数据结构设计

typedef struct aic_cir
{
    struct rt_device    dev;
    aic_cir_ctrl_t      aic_cir_ctrl;
    cir_config_t        config;
} aic_cir_t;

typedef enum {
    CIR_EVENT_RECEIVE_COMPLETE,
    CIR_EVENT_ERROR,
} cir_event_t;

typedef struct aic_cir_ctrl aic_cir_ctrl_t;
struct aic_cir_ctrl {
    unsigned long       cir_base;
    uint8_t             irq_num;
    uint8_t             clk_idx;
    void (*callback)(aic_cir_ctrl_t *aic_cir_ctrl, cir_event_t event,
                     void *arg);
    void                *arg;
    uint8_t             tx_data[128];
    uint8_t             rx_data[128];
    uint32_t            rx_idx;
    uint8_t             rx_level;
    uint8_t             rx_flag; /* Indicates if rxfifo has received data */
};