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TMS320F28069M: Why CLA MATH log function is not correct？

Chen Yao
Prodigy 160 points
Part Number: TMS320F28069M


Hi all, 

When I use CLA Math lib function (Natural Log, base 10 Log, base N Log), the calculated result is a very big number? But other functions in the CLA Math lib is correct. 

lnValue = CLAln(2.718282);
logValue = CLAlog10(100.0);
log10Value = CLAlogN(100.0,10.0);

The results are:

Is there any misunderstanding when I use Log function? 

Please share me some tips. Thank you!

  • 0
    TI__Mastermind 32995 points
    Hi,

    Can you check the CLAln() and CLAln_inline() functions in the CLA Math library examples? The example tests both functions. Please let me know if you are seeing similar issues.

    Where are you string the lnValue? Make sure it is is on a 32-bit boundary and accessible by the CLA.

    sal