[Sdcc-user] sprintf function and float and int (pic16)

[ALEXANDRE M. <al...@ae...>]

Hello Raphael, 

You said:
"Wow, you were able to use sprintf from the pic16 library?!? I also just  
committed some fixes to the way stringbuffers are handled: Prior to these,  
the pointer passed into sprintf would be modified by the  
strmputchar()-routine to always point to the terminating 0 byte... Maybe  
using a global buffer instead of a local pointer saved your day so far..."

Well I researched Internet about using sprintf function in SDCC because I had error like "data type" in linking process. So I found something that referred to modify the linker file.

I'm using PIC18F4550 with Ubuntu, piklab and SDCC. So I opened 18f4550.lkr (/usr/share/gputils/lkr) and made the follow modifications:

DATABANK   NAME=gpr0       START=0x60           END=0x7FF
//DATABANK   NAME=gpr1       START=0x100          END=0x1FF
//DATABANK   NAME=gpr2       START=0x200          END=0x2FF
//DATABANK   NAME=gpr3       START=0x300          END=0x3FF
//DATABANK   NAME=usb4       START=0x400          END=0x7FF          PROTECTED
//DATABANK   NAME=usb4       START=0x400          END=0x4FF          PROTECTED
//DATABANK   NAME=usb5       START=0x500          END=0x5FF          PROTECTED
//DATABANK   NAME=usb6       START=0x600          END=0x6FF          PROTECTED
//DATABANK   NAME=usb7       START=0x700          END=0x7FF          PROTECTED

What I did here was set all "DATABANK" in only one block. This made possible use sprintf function on pic16. Note that I tried to leave USB data banks unchanged, but that caused same error. The point is to configure all data banks as one entire bank or block.

I don't know if this is what you expected to help you, but that was made possible to use sprintf function in pic16.

About float, nothing yet! But still trying (I think my problem is how to compile and install SDCC with floats enabled - I feel I can reach there ;))

Best regards, 
Alexandre Martins
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