摘要
LED(发光二极管)显示通常要占用单片机的并行口,往往在控制系统中有一定的局限性。为此,采用80C51单片机串行口和I/O扩展芯片扩展并行口,设计了一个8位LED显示驱动电路,通过对串行口动态扫描,把要显示的数据从单片机的串行口送到LED显示器的字段和字位,从而实现用单片机最少的外部资源达到最佳的显示效果。
LED display is widely in use. But it usually occupies MCU＇ s parallel port, which means some limitations for control systems. So we find another method to achieve this goal with dynamically scanning MCU＇ s serial port and sending the data＇from MCU＇ s serial port to LED display, and realize the best display effect by using the least MCU＇ s resources.
出处
《电子工程师》
2006年第6期31-32,共2页
Electronic Engineer
