See the manual. You'll need to define your own putchar. for example:
void putchar (char tx_data)
{
// write to registers to tx the data. TX buffering, etc
}
On 10/5/2011 7:16 PM, Theo Tijssen wrote:
Hello! I have a simple program in C language that I was hoping to
compile in the SDCC compiler so I could download it onto my 8051
microcontroller. The code is:
*
/* Hello World program */
#include<stdio.h>
main()
{
printf("Hello World");
}*
The issue I am having is when I compile this in SDCC, the error reads:
*?ASlink-Warning-Undefined Global '_putchar' referenced by module
'vprintf'*
I tried putting in a general putchar code but that didn't work, it
just gave me more errors in the compiler. Do you know how to fix this
or what we need to add to our code in order for the compiler to
properly compile it? Any help and/or suggestions are appreciated.
Thanks in advance!
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------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2dcopy1
_______________________________________________
Sdcc-user mailing list
Sdcc-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/sdcc-user
