3.5.1 TrustZone Getting Started on PIC32CM LS60 Curiosity Pro Evaluation Kit

The application includes Basic and Extended functionalites.

• The Secure mode application toggles an LED (LED0 toggles when the switch SW0 is pressed) on a timeout basis and the periodicity of the timeout will change from 500 milliseconds to one second, two seconds, four seconds, and back to 500 milliseconds every time the user presses the switch SW0 on the PIC32CM LS60 Curiosity Pro Evaluation Kit.
• The Non-secure application requests the Secure mode application, reads the LED toggling rate and prints on the serial terminal. The LED toggling rate data is transferred to the Non-secure mode application when it requests to Secure application through Non-Secure Callables (NSC).

• The Secure mode application reads the current room temperature from the temperature sensor on the I/O1 Xplained Pro Extension Kit every 500 milliseconds. Further, the application writes the temperature readings to EEPROM and reads when a request is received from the Non-secure mode application. Also, a green LED (LED0) is toggled every time the temperature display request is received from the Non-secure mode application. The periodicity of the temperature values reading can be changed to 1 second, 2 seconds, 4 seconds, and back to 500 milliseconds whenever the user presses the switch SW0 on the PIC32CM LS60 Curiosity Pro Evaluation Kit. The temperature readings are transferred to the Non-secure mode application when it requests to Secure application through Non-Secure Callables (NSC).
• The Non-secure mode application requests the Secure mode application the temperature values and prints them on a serial console once it receives from the Secure mode application. Further, when it gets a request from the user (in the form of a key press on the serial console), it will request the Secure mode application to retrieve the last five stored temperature values in the EEPROM. The Non-secure application prints the last five stored temperature values on the console. Also, a red LED (LED1) is toggled every time the temperature values are read from EEPROM.

• Secure PORT Pins (All pins by default are secure)
• Secure I2C
• Secure RTC
• Secure EIC
• Non-secure USART
• Non-secure DMAC
• Non-secure PORT Pins (USART Pins only)

• Refer Method 1: Programming using the prebuilt hex file.
• Refer Method 2: Programming by opening and building the application project.

1. Create Prebuilt Project,
   • Click the Browse button to select the prebuilt tz_pic32cm_ls60_cpro_secure.X.production.hex file from project path pic32cm_ls60_cpro_tz_getting_started/hex.
   • Select Device as PIC32CM5164LS60100.
   • Ensure the proper tool is selected under Hardware Tool and click on Next button.
2. Select Project Name and Folder,
   • Select appropriate project name and folder and click on Finish button

1. Create Prebuilt Project,
   • Click the Browse button to select the prebuilt tz_pic32cm_ls60_cpro.X.production.hex file from project path pic32cm_ls60_cpro_tz_getting_started/hex.
   • Select Device as PIC32CM5164LS60100.
   • Ensure the proper tool is selected under Hardware Tool and click on Next button.
2. Select Project Name and Folder,
   • Select appropriate project name and folder and click on Finish button

• Perform Hardware Setup 1 steps mentioned above, if not done already.
• Open the Tera Term terminal application on the PC (from the Windows® Start menu by pressing the Start button).
• Set the baud rate to 115200.
• Reset or power cycle the device. LED0 toggles for every 500 milliseconds during power cycle.
• An LED (LED0) on the PIC32CM LS60 Curiosity Pro Evaluation Kit toggles on every timeout basis and the default periodicity of the timeout is 500 milliseconds.
• And also, the LED toggling rate is displayed on the serial terminal.
• Press the switch SW0 on the PIC32CM LS60 Curiosity Pro Evaluation Kit to change the periodicity of the timeout to one second.
• Every subsequent pressing of the switch SW0 on the PIC32CM LS60 Curiosity Pro Evaluation Kit changes the periodicity of the timeout to 2 seconds, 4 seconds, 500 milliseconds, and back to 1 second in cyclic order.
• See the following figure for the output.
  

Extended functionality using I/O1 Xplained Pro Extension Kit

• Perform Hardware Setup 2 steps mentioned above, if not done already.
• Open the Tera Term terminal application on the PC (from the Windows® Start menu by pressing the Start button).
• Change the baud rate to 115200.
• Press SW1 to start the running the extended functionality.
• The temperature values (in °F) are displayed on the terminal every 500 milliseconds, as shown below:
  
• Also, notice the LED0 blinking at 500 millisecond rate
• The temperature may be varied by placing the finger on the temperature sensor (for a few seconds).
  
• Press the switch SW0 on PIC32CM LS60 Curiosity Pro Evaluation Kit to change the default sampling rate to 1 second.
  
  
• Every subsequent pressing of switch SW0 on PIC32CM LS60 Curiosity Pro Evaluation Kit changes the default sampling rate to 2 seconds, 4 seconds, and 500 ms and back to 1 second in cyclic order as shown below.
  
• While the temperature sampling rate changes on every switch SW0 press, notice the LED0 toggling at the same sampling rate.
• Press any character on the terminal to display the last five values written to the EEPROM. Notice that a red LED (LED1) will be toggled when a key is pressed in the serial console to read the temperature values from the secure EEPROM.
  
• Anytime press SW1 to start running basic functionality shown in Basic Functionality.

• How to Setup MPLAB Harmony v3 Software Development Framework (DS90003232).
• How to Build an Application by Adding a New PLIB, Driver, or Middleware to an Existing MPLAB Harmony v3 Project (DS90003253).
• Video - How to Set up the Tools Required to Get Started with MPLAB® Harmony v3 and MCC
• Create a new MPLAB Harmony v3 project using MCC
• Update and Configure an Existing MHC-based MPLAB Harmony v3 Project to MCC-based Project