STM32里的类型定义，见如下说明：
typedef volatile unsigned short vu16;
typedef __IO uint16_t vu16
/* IO definitions (access restrictions to peripheral registers) */
#ifdef __cplusplus
#define __I volatile /*!< defines 'read only' permissions */
#else
#define __I volatile const /*!< defines 'read only' permissions */
#endif
#define __O volatile /*!< defines 'write only' permissions */
#define __IO volatile /*!< defines 'read / write' permissions */
/* 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 */ Exported_types <Stm32f10x> 类型定义 typedef int32_t s32 typedef int16_t s16 typedef int8_t s8 typedef const int32_t sc32 typedef const int16_t sc16 typedef const int8_t sc8 typedef __IO int32_t vs32 typedef __IO int16_t vs16 typedef __IO int8_t vs8 typedef __I int32_t vsc32 typedef __I int16_t vsc16 typedef __I int8_t vsc8 typedef uint32_t u32 typedef uint16_t u16 typedef uint8_t u8 typedef const uint32_t uc32 typedef const uint16_t uc16 typedef const uint8_t uc8 typedef __IO uint32_t vu32 typedef __IO uint16_t vu16 typedef __IO uint8_t vu8 typedef __I uint32_t vuc32 typedef __I uint16_t vuc16 typedef __I uint8_t vuc8