Introduction - If you have any usage issues, please Google them yourself
SPI interface is dangerous, LED data display 1, the program output data through the SPI interface to the HC595 chip data-driven pipe simple LED display. 2, internal 1 M crystal, procedures using single task mode, the software latency. 3, to conduct this experiment JP1 plug in all the eight short-circuit block, JP6 (SPI_EN) short-circuit block.