Add OTA support and improve pipeline test.

- Improve README
- Add OTA support into ML application
- Improve build script
- Fix issues with Blinky
- Ensure tests can be run on all environment

Signed-off-by: Vincent Coubard <vincent.coubard@arm.com>

.github/workflows/avh.yml

+# This is a basic workflow to help you get started with Actions on CMSIS projects
+
+name: ATS keyword workflow
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches: [ main, test-actions ]
+  pull_request:
+    branches: [ main, test-actions ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "ci_build_and_test_ats_keyword"
+  ci_build_and_test_ats_keyword:
+    # The type of runner that the job will run on
+    #runs-on: ubuntu-latest
+    runs-on: self-hosted
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      - uses: actions/checkout@v2
+
+      # Cleanup of previous environment 
+      - name: Cleanup of self hosted runner environment 
+        run : |
+          rm -rf build
+          rm -rf venv
+          rm -rf lib/*
+          git clean -xfd
+          git reset --hard
+
+      # Boostrap the environment 
+      - name: Bootstrap environment
+        run : |
+          ./bootstrap.sh
+
+      # Setup python environment
+      - name: Setup Python environment 
+        run: |
+          python3 -m venv venv 
+          source venv/bin/activate
+          pip3 install click imgtool pytest
+
+      # Execute CMSIS Build command to build the executable for a Cortex-M55 using Arm Compiler
+      - name: Build kws application
+        run : |
+          source venv/bin/activate        
+          ./build.sh kws
+          
+      # Execute CMSIS Build command to build the executable for a Cortex-M55 using Arm Compiler
+      - name: Build blinky application
+        run : |
+          source venv/bin/activate        
+          ./build.sh blinky
+
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: binaries
+          path: |
+            ${{ github.workspace }}/build/bootloader/bl2.axf
+            ${{ github.workspace }}/build/secure_partition/tfm_s.axf
+            ${{ github.workspace }}/build/blinky/tfm_ns.axf
+            ${{ github.workspace }}/build/kws/tfm_ns.axf
+
+      - name: Run blinky integration test
+        run : |
+          source venv/bin/activate        
+          pytest -s blinky/tests
+
+      - name: Run kws integration test
+        run : |
+          source venv/bin/activate        
+          pytest -s kws/tests    
+
+          
\ No newline at end of file

.gitmodules

-[submodule "source/lib/amazon_freertos"]
+[submodule "lib/amazon_freertos"]
 	path = lib/amazon_freertos
 	url = https://github.com/aws/amazon-freertos.git
-[submodule "source/lib/mbedcrypto"]
+[submodule "lib/mbedcrypto"]
 	path = lib/mbedcrypto
 	url = https://github.com/ARMmbed/mbedtls.git
-[submodule "source/lib/mcuboot"]
+[submodule "lib/mcuboot"]
 	path = lib/mcuboot
 	url = https://github.com/mcu-tools/mcuboot.git
-[submodule "source/lib/tf-m"]
+[submodule "lib/tf-m"]
 	path = lib/tf-m
 	url = https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git
-[submodule "source/lib/tfm_test"]
+	branch = master
+[submodule "lib/tfm_test"]
 	path = lib/tfm_test
 	url = https://git.trustedfirmware.org/TF-M/tf-m-tests.git
-[submodule "source/lib/VHT"]
+[submodule "lib/VHT"]
 	path = lib/VHT
 	url = https://github.com/ARM-software/VHT
-[submodule "source/lib/ml-embedded-evaluation-kit"]
+[submodule "lib/ml-embedded-evaluation-kit"]
 	path = lib/ml-embedded-evaluation-kit
 	url = https://review.mlplatform.org/ml/ethos-u/ml-embedded-evaluation-kit

README.md

@@ -34,7 +34,19 @@ Follow these simple steps to use this code example's default configuration #3 ke
 2. Launch Arm Virtual Hardware Instance
 
 ```sh
-# TBD
+# Ensure aws cli is installed and set up: https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html
+# The script requires a key pair to be set in AWS to identify instances and start new ones.
+# Provisioning of keys is detailed here: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html
+# Note: The key parameter required by the script is the name of the key pair in AWS. 
+
+# Start a new instance.
+./scripts/avh_start -k <key pair> start
+
+# Get instances status.
+./scripts/avh_start -k <key pair> status
+
+# Terminate an instance. If multiple instance are running, you must provide the instance ID.
+./scripts/avh_start -k <key pair> status
 ```
 
