新华龙020 的内置spi0。驱动16位精度dac8831的程序，采用单端方式输出正弦波

新华龙单片机总线通信原理图，提供给那些作总线的同志-new microcontroller bus communication diagram provided to those comrades for Bus

新华龙020 的内置spi0。驱动16位精度dac8831的程序，采用单端方式输出正弦波-Hualong 020 new built-spi0. Dac8831 drive 16-bit accuracy of the procedures, the use of single-ended sine wave output

利用新华龙公司生产的C8051F020单片机驱动四相步进电机，可实现单拍、双拍、四相八拍的正转反转即变速功能。所需驱动电路由达林顿三极管组成-The use of single-chip four-phase stepper motor drive can achieve single-shot two-shot film of the eight four-phase reverse switch that is required f