初學CPLD,編個接收1553B數據的小程序。前面綜合,翻譯都通過了,就是到映射過不去,編譯的結果總是報同樣的錯誤,如下:Mapping a total of 236 equation into 16 function blocks
Error:CPLD:892 Cannot place signal init_reg<1>.Consider reducing the collapsing input limit or the product term limit to prevent the fitter from creating high input and / or high product term functions.
CPLD:868 Cannot fit the design into any of the soecified devices with the selected implementation options.