| dc.description.abstract | In order to promote the development of Internet of Things (IoT), this study designs a complete IoT development platform, which provides a hardware single board computer and a software development environment to help shorten the development and deployment time of IoT applications.
The hardware single board computer is designed with Arm Cortex-M4 architecture microcontroller as the core, equipped with NOR flash memory storage system and Ethernet interface. The software uses the C language development environment, and plans a hierarchical modular project structure, using the GNU GCC toolchain and Makefile to construct application projects, and provides a series of development aids.
In order to simplify the development process, this study designs the In-System-Programming (ISP) programming function, which realizes the host-side command line programming tool and the microcontroller-side bootloader program. It consists of two main functions: UART ISP, which allows firmware updating through the connection with the host side, and Flash IAP, which manages the storage space through the LittleFS embedded file system and allows the boot program to be loaded from the on-board storage system.
In order to provide single board computers with networking capabilities, I designed Ethernet physical layer and media access control layer drivers, and ported lwIP, a lightweight TCP/IP protocol stack, and conducted a series of tests on TCP, UDP, and other protocols to validate their networking capabilities to cover a wide range of possible application scenarios, and finally conducted a conceptual validation of the Ethernet OTA function. Finally, the Ethernet Over-the-Top (OTA) feature was proof-of-concept. | en_US |