1.2 ADC User Sequence
This example demonstrates how to sample three analog inputs using the user sequencer in software trigger mode and send the converted data to the console.
Description
| Board | Sequence of Conversion |
|---|---|
| SAM G55 Xplained Pro Evaluation Kit | AD2 –> AD0 –> AD1 |
Analog input voltage in the range of 0V to 3.3V is fed to the ADC input channel AD2, AD0 and AD1. ADC conversion result is displayed on the console.
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_user_sequence/firmware.
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
| sam_g55_xpro.X | MPLABX project for SAM G55 Xplained Pro Evaluation Kit |
Setting Up the Hardware
The following table shows the target hardware for the application projects.
| Project Name | Description |
|---|---|
| sam_g55_xpro.X | SAM G55 Xplained Pro Evaluation Kit |
Setting Up SAM G55 Xplained Pro Evaluation Kit
- Use a jumper wire to connect Pin 3 of EXT1 (AD0 is mapped to Port Pin PA17) to 3.3V or GND
- Use a jumper wire to connect Pin 4 of EXT1 (AD1 is mapped to Port Pin PA18) to 3.3V or GND
- Use a jumper wire to connect Pin 3 of EXT3 (AD2 is mapped to Port Pin PA19) to 3.3V or GND
- Connect the Debug USB port on the board to the computer using a micro USB cable
Running the Application
- Open the Terminal application (Ex.:Tera term) on the computer
- Connect to the EDBG Virtual COM port and configure the serial settings as
follows:
- Baud : 115200
- Data : 8 Bits
- Parity : None
- Stop : 1 Bit
- Flow Control : None
- Build and Program the application project using its IDE
- Console displays the ADC Count and the ADC Input Voltage
