ADC interrupt

This example demonstrates how to sample an analog input in interrupt mode and send the converted data to console.

Description

In this example, Analog input voltage in the range of 0 V to 3.3 V is fed to the ADC and converted value is displayed on the console. The ADC conversion is triggered by software and result is read in the conversion complete interrupt handler.

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_interrupt_mode/firmware .

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

Setting up the hardware

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

Setting up PIC32MM USB Curiosity board

• Connect micro USB cable to the USB1 connector on the board to the computer
• Install an USB UART click board on to the mikroBUS socket J4
• Connect mini USB cable to the USB UART click board. This will enumerate the USB to UART port
• AN14 pin is used for analog input, which is connected to onboard potentiometer

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. Console displays the ADC count and the ADC input voltage

   

5. Onboard Potentiometer can be tuned to get different output

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