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跪求!!f28335xintf模块外接芯片(什么芯片都能行),只要是并口读写数据 源码例程!



大家好,小弟在最近在做xintf外接usb芯片这个东西,硬件也配置完成了,xintf模块的相关寄存器也都配置了,检查了一遍又一遍,可我怎么就是写不进去数据啊,测试的数据线电位都为高电平,已经没办法了,卡了一个星期了,求各位了解的过来指导一下啊,或者有源码也行,给我看一眼,参照一下。谢谢大家了!