Contents of this document

1
Hardware Setup
2
Get Software
3
Setup Your AWS Account
4
Build, Run
5
Debugging

1. Hardware Setup

The S32K3X4EVB-T172, an evaluation and development board for general-purpose industrial and automotive applications, is needed for starting this demo.

Note: The +12 V power supply and micro USB cable are not part of the package. The +12 V connector is a center-positive barrel type with outer 5.5 mm and inner 2.1 mm diameter. Additionally, all demos require Internet connection and in order to test them, an Ethernet Media Converter is required. The following NXP product can be used: RDDRONE-T1ADAPT.

1.1 Get Familiar With the Board

Based on the 32-bit Arm Cortex-M7 S32K3 MCU in a 172 HDQFP package, the S32K3X4EVB-T172 offers dual cores configured in lockstep mode, ASIL D safety hardware, HSE security engine, OTA support, advanced connectivity and low power.

The S32K3X4EVB-T172 offers a standard-based form factor compatible with the Arduino^® UNO pin layout, providing a broad range of expansion board options for quick application prototyping and demonstration.

Additional information can be found in the HW User Manual (sign in on the NXP website required). Visit S32K3X4EVB-T172 web page for general information including features, block diagrams and design resources.

Mark as complete:1.1 Get Familiar With the Board

1.2 Set Up Jumpers in the S32K3X4EVB-T172 Evaluation Board

Default Jumper settings

Jumper	State	Notes
`J1`	CLOSED	Disabled FS26 watchdog after power-up
`J5`	1-2	Select voltage level for FS26 DEBUG pin
`J8`	CLOSED	External circuits powered from VDD_HV_B domain
`J9`	CLOSED	External circuits powered from VDD_HV_A domain
`J427`	CLOSED	The MCU peripherals powered from the VDD_HV_A domain
`J15`	CLOSED	The MCU peripherals powered from the VDD_HV_B domain
`J18`	1-2	5 V for the VDD_HV_A domain
`J13`	1-2	3.3 V for the VDD_HV_B domain
`J20`	OPEN	LIN1 Commander* mode
`J22`	1-2	5 V from FS26 SBC
`J24`	OPEN	LIN2 Commander* mode
`J26`	CLOSED	3.3 V from FS26 SBC
`J30`	OPEN	FS26 wake inputs
`J31`	1-2	V15 domain powered from FS26 SBC
`J44`	OPEN	On-board debugger UART pins
`J423`	CLOSED	12 V from `J14` connector
`J424`	CLOSED	Connect 3.3 V voltage signal with 3.3 V MCU power domain option

*Master in the LIN standard document.

Mark as complete:1.2 Set Up Jumpers in the S32K3X4EVB-T172 Evaluation Board

1.3 Plug in the Power Supply

Switch SW1 to the OFF position (fully to the right).

Connect the 12 V power supply adapter and switch SW1 to the ON position (fully to the left).

When power is applied to the EVB, four orange LED's adjacent to the voltage regulators show the presence of the supply voltages (12 V, 5 V, 3.3 V and 1.5 V).

Note: This power-up procedure ensures that FS26 SBC starts with disabled watchdog.

Mark as complete:1.3 Plug in the Power Supply

1.4 Connect the Debugger Cable

Connect a micro-USB cable to the J40 connector to debug via the on-board S32K3 debugger.

Or use JTAG connector to to connect external S32K3 debugger.

Additional information about setting up the hardware can be found in Chapter 6 (S32K3X4EVB-T172 - Startup) of the HW User Manual (sign in on the NXP website required).

Mark as complete:1.4 Connect the Debugger Cable

1.5 Ethernet Connection

100BASE-T1 2-Wire Automotive Ethernet provides 100 Mbps connections over simple twisted 2-wires for a distance of up to 15 meters. The line signaling on the wire is not directly compatible with traditional 100BASE-TX (RJ45) connections, but a physical adapter may be used. Otherwise it is the same as traditional Ethernet. The picture below describes the setup.

Mark as complete:1.5 Ethernet Connection

NextGet Software

3. Setup Your AWS Account

If you do not have an existing AWS account and user, refer to the online AWS documentation at Set up your AWS Account . To get started, follow the steps outlined in the sections below:

Pay special attention to the Notes.

3.1 Create Resources in AWS IoT

Refer to the online AWS documentation at Create AWS IoT Resources . Follow the steps outlined in these sections to provision resources for your device:

Pay special attention to the Notes.

