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Blinky example

Introduction

This blinky example demonstrates the integration of FreeRTOS kernel and TrustedFirmware-M. The FreeRTOS application running on non-secure side uses PSA APIs to fetch the firmware framework version of TrustedFirmware-M running on the secure-side and prints it on the console. In addition, to simulate LED blinking, LED On and LED off are printed onto the console at regular intervals.

Setting up Arm Virtual Hardware using Amazon Machine Images

Follow the instructions described in Launch Arm Virtual Hardware Instance to setup your development environment.

If you have successfully followed the instructions, then you should have a console (either AWS-Web-Console or Local-Console) to Arm Virtual Hardware Instance. From now on, any command-line commands described in this document must be run on the console connected to Arm Virtual Hardware Instance.

Setting up development environment

Follow the instructions described in Setting Up your Development Environment to setup your development environment.

Building the application

To build the blinky example, run the following command:

./Tools/scripts/build.sh blinky

Run the command below to perform a clean build:

./Tools/scripts/build.sh blinky -c

This will build the example with the Arm Compiler (armclang) by default, which is included in the Arm Virtual Hardware instance on AWS. If you would like to build it with the Arm GNU Toolchain (arm-none-eabi-gcc) installed by yourself, append the extra option --toolchain GNU to the build command above.

Running the application

To run the blinky example, run the following command:

./Tools/scripts/run.sh blinky

Expected output

[INF] Starting bootloader
[INF] Beginning BL2 provisioning
[WRN] TFM_DUMMY_PROVISIONING is not suitable for production! This device is NOT SECURE
[INF] Primary image: magic=good, swap_type=0x1, copy_done=0x3, image_ok=0x3
[INF] Scratch: magic=bad, swap_type=0x1, copy_done=0x2, image_ok=0x2
[INF] Boot source: primary slot
[INF] Swap type: none
[INF] Primary image: magic=good, swap_type=0x1, copy_done=0x3, image_ok=0x1
[INF] Scratch: magic=bad, swap_type=0x1, copy_done=0x2, image_ok=0x2
[INF] Boot source: primary slot
[INF] Swap type: none
[INF] Bootloader chainload address offset: 0x0
[INF] Jumping to the first image slot
[INF] Beginning TF-M provisioning
<NUL>[WRN] <NUL>TFM_DUMMY_PROVISIONING is not suitable for production! <NUL>This device is NOT SECURE<NUL>
<NUL>[Sec Thread] Secure image initializing!
<NUL>Booting TF-M v1.8.0
<NUL>Creating an empty ITS flash layout.
Creating an empty PS flash layout.
[INF][Crypto] Provisioning entropy seed... complete.
[DBG][Crypto] Initialising mbed TLS 3.4.0 as PSA Crypto backend library... complete.
psa_framework_version is: 257
LED on
LED off
LED on
LED off
LED on
LED off