Atmel CAVR-4 Manual De Usuario

CAVR-4

Time

Reference Guide

This does not require that you rebuild the library. You can find source templates in the 
files 

Signal.c

 and 

Raise.c

 in the 

avr\src\lib

 directory. For information about 

overriding default library modules, see Overriding library modules, page 61. 

If you decide to rebuild the library, you can find source templates in the library project 
template. For further information, see Building and using a customized library, page 62.

To make the 

time

 and 

date

 functions work, you must implement the three functions 

clock

, 

time

, and 

_ _getzone

.

This does not require that you rebuild the library. You can find source templates in the 
files 

Clock.c

 and 

Time.c

, and 

Getzone.c

 in the 

avr\src\lib

 directory. For 

information about overriding default library modules, see Overriding library modules, 
page 61. 

If you decide to rebuild the library, you can find source templates in the library project 
template. For further information, see Building and using a customized library, page 62.

The default implementation of 

_ _getzone

 specifies UTC as the time-zone.

Note: If you link your application with support for I/O debugging, the functions 

clock

 

and 

time

 will be replaced by C-SPY variants that return the host clock and time 

respectively. For further information, see C-SPY Debugger runtime interface, page 76.

The function 

strtod

 does not accept hexadecimal floating-point strings in libraries 

with the normal library configuration. To make a library do so, you need to rebuild the 
library, see Building and using a customized library, page 62. Enable the configuration 
symbol 

_DLIB_STRTOD_HEX_FLOAT

 in the library configuration file.