Mark as complete:3.1 Create Resources in AWS IoT

3.2 Provision the Device With Credentials

Provisioning the device with credentials is showcased in the aws_pkcs11_mqtt_s32k344 demo. In addition to the standard MQTT example, this example uses the corePKCS11 library to provision the device with the client certificate and private key. The corePKCS11 library is integrated with the S32K3 hardware security engine (HSE).

An additional macro was added to the configuration in demo_config.h: #define democonfigPROVISION_DEVICE

This macro must be defined to enable provisioning of the device with the client certificate and private key defined below. After running the example once, the macro can be undefined, as the certificate will be stored in FLASH and the private key in the HSE.

The provisioning is implemented in the vDevModeKeyProvisioning() function implemented in src/ aws_dev_mode_key_provisioning.c. This function is invoked by the InitTask() located in src/main.c, if the democonfigPROVISION_DEVICE macro is defined.

Alternatively, the mbedTLS library included in NXP AWS IoT Core can be used, also integrated with the S32K3 hardware security engine (HSE).

Mark as complete:3.2 Provision the Device With Credentials

PreviousGet Software

NextBuild, Run

4. Build, Run

NXP AWS IoT Core contains several demos showcasing the AWS IoT Core connectivity. The steps describing how to import, build and run the demo apply to all the included demos, but we recommend starting with the aws_mqtt_s32k344 demo to confirm that the device is able to communicate with AWS IoT Core.

4.1 Create S32DS Project Starting From the aws_mqtt_s32k344 Example

After opening S32 Design Studio, go to File → New S32DS Project From Example and select aws_mqtt_s32k344 (you can search it by typing aws into the search box). Then click on Finish.

Mark as complete:4.1 Create S32DS Project Starting From the aws_mqtt_s32k344 Example

4.2 Configure demo_config.h

In order to successfully build the project and connect to AWS IoT Core the include/demo_config.h file must be filled in with information regarding the AWS IoT endpoint and the IoT thing created in the Create resources in AWS IoT section.

A few macros are mandatory (they are commented out in the file as a reference, but should be defined by the user):

democonfigMQTT_BROKER_ENDPOINT
democonfigMQTT_BROKER_PORT
democonfigROOT_CA_PEM
democonfigCLIENT_CERTIFICATE_PEM
democonfigCLIENT_PRIVATE_KEY_PEM

Details on how to set up each of the macro can be found in the include/demo_config.h file comments.

Mark as complete:4.2 Configure demo_config.h

4.3 Generate Configuration Code

Double click on aws_mqtt_s32k344.mex file or open the peripherals view by clicking the symbol (mentioned below) on the upper right corner of S32 DS.

Select the current project (aws_mqtt_s32k344) from the top left of the window.

The configuration of the different components can be updated by selecting any of them (not needed for the current example). This is an example of how the aws component looks like:

Click on the Update Code button (green when there are new configuration files to be generated).

Wait for the code generation to be completed before continuing to the next step (when the Update Code message in the lower right disappears).

Mark as complete:4.3 Generate Configuration Code

4.4 Build the Project

Switch again to the C/C++ perspective by clicking the symbol on the upper right corner of S32 DS.

Click on the Build button.

Wait for the build action to be completed before continuing to the next step.

Mark as complete:4.4 Build the Project

4.5 Run the Demo

Connect the debugger, connect the board to the Internet through the J428 port and power it up as described in the Set up device hardware section.

Click on the downward arrow corresponding to the Debug button in S32 DS and select Debug Configurations…. Select aws_mqtt_s32k344_Debug_FLASH_PNE and click on the Debug button.

Wait until the debug session is started and then click the Resume button to continue the execution of the application.

Mark as complete:4.5 Run the Demo

4.6 Verify Messages in AWS IoT Core

From the AWS IoT Core console , select Test from the navigation pane, and choose MQTT test client. Select Subscribe to a topic, enter the topic (or use the # wildcard to see all topics) and then choose Subscribe. You should see messages being displayed as they are received.

Mark as complete:4.6 Verify Messages in AWS IoT Core

PreviousSetup Your AWS Account

NextDebugging

5. Debugging

5.1 Debugging

You can check the progress of the execution by attaching a serial terminal on the virtual COM associated to the OpenSDA interface (which can be checked in Device Manager).

When the example starts running, a log similar to this will be printed:

If execution is successful, besides verifying the MQTT messages are received by AWS IoT Core as described in the Verify messages in AWS IoT Core section, you should see the following message at the end of the execution:

The logging levels can be updated from the Peripherals view, accessed as indicated in the Build & Run the demo section, step 3. The logging settings are in the Logging tab of the aws component:

If the logging settings or anything else is updated in the configurator, code will need to be generated and built again, as indicated in the Build & Run the demo section, steps 3 and 4.

