STAT_BUSY
#define STAT_BUSY 0xFF
STAT_BUSY = 1 << 0, /* cmd in progress */
#define STAT_BUSY (1 << 14)
#define STAT_BUSY 0x4000 /* status: frame/command is busy */
STAT_BUSY = 1 << 0, /* cmd in progress */
STAT_BUSY = 1 << 0, /* cmd in progress */