Developing a C# Application for Nuvoton NANO100SD3BN Firmware Upgrade via UART-USB

, Oct 08, 2024|
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Title: Developing a C# Application for Nuvoton NANO100SD3BN Firmware Upgrade via UART-USB

Hello everyone,

I'm currently working on a project to develop a C# desktop application that allows users to upgrade the firmware of a device using the Nuvoton NANO100SD3BN microcontroller. The firmware is in Intel HEX format, and the communication will take place via a UART-USB interface, following Nuvoton's bootloader protocol. I'm seeking advice and best practices for the following aspects:

  1. UART Communication & Bootloader Mode:
    How can I establish reliable UART communication with the MCU and trigger it to enter bootloader mode for the firmware upgrade?

  2. Parsing Intel HEX Files:
    What’s the best way to handle parsing Intel HEX files and sending the firmware data in chunks over UART, ensuring proper checksums and handling ACK/NACK responses from the MCU?

  3. Bootloader Commands:
    Can someone provide guidance on the implementation of key bootloader commands such as flash erase, write, and device reboot after the new firmware is uploaded?

  4. Error Handling and Data Integrity:
    What strategies can I use to handle errors during the firmware upload and ensure the integrity of the uploaded data?

  5. Recommended Libraries/Tools:
    Are there any libraries or tools that could simplify UART communication, Intel HEX parsing, or bootloader protocol handling in C# development?

I’d appreciate any advice or examples from anyone who’s implemented something similar, as well as any recommended resources or documentation that would help me get started.

Thanks in advance for your help!