Hi,
> typedef union {
> struct {
> unsigned URSTIE : 1;
> unsigned UERRIE : 1;
> unsigned ACTVIE : 1;
> unsigned TRNIE : 1;
> unsigned IDLEIE : 1;
> unsigned STALLIE : 1;
> unsigned SOFIE : 1;
> unsigned : 1;
> };
> } __UIE_t;
>
> Now what I would like to understand is why this is 'union/struct'
> instead of just a 'struct'?
This code is generated and is generic to allow multiple names for any
given bit using something like
typedef union {
struct {
unsigned URSTIE : 1;
unsigned UERRIE : 1;
unsigned ACTVIE : 1;
unsigned TRNIE : 1;
unsigned IDLEIE : 1;
unsigned STALLIE : 1;
unsigned SOFIE : 1;
unsigned : 1;
};
struct {
unsigned alt_URSTIE : 1;
unsigned alt_UERRIE : 1;
unsigned alt_ACTVIE : 1;
unsigned alt_TRNIE : 1;
unsigned alt_IDLEIE : 1;
unsigned alt_STALLIE : 1;
unsigned alt_SOFIE : 1;
unsigned : 1;
};
} __UIE_t;
Some SFR actually use this. To simplify the generator, *all* structs are
wrapped in unions.
Best regards
Raphael
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