飞思卡尔单片机用PDIUSBD12和电脑通信，包括通用驱动，周立功的easyd12.dll和自写的VB测试程序控制B口上的两个小灯 用I/O口模拟总线和PDIUSBD12数据交换-frescale Microcontroller with PDIUSBD12 and computer communications, including general-purpose-driven, ZLG easyd12.dll and self-written by the VB test program c