Subject:
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Re: RCX to RCX communication
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 15 Jul 2002 01:48:15 GMT
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Viewed:
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2687 times
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"Luke Ma" <Luke_Ma@brown.edu> wrote in message news:Gz83nF.7D9@lugnet.com...
> In lugnet.robotics.rcx.legos, Mark Sackett writes:
> > I have studied the sources on the WEB for LNP but have not found any
> > examples of C or C++ code for RCX to RCX communication. I have two RCXs • and
> > would like to build something that takes advantage of 6 inputs and 6 • outputs.
> >
> > Do you have a sample you would be willing to share?
> >
> > Thanks,
> > Mark
>
> Mark,
> I was a TA(Teaching Assistant) for a course at Brown University that
> invovled building robots with the mindstorms kit. Go to the web site:
> http://www.cs.brown.edu/courses/cs148 and click on the link to take you to
eep.
erm... we never posted RCX-RCX sample code up. never gave any of the
students two bricks. and the LNP code up on our website has our own hacked
up libraries and stuff.
Below is a sample set of programs. It consists of two files which I've
named brick1.c and brick2.c It's not the prettiest code, but it should give
you an idea of how to do RCX-RCX communication. I've assumed that the brick
running brick1.c has LNP host address 0x10, and is listening on port 1. If
you feel masochistic, you can read through the docs I ripped up on the
aforementioned website.
hope this helps a little.
Albert
file:// brick1.c
--------------------
#include <lnp/lnp.h>
#include <string.h>
#include <conio.h>
#include <dlcd.h>
#include <dsound.h>
char address_buf[255];
int buf_len = 0;
char sender;
note_t notes_short[] = { { PITCH_C4, EIGHTH },
{ PITCH_END, EIGHTH } };
static void port_handler(const unsigned char *data,
unsigned char length,
unsigned char src)
{
memcpy(address_buf, data, length);
sender = src;
buf_len = length;
}
static wakeup_t havepack(wakeup_t w)
{
return buf_len;
}
int read_from_ir(char *data, unsigned char *src)
{
int ret;
wait_event(havepack, 0);
memcpy(data, address_buf, buf_len);
ret = buf_len;
buf_len = 0;
if (src) *src = sender;
return ret;
}
int main(int argc, char *argv[])
{
char buf[256];
int len;
lnp_addressing_set_handler(1, port_handler);
while(1)
{
len = read_from_ir(buf, 0);
lcd_int(len);
msleep(500);
dsound_play(notes_short);
cputs(buf);
msleep(1000);
cls();
}
return 0;
}
------------------------------------
file:// brick2.c
--------------------------------------
#include <lnp/lnp-logical.h>
#include <lnp/lnp.h>
#include <conio.h>
#include <string.h>
#include <dlcd.h>
#include <dsound.h>
#define BRICK1_DEST 0x11
char address_buf[255];
int buf_len = 0;
char sender;
int main(int argc, char *argv[])
{
char buf[256];
strcpy(buf, "1234");
cputs(buf);
lnp_logical_range(1);
lnp_addressing_write(buf, strlen(buf),
BRICK1_DEST, 1);
msleep(1000);
strcpy(buf, "brik");
cputs(buf);
lnp_addressing_write(buf, strlen(buf),
BRICK1_DEST, 1);
return 0;
}
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Message is in Reply To:
 | | Re: RCX to RCX communication
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| (...) Mark, I was a TA(Teaching Assistant) for a course at Brown University that invovled building robots with the mindstorms kit. Go to the web site: (URL) and click on the link to take you to the normal page. Then go to the "LegOS" section fo the (...) (22 years ago, 14-Jul-02, to lugnet.robotics.rcx.legos)
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