1.40 TRAM Erase on Tamper Detect

This example application shows how to setup and configure tamper detection using the RTC Peripheral Library. The application populates TrustRam with random data and then waits for tamper detection to happen. On Tamper detection, application displays the tamper detected and read the content of the TrustRam. The example demonstrates auto erase feature of the TrustRam when tamper is detected.

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/tram/tram_tamper_erase/firmware.

To build the application, refer to the following table and open the project using its IDE.

The following table shows the target hardware for the application projects.

1. Open the Terminal application (Ex.: Tera term) on the computer
2. 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
3. Build and Program the application using its IDE
4. Console will print the value contained in the TRAM (Observe that the TRAM contains non zero values)

   

5. To emulate tampering, create a falling edge on the RTC input pin
   • Short RTC Input pin to VCC and then remove the short, and connect RTC Input pin to GND to create a falling edge

     Board	RTC Input	VCC
     PIC32CM LE00 Curiosity Pro Evaluation Kit	RTC Input 0 (EXT3, PIN 3)	EXT3, pin 20

6. Console will output the current value of TRAM (Observe that the TRAM values now read zero indicating a erasure of the TRAM content)