AVR-Chat

john wrote:
> I'm trying to declare a structure but I keep getting an error like this
> or similar depending on were I try to put __attribute__.
> 
> error: expected '=', ',', ';', 'asm' or '__attribute__' before 'struct'
> 
> Does avr-gcc allow plain-old structures? How should I write this to get 
> it to compile?
> 
> struct __attribute__ ((__packed__)) rb_fifo_struct_type 
> {
>     uint8_t *head;
>     uint8_t *tail;
>     uint8_t *dptr;
> };
> typedef struct rb_fifo_struct_type rbuff_t;

Try: __attribute__ ((packed));

I think you should be doing:

struct rb_fifo_struct_type
{
     uint8_t *head __attribute__ ((packed));
     uint8_t *tail __attribute__ ((packed));
     uint8_t *dptr __attribute__ ((packed));
};
typedef struct rb_fifo_struct_type rbuff_t;