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dsc_adc16_polling

dsc_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#

TWR-MC56F8400
Hardware requirements

  • Mini USB cable

  • TWR-MC56F8400 board

  • Personal Computer

Board hardware common setting

  1. Power setting:

    Connect J11 pin1 and pin2 Connect J6 pin1 and J7 pin2

  2. UART setting:

    Connect J8 pin3 and pin4 Connect J9 pin3 and pin4

  3. Onboard OSJTAG debugger setting:

    Connect J20 pin1 and pin2. Leave J17 open. Note: J17 is only used(connected) when firmware update for onboard debugger OSJTAG. Connect J21 pin 1-2, 3-4, 5-6, 7-8, to setup onboard debugger OSJTAG. Note: when use external debugger(connected to J14), leave all J21 pins open

Board settings

  • Supply external voltage(0~3.3V) to J503-3.

Prepare the Demo

  1. Connect USB cable between the host PC and the JM60 USB(J18) port on the target board. It setups OSJTAG and COM port in PC device manager.

  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 with OSJTAG debug configuration.

  4. 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.
ADC Full Range: 4096
Press any key to get user channel's ADC value ...
ADC Value: 1243
ADC Value: 1219
ADC Value: 1212
ADC Value: 1232
ADC Value: 1225
ADC Value: 1190
...
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