说明：  stm32系列cpu，can组网程序，实现多台can设备自动组网，自动确定网络中的唯一主机，主机挂掉，在其他设备中自动确定备用主机
(the the stm32 series cpu, can networking program, more than one can automatic device networking, automatically determines the only host in the network, host hang, and other devices to automatically determine alternate host)