DSP与液晶显示器接口及程序设计

Interface and Corresponding Program Design Between DSP and LCD

在由DSP驱动LCD的显示系统中,为了防止数据传输过程中的数据丢失,提高整个显示系统的稳定性,针对DSP高工频与LCD读写数据的时序不匹配,提出了更为经济实用的软件处理的解决方案,解决了常用的硬件锁存方法资源占用过多的问题。实践表明这种方案很好地解决了DSP对LCD驱动与显示问题,节省了I/O端口资源,文中给出相应的部分硬件接口电路和相应的程序代码。

In the display system of LCD driven by DSP, in order to improve the stabilization of the system through avoiding losing data in communication, the author proposes a software resolution. This new method is based on the consideration of mismatch between the high frequency characteristic of the DSP and time schedule requirement of LCD. It is more useful and economical compared with traditional latch resolution. In practice, it not only solves the driving and display problems between DSP and LCD, but also saves the I/O ports. The article provides the circuit of the interface and corresponding software program.