 3. Launch GitHub Self-Hosted Runner
@@ -48,9 +60,9 @@ Follow these simple steps to use this code example's default configuration #3 ke
  
 # Install runner software
 > mkdir actions-runner && cd actions-runner
-> curl -o actions-runner-osx-x64-2.283.2.tar.gz -L https://github.com/actions/runner/releases/download/v2.283.2/actions-runner-osx-x64-2.283.2.tar.gz
-> echo "d7d026b9bf1cb3f133cf53e79c71c0458a82b3f2bdb0a8859cd386ae18ee7c4a  actions-runner-osx-x64-2.283.2.tar.gz" | shasum -a 256 -c
-> tar xzf ./actions-runner-osx-x64-2.283.2.tar.gz
+> curl -o <actions-runner.tar.gz -L https://github.com/actions/runner/releases/download/<version>/<action-runner>.tar.gz
+> echo "<sha>  <action-runner>.tar.gz" | shasum -a 256 -c
+> tar xzf ./<action-runner>.tar.gz
  
 # Create, configure and run the runner
 > ./config.sh --url https://github.com/exampleuser/my-ats-keyword --token <token>
@@ -60,7 +72,8 @@ Follow these simple steps to use this code example's default configuration #3 ke
 > exit
 ```
 
-4. make a trivial (whitespace) code change and watch the code example compile and run test cases on Arm Virtual Hardware on your ec2 instance
+4. make a trivial (whitespace) code change and watch the code example compile and run test cases on Arm Virtual Hardware on your ec2 instance. 
+   Please refer to Github actions [documentation](https://docs.github.com/en/actions) to make additional change to the workflow
 
