步进电机 获取 PCI 卡 自动查找 PCI 卡资源及 IO 口基地址-Stepper motor to get a PCI card to automatically find the PCI card resources and IO port base address

由串口输出连续的数字信号，用PCI-6713的数字IO口采集后，经Labview程序取反并输出-Using serial port to generate a continuous digital signal, aquire it through PCI-6713 digital ports, reverse it and output it with Labview programm

研华板卡IO读取，采用的是研华板卡PCI-1756。(Advantech board IO read, using the Advantech board PCI-1756.)