atmega16通过SPI驱动AD7705的程序-ATmega16 driver AD7705 through SPI program

使用51单片驱动ADC芯片AD7705，使用模拟SPI的方式对AD7705进行读写操作。-Use of 51 single-chip driver ADC chip AD7705, use of the method of simulation SPI to read and write operations AD7705.