 ```sh
 # add whitespace to this file
@@ -72,14 +85,121 @@ Follow these simple steps to use this code example's default configuration #3 ke
 > git push origin master
 ```
 
+5. To update the application, a set of scripts is included to setup the environment, build applications, run them and test them. These scripts must be executed in the AVH AMI. 
+
+```sh
+# Synchronize git submodules, setup ML and apply required patches
+./script/bootstrap.sh
+
+# The python environment requires extra packages to sign the binaries
+pip3 install click imgtool pytest
+
+# Build the blinky or kws application
+./script/build.sh <blinky|kws>
+
+# Run the blinky or kws application
+./script/build.sh <blinky|kws>
+
+# Launch integration tests
+pytest -s <blinky|kws>/tests
+```
+
+Alternatively, the projects can be build using [Keil MDK](https://www.arm.com/products/development-tools/embedded-and-software/keil-mdk).
+`blinky.uvmpw` and `kws.uvmpw` contains respectively the `blinky` and `kws` project.  
+
+# Setting up AWS connectivity
+
+The KWS Demo will attempt to connect to AWS IOT and report ML inference results through an MQTT connection. For this to work you will need a [AWS Account](https://aws.amazon.com/) and setup an IoT thing and set credentials in the application.
+
+## AWS account IoT setup
+
+### Create an IoT thing for your device
+
+1. Login to your account and browse to the [AWS IoT console](https://console.aws.amazon.com/iotv2/).
+2. In the left navigation pane, choose **Manage**, and then choose **Things**.
+3. If you do not have any IoT things registered in your account, the **You don’t have any things yet** page is displayed. If you see this page, choose **Register** a thing.
+4. On the **Creating AWS IoT things** page, choose **Create a single thing**.
+5. On the **Add your device to the thing registry** page, type a name for your thing (for example `MyThing`), and then choose **Next**. You will need to add the name later to your C code.
+6. On the **Add a certificate for your thing** page, under **One-click certificate creation**, choose **Create certificate**.
+7. Download your private key and certificate by choosing the **Download** links for each. Make note of the certificate ID. You need it later to attach a policy to your certificate.
+8. Choose **Activate** to activate your certificate. Certificates must be activated prior to use.
+
+### Create a policy and attach it to your thing
+
+1. In the navigation pane of the AWS IoT console, choose **Secure**, and then choose **Policies**.
+2. On the **Policies** page, choose **Create** (top right corner).
+3. On the **Create a policy** page, enter a name for the policy. In the **Action** box, enter **iot:Connect**, **iot:Publish**, **iot:Subscribe**, **iot:Receive**. The **Resource ARN** box will be auto-filled with your credentials. Replace the part after the last semicolon (`:`) with `*`. Under **Effect**, check the **Allow** box. Click on **Create**.
+4. In the left navigation pane of the AWS IoT console, choose **Secure**, and then choose **Certificates**. You should see the certificate that you have created earlier.
+5. Click on the three dots in the upper right corner of the certificate and choose **Attach policy**.
+6. In the **Attach policies to certificate(s)** window, enable the policy that you have just created and click **Attach**.
+
+## Configure the application to connect to your AWS account
+
+Edit `bsp/aws_configs/aws_clientcredential.h` file and set values of specified user defines.
+
+`clientcredentialMQTT_BROKER_ENDPOINT`
+
+Set this to the endpoint name of your amazon account. To find this go to the navigation pane of the [AWS IoT console](https://console.aws.amazon.com/iotv2/), choose **Settings**. On the **Settings** page, and copy the name of your **Endpoint** (such as `a3xyzzyx.iot.us-east-2.amazonaws.com`).
+
+`clientcredentialIOT_THING_NAME`
+
+Set this to the name of the thing you set (e.g. MyThing).
+
+Next insert the keys that are in the certificates you have downloaded when you created the thing. Edit the file `bsp/aws_configs/aws_clientcredential_keys.h` replacing the existing keys with yours.
+
+`keyCLIENT_CERTIFICATE_PEM`
+
+Replace with contents from `<your-thing-certificate-unique-string>-certificate.pem.crt`.
+
+`keyCLIENT_PRIVATE_KEY_PEM`
+
+Replace with contents from `<your-thing-certificate-unique-string>-private.pem.key`.
+
+`keyCLIENT_PUBLIC_KEY_PEM`
+
+Replace with contents from `<your-thing-certificate-unique-string>-public.pem.key`.
+
+## Observing MQTT connectivity
+
+To see messages being sent by the application:
+1. Login to your account and browse to the [AWS IoT console](https://console.aws.amazon.com/iotv2/).
+2. In the left navigation panel, choose **Manage**, and then choose **Things**.
+3. Select the thing you created, and open the **Activity** tab. This will show the application connecting and subscribing to a topic.
+4. Click on the **MQTT test client** button. This will open a new tab.
+5. The tab **Subscribe to a topic** should be already selected. Open the **Additional configuration** rollout.
