Program Compiles, but does not load

[sigurdk 0]

I am trying to port an arduino project to energia.

 

I use the pow( base, exponent) function in calculations to compute Standing Wave Ratio (SWR).

 

I have a function swr that is called from loop.  Works fine on arduino, but on energia I get the following load output:   (notice "ld returned 1 exit status")

 

\energia-0101E0014\hardware\tools\msp430\bin\msp430-gcc, -Os, -Wl,-gc-sections,-u,main, -mmcu=msp430f5529, -o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\LCD_Sharp_v3.cpp.elf, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\LCD_Sharp_v3.cpp.o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\SPI\SPI.cpp.o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\SPI\utility\eusci_spi.cpp.o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\SPI\utility\usci_spi.cpp.o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\SPI\utility\usi_spi.cpp.o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\LCD_SharpBoosterPack_SPI\LCD_SharpBoosterPack_SPI.cpp.o, C:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp\core.a, -LC:\DOCUME~1\sigurd\LOCALS~1\Temp\build5374206321071163191.tmp, -lm]

LCD_Sharp_v3.cpp.o: In function `swr(int, int)':

LCD_Sharp_v3.cpp:(.text._Z3swrii+0x5a): undefined reference to `pow'

collect2: ld returned 1 exit status

 

I copied the same code to "setup" and it runs fine there.

 

Any suggestions?

 

Thank you,   Sigurd KJ1k

LCD_Sharp_v3.ino

[roadrunner84 466]

pow() is part of the math library, I assume you #include <math.h>, but you'll also need to link to the math library itself, using the linker parameter -lm. I am not sure how to do this in Energia, but you'll probably end up with a binary that is way too large for your purposes. An alternative is to write your own pow() function...

[spirilis 1,265]

Try powf()

 

Sent from my Galaxy Note II with Tapatalk 4

[sigurdk 0]

I tried Try powf(), as suggested and that solved my problem!

 

Thank you very much    

 

KJ1K, Sigurd