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 SAM L10 Xplained Ultra Evaluation Kit.
In the MPLAB® Harmony Configurator (MHC), select the Pin Settings tab and then scroll down to 25 in the Pin Number column and configure the PORT pin PA27 as an external interrupt pin for switch functionality as shown below. 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 Available Components tab, expand 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 switch pin.
Configure LED Pin
In this step, the user LED will be configured as per below USER_LED design schematic on SAM L10 Xplained Ultra Evaluation Kit.
Select the MHC 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 as shown below.
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 MHC.
