Microchip’s ANSI C compiler provides full floating point math capability, enabling both the single and double precision floating point operations found in any standard ANSI C compiler. These include functions such as sin, cos, tan, and other common mathematical operations.
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Description
The standard ANSI C floating point library is part of the MPLAB compiler and is documented in the 16-bit Language Tools document. The library works with both the PIC24 and dsPIC families.
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Features
• Free library included with MPLAB compiler
• Compatible with the Microchip PIC24and dsPIC families
• Full compatibility with standard ANSI C floating point math libraries.
• Support for double or single precision floating point
• Includes common operations such as sin, cos, tan, etc.
Devices Supported
All processors in the PIC24and dsPIC DSC family
Getting Started
• Download and install MPLAB and the free trial version of the C compiler
• See Chapter 3 of the 16-bit Language Tools for complete documentation of the Floating Point Math Library
• Start writing floating point code!
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Common Floating Point Math Functions
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Function
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Description
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sin/sinf*
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Sin of a double/single precision floating point variable
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cos/cosf*
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Cos of a double/single precision floating point variable
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tan/tanf*
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Tan of a double/single precision floating point variable
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exp/expf*
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Calculates the exponential function of a double/single precision floating point variable
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fabs/fabsf*
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Calculates the absolute value of a double/single precision floating point variable
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fmod/fmodf*
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Calculates the remainder of x/y as a double/single precision floating point value
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log/logf*
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Calculates the log of a double/single precision variable
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sqrt/sqrtf*
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Calculates the square root of a double/single precision variable
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pow/powf*
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Calculates x raised to the power of y
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floor/floorf*
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Calculates the floor of a double/single precision floating point variable
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ceil/ceilf*
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Calculates the ceiling of a double/single precision floating point variable
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asin/asinf*
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Arc sin of a double/single precision floating point variable
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acos/acosf*
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Arc cos of a double/single precision floating point variable
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atan/atanf*
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Arc tan of a double/single precision floating point variable
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*- “f” denotes single precision floating point number
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A complete list of floating point math functions is available in the16-Bit Language Tools document
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