When running the project as indicated in the Run the demo section, you can use the debugger embedded in S32 Design Studio (e.g. you can set breakpoints before clicking Resume, or Pause the execution and inspect the currently executed code). Details regarding debugging can be found in the S32DS User Guide (Chapter Debugging), located in the S32 Design Studio installation:

<S32DS install dir>/S32DS/help/pdf/S32DS_User_Guide.pdf

Mark as complete:5.1 Debugging

PreviousBuild, Run

NextProject and Tutorials: Demos

Demos

NXP AWS IoT Core support product offers the following S32 Design Studio projects as examples

aws_mqtt_s32k344

This example is used to create an MQTT connection to your AWS IoT account. The device will publish MQTT topic messages to the AWS endpoint and is able to receive publish messages from the server to which it will reply with acknowledgement messages.

This example project was created based on the MQTT_Mutual_Auth demo .

aws_pkcs11_mqtt_s32k344

In addition to the standard MQTT example, this example uses corePKCS11 to provision the device with the client certificate and private key.

This example project was created based on the corePKCS11_MQTT_Mutual_Auth demo .

aws_ota_s32k344

This example is used to showcase the capabilities of over-the-air update in AWS IoT Core.

The example starts the OTA Agent and listens for incoming updates requests from the AWS server. Once the update starts, a new firmware image will be downloaded to flash and the device will restart, loading the new image.

This example project was created based on the Ota demo.

aws_defender_s32k344

This demo creates a single application task that demonstrates how to collect metrics, construct a device defender report in JSON format, and submit it to the AWS IoT Device Defender service through a secure MQTT connection to the AWS IoT MQTT Broker. The demo includes the standard networking metrics as well as custom metrics. For custom metrics, the demo includes:

A metric named ""task_numbers"" which is a list of FreeRTOS task IDs. The type of this metric is ""list of numbers""
A metric named ""stack_high_water_mark"" which is the stack high watermark for the demo application task. The type of this metric is ""number""

This example project was created based on the Device_Defender demo.

aws_shadow_s32k344

This demo shows how to use the AWS IoT Device Shadow library to connect to the AWS Device Shadow service. It uses the coreMQTT library to establish an MQTT connection with TLS (Mutual Authentication) to the AWS IoT MQTT Broker and the coreJSON library parser to parse shadow documents received from the AWS Shadow service.

The demo shows basic shadow operations, such as how to update a shadow document and how to delete a shadow document. The demo also shows how to register a callback function with the coreMQTT library to handle messages like the shadow /update and /update/delta messages that are sent from the AWS IoT Device Shadow service.

This example project was created based on the Device_Shadow demo.

aws_gg_demo_s32k344

This project is showcasing the Greengrass capability by connecting S32K344 running AWS IoT Core (representing a Greengrass device) to S32G2 RDB2 running GoldVIP (representing the Greengrass core) and publishing diagnostics to a SiteWise dashboard. It requires extra prerequisites, which are mentioned in the demo description.

For details regarding running the demos please consult the description.txt file of the examples.

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Support

Troubleshooting

This chapter describes some of the common problems which may be encountered while running the AWS IoT Core demo.

The Software Cannot Be Uploaded Into MCU and the Power Domain LEDs Blink Periodically

This is caused by the watchdog in Safety SBC that is not fed properly and resets MCU. In such a case do a power-up procedure according to the steps in Plug in the Power Supply section.

Demo Execution Stuck in InitHseMbedTls()

This problem indicates that the HSE FW was not properly installed. Please check again the steps in section Other software required to develop and debug applications for the device section.

Demo Execution Stuck in InitTask()

The board is getting an IP address trough DHCP. If the execution is stuck in the following loop:

while (!dhcp_supplied_address(&network_interfaces[i]))

it may indicate that the board is not supplied with an IP address, which can happen if the DHCP server is not working properly.

If you do not want to use DHCP, you can change the settings in the Peripherals view, in the tcpip_stack component, Netif tab.

ERROR: TLS Handshake Failed Trying to Connect. X509 - Certificate Verification Failed

Seeing this error in the serial log might indicate that validation of the server certificate is failing. One possible cause would be wrong configuration of the current time in the RTC. This can be updated either by directly modifying the generate/src/Rtc_Ip_BOARD_InitPeripherals_PBcfg.c file or updating the configuration in the Peripherals view and generating the code using Update Code:

For more information, refer to the AWS online documentation on Troubleshooting AWS IoT.

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