+6. In the topic filter field enter the topic name which is a concatenation of the name of your thing (set in clientcredentialIOT_THING_NAME) and `/ml/inference` (e.g. if you thing name is MyThing then it's `MyThing/ml/inference`)
+7. In the **MQTT payload display** combo box select `Display payloads as strings (more accurate)`
+8. Click the **Subscribe** button. The messages will be shown below.
+
 # Replace DS-CNN
 
+All the ML models supported by the [ML Embedded Eval Kit](All the models supported ) are available to applications. The first step to use another odule is to generate sources files from its labels and `.tflite` model.  
+
 ```sh
-# pseudo cli/commands/steps to replace the keyword model with another model
-# example can use a model from the arm model zoo
-# steps should be validated by arm prior to release
+# Enter the ml example repository
+cd lib/ml-embedded-evaluation-kit/
+
+ML_GEN_SRC="generated/<model name>/src"
+ML_GEN_INC="generated/<model name>/include"
+
+mkdir -p $ML_GEN_SRC
+mkdir -p $ML_GEN_INC
+
+./lib/ml-embedded-evaluation-kit/resources_downloaded/env/bin/python3 scripts/py/gen_labels_cpp.py \
+    --labels_file resources/<model name>/labels/<label file>.txt \
+    --source_folder_path $ML_GEN_SRC \
+    --header_folder_path $ML_GEN_INC \
+    --output_file_name <model name>_labels 
+./resources_downloaded/env/bin/python3 scripts/py/gen_model_cpp.py \
+    --tflite_path resources_downloaded/<model name>/<model>.tflite \
+    --output_dir $ML_GEN_SRC
 ```
 
+Models available are present in `./lib/ml-embedded-evaluation-kit/resources_downloaded`.
+Pre-integrated source code is available from the `ML Embedded Eval Kit` and can be browsed from `./lib/ml-embedded-evaluation-kit/source/use_case`. 
+
+Integrating a new model means integrating its source code and requires update of the build files.
+
 # ML Embedded Eval Kit
 
 Philip Lewer to replace this text with a paragraph for ml embedded eval kit
@@ -90,12 +210,17 @@ Philip Lewer to replace this text with a paragraph for ml embedded eval kit
 
 # Other Resources
 
-| Repository                                                                                                    | Description                                                                                                                                                                                                                        |   |   |   |
-|---------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|---|---|
-| [Arm AI Ecosystem Catalog](https://www.arm.com/why-arm/partner-ecosystem/ai-ecosystem-catalog)                | Connects you to the right partners, enabling you to build the next generation of AI solutions                                                                                                                                      |   |   |   |
-| [Arm ML Model Zoo](https://github.com/ARM-software/ML-zoo)                                                    | A collection of machine learning models optimized for Arm IP.                                                                                                                                                                      |   |   |   |
-| [Arm Virtual Hardware Documentation](https://mdk-packs.github.io/VHT-TFLmicrospeech/overview/html/index.html) | Documentation for [Arm Virtual Hardware](https://www.arm.com/products/development-tools/simulation/virtual-hardware)                                                                                                               |   |   |   |
-| Support                                                                                                       | A [community.arm.com](http://community.arm.com/) forum exists for users to post queries. INTERNAL NOTE →   they have – already set up on the test environment (link).  This will be moved to the live environment on 19th October. |   |   |   |
+| Repository                                                                                                    | Description                                                                                                                                                                                                                        |
+|---------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [Arm AI Ecosystem Catalog](https://www.arm.com/why-arm/partner-ecosystem/ai-ecosystem-catalog)                | Connects you to the right partners, enabling you to build the next generation of AI solutions                                                                                                                                      |
+| [Arm ML Model Zoo](https://github.com/ARM-software/ML-zoo)                                                    | A collection of machine learning models optimized for Arm IP.                                                                                                                                                                      |
+| [Arm Virtual Hardware Documentation](https://mdk-packs.github.io/VHT-TFLmicrospeech/overview/html/index.html) | Documentation for [Arm Virtual Hardware](https://www.arm.com/products/development-tools/simulation/virtual-hardware)                                                                                                               |
