如何声明易失性结构的C数组

Question

I defined a struct and I do not want to put the volatile into the struct because other instance may not need it (eg RAM caching). Now I need that a particular array of this struct be volatile.

typedef struct{
    uint8_t rxPacket[FIFO_SIZE];
    uint8_t length;
    int8_t rssi;
    uint8_t lqi;
}rawRx_t;

Is this the right way to have each (struct) element of the array volatile ?

static volatile rawRx_t rawRxBuffer[NB_MAX_RX_FRAME];

Answer 1

Yes.

Paring it down and switching the type to something cdecl.org can parse, we get:

volatile int rawRxBuffer[];

and the corresponding output is:

declare rawRxBuffer as array of volatile int

the point is that it's an "array of volatile", ie each array element is volatile.