基于ARM S3C44B0X的LED显示屏设计

ARM S3C44B0X-based Design for LED Display Screen

为了简化LED显示屏的驱动电路,节约单片机的端口资源,对常见的LED显示屏驱动电路进行了改进,全部采用通用的串入并出移位寄存器作为选通驱动,系统全部采用串行数据控制,形成了一种只需4根信号线的LED显示屏驱动电路解决方案,仅需占用单片机的4个I/O端口发送串行数据就可以实现正常的显示功能,文中给出相应的程序代码。

In order to simplify driving circuit of LED display screen and reduce the occupation of microcontroller′s ports, the common driving circuit of LED display screen is improved in this design scheme. All of the strobe circuits are composed of general serial-in parallel-out shift registers and all of the control signals are sent with serial signals. Finally, a type of driving circuit of LED display screen is exploited that need only four signal wires. It takes microcontroller only four I/O ports to send serial data for normal display. The main code of the program is given in this article.