Embedded Software and Motor Control Libraries for PXR40xx

Function GFLIB_Lut2D_F16
where:
Equation GFLIB_Lut2D_Eq1
Equation GFLIB_Lut2D_Eq2
Equation GFLIB_Lut2D_Eq3
• f[x,y] is the interpolated value
• f[x,y 1] and f[x,y 2] are the ordinate values at, respectively, the beginning and the end
of the final interpolating interval
• x 1, x 2, y 1 and y 2 are the area values, respectively, the interpolated area
• the x, y are the input values provided to the function in the f16In1 and f16In2
arguments
The interpolating intervals are defined in the table provided by the pf16Table member of
the parameters structure. The table contains ordinate values consecutively over the whole
interpolating range. The abscissa values are assumed to be defined implicitly by a single
interpolating interval length and a table index while the interpolating index zero is the
table element pointed to by the pf16Table parameter. The abscissa value is equal to the
multiplication of the interpolating index and the interpolating interval length. For
example let's consider the following interpolating table:
Table 4-92. GFLIB_Lut2D example table
ordinate (f[x,y]) interpolating index abscissa (x) abscissa (y)
-0.5 -1 -1*(2 -1 ) -1*(2 -1 )
pf16Table 0.0 0 0*(2 -1 ) 0*(2 -1 )
0.5 1 1*(2 -1 ) 1*(2 -1 )
1.0 N/A 2*(2 -1 ) 2*(2 -1 )
Embedded Software and Motor Control Libraries for PXR40xx, Rev. 1.0
376 Freescale Semiconductor, Inc.