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Hi,
I'm just getting started using LNP, read the howto and tried to play
around with the examples therein. However, somthing goes wrong. I have a
little programm on the RCX increasing a counter every second, displaying
it's value on the lCD and sending it to the PC. On the PC side this
value should be displayed as soon as it's reveived.
The RCX side seems to work, at least the counter is increased, displayed
and something is sent out the IR port. The PC side however doesn't
display anything. When I look into lnpd's log, I see that eveytime the
RCX send something, I get errors:
[...]
238738:Logical > Frame Error
239791:Integrity > Integrity reset
239791:Logical > Frame Error
239795:Integrity > Integrity reset
239795:Logical > Frame Error
239799:Integrity > Integrity reset
239799:Logical > Frame Error
239803:Integrity > Integrity reset
239803:Logical > Frame Error
239807:Integrity > Integrity reset
[...]
Looks like something is received, just not understood. I'm running
brickOS-0.2.6.09.newConf2 on a Linux system and have no problems
programming the RCX otherwise. I got lnpd from
http://legos.sourceforge.net/files/linux/LNPD/, unfortunatly there is no
version number. RCX is 2.0 and I'm using a serial IR tower.
Below is the code I used for both, RCX and PC side. Any help is
appreciated!
Thanks,
BB
RCX Code:
#include <lnp.h>
#include <conio.h>
#include <string.h>
#include <lnp-logical.h>
#include <dkey.h>
#define MY_PORT 2
#define DEST_HOST 0x8
#define DEST_PORT 0x7
#define DEST_PORT_2 0x8
#define DEST_ADDR ( DEST_HOST << 4 | DEST_PORT )
#define DEST_ADDR_2 ( DEST_HOST << 4 | DEST_PORT_2 )
void printInt(int i)
{
char buf[3];
int result;
buf[0] = 'i';
memcpy(buf + 1, &i, 2);
result = lnp_addressing_write(buf,3, DEST_ADDR, MY_PORT);
}
wakeup_t prgmKeyCheck(wakeup_t data)
{
return dkey == KEY_PRGM;
}
int main ( int argc, char **argv ) {
int c=0;
lnp_logical_range ( 0 );
while ( 1 ) {
if (prgmKeyCheck(0)) break;
printInt ( c );
cputw( c++ );
sleep ( 1 );
}
cputs ( "done" );
return 0;
}
PC code:
#include <liblnp.h>
#include <stdio.h>
#define MY_PORT 2
#define DEST_HOST 0x8
#define DEST_PORT 0x7
#define DEST_PORT_2 0x8
#define DEST_ADDR ( DEST_HOST << 4 | DEST_PORT )
#define DEST_ADDR_2 ( DEST_HOST << 4 | DEST_PORT_2 )
void addr_handler(const unsigned char* data,unsigned char
length, unsigned char src)
{
int temp;
char *ptr;
switch(data[0])
{
case 's':
puts(data + 1);
break;
case 'i':
ptr = (char *)temp;
ptr[0] = data[2];
ptr[1] = data[1];
printf("%d", temp);
break;
}
}
int main ( int argc, char **argv ) {
if ( lnp_init ( 0, 0, 0, 0, 0 ) ) {
perror ( "lnp_init" );
exit(1);
} else {
printf ( "init OK\n" );
}
lnp_addressing_set_handler (MY_PORT, addr_handler );
while ( 1 ) {};
return 0;
}
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Message has 2 Replies:
 | | Re: LNP problem
|
| (...) Ok. This is indeed the result if you run the original LNP package. There are several problems with your sources, too. So try the following to get things done: First, go to the lnpd subdir and edit rcxtty.c. In function tty_init you find a line (...) (22 years ago, 5-Jan-03, to lugnet.robotics.rcx.legos)
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