Demo主要内容：485总线，CAN总线，IIC，AD采集数字量，SCI中断发送（接收），SPI，流水灯等等，如果软件开发环境已准备好，可直接打开Demo编译下载，无需其他配置。(The main contents: 485 Demo bus, CAN bus, IIC, AD digital acquisition, SCI interrupt send (receive), SPI, light water and so on, if the software development env