这是基于small rtos操作系统的在51系列单片机上实现的一个数字钟，用proteus仿真实现，用原理图，可以在硬件上直接运行，但必须注意要用89S52或者更大ram的芯片。-This is based on small rtos operating system in the 51 series microcontroller implemented on a digital clock, with proteus simulation to achieve, with schematic