Re: [avr-gcc-list] initialized progmem data at fix address

[Eivind Sivertsen]

Hi,
I dont know if the #pragma option works, but I know you can do this 
(e.g. in your main .c file):

// 1) Define the segment.
#define FLASHDATA __attribute__ ((section (".flashdata")))

// 2) Declare the data array.
const unsigned char data_array[] FLASHDATA = {0xd9, 0xce, 0xe3, ..., 
...etc, etc};


Then add this linker command under the others in the makefile:

LDFLAGS += -Wl,--section-start=.flashdata=0x1E800


Cheers,
Eivind



> Hi,
>
> use: #pragma yoursection="ANYNAME"
>
> then in your makefile write:
> ANYNAME_ADDRESS = 8000
> LDFLAGS += -Wl,--section-start=.text=$(ANYNAME_ADDRESS)
>
> Attention: gcc understands 8000 as BYTE address!
>
>  
>
> > hi,
> >
> > how can i create an initialized progmem data at fix address in program
> > flash in C?
> >
> >  ie.: bootloader version number:
> >  uint16_t version;   // at address 0x1E800
> >
> > thanks: Andras
> >
> >
> >
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> >    
>
>
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