lnp-logical.h File Reference

LNP Interface: link networking protocol logical layer. More...

#include <config.h>
#include <mem.h>
#include <sys/h8.h>

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Functions

void lnp_logical_range (int far)
 Set the IR transmitter range.
int lnp_logical_range_is_far (void)
 Test the IR transmitter range setting.
int lnp_logical_write (const void *buf, size_t len)
 Write buffer to IR port.
void lnp_logical_fflush (void)
 Empty the IR receive buffer.


Detailed Description

LNP Interface: link networking protocol logical layer.

Author:
Markus L. Noga <markus@noga.de>

Definition in file lnp-logical.h.


Function Documentation

void lnp_logical_fflush ( void   ) 

Empty the IR receive buffer.

Returns:
Nothing

void lnp_logical_range ( int  far  )  [inline]

Set the IR transmitter range.

Configure the INFRARED transmitter power

Parameters:
far,: 0: sets short range, 1: sets long range
Returns:
Nothing
NOTE1: this setting remains in effect until changed or the RCX power is turned off.

NOTE2: toggles port 4 bit 0

Todo:
determine what clears this and then correct NOTE1

Definition at line 62 of file lnp-logical.h.

int lnp_logical_range_is_far ( void   )  [inline]

Test the IR transmitter range setting.

Determine if the INFRARED transmitter power is set to long range

Returns:
T/F where TRUE means transmitter is set to long range

Definition at line 73 of file lnp-logical.h.

References PORT4.

int lnp_logical_write ( const void *  buf,
size_t  len 
)

Write buffer to IR port.

Write {len} chars (starting at {buf}) to IR port.

Parameters:
buf pointer to array of chars to be written
len number of chars in array (to be written)
Returns:
0 if OK, else collision
NOTE: doesn't return until all are written (blocking write)


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Original code copyright 1998-2005 by the authors.

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