eGUI alias D4D  Release 3.0
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Functions
D4D MATH API Functions Specification
D4D MATH functionality
Collaboration diagram for D4D MATH API Functions Specification:

Functions

Byte D4D_MulDivUU8 (Byte u1, Byte u2, Byte d)
 Simple proportion unsigned calculation - 8 bit. More...
 
sByte D4D_MulDivSU8 (sByte s, Byte u, Byte d)
 Simple proportion signed calculation - 8 bit. More...
 
Word D4D_MulDivUU16 (Word u1, Word u2, Word d)
 Simple proportion unsigned calculation - 16 bit. More...
 
sWord D4D_MulDivSU16 (sWord s, Word u, Word d)
 Simple proportion signed calculation - 8 bit. More...
 
Byte D4D_Abs (sByte num)
 Calculation of absolute value - 8 bit. More...
 
Word D4D_Abs16 (sWord num)
 Calculation of absolute value - 16 bit. More...
 
LWord D4D_Abs32 (sLWord num)
 Calculation of absolute value - 32 bit. More...
 
Word D4D_LimitU16 (Word val, Word min, Word max)
 Calculation of limitation value (unsigned) - 16 bit. More...
 
sWord D4D_LimitS16 (sWord val, sWord min, sWord max)
 Calculation of limitation value (signed) - 16 bit. More...
 
Byte D4D_LimitU8 (Byte val, Byte min, Byte max)
 Calculation of limitation value (unsigned) - 8 bit. More...
 
sByte D4D_LimitS8 (sByte val, sByte min, sByte max)
 Calculation of limitation value (signed) - 8 bit. More...
 
sByte D4D_Sin (Byte x)
 Sine calculation using lookup table. More...
 
sByte D4D_Cos (Byte x)
 Cosine calculation using lookup table. More...
 

Detailed Description

This section specifies the exact usage for each API function.

Function Documentation

Byte D4D_Abs ( sByte  num)

Calculation of absolute value - 8 bit.

Parameters
numas signed integer <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F>

This function calculates the absolute value (unsigned) of argument num(signed)

Returns
unsigned absolute value <0..0x80> ~ <0..128>

Definition at line 306 of file d4d_math.c.

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Word D4D_Abs16 ( sWord  num)

Calculation of absolute value - 16 bit.

Parameters
numas signed integer <-32768..-1,0..32767> ~ <0xFFFF..0x8000,0x00..0x7FFF>

This function calculates the absolute value (unsigned) of argument num(signed)

Returns
unsigned absolute value <0..0x8000> ~ <0..32768>

Definition at line 325 of file d4d_math.c.

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LWord D4D_Abs32 ( sLWord  num)

Calculation of absolute value - 32 bit.

Parameters
numas signed integer <-2,147,483,648..-1,0..2,147,483,647> ~ <0xFFFFFFFF..0x80000000,0x00000000..0x7FFFFFFF>

This function calculates the absolute value (unsigned) of argument num(signed)

Returns
unsigned absolute value <0..0x80000000> ~ <0..2,147,483,648>

Definition at line 344 of file d4d_math.c.

sByte D4D_Cos ( Byte  x)

Cosine calculation using lookup table.

Parameters
xas unsigned integer <0..0xFF> ~ <0..2PI)

This function calculates the cosine value of argument phase 64 x 8 bit look-up table.

Returns
signed cosine value <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F> ~ <-1,+1>

Definition at line 502 of file d4d_math.c.

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sWord D4D_LimitS16 ( sWord  val,
sWord  min,
sWord  max 
)

Calculation of limitation value (signed) - 16 bit.

Parameters
valas signed integer <-32768..-1,0..32767> ~ <0xFFFF..0x8000,0x00..0x7FFF> - value that will be limited
minas signed integer <-32768..-1,0..32767> ~ <0xFFFF..0x8000,0x00..0x7FFF> - minimal limitation value
maxas signed integer <-32768..-1,0..32767> ~ <0xFFFF..0x8000,0x00..0x7FFF> - maximal limitation value

This function calculates the limitation of value by input value borders

Returns
signed limited value <min..max>

Definition at line 394 of file d4d_math.c.

sByte D4D_LimitS8 ( sByte  val,
sByte  min,
sByte  max 
)

Calculation of limitation value (signed) - 8 bit.

