Jump to main content

##

# 1.34 TRNG Random Number

This example application shows how to use the TRNG Peripheral library to generate and read a random number.

## Description

This example application shows how to use the TRNG peripheral library to produce a 32-bit true random number. Generated random number can be used as an entropy source for seeding a Deterministic Random Number Generator (DRNG), creating cryptographic keys for ciphers, etc.

## 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 be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/trng/random_number/firmware.

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

Project Name | Description
--- | ---
sam_9x75_curiosity.X | MPLABX project for SAM9X75 Curiosity Development Board

## Setting Up AT91Bootstrap Loader

To load the application binary onto the target device, the user needs to use at91bootstrap loader. Refer to the at91bootstrap loader documentation for details on how to configure, build and run bootstrap loader project and use it to bootstrap the application binaries.

## Setting Up the Hardware

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

Project Name | Description
--- | ---
sam_9x75_curiosity.X | SAM9X75 Curiosity Development Board

### Setting Up SAM9X75 Curiosity Development Board

- Connect the UART DEBUG J35 on board to the computer using a UART-FTDI cable (to enable debug com port)
- Connect the USB port J2 on board to the computer using a micro USB cable (to power the board)

## Running the Application

1. Build the application using its IDE
2. Open the Terminal application (Ex.:Tera term) on the computer
3. Connect to the (USB to Serial) COM port and configure the serial settings as follows:
   - Baud : 115200
   - Data : 8 Bits
   - Parity : None
   - Stop : 1 Bit
   - Flow Control : None
4. The console displays the following message
5. Every time the switch is pressed, a new 32 bit random number is generated and displayed on the console

Following table provides the Switch name:

Board | Switch Name
--- | ---
SAM9X75 Curiosity Development Board | USER