【摘要】 提出了一种利用Motorola公司新推出的单片机MC68HC908JL8设计的LED汉字点阵显示屏的方案。该方案避免传统设计的缺陷,将PC机生成的汉字字模直接发送给单片机,由单片机负责接收、屏幕刷新显示等工作。该LED汉字点阵显示屏的硬件电路采用了"串行移位+锁存+驱动"的结构,并给出了采用这种硬件结构的设计原理分析,然后对应整个硬件系统进行了单片机方和PC机方的程序设计。最后给出了其设计流程及技术实现的要点,对其中的技术难点进行了简明的分析。更多还原

【Abstract】 Puts forward a design scheme of a LED display screen controlled by Motorola MCU. This design avoids traditional limitation. Chinese characters lattices produced by PC are sent to MCU,then MCU is in charge of receiving,refurbishing screen etc. In this paper,the design of hardware adopts structure of "serial move+ flip-latch+ drive" and it presents its design thinking,which is followed program design of MCU and PC for the hardware. At last, this paper gives flow chart of software, main point of each step, especially giving brachylogy analysis of difficulty.更多还原