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關於ADAU1452 Mid Filter 演算法

CKC 在 2014-9-24 詢問的問題
最後回覆由j.mo於2014-9-25提供

各位好!!我們再用外部CPU去控制ADAU1452中目前遇到;我們開啟32組mid filter調整,我們測其中一組值例如將設定的1KHz將Boost得值從0調整到2從SigmaStudio工具所產生的xml檔案去比對發現

//Type[ 0 ];Gain[ 0 ],Q[ 1.41 ],Boost[ 2 ],Frequency[ 1000 ],PhaseShifted[ False ],Type[ 0 ]

                </ModuleParameter>
                <ModuleParameter>
                    <Name>EQS300Multi2B2_2</Name>
                    <Type>Int32</Type>
                    <Address>32876</Address>
                    <Value>0.910505890846252</Value>
                    <Size>4</Size>
                    <Data>0x00, 0xE9, 0x16, 0xEA, </Data>
                </ModuleParameter>
                <ModuleParameter>
                    <Name>EQS300Multi2B1_2</Name>
                    <Type>Int32</Type>
                    <Address>32877</Address>
                    <Value> -1.90433156490326</Value>
                    <Size>4</Size>
                    <Data>0xFE, 0x18, 0x7D, 0xBA, </Data>
                </ModuleParameter>
                <ModuleParameter>
                    <Name>EQS300Multi2B0_2</Name>
                    <Type>Int32</Type>
                    <Address>32878</Address>
                    <Value>1.01025807857513</Value>
                    <Size>4</Size>
                    <Data>0x01, 0x02, 0xA0, 0x46, </Data>
                </ModuleParameter>
                <ModuleParameter>
                    <Name>EQS300Multi2A2_2</Name>
                    <Type>Int32</Type>
                    <Address>32879</Address>
                    <Value> -0.920763969421387</Value>
                    <Size>4</Size>
                    <Data>0xFF, 0x14, 0x48, 0xD0, </Data>
                </ModuleParameter>
                <ModuleParameter>
                    <Name>EQS300Multi2A1_2</Name>
                    <Type>Int32</Type>
                    <Address>32880</Address>
                    <Value>1.90433156490326</Value>
                    <Size>4</Size>
                    <Data>0x01, 0xE7, 0x82, 0x46, </Data>
                </ModuleParameter>

 

會有5組浮點(8.24)的變數變更.如果我們想用其他軟體來處理Mid Filter調整後的產生這5組浮點值是否有相對應的公式來轉換?謝謝!!

 

CKC.

結果