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Establishing serial communication over UART instead of USB in MAX25405 EVKIT

rsjawale24

The MAX25405EVKIT comes with a MAX32620FTHR board which is preprogrammed with custom binary file for the gesture recognition. The application note at Maxim Gesture Sensor EVKit Serial API (maximintegrated.com)

mentions "The serial interface can be implemented over the Universal Serial Bus (USB) virtual serial port or over a Universal Asynchronous Receiver-Transmitter (UART). The EV kit is shipped configured to use the USB serial port to work with the EV kit PC Graphical user Interface (GUI). If a UART serial interface is desired, custom firmware in binary format is available."

Upon researching more, I found the firmware_framework code that contains the code for gesture recognition compiled using mbed compiler.

The readme file says that a file called interface.h and interface.c define the communication protocol. When I open the interface.c file, I can see a comment in the code that says Option to implement serial API over UART instead of USB but there is only a MACRO set as #define macro_name 0 

I tried to change the 0 to 1 and compile the code, however, it does not compile successfully. The USBDevice library shows some error while compiling. 

Did anyone try to change the serial API over UART instead of USB? Was it successful?  

EDIT: I have successfully compiled the code for UART. However, I'll do some experiments and write introductory blogs before I re-program the MAX32620FTHR board with my firmware. 

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  • Just to say that I got this to compile, but I took a slightly different route along the way.

    I opened up Mbed Studio and created a new program from one of the available templates: mbed-os-example-blinky-baremetal-5

    This uses Mbed version 5.15.

    I then opened up Terminal in Mbed Studio and changed directory to the project folder.

    I then used the two commands as per readme.txt

    mbed add https://os.mbed.com/teams/MaximIntegrated/code/MAX32620FTHR/
mbed add https://os.mbed.com/teams/MaximIntegrated/code/USBDevice/

    I then unzipped the firmware_framework.zip file.

    I then used the following for my mbed_app.json

    {
    "requires": ["bare-metal"],
    "config": {
        "main-stack-size": {
            "value": 65536
        }
    }
}

    But when I tried to build the project it failed within Mbed Studio. This could well be because it is using ARMC6 as the default rather than GCC_ARM... I could probably change it inside Mbed Studio.

    But instead I existed and opened up terminal and then manually compiled using the command given in the readme file, namely

    mbed compile -t GCC_ARM -m MAX32620FTHR

    And it worked.

    Hope that helps.

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  • Just to say that I got this to compile, but I took a slightly different route along the way.

    I opened up Mbed Studio and created a new program from one of the available templates: mbed-os-example-blinky-baremetal-5

    This uses Mbed version 5.15.

    I then opened up Terminal in Mbed Studio and changed directory to the project folder.

    I then used the two commands as per readme.txt

    mbed add https://os.mbed.com/teams/MaximIntegrated/code/MAX32620FTHR/
mbed add https://os.mbed.com/teams/MaximIntegrated/code/USBDevice/

    I then unzipped the firmware_framework.zip file.

    I then used the following for my mbed_app.json

    {
    "requires": ["bare-metal"],
    "config": {
        "main-stack-size": {
            "value": 65536
        }
    }
}

    But when I tried to build the project it failed within Mbed Studio. This could well be because it is using ARMC6 as the default rather than GCC_ARM... I could probably change it inside Mbed Studio.

    But instead I existed and opened up terminal and then manually compiled using the command given in the readme file, namely

    mbed compile -t GCC_ARM -m MAX32620FTHR

    And it worked.

    Hope that helps.

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