Memfault Network Example

Example application for ModusToolbox, loosely based on the mtb-example-anycloud-secure-tcp-client application.

This code example demonstrates the integration of Memfault with PSoC™ 6 MCU with AIROC™ CYW43xxx Wi-Fi & Bluetooth® combo chips.

For step by steps on how to integrate the memfault-firmware-sdk into your own project, see the following guide: https://mflt.io/mtb-integration-guide

This example application was tested with the following setup:

• PSoC™ 62S2 Wi-Fi Bluetooth® pioneer kit
• (CY8CKIT-062S2-43012) using GNU Arm® embedded compiler v10.3.1 (GCC_ARM)

Requirements

• ModusToolbox™ software v3.0 or later (tested with v3.0)
• PSoC™ 6 Board support package (BSP) minimum required version: 4.0.0
• Programming language: C
• Associated parts: All PSoC™ 6 MCU

Hardware setup

This example uses the board's default configuration. See the kit user guide to ensure that the board is configured correctly.

Note: The PSoC™ 6 Bluetooth® LE pioneer kit (CY8CKIT-062-BLE) and the PSoC™ 6 Wi-Fi Bluetooth® pioneer kit (CY8CKIT-062-WIFI-BT) ship with KitProg2 installed. The ModusToolbox™ software requires KitProg3. Before using this code example, make sure that the board is upgraded to KitProg3. The tool and instructions are available in the Firmware Loader GitHub repository. If you do not upgrade, you will see an error like "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".

Software setup

Install a terminal emulator if you don't have one such as minterm or Tera Term.

Install a Python interpreter if you don't have one. This code example is tested using Python 3.7.7.

Install the Python package mflt_build_id in your Python system packages.

Using the code example

Operation

1. Connect the board to your PC using the provided USB cable through the KitProg3 USB connector.

2. The kit is configured to run in Wi-Fi STA interface mode.

   1. Modify the WIFI_SSID, WIFI_PASSWORD macros to match that of the Wi-Fi network credentials that you want to connect to. These macros are defined in the source/memfault_example_app.h file.
   2. (Optional) If compile-time configuration is not available, the commands wifi_scan, wifi_join, wifi_save are provided to scan for networks, join a found network, and save a network for auto-conneciton at boot.

3. If you already have a Memfault account, navigate here to create a project key. (If you do not have an account sign up for a Memfault account here and create a project). Modify the MEMFAULT_PROJECT_KEY macro in source/memfault_example_app.h file.

4. Setup up the application using one of the following:

   Using Eclipse IDE for ModusToolbox™ software

   1. Select New Application from the Quick Panel
   2. Select your board
   3. Select Memfault Network Example from the Wi-Fi section
   4. After the application is created, with the application selected in the projects panel, click Build Application from the Quick Panel
   Using CLI

   1. Create a workspace directory. This workspace directory will contain both the application and the shared libraries setup by ModusToolbox.

   2. Clone the application into your workspace directory.

      # From your workspace directory
      git clone https://github.com/memfault/mtb-example-memfault.git

   3. Navigate into the application root and run:

      # modify the BSP name as necessary
      BSP_NAME="CY8CKIT-062S2-43012"
      <PATH_TO_MODUS_TOOLS>/library-manager/library-manager-cli --project . --add-bsp-name ${BSP_NAME} --add-bsp-version latest-v4.X --add-bsp-location "local"
      <PATH_TO_MODUS_TOOLS>/library-manager/library-manager-cli --project . --set-active-bsp APP_${BSP_NAME}
      make build

5. Open a terminal program and select the KitProg3 COM port. Set the serial port parameters to 8N1 and 115200 baud.

6. Program the board using one of the following:

   Using Eclipse IDE for ModusToolbox™ software

   1. Select the application project in the Project Explorer.

   2. In the Quick Panel, scroll down, and click <Application Name> Program (KitProg3_MiniProg4).

   Using CLI

   From the terminal, execute the make program command to build and program the application using the default toolchain to the default target. The default toolchain and target are specified in the application's Makefile but you can override those values manually:

   make program TARGET=<BSP> TOOLCHAIN=<toolchain>

   Example:

   make program TARGET=CY8CPROTO-062-4343W TOOLCHAIN=GCC_ARM

7. Upload the symbol file to see decoded data on the Memfault web app (upload the .elf file, either via the web app or using the Memfault CLI tool)

Running the Example Application

The board will automatically attempt to bring up the network interface on boot. If it fails, posting data from the board will not work, but the CLI will still be available for manually uploading chunk data. On success you should see something like the following:

[I] Memfault Build ID: 1d63b5daaa91c74ad352d16533417604219beec1
[I] S/N: DEMOSERIAL
[I] SW type: app-fw
[I] SW version: 1.0.0-dev
[I] HW version: dvt1
[I] Reset Reason, Cy_SysLib_GetResetReason=0x10
[I] Reset Cause:
[I]  Software Reset
[I] Memfault Initialized!

