注意：只有C代码。串行驱动led显示，一个74hc595位移寄存器驱动三极管驱动led位，两个74hc595驱动led段，方式位5位x8段x2=10个数码管5分频，每次扫描时间位1.25ms-Note: Only C code. Serial driver led display, a shift register 74hc595 drive transistor drive led, and led two drives 74hc595 paragraph, ways x8 paragraph

74HC595驱动8个数码管，包含原理图，汇编，C语言源代码，完整keil工程文件，可无缝移植-74HC595 digital tube driver 8, including schematic, assembler, C language source code, complete the keil project file can seamlessly transplant