[STM32F4] [Ginkgo Technology ARM+FPGA] iCore3 transplant RT-Thread--network function

Project description

With the diversification of embedded system functions and the wide application of networks in various fields, embedded devices with network functions have higher use value and stronger versatility. The RT-Thread system provides a set of SAL (Socket Abstraction Layer) components to facilitate our network-related development. iCore3 is equipped with W5500 network interface, this time we bring rt-thread+SAL+W5500 Ethernet communication.