包含三个程序 CpuTimer－－TIMER0定时器实验 EXRAM－－扩展RAM读写实验 led_flash－－LED灯闪实验-Contains three procedures CpuTimer- TIMER0 timer test EXRAM- expanded RAM read and write experimental led_flash- LED light flash experiment

C51单片机加载DSP程序，DSP是5402,只需稍加修改就可以用于ARM等芯片-C51 microcontroller program load DSP, DSP is 5402, just a little modification can be used for ARM chips, etc.

5402单片机定时器程序，C语言编写，简单明了，适合初学者，可直接使用-5402 microcontroller timer process, C language, simple and clear, suitable for beginners, can be used directly