Quartus 生成pof的設置
在assignments -- device -- device and pin option, 在configuration 選項卡當中，要勾上Use Configuration device，並選擇好配置芯片。
選擇configuration scheme爲Active Serial
Error: Can't place pins assigned to pin location Pin錯誤解決
在Quartus編譯過程中如果出現如下錯誤信息
Error: Can't place pins assigned to pin location Pin_E18 (IOPAD_X53_Y21_N14)
Info: Pin in_port_to_the_pio_button[6] is assigned to pin location Pin_E18 (IOPAD_X53_Y21_N14)
Info: Pin ~ALTERA_nCEO~ is assigned to pin location Pin_E18 (IOPAD_X53_Y21_N14)
是因爲管腳複用導致的，按照如下設置可解決：
在QII中的Assignments----Device----Device and pin option-----(選項卡)Dual purpose pin
將nCE0的設置改爲：use as regular IO
