SPI接口实险，动态LED数据管显示实验。

1、程序通过SPI接口输出数据到HC595芯片驱动LED数据管简单显示。

2、动态调度由片内定时器1中断产生，中断周期为5mS。

3、内部1 M晶振，程序采用单任务方式，软件延时。

4、进行此实验请插上JP1的所有8个短路块，JP6(SPI_EN)短路块。

AVR mega16学习板

数码管显示函数文件-SPI interface to real risk, dynamic LED tube showed that the experimental data. 1, the program through the SPI interface to drive the output data to the HC595 chip data management simple LED display. 2, dynamic scheduling by the on-chip Timer 1 interrupt generation, interrupt cycle 5mS. 3, the internal crystal oscillator 1 M, the program single-task mode, the software delay. 4, for this experiment JP1 plug in all the eight short blocks, JP6 (SPI_EN) short block. AVR mega16 learning board digital display function file