Subject:
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Re: legOS codeI need example code of rcx2rcx communication.
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Tue, 30 Oct 2001 21:39:30 GMT
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Viewed:
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1623 times
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In lugnet.robotics.rcx.legos, Chris Daniel writes:
> Albert, Thanks for responding to my post! I had trouble compileing the code
> maybe you could help or e-mail me the original.Thanks here is the error report:
> brick1.c: In function `read_from_ir':
> brick1.c:40: warning: passing arg 1 of `memcpy' di
> rget type
> brick1.c: In function `main':
> brick1.c:56: `data' undeclared (first use in this
> brick1.c:56: (Each undeclared identifier is report
> brick1.c:56: for each function it appears in.)
> brick1.c:49: warning: unused variable `i'
> brick1.c:48: warning: unused variable `buf'
> make: *** [brick1.o] Error 1
Chris,
First, I think the code in the main function should be as follows:
int main( int argc, char* argv[] )
{
char buf[256];
int len; //notice the variable i is missing
lnp_address_set_handler( 1, port_handler );
while(1) {
len = read_from_if( buf ); //notic variable buf is used instead of data
if (buf[0] == '!') {
dsound_play( notes_short );
}
}
}
Second, the argument for the read_from_ir( ) function needs to be:
int read_from_ir( unsigned char* data); //notices not const anymore
This change will allow the memcpy to work correctly.
HTH,
Bill
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