC value ...
ADC Value: 1918
ADC Interrupt Count: 1
ADC Value: 1635
ADC Interrupt Count: 2
ADC Value: 1412
ADC Interrupt Count: 3
ADC Value: 1332
ADC Interrupt Count: 4
ADC Value: 1543
ADC Interrupt Count: 5
ADC Value: 1579
ADC Interrupt Count: 6