FPGA 中的警告：Warning: Some pins have incomplete I/O assignments （Missing drive strength and slew rate）最近在FPGA程序全綜合時碰到了個奇怪的問題：Warning: Some pins have incomplete I/O assignments. Refer to the I/O Assignment Warnings report for details查看了compilation report-> I/O Assignment Warnings 提示是 輸出管腳“ Missing drive strength and slew rate”。記得用過CycloneII芯片就不會出現(xiàn)這種警告，google了下，是因為后續(xù)高級的芯片的 drive strength 和 slew rate 都是可編程的。如果不指定的話，quartus會給出默認值并給出警告。消除警告的辦法是在pin planner 分配管腳時同時制定這兩個值。設(shè)置方法如下：In the pin planner in the pin list there's a column called Current Strength.
If it doesn't show up there, right-click your mouse in the pin list and 網(wǎng)址：http://www./forum/showthread.php?t=24347 |
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來自： 林緣232 > 《各種warning》
