Atmel CAVR-4 Manual De Usuario

CAVR-4

AVR–specific library functions

Reference Guide

You can override default formatters for the functions 

printf_P

 and 

scanf_P

 by 

editing the linker command file. Note that it is not possible to use the IAR Embedded 
Workbench interface for overriding the default formatter for the AVR-specific library 
routines.

To override the default 

printf_P

 formatter, type any of the following lines in your 

linker command file:

-e_small_write_P=_formatted_write_P

-e_medium_write_P=_formatted_write_P

To override the default 

scanf_P

 formatter, type the following line in your linker 

command file:

-e_medium_read_P=_formatted_read_P

memcmp_G

int memcmp_G(const void *s1, const void _ _generic *s2, size_t

 

n);

Identical to 

memcmp

 except that 

s2

 can be located in flash or data memory. This function 

is only available in the DLIB library.

memcpy_G

void * memcpy_G(void *s1, const void _ _generic *s2, size_t n);

Identical to 

memcpy

 except that it copies string 

s2

 in flash or data memory to string 

s2

 

in data memory. This function is only available in the DLIB library.

memcpy_P

void * memcpy_P(void *s1, PGM_P s2, size_t n);

Identical to 

memcpy

 except that it copies string 

s2

 in flash memory to string 

s2

 in data 

memory. This function is available in both the CLIB and the DLIB library.

printf_P

int printf_P(PGM_P _ _format,…);

Similar to 

printf

 except that the format string is in flash memory, not in data memory. 

This function is available in both the CLIB and the DLIB library. For information about 
how to override default formatter, see Specifying read and write formatters, page 250.

puts_G

int puts_G(const char _ _generic *s);

Identical to 

puts

 except that the string to be written can be in flash or data memory. This 

function is only available in the DLIB library.