Subject:
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Possible bug? Simple light sensor condition checking.
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 16 Jul 2007 15:13:17 GMT
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Viewed:
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16248 times
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I tried my own skill on writing a program for the included lego test pad (RIS
2.0), and I discovered something weird. The following code does set the
conditions right, but the following code doesn't set the conditions right if I
comment out the 'cputs("");'. Any idea why?
int offonpad =0;
int check_off_pad(int argc, char *argv[]) {
while(!shutdown_requested()) {
if(LIGHT(LIGHTSENS) < 40) {
offonpad = 1;
}
else {
offonpad = 0;
}
cputs("");
}
return 0;
}
What doesn't work is (it fails to set the varible, if i initialize offonpad as
1, its always one. If i initialize offonpad as 0, it is always zero.):
int check_off_pad(int argc, char *argv[]) {
while(!shutdown_requested()) {
if(LIGHT(LIGHTSENS) < 40) {
offonpad = 1;
}
else {
offonpad = 0;
}
//cputs("");
}
return 0;
}
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