状态机的VHDL实现，在quartus-ii7.2上测试通过，文件包括米利状态机，摩尔状态机，ADC0809的状态机实现，序列检测器和定时去毛刺的状态机实现。-State machine code in VHDL,successfully tested in quartus-ii7.2,the file contains mealy state machine,moore state machine,ADC 0809 and sequence detector achieved in state

利用VHDL编写SPI传输与接收协议，发送单字节信息，状态机思想-Use VHDL to write SPI transmission and receiving protocol, send a single-byte information, the state machine