Atmel CAVR-4 Manual De Usuario

CAVR-4

Descriptions of intrinsic functions

Reference Guide

Note: You must have enabled language extensions to use this intrinsic function.

_ _segment_end

void * __segment_end(segment);

Returns the address of the first byte after the named 

. The named 

 

must be a string literal that has been declared earlier with the 

#pragma

 

segment

 

directive. See #pragma segment, page 224.

If the segment was declared with a memory attribute 

, the type of the 

_ _segment_end

 function is pointer to 

 

void

. Otherwise, the type is a default 

pointer to 

void

.

#pragma segment="MYSEG" _ _huge

...

segment_end_address = _ _segment_end("MYSEG");

Here, the type of the 

_ _segment_end

 intrinsic function is 

void _ _huge *

.

Note: You must have enabled language extensions to use this intrinsic function.

_ _sleep

void _ _sleep(void);

Inserts a sleep instruction, 

SLEEP

. To use this intrinsic function, make sure that the 

instruction has been enabled in the 

MCUCR

 register.

_ _swap_nibbles

unsigned char _ _swap_nibbles(unsigned char);

Swaps bit 0-3 with bit 4-7 of the parameter and returns the swapped value.

_ _watchdog_reset

void _ _watchdog_reset(void);

Inserts a watchdog reset instruction.