*ethernet hardware: ENC28J60
*cpu :stm32f103RCT6
//using SPI2 to drive ENC28J60
//PB13, 14 and 15 are SPI2 pins
//PB12 is CS pin
//Abort RST pin
*CPU as Server :IP=192.168.200.16, port=1200
*CPU as Client :HOST IP=192.168.200.3, port=1400
*HTTP has no function yet