对于nCEO/IO口而言作为IO口是需进行设定才能编译通过,否则出现错误
Error:Can't place multiple pin sassigned top in location Pin_76(IOC_X28_Y2_N0)
解决办法:1设定Assignment-->DEVICE-->DEVICE&PinOptions...-->Configuration-->Configurationscheme:PasiveSerial(canuseConfigurationDEVICE).
2、将管脚设为普通管脚Assignment-->DEVICE-->DEVICE&PinOptions...-->dual-purposepin中把nCEO改成asregularI/O；
此时编译该引脚则能顺利通过,且作为普通IO口使用!