PropWare
3.0.0.229
C++ objects and CMake build system for Parallax Propeller
Simple-Libraries
Propeller GCC Demos
toggle
c++_toggle
toggle.cc
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/*
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This shows an example for creating an LMM program and Makefile.
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It simply toggles the pins at 1Hz rate.
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Copyright (c) 2011 Parallax, Inc.
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MIT Licensed.
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+--------------------------------------------------------------------
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| TERMS OF USE: MIT License
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+--------------------------------------------------------------------
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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+--------------------------------------------------------------------
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*/
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#include "propeller.h"
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// this is a bit more elaborate than required, but
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// it shows usage of a basic C++ class
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class
pinset
{
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private
:
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// these variables are not accessible outside the class
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unsigned
int
mask;
// which pins are in this set
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unsigned
int
freq;
// the frequency at which to toggle them
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public
:
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// here are the public variables and methods
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// the basic constructor
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pinset
(
unsigned
int
m,
unsigned
int
f) {
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mask = m;
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freq = f;
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DIRA
|= m;
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}
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// the run loop
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void
run(
void
) {
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for
(;;) {
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OUTA
^= mask;
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waitcnt
(freq+
CNT
);
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}
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}
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};
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int
main
(
void
)
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{
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// create a set of pins to toggle at 2Hz
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pinset
allpins(0x3fffffff,
CLKFREQ
>>1);
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// now go and toggle them, forever
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allpins.run();
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}
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OUTA
#define OUTA
Use to set output pin states when corresponding DIRA bits are 1.
Definition:
propeller1.h:157
main
int main(void)
Definition:
GraphicsTest.c:20
CLKFREQ
#define CLKFREQ
Returns the current clock frequency.
Definition:
propeller.h:46
waitcnt
#define waitcnt(a)
Wait until system counter reaches a value.
Definition:
propeller.h:176
CNT
#define CNT
The system clock count.
Definition:
propeller1.h:151
pinset
Definition:
toggle.cc:36
DIRA
#define DIRA
Use to set pins to input (0) or output (1).
Definition:
propeller1.h:161
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