This sample demonstrates how Azure Sphere and Azure RTOS are able to run together on MT3620 Development Kit.

This sample app for an MT3620 real-time core running Azure RTOS that creates several threads and repeatedly transmits message over a UART. These messages can be read in terminal application on a computer using a USB-to-serial adapter. By default, it uses the real-time core's dedicated UART, but if your hardware doesn't expose this UART's TX pin, then the sample can be altered to use a different UART.

To use this sample, clone the repository locally if you haven't already done so:

git clone --recursive https://github.com/Azure-Samples/Azure-RTOS-on-Azure-Sphere-Mediatek-MT3620

1. Seeed MT3620 Development Kit or other hardware that implements the MT3620 Reference Development Board (RDB) design.

2. A USB-to-serial adapter (for example, FTDI Friend) to connect the real-time core UART to a USB port on your computer.

3. A terminal emulator (such as Telnet or Termite to display the output.

To prepare your device on Windows:

1. Right-click the Azure Sphere Developer Command Prompt shortcut and select More>Run as administrator.

   The --EnableRTCoreDebugging parameter requires administrator privilege because it installs USB drivers for the debugger.

2. Enter the following azsphere command:

   azsphere device enable-development --enablertcoredebugging

3. Close the window after the command completes because administrator privilege is no longer required. As a best practice, you should always use the lowest privilege that can accomplish a task.

To prepare your device on Linux:

1. Enter the following azsphere command:

   azsphere device enable-development --enablertcoredebugging

You may need to update the OS by using if you have an older device.

azsphere device recover

To prepare your hardware to display output from the sample:

1. Attach the USB-to-serial adapter to your PC.

For Seeed RDB

1. Connect GND on the USB-to-serial adapter to GND on your dev kit. On MT3620 RDB hardware, GND is Header 2, pin 2.

2. Connect RX on the USB-to-serial adapter to TXD0 on your dev kit. On MT3620 RDB hardware, TXD0 is Header 2, pin 3.

For Avnet Azure Sphere Starter Kit

1. Connect GND on the USB-to-serial adapter to GND on your dev kit. On Avnet Azure Sphere Starter Kit hardware, GND is Click Socket #1, Header 2, pin 8.

2. Connect RX on the USB-to-serial adapter to TXD0 on your dev kit. On Avnet Azure Sphere Starter Kit hardware, TXD0 is Click Socket #1, Header 2, pin 4.

For Windows:

1. Determine which COM port the adapter uses on the PC. If you're using the FTDI Friend adapter, start Device Manager, select View > Devices by container, and look for FT232R USB UART.

2. On the PC, start a terminal emulator and then open a 115200-8-N-1 terminal to the COM port used by the adapter.

For Linux:

1. Find out which port the serial device is connected to:

   dmesg | grep ttyUSB

   The port should be named ttyUSBn, where n indicates the port number.

2. Set up a terminal program to monitor the port. For example, the following commands set up Minicom to monitor port 5, but you can use any program you prefer:

   sudo apt install minicom
   
   sudo minicom -D /dev/ttyUSB5 -b 115200

See tutorial to learn how to build and deploy this sample: Tutorial: Build a real-time capable application

Note: You need Azure Sphere SDK version >= 20.07 to build and run the sample.

The connected terminal emulator should display output from the demo_threadx program. The program outputs the threads status incrementally:

• Install the SDK
• Claim your device
• Update the OS on an early dev kit

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.opensource.microsoft.com.

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This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.