Lpc2000

The crossstudio library implements printf in terms of a function called 
__putchar - all you have to do is supply an implementation of this 
function e.g.

void __putchar(int ch)
{
    debug_putchar(ch);
}

We supply many variants of printf/scanf and friends which enable the 
functionality (hence code size) to be trimmed down as required. The 
selection of the print/scanf library is determined by the Printf/Scanf 
properties.

Regards
Michael

>I'm use CrossStudio to compile. And a just want to use printf. The 
>compiler is always telling my that I hava to implement __putChar. So 
>I thought it is handy to build a Com class, so I can use printf. But 
>it is not working as a hoped.
>
>Thanks 
>
>ps my there are beter way's
>
>--- In lpc2000@yahoogroups.com, "Anton Erasmus" <antone@s...> wrote:
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>>On 24 Mar 2005 at 9:15, neptunus1000 wrote:
>>
>>    
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>>>Hello,
>>>
>>>I'wondering why my classes are not working. I want to build a Com
>>>class so a can use printf to put something on the uart.
>>>
>>>The functie's com.UARTWriteChar('x'); com.__putchar('\n'); in the 
>>>      
>>>
>main
>  
>
>>>are working good. But the printf is not working. Can some one 
>>>      
>>>
>help my.
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>
>>{Code snipped]
>>
>>
>>Getting printf to output using your own routines, is more a 
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>question of porting the
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>>standard C library than anything else. Which compiler do you use, 
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>and which standard
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>>library ?  If it is newlib, then look at the new-lib_lpc stubs 
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>library to see an example of
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>>how to port newlib.
>>
>>Regards
>>   Anton Erasmus
>>
>>
>>-- 
>>A J Erasmus
>>    
>>
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