1.33 TrustZone EIC Pin Toggle
This example application demonstrates handling of external pin interrupt in secure and non-secure project.
Description
This demonstrates TrustZone feature and uses two projects viz., Secure and Non-Secure Project that work together on the same
MCU and offering security isolation between the Trusted and the Non-trusted resources in the device.
- Secure project uses an EIC pin to generate interrupt on rising edge and toggles LED0
- Non-secure project uses an EIC pin to generate interrupt on rising edge and toggles LED1
Components Used
- EIC - Configured as Mix-Secure Peripheral for Secure EIC and Non-secure EIC interrupts
- LED0 - Configured as secure mode
- LED1 - Configured as non-secure mode
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 as shown below:
| Type | Path |
|---|---|
| Project group | apps/trustZone/eic/eic/pic32cm_sg_curiosity_progroup |
| Secure Project | apps/trustZone/eic/eic_secure |
| Non-Secure Project | apps/trustZone/eic/ |
To build the application, refer to the following table and open the project using its IDE.
| Project Name | Description |
|---|---|
|
pic32cm_sg_curiosity_pro_Secure.X pic32cm_sg_curiosity_pro.X | Secure and Non-secure MPLABX project for PIC32CM SG00 Curiosity Pro Board |
Setting Up the Hardware
The following table shows the target hardware for the application projects.
| Project Name | Board |
|---|---|
|
pic32cm_sg_curiosity_pro_Secure.X pic32cm_sg_curiosity_pro.X | PIC32CM SG00 Curiosity Pro Board |
Setting Up PIC32CM SG00 Curiosity PRO board
- Connect the Debug USB port on the board to the computer using a micro USB cable
Running the Application
- Open the project group in the MPLAB X IDE and set the non-secure project as main project
- Build and program the application
- Observe the output for PIC32CM SG00 Curiosity Pro Board as
follows:
- LED0(Green) is toggled on Switch (SW0) press using EIC interrupt in secure project
- LED1(Red) is toggled on Switch (SW1) press using EIC interrupt in non-secure project