琢磨了几个头文件，懂了。。stm32f10x_type.h这个头文件类有定义，这是一个开发板的例程中的代码，这是arm的默认头文件还是这个开发板的技术员写的。

/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************

* File Name          : * Author             : MCD Application Team

* Version            : V2.0.1

* Date               : 06/13/2008

* Description        : This file contains all the common data types used for the

*                      STM32F10x firmware library.

********************************************************************************

* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.

* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,

* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE

* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING

* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

*******************************************************************************/

/* Define to prevent recursive inclusion -------------------------------------*/

#ifndef __STM32F10x_TYPE_H

#define __STM32F10x_TYPE_H

/* Includes ------------------------------------------------------------------*/

/* Exported types ------------------------------------------------------------*/

typedef signed long  s32;

typedef signed short s16;

typedef signed char  s8;

typedef signed long  const sc32;  /* Read Only */

typedef signed short const sc16;  /* Read Only */

typedef signed char  const sc8;   /* Read Only */

typedef volatile signed long  vs32;

typedef volatile signed short vs16;

typedef volatile signed char  vs8;

typedef volatile signed long  const vsc32;  /* Read Only */

typedef volatile signed short const vsc16;  /* Read Only */

typedef volatile signed char  const vsc8;   /* Read Only */

typedef unsigned long  u32;

typedef unsigned short u16;

typedef unsigned char  u8;

typedef unsigned long  const uc32;  /* Read Only */

typedef unsigned short const uc16;  /* Read Only */

typedef unsigned char  const uc8;   /* Read Only */

typedef volatile unsigned long  vu32;

typedef volatile unsigned short vu16;

typedef volatile unsigned char  vu8;

typedef volatile unsigned long  const vuc32;  /* Read Only */

typedef volatile unsigned short const vuc16;  /* Read Only */

typedef volatile unsigned char  const vuc8;   /* Read Only */

typedef enum {FALSE = 0, TRUE = !FALSE} bool;

typedef enum {RESET = 0, SET = !RESET} FlagStatus, ITStatus;

typedef enum {DISABLE = 0, ENABLE = !DISABLE} FunctionalState;

#define IS_FUNCTIONAL_STATE(STATE) (((STATE) == DISABLE) || ((STATE) == ENABLE))

typedef enum {ERROR = 0, SUCCESS = !ERROR} ErrorStatus;

#define U8_MAX     ((u8)255)

#define S8_MAX     ((s8)127)

#define S8_MIN     ((s8)-128)

#define U16_MAX    ((u16)65535u)

#define S16_MAX    ((s16)32767)

#define S16_MIN    ((s16)-32768)

#define U32_MAX    ((u32)4294967295uL)

#define S32_MAX    ((s32)2147483647)

#define S32_MIN    ((s32)-2147483648)

/* Exported constants --------------------------------------------------------*/

/* Exported macro ------------------------------------------------------------*/

/* Exported functions ------------------------------------------------------- */

#endif /* __STM32F10x_TYPE_H */

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/