Logarithm and exponential function

j3lda · ‎2015-03-09

Posted on March 09, 2015 at 10:02

Hello, I am using STM32F3 Discovery kit. I need to calculate logarithms and exponential function (e^x). I cant find these functions anywhere. Are they in any libraries from ST?

Thank you for answers

AvaTar · ‎2015-03-09

Posted on March 09, 2015 at 12:16

Are they in any libraries from ST?

No.

There is nothing ST - specific in, just core and FPU functionality.

Your toolchain should provide a math library libm.a, implementing most of the ANSI/POSIX math functionality. Just include math.h, and link against libm.a ('-lm').

Hint: you might want to avoid the (standard) double functions, and use the float versions (like logf() and expf()) instead.

Tesla DeLorean · ‎2015-03-09

Posted on March 09, 2015 at 21:17

Is there any intrinsic FPU support for trigonometry or transcendental functions?

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