Subject:
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lnp addressing messages
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 26 Aug 2002 23:08:48 GMT
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Viewed:
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2201 times
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I have some problem to understand the lnp addressing message. How to set
addresse of computer. How to send a message etc ...
I have an example (lnpd example but i don't understand this :
#define DEST_ADDR ( DEST_HOST << 4 | DEST_PORT )
result = lnp_addressing_write(data,len ,DEST_ADDR,MY_PORT_1);
here is the complete program :
//
// kleines Testprogram für linux lnp
//
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include "liblnp.h"
#define MY_PORT_1 7
#define MY_PORT_2 8
#define DEST_HOST 0
#define DEST_PORT 2
#define DEST_ADDR ( DEST_HOST << 4 | DEST_PORT )
#define LEN 253
void addr_handler_1(const unsigned char* data,unsigned char length, unsigned
char src)
{
char pbuf[100];
sprintf(pbuf,">> Source:%2X Length:%u PacketNo:%u
<<\n",(unsigned)src,(unsigned)length,(unsigned)data[0]);
write(STDERR_FILENO,pbuf,strlen(pbuf));
}
void addr_handler_2(const unsigned char* data,unsigned char length, unsigned
char src)
{
char pbuf[100];
sprintf(pbuf,">> Source:%2X Length:%u PacketNo:%u
<<\n",(unsigned)src,(unsigned)length,(unsigned)data[0]);
write(STDERR_FILENO,pbuf,strlen(pbuf));
}
void int_handler(const unsigned char* data,unsigned char length)
{
char pbuf[100];
sprintf(pbuf,">> Integrity Length:%u PacketNo:%u
<<\n",(unsigned)length,(unsigned)data[0]);
write(STDERR_FILENO,pbuf,strlen(pbuf));
}
int main(int argc, char *argv[])
{
char data[253];
int i;
lnp_tx_result result;
unsigned char len;
int count = 0;
for (i=0;i<sizeof(data);i++) data[i] = i;
if ( lnp_init(0,0,0,0,0) )
{
perror("lnp_init");
exit(1);
}
else fprintf(stderr,"init OK\n");
lnp_addressing_set_handler (MY_PORT_1, addr_handler_1);
lnp_addressing_set_handler (MY_PORT_2, addr_handler_2);
lnp_integrity_set_handler (int_handler);
while (1)
{
file://sleep(1000);
file://continue;
len = LEN; file://random() % 252 + 1;
result = lnp_addressing_write(data,len ,DEST_ADDR,MY_PORT_1);
switch (result)
{
case TX_SUCCESS:
printf("Tansmitted %d : %d\n",len,count++);
break;
case TX_FAILURE:
printf("Collision\n");
break;
default:
perror("Transmit error");
exit(1);
}
}
return 0;
}
thanks
nanobapt
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Message is in Reply To:
 | | Cyggy
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| I have a vaguely important post which is: the new version of Cygwin is a bugger to get working with Brickos 0.2.6, but the old version, Cygwin B-20 works fine so nobody waste your time on the new version of Cyggy and download it from (URL) for (...) (22 years ago, 22-Aug-02, to lugnet.robotics.rcx.legos)
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