SW006013 Microchip Technology, SW006013 Datasheet - Page 218
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SW006013
Manufacturer Part Number
SW006013
Description
MPLAB C Compiler For DsPIC DSCs
Manufacturer
Microchip Technology
Series
DsPIC30F/33Fr
Type
MPLAB® C Compilerr
Datasheet
1.SW006014.pdf
(246 pages)
Specifications of SW006013
Supported Families
DsPIC30F, DsPIC33F
Core Architecture
DsPIC
Kit Contents
Software And Docs
Mcu Supported Families
DsPIC30F And DsPIC33F
Tool Function
Compiler
Tool Type
Compiler
Processor Series
dsPIC
Lead Free Status / RoHS Status
na
For Use With/related Products
dSPIC DSCs
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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DS51456E-page 214
_Q15neg
Description:
Include:
Prototype:
Argument:
Return Value:
_Q15norm
Description:
Include:
Prototype:
Argument:
Return Value:
_Q15power
Description:
Include:
Prototype:
Argument:
Return Value:
_Q15random
Description:
Include:
Prototype:
Argument:
Return Value:
This function negates a Q15 value with saturation. The value is
saturated in the case where the input is -32768.
<libq.h>
_Q15 _Q15neg(_Q15 x);
x
2
This function returns -x in Q15 format. This value ranges from -32768
to 32767.
This function finds the normalized value of a Q15 value.
<libq.h>
_Q15 _Q15norm(_Q15 x);
x
2
This function returns the square root of x in Q15 format. This value
ranges from 16384 to -32767 for a positive number and -32768 to
-16384 for a negative number.
This function finds the power result, given the base value and the
power value in Q15 format.
<libq.h>
_Q15 _Q15power(_Q15 x, _Q15 y);
x
The value of this argument ranges from 1 to 32767.
y
The value of this argument ranges from 1 to 32767.
This function returns x to the power of y in Q15 format. This value
ranges from 1 to 32767.
This function generates a random number in the range from -32768 to
32767. The random number generation is periodic with period 65536.
This function uses the _Q15randomSeed variable as a random seed
value.
<libq.h>
_Q15 _Q15random(void);
None.
This function returns a random number in Q15 format. This value
ranges from -32768 to 32767.
15
15
-1. The value of this argument ranges from -32768 to 32767.
-1. The value of this argument ranges from -32768 to 32767.
a fixed point number in Q15 format, which ranges from -2
a fixed point number in Q15 format, which ranges from -2
a fixed point number in Q15 format, which ranges from 1 to 2
a fixed point number in Q15 format, which ranges from 1 to 2
© 2008 Microchip Technology Inc.
15
15
to
to
15
15
-1.
-1.
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