1.2 ADC Polling

This example application shows how to sample an analog input in polled mode and send the converted data to console.

Description

In this example, Analog input voltage in the range of 0V to 3.3V (from potentiometer) is fed to the ADC and converted value is displayed on the console. The ADC conversion is triggered by software and result is polled using status API.

Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/adc/adc_polled_mode/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project NameDescription
sam_rh707_ek.XMPLABX project for SAM RH707F18 Evaluation Kit

Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project NameDescription
sam_rh707_ek.XSAM RH707F18 Evaluation Kit

Setting Up SAM RH707F18 Evaluation Kit

  • Connect the Debug USB port on the board to the computer using a micro USB cable
  • Connect the debugger probe to J5 connector
  • Connect the J1 (USB-C) port on the board to the computer using a USB-C cable

Running the Application

  1. Open the Terminal application (Ex.:Tera term) on the computer
  2. Connect to the USB to UART COM port and configure the serial settings as follows:
    • Baud : 115200
    • Data : 8 Bits
    • Parity : None
    • Stop : 1 Bit
    • Flow Control : None
  3. Build and Program the application project using its IDE
  4. Reset the board to run the application
  5. Vary ADC input voltage from potentiometer (R109 - POT) and observe ADC count on console