RE: [avr-gcc-list] Strings and structures in program memory

[Eric Weddington]

Unfortunately, no. That's why it is a FAQ. ;-)

Eric Weddington 

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Trampas
> Sent: Friday, December 01, 2006 11:59 AM
> To: 'AVR GCC List'
> Subject: RE: [avr-gcc-list] Strings and structures in program memory
> 
> Thanks for the information. Is there anyway to do this 
> without declaring
> each string external from the array? 
> 
> Trampas
> 
> -----Original Message-----
> From: Eric Weddington [mailto:address@hidden 
> Sent: Friday, December 01, 2006 11:55 AM
> To: 'Trampas'; 'AVR GCC List'
> Subject: RE: [avr-gcc-list] Strings and structures in program memory
> 
> 
> Avr-libc FAQ #14:
> <http://www.nongnu.org/avr-libc/user-manual/FAQ.html#faq_rom_array> 
> 
> 
> > -----Original Message-----
> > From: 
> > address@hidden 
> > [mailto:address@hidden
> > org] On Behalf Of Trampas
> > Sent: Friday, December 01, 2006 9:43 AM
> > To: 'AVR GCC List'
> > Subject: [avr-gcc-list] Strings and structures in program memory
> > 
> > I am trying to create a simple command processor and was 
> > trying to figure out how to get strings and even the commands 
> > structure to live and operate from program memory. Can anyone 
> > show me how to do this?
> > 
> >  
> > 
> > #define COMMAND(NAME, help)  { PSTR( #NAME ), NAME ## _cmd, 
> > PSTR( help ) }
> > 
> >  
> > 
> > //Command structure
> > 
> > struct Command
> > 
> > {
> > 
> >             PSTR name;
> > 
> >             int (*function) (int, char **);
> > 
> >             PSTR help;
> > 
> > };
> > 
> >  
> > 
> > //Prototypes
> > 
> > int help_cmd(int, char **);
> > 
> > int exit_cmd(int, char **);
> > 
> >  
> > 
> > //List of supported commands
> > 
> > struct Command commands[] =
> > 
> > {
> > 
> >             {PSTR("help"), help_cmd, PSTR("help")}, //COMMAND 
> > (help, "Prints this message"),
> > 
> >             {PSTR("exit"), exit_cmd, PSTR("exit")},//COMMAND 
> > (exit, "Exits command mode"),           
> > 
> >             {PSTR(""),0,PSTR("")}, //End of list signal
> > 
> > };
> > 
> >  
> > 
> > Then to parse commands I was trying:
> > 
> >  
> > 
> >             //now let's parse the command
> > 
> >             i=0;
> > 
> >             while(strlen_P(commands[i].name)!=0)
> > 
> >             {
> > 
> >                         if (strcmp_P(buff,commands[i].name)==0)
> > 
> >                                     return 
> > (*commands[i].function)(numArgs,ptrArgv);
> > 
> >                         i=i+1;
> > 
> >             }
> > 
> >  
> > 
> > However this does not seem to work. 
> > 
> >  
> > 
> > Thanks 
> > 
> > Trampas
> > 
> >  
> > 
> >  
> > 
> > 
> 
> 
> 
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