ST7920驱动的12864液晶的3线串行驱动模式-12864 ST7920-driven 3-wire serial LCD drive mode

12864液晶用串行2_pin的方式驱动，移植到s12单片机上，可以用较少的管脚驱动12864液晶，该方法简单方便，占用单片机资源较少，很好用-12864 with serial the way 2_pin drive, ported to S12 microcontroller 12864 can be driven with fewer pins, the method is simple and convenient, take up less single-chip resources,