MPLAB® Harmony v3 Peripheral Libraries on SAM L10: Step 3
Configure Switch Button Pin With the External Interrupt Controller (EIC) to Generate an Interrupt
In this step, the switch button will be configured as per the below USER_BUTTON design schematic on the SAM L10 Xplained Ultra Evaluation Kit.
In the MPLAB® Code Configurator (MCC), select the Pin Settings tab and then scroll down to 25 in the Pin Number column. Configure the PORT pin PA27 as an external interrupt pin for switch functionality. Internal pull-up is enabled to avoid false edge detection as there is no external pull-up on the SAM L10 Xplained Pro Evaluation Kit.
Under the Device Resources tab, expand Harmony > Peripheral > EIC.
Select and double click on EIC to add the EIC module to the project.
Configure the EIC block to generate an interrupt every time the user presses the switch SW0 as shown below, and enable filter functionality to avoid electrical noise on the switch pin.
Configure LED Pin
In this step, the user LED will be configured as per the below USER_LED design schematic on the SAM L10 Xplained Ultra Evaluation Kit.
Select the Pin Settings tab and then scroll down to 8 in the Pin Number column and configure the PORT pin PA07 as an output pin for LED functionality.
Rename the Default Main File
Under the Project Graph tab, click on System, and configure as below to give a name of your liking to the default template main file generated by the MCC.
