Re: [avr-gcc-list] PROGMEM with boot loader

[Wolfgang Quack]

Hi Yannick,

uups, sorry.

The fprintf_P() in avr-libc-1.0.4 supports only near progmem.

Look at avr-libc-1.0.4/libc/stdio/vfprintf.c line 141:
The old style macro PRG_RDB() is used there.
This is defined as the near version of pgm_read_byte() instead of the
far version you need to access the upper memory.

Wolfgang


On Fri, 19 Nov 2004, Yannick PODGORSKI wrote:

> Hi Wolfgang,
> thanks for your answer but it doesn't work
> with "RAMPZ = 1" or "RAMPZ = 0".
> I try this before but nothing.
> I try again to put the section .text at the address 0x0
> and it works with "RAMPZ = 1" AND "RAMPZ = 0".
> It's strange because this bit allow me to access to upper
> or lower flash and I can access whatever the RAMPZ is.
> Thanks.
>
> Yannick
>
>
> > On Fri, 19 Nov 2004, Wolfgang Quack wrote
>
>
> > Hi Yannick,
> >
> > Just put "RAMPZ = 1;" in front of fprintf_P(...)
> >
> > You need this, because the const's are now in the upper space or flash.
> >
> > Wolfgang
>