用STAR ES598PCI单板开发机设计一个与七段LED显示器，显示一个倒计时时钟，设置一个初值，初值的设置按照时间制，超过最大值显示“ERROR”，按任意键接着设置。该初值每隔一秒改变一次并显示改变后的值，LED显示器显示天、时、分、秒的动态值。倒计时结束后显示“OVER”。-STAR ES598PCI single board machine with the development of a seven-segment LED display designed to show a countdown clock, set an initial value, initial value is set in accordance with time, more than the maximum display " ERROR" , then press any key to set. The initial value of every second to change the time and shows the value after the change, LED display shows days, hours, minutes and seconds, the dynamic value. After the countdown displays " OVER" .