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--- resources:tools-software:sigmastudio:toolbox:basicdsp:log2 [21 Jul 2016 07:30]
Venkatesan Krishnamoorthy [Log2]
+++ resources:tools-software:sigmastudio:toolbox:basicdsp:log2 [21 Aug 2018 11:53]
Deepak Raghotham
@@ Line 2: / Line 2: @@
 [[:resources:tools-software:sigmastudio:toolbox:basicdsp|Click here to return to the Basic DSP section.]]\\
 \\
+This module computes the log to base 2 of the incoming data.
-There are 2 versions of Log2 module.
+There are 2 versions of Log2 module on ADAU144x processors.
   - Log2 (Linear Interpolation)
   - Log2 Accurate (Binary Algorithm)
+ADAU145x, ADSP-214xx and ADSP-SC5xx/215xx processors support a single version of the Log2 implementation.
 {{ :resources:tools-software:sigmastudio:toolbox:basicdsp:log2.jpg?nolink |}}
 ===== Log2 (Linear Interpolation) =====
@@ Line 43: / Line 45: @@
 {{ :resources:tools-software:sigmastudio:toolbox:basicdsp:log10_2.jpg?nolink |}}
+===== Log2 on ADSP-213xx, ADSP-214xx, ADSP-215xx and ADSP-SC5xx processors  =====
+====Input Pins====
+^Name^Format [int/dec] - [control/audio]^Function Description^
+|Pin 0: Input  Data|decimal(ADAU145x) - audio \\ float(ADSP-214xx/ADSP-215xx) - audio|Input data to be converted to Log base 2|
+====Output Pins====
+^Name^Format [int/dec] - [control/audio]^Function Description^
+|Pin 0: Log value|decimal(ADAU145x) - control \\ float(ADSP-214xx/ADSP-215xx) - control |log2(input)|
+==== Grow Algorithm ====
+The module supports Add functionality. Growth is not supported.
+==== GUI Controls====
+None
+==== DSP Parameter Information ====
+None
+==== Algorithm Description ====
+log2(x) is implemented as (ln(x) / ln(2)) using the change of base formula.
+ln(x) is implemented using the taylor series expansion.
+==== Supported IC's ====
+. ADSP-213xx \\
+. ADSP-214xx \\
+. ADSP-SC5xx \\
+. ADSP-215xx

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