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Simple Libraries
Utility
libsimpletools
source
getDirections.c
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/*
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* @file getstates.c
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*
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* @author Andy Lindsay
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*
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* @version 0.85
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*
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* @copyright Copyright (C) Parallax, Inc. 2012. See end of file for
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* terms of use (MIT License).
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*
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* @brief getStates function source, see simpletools.h for documentation.
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*
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* @detail Please submit bug reports, suggestions, and improvements to
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* this code to editor@parallax.com.
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*/
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#include "
simpletools.h
"
// simpletools function prototypes
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unsigned
int
get_directions
(
int
endPin,
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int
startPin)
// getStates function definition
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{
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unsigned
int
pattern =
DIRA
;
// Copy INA
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if
(endPin < startPin)
// Handle reverse pin size
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{
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int
temp = startPin;
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startPin = endPin;
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endPin = temp;
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}
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pattern <<= (31 - endPin);
// Remove zeros to left
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pattern >>= (31 - endPin + startPin);
// Right justify & return
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return
pattern ;
// Right justify & return
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}
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simpletools.h
This library provides convenient functions for a variety of microcontroller I/O, timing,...
get_directions
unsigned int get_directions(int endPin, int startPin)
Get directions for a contiguous group of I/O pins.
Definition:
getDirections.c:19
DIRA
#define DIRA
Use to set pins to input (0) or output (1).
Definition:
propeller1.h:161
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