RTT常用數(shù)據(jù)類型定義在rtdef.h中

/* RT-Thread basic data type definitions */
typedef signed   char                   rt_int8_t;      /**<  8bit integer type */
typedef signed   short                  rt_int16_t;     /**< 16bit integer type */
typedef signed   long                   rt_int32_t;     /**< 32bit integer type */
typedef unsigned char                   rt_uint8_t;     /**<  8bit unsigned integer type */
typedef unsigned short                  rt_uint16_t;    /**< 16bit unsigned integer type */
typedef unsigned long                   rt_uint32_t;    /**< 32bit unsigned integer type */
typedef int                             rt_bool_t;      /**< boolean type */

/* 32bit CPU */
typedef long                            rt_base_t;      /**< Nbit CPU related date type */
typedef unsigned long                   rt_ubase_t;     /**< Nbit unsigned CPU related data type */

typedef rt_base_t                       rt_err_t;       /**< Type for error number */
typedef rt_uint32_t                     rt_time_t;      /**< Type for time stamp */
typedef rt_uint32_t                     rt_tick_t;      /**< Type for tick count */
typedef rt_base_t                       rt_flag_t;      /**< Type for flags */
typedef rt_ubase_t                      rt_size_t;      /**< Type for size number */
typedef rt_ubase_t                      rt_dev_t;       /**< Type for device */
typedef rt_base_t                       rt_off_t;       /**< Type for offset */

/* boolean type definitions */
#define RT_TRUE                         1               /**< boolean true  */
#define RT_FALSE                        0               /**< boolean fails */

/* RT-Thread error code definitions */
#define RT_EOK                          0               /**< There is no error */
#define RT_ERROR                        1               /**< A generic error happens */
#define RT_ETIMEOUT                     2               /**< Timed out */
#define RT_EFULL                        3               /**< The resource is full */
#define RT_EEMPTY                       4               /**< The resource is empty */
#define RT_ENOMEM                       5               /**< No memory */
#define RT_ENOSYS                       6               /**< No system */
#define RT_EBUSY                        7               /**< Busy */
#define RT_EIO                          8               /**< IO error */

現(xiàn)在感覺問題：類型帶_t，容易與后續(xù)指針混淆，定義的后續(xù)實體變量指針都帶_t，如：

typedef struct rt_device *rt_device_t;

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