at the end of every software development phase, such as srs and lld, we should re-estimate our software size and adjust our project plan 在每一個軟件開發(fā)階段的結束,正如srs和lld,我們可以重新評估軟件的規(guī)模并調整我們的項目計劃。
at the end of every software development phase, such as srs and lld [ / b ], we should re-estimate our software size and adjust our project plan 在每一個軟件開發(fā)階段的結束,正如srs和lld,我們可以重新評估軟件的規(guī)模并調整我們的項目計劃。
this method is especially simple and easy to implement . furthermore, it fully capable of tracking digital control signals carried by 4 ~ 20ma analog signals; during software development phase, we have completed signal collecting, lcd displaying, d / a converting of hart signal and ieee-754 32 bit float point conversion . we used a simplified method in ieee-754 32 bit compatible float point conversion based on the 24 bit integer and 16 bit decimal computation 在hart信號的解調外圍電路中采用遲滯比較電路實現(xiàn)波形的轉化,這種方法簡單、易實現(xiàn),完全能夠跟蹤加載在420ma模擬信號上的數(shù)字控制信號;在軟件設計中,完成了hart信號的采集編程、lcd顯示編程、da轉化控制編程和ieee-75432位浮點數(shù)的轉化編程,ieee-75432位浮點數(shù)轉化編程采用的是在最多滿足24位整數(shù)位和16位小數(shù)位的基礎上的一種簡化算法。