The FP_TRIG library is written by Josef Franz Vögel.

 

All trig functions are stored in fp_trig.lib library.

The fp_trig.lbx contains the compiled object code and is used by BASCOM.

 

This sample demonstrates all the functions from the library:

 

 

'-----------------------------------------------------------------------------------------

'name                     : test_fptrig2.bas

'copyright                : (c) 1995-2025, MCS Electronics

'purpose                  : demonstates FP trig library from Josef Franz Vögel

'micro                    : Mega8515

'suited for demo          : no

'commercial addon needed  : no

'-----------------------------------------------------------------------------------------

 

$regfile = "m8515.dat"                                     ' specify the used micro

$crystal = 4000000                                         ' used crystal frequency

$baud = 19200                                               ' use baud rate

$hwstack = 32                                               ' default use 32 for the hardware stack

$swstack = 10                                               ' default use 10 for the SW stack

$framesize = 40                                             ' default use 40 for the frame space

 

 

Dim S1 As Single , S2 As Single , S3 As Single , S4 As Single , S5 As Single , S6 As Single

Dim Vcos As Single , Vsin As Single , Vtan As Single , Vatan As Single , S7 As Single

Dim Wi As Single , B1 As Byte

Dim Ms1 As Single

 

 

 

Const Pi = 3.14159265358979

 

'calculate PI

Ms1 = Atn(1) * 4

 

 

Testing_power:

Print "Testing Power X ^ Y"

Print "X             Y          x^Y"

For S1 = 0.25 To 14 Step 0.25

 S2 = S1 \ 2

 S3 = Power(s1 , S2)

Print S1 ; " ^ " ; S2 ; " = " ; S3

Next

Print : Print : Print

 

Testing_exp_log:

 

Print "Testing EXP and LOG"

Print "x    exp(x)       log([exp(x)])    Error-abs    Error-rel"

Print "Error is for calculating exp and back with log together"

For S1 = -88 To 88

 S2 = Exp(s1)

 S3 = Log(s2)

 S4 = S3 - S1

 S5 = S4 \ S1

Print S1 ; "    " ; S2 ; "    " ; S3 ; "    " ; S4 ; "    " ; S5 ; " " ;

Print

Next

Print : Print : Print

 

 

Testing_trig:

Print "Testing COS, SIN and TAN"

Print "Angle Degree   Angle Radiant         Cos         Sin         Tan"

For Wi = -48 To 48

 S1 = Wi * 15

 S2 = Deg2rad(s1)

 Vcos = Cos(s2)

 Vsin = Sin(s2)

 Vtan = Tan(s2)

Print S1 ; "    " ; S2 ; "   " ; Vcos ; "   " ; Vsin ; "   " ; Vtan

Next

Print : Print : Print

 

 

Testing_atan:

Print "Testing Arctan"

Print "X    atan in Radiant,    Degree"

S1 = 1 / 1024

Do

 S2 = Atn(s1)

 S3 = Rad2deg(s2)

Print S1 ; "     " ; S2 ; "     " ; S3

 S1 = S1 * 2

If S1 > 1000000 Then

    Exit Do

End If

Loop

 

Print : Print : Print

 

Testing_int_fract:

Print "Testing Int und Fract of Single"

Print "Value     Int       Frac"

S2 = Pi \ 10

For S1 = 1 To 8

 S3 = Int(s2)

 S4 = Frac(s2)

Print S2 ; "   " ; S3 ; "   " ; S4

 S2 = S2 * 10

Next

 

Print : Print : Print

 

Print "Testing degree - radiant - degree converting"

Print "Degree   Radiant   Degree   Diff-abs   rel"

 

For S1 = 0 To 90

S2 = Deg2rad(s1)

S3 = Rad2deg(s2)

S4 = S3 - S1

S5 = S4 \ S1

Print S1 ; "   " ; S2 ; "   " ; S3 ; "   " ; S4 ; "   " ; S5

Next

 

Testing_hyperbolicus:

Print : Print : Print

Print "Testing SINH, COSH and TANH"

Print "X        sinh(x)         cosh(x)       tanh(x)"

For S1 = -20 To 20

S3 = Sinh(s1)

S2 = Cosh(s1)

S4 = Tanh(s1)

Print S1 ; "   " ; S3 ; "   " ; S2 ; "   " ; S4

Next

Print : Print : Print

 

Testing_log10:

Print "Testing LOG10"

Print "X        log10(x)"

S1 = 0.01

S2 = Log10(s1)

Print S1 ; "   " ; S2

S1 = 0.1

S2 = Log10(s1)

Print S1 ; "   " ; S2

For S1 = 1 To 100

S2 = Log10(s1)

Print S1 ; "   " ; S2

Next

 

Print : Print : Print

 

 

'test MOD on FP

S1 = 10000

S2 = 3

S3 = S1 Mod S2

Print S3

 

Print "Testing_SQR-Single"

For S1 = -1 To 4 Step 0.0625

 S2 = Sqr(s1)

Print S1 ; " " ; S2

Next

Print

For S1 = 1000000 To 1000100

 S2 = Sqr(s1)

Print S1 ; " " ; S2

Next

 

Testing_atn2:

Print "Testing Sin / Cos / ATN2 / Deg2Rad / Rad2Deg / Round"

Print "X[deg]     X[Rad]      Sin(x)      Cos(x)      Atn2     Deg of Atn2    Rounded"

For S1 = -180 To 180 Step 5

 S2 = Deg2rad(s1)

 S3 = Sin(s2)

 S4 = Cos(s2)

 S5 = Atn2(s3 , S4)

 S6 = Rad2deg(s5)

 S7 = Round(s6)

Print S1 ; " " ; S2 ; " " ; S3 ; " " ; S4 ; " " ; S5 ; " " ; S6 ; " " ; S7

Next

Print "note: -180° is equivalent to +180°"

Print

Testing_asin_acos:

Print "Testing ASIN, ACOS"

Print "X       asin(x)        acos(x)"

For S1 = -1.125 To 1.125 Step 0.0625

 S2 = Asin(s1)

 S3 = Acos(s1)

Print S1 ; " " ; S2 ; " " ; S3

Next

Print "Note: > 1.0 and < -1.0 are invalid and shown here for error handling"

 

 

Testing_shift:

S1 = 12

For B1 = 1 To 20

 S2 = S1 : S3 = S1

Shift S2 , Left , B1

Shift S3 , Right , B1

Print S1 ; " " ; S2 ; " " ; S3

Next

 

Print "End of testing"

 

End