+| [Arm Virtual Hardware Documentation](https://mdk-packs.github.io/VHT-TFLmicrospeech/overview/html/index.html) | Documentation for [Arm Virtual Hardware](https://www.arm.com/products/development-tools/simulation/virtual-hardware)                                                                                                               |
+| [Arm CMSIS Build](https://arm-software.github.io/CMSIS_5/Build/html/index.html)                               | Documentation for the build system used by applications in this repository.                                                                                                                                                        |
+| [AWS FreeRTOS](https://docs.aws.amazon.com/freertos/)                                                         | Documentation for AWS FreeRTOS.                                                                                                                                                                                                    |
+| [AWS IoT](https://docs.aws.amazon.com/iot/latest/developerguide/what-is-aws-iot.html)                         | Documentation for AWS IoT.                                                                                                                                                                                                         |
+| [Trusted Firmware-M](https://tf-m-user-guide.trustedfirmware.org/)                                            | Documentation for Trusted Firmware-M                                                                                                                                                                                               |
+| Support                                                                                                       | A [community.arm.com](http://community.arm.com/) forum exists for users to post queries. INTERNAL NOTE →   they have – already set up on the test environment (link).  This will be moved to the live environment on 19th October. |
 
 # License and contributions
 

blinky.uvmpw

+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<ProjectWorkspace xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="project_mpw.xsd">
+
+  <SchemaVersion>1.0</SchemaVersion>
+
+  <Header>### uVision Project, (C) Keil Software</Header>
+
+  <WorkspaceName>WorkSpace</WorkspaceName>
+
+  <project>
+    <PathAndName>.\tfm.bootloader.uvprojx</PathAndName>
+  </project>
+
+  <project>
+    <PathAndName>.\tfm.secure.uvprojx</PathAndName>
+  </project>
+
+  <project>
+    <PathAndName>.\tfm.blinky_ns.uvprojx</PathAndName>
+    <NodeIsActive>1</NodeIsActive>
+  </project>
+
+</ProjectWorkspace>

blinky/blink_task.c

-/*
- * Copyright (c) 2021 Arm Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "stdio.h"
-#include "FreeRTOS.h"
-#include "semphr.h"
-#include "task.h"
-#include "queue.h"
-#include "timers.h"
-#include "tfm_ns_interface.h"
-#include "psa/protected_storage.h"
-#include "serial.h"
-#include "blink_task.h"
-#include "ml_interface.h"
-
-enum {
-    LED1    = 1 << 0,
-    LED_YES = LED1,
-    LED2    = 1 << 1,
-    LED_GO  = LED2, 
-    LED3    = 1 << 2,
-    LED_UP  = LED3,
-    LED4    = 1 << 3,
-    LED_LEFT = LED4,
-    LED5    = 1 << 4,
-    LED_ON = LED5,
-    LED6    = 1 << 5,
-    LED_ALIVE = LED6,
-    LED7    = 1 << 6,
-    LED8    = 1 << 7,
-    LED9    = 1 << 8,
-    LED10   = 1 << 9,
-    LED_ALL = 0xFF
-};
-
-static uint32_t *fpgaio_leds = (uint32_t *)0x49302000;
-
-// Events 
-typedef enum {
-    UI_EVENT_BLINK,
-    UI_EVENT_ML_STATE_CHANGE
-} ui_state_event_t;
-
-typedef struct { 
-    ui_state_event_t event;
-} ui_msg_t;
-
-static ui_msg_t blink_event = {
-    UI_EVENT_BLINK
-};
-
-static ui_msg_t ml_state_change_event = { 
-    UI_EVENT_ML_STATE_CHANGE
-};
-
-// Message queue 
-static QueueHandle_t ui_msg_queue = NULL;
-
-// Blinking timer 
-TimerHandle_t blink_timer;
-
-void led_on(uint8_t bits)
-{
-    *fpgaio_leds |= bits;
-}
-
-void led_off(uint8_t bits)
-{
-    *fpgaio_leds &= ~bits;
-}
-
-void led_toggle(uint8_t bits)
-{
-    *fpgaio_leds ^= bits;
-}
-
-static void blink_timer_cb( TimerHandle_t xTimer ) {
-    // Schedule blink of the led in the event queue 
-    xQueueSend(ui_msg_queue, (void*) &blink_event, 0);
-}
-
-/*
- * Blink task.
- *
- * Blinks LEDs.
- * 
- * LED1 on and LED2 off       => heard YES
- * LED1 off and LED2 off      => heard NO
- * LED1 off and LED2 blinking => no/unknown input
- */
-void blink_task(void *pvParameters)
-{
-    printf("Blink task started\r\n");
-
-    // Create the ui event queue 
-    ui_msg_queue = xQueueCreate(
-        10,                 // In practive at most two items (blink and ml state change) should be in the queue.  
-        sizeof(ui_msg_t)
-    );
-
-    // Configure the timer 
-    blink_timer = xTimerCreate( 
-        "Blink Timer",
-        portTICK_PERIOD_MS * 25,  // timeout
-        pdTRUE,                   // auto reload
-        ( void * ) 0,             // initial value
-        blink_timer_cb      
-    );
-
-    // Setup blinking event 
