Subject:
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First time kernel hacker...
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sat, 30 Jun 2001 02:08:14 GMT
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Viewed:
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1766 times
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Hi all,
Im fiddling with the kernel for the first time and I have a problem I was
wondering if anyone could help with. I really needed a function to be
executed at exact pulse intervals and msleep wasnt doing it for me so I
thought Id put a call into systime_handler. I just basically cut and past
code from dmotor to get it working. In systime.c (systime_handler):
#ifdef CONF_DLNP
"
jsr _dlnp_handler ; call directlnp hander
"
and then I included a directlnp.h and .c with the following (.c):
#ifdef CONF_RCX_COMPILER
void dlnp_handler(void)
{
#else
HANDLER_WRAPPER("dlnp_handler","dlnp_core");
void dlnp_core(void)
{
#endif
return;
}
and (.h):
extern void dlnp_handler()
#ifdef CONF_RCX_COMPILER
__attribute__ ((rcx_interrupt))
#endif
;
This compiles and runs fine until you upload certain lx files. I dont know
why but if you put a getchar() call into your program it will crash the
entire RCX - you cant even turn it off! Simply nothing works.
I would really appreciate any help at all because I dont know how something
so simple is going wrong! By the way, if anyone is intrigued, Im writing an
extension to lnp to allow communication between two RCXs via a cable
connected to the motor on one and the sensor port on the other.
Thanks again for any help,
Nathan Lovell
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