Re: [avr-gcc-list] pointer to program memory string

[E. Weddington]

On 24 Nov 2004 at 15:39, Leo Hendrawan wrote:

> Hello all,
> 
> suppose i have a struct which is:
> 
>       struct a {
>               char*data;      // data to be sent
>               unsigned int datalen;
>               char*datasrc;   // data source
>       };
> 
> and i have some program memory strings:
> 
>       char b[] PROGMEM = {"........"};
>       char c[] PROGMEM = {"............."};
> 
> then could point the datasrc above to these program memory strings like
> this:
> 
>       a->data = &buffer[0];   // point to the data buffer to be sent
> 
>       a->datasrc = &b[0]; (or) a->datasrc = &c[0];
> 
>       a->datalen = strlen_P(datasrc);
> 
>       for(i=0 ; i<(a->datalen-1) ; i++)
>       {
>               a->data[i]=PRG_RDB(a->datasrc[i]);
>       }
> 

Also PRG_RDB() is deprecated. Please use pgm_read_byte().