WLAN MAC Address : C4:AC:59:9C:5C:5C
WLAN Firmware    : wl0: Apr 12 2022 20:39:36 version 13.10.271.287 (760d561 CY) FWID 01-b438e2a0
WLAN CLM         : API: 18.2 Data: 9.10.0 Compiler: 1.36.1 ClmImport: 1.34.1 Creation: 2021-04-26 04:01:15
WHD VERSION      : v2.3.0 : v2.3.0 : GCC 10.3 : 2022-04-13 14:02:24 +0800
[I] Wi-Fi Connection Manager initialized.
[I] Successfully connected to Wi-Fi network
[I] IPv4 address assigned: 192.168.1.19

[I] Secure Socket initialized
[I] Global trusted RootCA certificate loaded
[I] Posting Memfault Data...
[D] Response Complete: Parse Status 0 HTTP Status 202!
[D] Body: Accepted

To see debug options, run the help command:

mflt> help
get_core: Get coredump info
clear_core: Clear an existing coredump
crash: Trigger a crash
trigger_logs: Trigger capture of current log buffer contents
drain_chunks: Flushes queued Memfault data. To upload data see https://mflt.io/posting-chunks-with-gdb
trace: Capture an example trace event
get_device_info: Get device info
reboot: Reboot system and tracks it with a trace event
export: Export base64-encoded chunks. To upload data see https://mflt.io/chunk-data-export
help: Lists all commands

An example crash can be forced using the crash command:

mflt> crash 1
[... device will reboot and post data on reboot ...]
[I] Memfault Build ID: 5f455f3ce017f5f93666dfbc6fa016b680b72901
[I] S/N: DEMOSERIAL
[I] SW type: app-fw
[I] SW version: 1.0.0-dev
[I] HW version: dvt1
[I] Reset Reason, Cy_SysLib_GetResetReason=0x10
[I] Reset Cause:
[I]  Software Reset
[I] Memfault Initialized!

mflt> WLAN MAC Address : C4:AC:59:9C:5C:5C
WLAN Firmware    : wl0: Apr 12 2022 20:39:36 version 13.10.271.287 (760d561 CY) FWID 01-b438e2a0
WLAN CLM         : API: 18.2 Data: 9.10.0 Compiler: 1.36.1 ClmImport: 1.34.1 Creation: 2021-04-26 04:01:15
WHD VERSION      : v2.3.0 : v2.3.0 : GCC 10.3 : 2022-04-13 14:02:24 +0800
[I] Wi-Fi Connection Manager initialized.
[I] Successfully connected to Wi-Fi network 'MyCharterWiFif2-2G'
[I] IPv4 address assigned: 192.168.1.19

[I] Secure Socket initialized
[I] Global trusted RootCA certificate loaded
[D] Response Complete: Parse Status 0 HTTP Status 202!
[D] Body: Accepted
[D] Response Complete: Parse Status 0 HTTP Status 202!
[D] Body: Accepted

Another way to trigger a crash is via the user buttons. User Button 1 will trigger a hard fault, while User Button 2 will trigger an assertion.

A 1-minute timer runs that will attempt to upload any data generated by the Memfault library (core dumps, metrics, etc). For more information about how to use the demo CLI, refer to https://mflt.io/demo-cli

Debugging

You can debug the example to step through the code. In the IDE, use the <Application Name> Debug (KitProg3_MiniProg4) configuration in the Quick Panel. For details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ software user guide.

Note: (Only while debugging) On the CM4 CPU, some code in main() may execute before the debugger halts at the beginning of main(). This means that some code executes twice – once before the debugger stops execution, and again after the debugger resets the program counter to the beginning of main(). See KBA231071 to learn about this and for the workaround.

Design and implementation

Resources and settings

Table 1. Application resources

Resource	Alias/object	Purpose
SDIO (HAL)	sdio_obj	SDIO interface for Wi-Fi connectivity
UART (HAL)	cy_retarget_io_uart_obj	UART HAL object used by retarget-io for debug UART port
LED (BSP)	CYBSP_USER_LED	User LED to show output

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This example uses the Arm® Cortex®-M4 (CM4) CPU of PSoC™ 6 MCU to execute an RTOS task (TCP client task). At device reset, the default Cortex®-M0+ (CM0+) application enables the CM4 CPU and configures the CM0+ CPU to go to sleep.

In this example, the TCP client establishes a secure connection with a TCP server through SSL handshake. During the SSL handshake, the client presents its SSL certificate (self-signed) for verification and also verifies the server's identity to which it is connecting. Once the SSL handshake completes successfully, the TCP client controls the user LED ON or OFF based on the command received from the TCP server.

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Related resources

Resources	Links
Application notes	AN228571 – Getting started with PSoC™ 6 MCU on ModusToolbox™ software AN215656 – PSoC™ 6 MCU: Dual-CPU system design
Device documentation	PSoC™ 6 MCU datasheets PSoC™ 6 technical reference manuals
Development kits	Select your kits from the Evaluation board finder
Libraries on GitHub	mtb-pdl-cat1 – PSoC™ 6 peripheral driver library (PDL) mtb-hal-cat1 – Hardware abstraction layer (HAL) library retarget-io – Utility library to retarget STDIO messages to a UART port
Middleware on GitHub	capsense – CAPSENSE™ library and documents psoc6-middleware – Links to all PSoC™ 6 MCU middleware
Tools	Eclipse IDE for ModusToolbox™ software – ModusToolbox™ software is a collection of easy-to-use software and tools enabling rapid development with Infineon MCUs, covering applications from embedded sense and control to wireless and cloud-connected systems using AIROC™ Wi-Fi and Bluetooth® connectivity devices.

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Other resources

Infineon provides a wealth of data at www.infineon.com to help you select the right device, and quickly and effectively integrate it into your design.

For PSoC™ 6 MCU devices, see How to design with PSoC™ 6 MCU – KBA223067 in the Infineon community.

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