-    led_off(LED_ALL);
-
-    // start the blinking timer 
-    xTimerStart(blink_timer, portMAX_DELAY);
-
-    while (1) {
-        ui_msg_t msg; 
-        if(xQueueReceive(ui_msg_queue, &msg, portMAX_DELAY) != pdPASS ) {
-           continue; 
-        }
-
-        switch (msg.event)
-        {
-            case UI_EVENT_BLINK:
-                led_toggle(LED_ALL);
-                break;
-
-            default:
-                break;
-        }
-    }
-}

blinky/freertos_adaptation.c

@@ -71,3 +71,4 @@ void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimerTaskTCBBuffer, Stack
     configMINIMAL_STACK_SIZE is specified in words, not bytes. */
     *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
 }
+

blinky/main_ns.c

@@ -14,37 +14,12 @@
  * limitations under the License.
  */
 
-#include "stdio.h"
-#include "string.h"
-#include "cmsis.h"
-#include "serial.h"
-#include "print_log.h"
-
-#include "blink_task.h"
-#include "ml_interface.h"
-
+#include <stdio.h>
 #include "FreeRTOS.h"
 #include "task.h"
-#include "FreeRTOS_IP.h"
-
-/* includes for TFM */
 #include "tfm_ns_interface.h"
 #include "psa/protected_storage.h"
-#include "psa/crypto.h"
-
-/* includes for IoT Cloud */
-#include "iot_mqtt.h"
-#include "iot_secure_sockets.h"
-#include "iot_network_freertos.h"
-#include "iot_logging_task.h"
-#include "aws_dev_mode_key_provisioning.h"
-
-extern int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
-                                             void (*free_func)( void * ) );
-static void * prvCalloc( size_t xNmemb,
-                         size_t xSize );
-
-extern void DEMO_RUNNER_RunDemos( void );
+#include "serial.h"
 
 /*
  * Semihosting is a mechanism that enables code running on an ARM target
@@ -63,39 +38,34 @@ __asm("  .global __ARM_use_no_argv\n");
 
 extern uint32_t tfm_ns_interface_init(void);
 
-#define FREERTOS_HIGHEST_TASK_PRIORITY      (configMAX_PRIORITIES - 1)
-
 uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
 
-/**
- * Network information
-*/
-/* The MAC address array is not declared const as the MAC address will
-normally be read from an EEPROM and not hard coded (in real deployed
-applications).*/
-static uint8_t ucMACAddress[ 6 ] = { 0x00, 0x02, 0xF7, 0x00, 0x74, 0x15 };  // mac of my MPS3 eth
-/* Define the network addressing.  These parameters will be used if either
-ipconfigUDE_DHCP is 0 or if ipconfigUSE_DHCP is 1 but DHCP auto configuration
-failed. */
-static uint8_t ucIPAddress[ 4 ] = { 192, 168, 1, 215 };
-static uint8_t ucNetMask[ 4 ] = { 255, 0, 0, 0 };
-static uint8_t ucGatewayAddress[ 4 ] = { 10, 10, 10, 1 };
-/* The following is the address of an OpenDNS server. */
-static uint8_t ucDNSServerAddress[ 4 ] = { 208, 67, 222, 222 };
-
-psa_key_handle_t xOTACodeVerifyKeyHandle = NULL;
+/*
+ * Main task to run TFM and ethernet communication testing
+ */
+static void blink_task( void *pvParameters )
+{
+    uint32_t *fpgaio_leds = (uint32_t *)0x49302000;
+    const TickType_t xDelay = portTICK_PERIOD_MS * 200;
+
+    printf("FreeRTOS blink task started\r\n");
+    while (1) {
+        *fpgaio_leds = 0xFF;
+        printf("LED on\r\n");
+        vTaskDelay(xDelay);
+        *fpgaio_leds = 0x00;
+        printf("LED off\r\n");
+        vTaskDelay(xDelay);
+    }
+}
 
 int main()
 {
-    BaseType_t ret = pdPASS;
-
     tfm_ns_interface_init();
-
     serial_init();
 
-    xTaskCreate(blink_task, "blink task", configMINIMAL_STACK_SIZE*2, NULL, tskIDLE_PRIORITY,   NULL);
+    xTaskCreate(blink_task, "test task", configMINIMAL_STACK_SIZE*2, NULL, configMAX_PRIORITIES-2, NULL);
 
-    printf("starting scheduler from ns main\r\n");
     /* Start the scheduler itself. */
     vTaskStartScheduler();
 
@@ -106,21 +76,9 @@ int main()
 }
 
 /**
- * @brief Implements libc calloc semantics using the FreeRTOS heap
- */
-static void * prvCalloc( size_t xNmemb, size_t xSize )
-{
-    void * pvNew = pvPortMalloc( xNmemb * xSize );
-
-    if( NULL != pvNew )
-    {
-        memset( pvNew, 0, xNmemb * xSize );
-    }
-
-    return pvNew;
-}
-
+ * @brief   Defines the Ethos-U interrupt handler: just a wrapper around the default
+ *          implementation.
+ **/
 void arm_npu_irq_handler(void)
 {
-    // Do nothing.
 }

blinky/tests/test_blinky.py

@@ -21,29 +21,34 @@ import pytest
 
 @pytest.fixture
 def fvp_path():
-    yield '/opt/FVP_Corstone_SSE-300_Ethos-U55/models/Linux64_GCC-6.4/FVP_Corstone_SSE-300_Ethos-U55'
+    yield 'VHT-Corstone-300.x'
 
 @pytest.fixture
 def binary_path():
-    yield os.getcwd() + '/../Objects'
+    yield os.path.dirname(os.path.abspath(__file__)) + '/../../build'
+
+@pytest.fixture
+def vsi_script_path():
+    yield os.path.dirname(os.path.abspath(__file__)) + '/../../lib/VHT/interface/audio/python'
 
 @pytest.fixture(scope="function")
-def fvp(fvp_path, binary_path):
+def fvp(fvp_path, binary_path, vsi_script_path):
     # Fixture of the FVP, when it returns, the FVP is started and 
     # traces are accessible through the .stdout of the object returned.
     # When the test is terminated, the FVP subprocess is closed.
     # Note: It can take few seconds to terminate the FVP 
     cmdline = [
         fvp_path, 
-        '-a',  f<