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adc16_polling

adc16_polling#

Overview#

The adc16_polling example shows the simplest way to use ADC16 driver.

In this example, user should indicate a channel to provide a voltage signal (can be controlled by user) as the ADC16’s sample input. When running the project, typing any key into debug console would trigger the conversion. The execution would check the conversion completed flag in loop until the flag is asserted, which means the conversion is completed. Then read the conversion result value and print it to debug console.

Note, the default setting of initialization for the ADC converter is just an available configuration. User can change the configuration structure’s setting in application to fit the special requirement.

The auto-calibration is not essential but strongly recommended. It can help to adjust the converter itself and improve the ADC16’s performance.

Supported Boards#

FRDM-K22F
Hardware requirements

  • Mini/Micro USB cable

  • FRDM-K22F board

  • Personal Computer

Board settings

No special is needed.

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 polling Example. ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC Value: 1985 ADC Value: 1689 ADC Value: 1355 ADC Value: 1625 ADC Value: 1575 ADC Value: 1471

FRDM-K32L2A4S
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 polling Example.
ADC16_DoAutoCalibration() Done.
ADC Full Range: XXXX
Press any key to get user channel's ADC value ...
ADC Value: 1985
ADC Value: 1689
ADC Value: 1355
ADC Value: 1625
ADC Value: 1575
ADC Value: 1471
FRDM-K32L2B
Hardware requirements

  • Mini/Micro USB cable

  • FRDM-K32L2B board

  • Personal Computer

Board settings

No special is needed.

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. Shorten jumper J19 to use external reference voltage pair pins.

  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 polling Example. ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC Value: 1985 ADC Value: 1689 ADC Value: 1355 ADC Value: 1625 ADC Value: 1575 ADC Value: 1471

FRDM-MCXC041
Hardware requirements

  • Type-C USB cable

  • FRDM-MCXC041 board

  • Personal Computer

Board settings

No special settings are required.

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:

    • 9600 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Connect external signal in J4-2

  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 example runs successfully, the following message is displayed in the terminal:

ADC16 polling Example.
ADC16_DoAutoCalibration() Done.
Press any key to get user channel's ADC value ...
ADC Value: 1985
ADC Value: 1689
ADC Value: 1355
ADC Value: 1625
ADC Value: 1575
ADC Value: 1471
FRDM-MCXC242
Hardware requirements

  • USB-C cable

  • FRDM-MCXC242 board

  • Personal Computer

Board settings

No special is needed.

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 polling Example. ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC Value: 1985 ADC Value: 1689 ADC Value: 1355 ADC Value: 1625 ADC Value: 1575 ADC Value: 1471

FRDM-MCXC444
Hardware requirements

  • Type-C USB cable

  • FRDM-MCXC444 board

  • Personal Computer

Board settings

No special is needed.

Prepare the Demo

  1. Connect a type-c USB cable between the host PC and the MCU-Link USB port (J13) on the target 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. Connect external signal source J6-2 to user-defined channel, defined by “DEMO_ADC16_USER_CHANNEL” in source code. Shorten jumper JP6 to use external reference voltage pair pins.

  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 terminal like:

ADC16 polling Example. ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC Value: 1985 ADC Value: 1689 ADC Value: 1355 ADC Value: 1625 ADC Value: 1575 ADC Value: 1471

TWR-KM34Z50MV3
Hardware requirements

  • Mini USB cable

  • TWR-KM34Z50MV3 board

  • Personal Computer

Board settings

Connect J8 1-2 to use potentiometer

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target 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. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

Roll the potentiometer(R20) to change the ADC value. When the demo runs successfully, the following message is displayed in the terminal:

ADC16 polling Example.
ADC16_DoAutoCalibration() Done.
Press any key to get user channel's ADC value ...
ADC Value: 1985
ADC Value: 1689
ADC Value: 1355
ADC Value: 1625
ADC Value: 1575
ADC Value: 1471
TWR-KM34Z75M
Hardware requirements

  • Mini USB cable

  • TWR-KM34Z75M board

  • Personal Computer

Board settings

Connect J21 1-2 to use potentiometer

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target 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. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

Roll the potentiometer(R21) to change the ADC value. When the demo runs successfully, the following message is displayed in the terminal:

ADC16 polling Example.
ADC16_DoAutoCalibration() Done.
Press any key to get user channel's ADC value ...
ADC Value: 1985
ADC Value: 1689
ADC Value: 1355
ADC Value: 1625
ADC Value: 1575
ADC Value: 1471
TWR-KM35Z75M
Hardware requirements

  • Micro USB cable

  • TWR-KM35Z75M board

  • Personal Computer

Board settings

Connect J21 1-2 to use potentiometer

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target 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. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

Roll the potentiometer(R21) to change the ADC value. When the demo runs successfully, the following message is displayed in the terminal:

ADC16 polling Example.
ADC16_DoAutoCalibration() Done.
Press any key to get user channel's ADC value ...
ADC Value: 1985
ADC Value: 1689
ADC Value: 1355
ADC Value: 1625
ADC Value: 1575
ADC Value: 1471
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