这是一个verilog HDL 语言的例子，在CPLD器件EPM240上实现了 RS232协议、按键处理、LED数码管显示和每秒加1数码显示。使用quartus ii 7.0 以上打开.,This is an example of verilog HDL language in the CPLD device EPM240 achieved RS232 agreement, deal button, LED digital tube display and digital display plu

用 epm240 驱动 adc0804 这个芯片,本实验用状态机来控制。-Epm240 Driver adc0804 with this chip, the state machine to control the experiment.