Parameters
valas signed integer <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F> - value that will be limited
minas signed integer <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F> - minimal limitation value
maxas signed integer <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F> - maximal limitation value

This function calculates the limitation of value by input value borders

Returns
signed limited value <min..max>

Definition at line 448 of file d4d_math.c.

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Word D4D_LimitU16 ( Word  val,
Word  min,
Word  max 
)

Calculation of limitation value (unsigned) - 16 bit.

Parameters
valas unsigned integer <0..0xFFFF> ~ <0..65535> - value that will be limited
minas unsigned integer <0..0xFFFF> ~ <0..65535> - minimal limitation value
maxas unsigned integer <0..0xFFFF> ~ <0..65535> - maximal limitation value

This function calculates the limitation of value by input value borders

Returns
unsigned limited value <min..max>

Definition at line 367 of file d4d_math.c.

Byte D4D_LimitU8 ( Byte  val,
Byte  min,
Byte  max 
)

Calculation of limitation value (unsigned) - 8 bit.

Parameters
valas unsigned integer <0..0xFF> ~ <0..255> - value that will be limited
minas unsigned integer <0..0xFF> ~ <0..255> - minimal limitation value
maxas unsigned integer <0..0xFF> ~ <0..255> - maximal limitation value

This function calculates the limitation of value by input value borders

Returns
unsigned limited value <min..max>

Definition at line 421 of file d4d_math.c.

sWord D4D_MulDivSU16 ( sWord  s,
Word  u,
Word  d 
)

Simple proportion signed calculation - 8 bit.

Parameters
sas signed integer <-32768..-1,0..32767> ~ <0xFFFF..0x8000,0x00..0x7FFF>
uas unsigned integer <0..0xFFFF> ~ <0..65535>
d(divider) as unsigned integer <0..0xFFFF> ~ <0..65535>

This function calculates the simple proportion value of arguments (s*u) / d

Returns
unsigned simple proportion value <-32768..-1,0..32767> ~ <0xFFFF..0x8000,0x00..0x7FFF>

Definition at line 276 of file d4d_math.c.

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sByte D4D_MulDivSU8 ( sByte  s,
Byte  u,
Byte  d 
)

Simple proportion signed calculation - 8 bit.

Parameters
sas signed integer <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F>
uas unsigned integer <0..0xFF> ~ <0..255>
d(divider) as unsigned integer <0..0xFF> ~ <0..255>

This function calculates the simple proportion value of arguments (s*u) / d

Returns
unsigned simple proportion value <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F>

Definition at line 225 of file d4d_math.c.

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Word D4D_MulDivUU16 ( Word  u1,
Word  u2,
Word  d 
)

Simple proportion unsigned calculation - 16 bit.

Parameters
u1as unsigned integer <0..0xFFFF> ~ <0..65535>
u2as unsigned integer <0..0xFFFF> ~ <0..65535>
d(divider) as unsigned integer <0..0xFFFF> ~ <0..65535>

This function calculates the simple proportion value of arguments (u1*u2) / d

Returns
unsigned simple proportion value <0..0xFFFF> ~ <0..65535>

Definition at line 257 of file d4d_math.c.

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Byte D4D_MulDivUU8 ( Byte  u1,
Byte  u2,
Byte  d 
)

Simple proportion unsigned calculation - 8 bit.

Parameters
u1as unsigned integer <0..0xFF> ~ <0..255>
u2as unsigned integer <0..0xFF> ~ <0..255>
d(divider) as unsigned integer <0..0xFF> ~ <0..255>

This function calculates the simple proportion value of arguments (u1*u2) / d

Returns
unsigned simple proportion value <0..255> ~ <0x0..0xFF>

Definition at line 206 of file d4d_math.c.

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sByte D4D_Sin ( Byte  x)

Sine calculation using lookup table.

Parameters
xas unsigned integer <0..0xFF> ~ <0..2PI)

This function calculates the sine value of argument phase 64 x 8 bit look-up table.

Returns
signed sine value <-128..-1,0..127> ~ <0xFF..0x80,0x00..0x7F> ~ <-1,+1>

Definition at line 472 of file d4d_math.c.

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