PIOB_WRITE
#define PIOB_WRITE(_reg, _val) do {*((volatile uint32_t *)(AT91RM9200_PIOB_BASE + (_reg))) = (_val);} while (0)
#define PIOB_WRITE(_reg, _val) do {*((volatile uint32_t *)(AT91SAM9260_PIOB_BASE + (_reg))) = (_val);} while (0)
#define PIOB_WRITE(_reg, _val) do {*((volatile uint32_t *)(AT91SAM9261_PIOB_BASE + (_reg))) = (_val);} while (0)