#define PERIPH_BASE           ((u32)0x40000000)
#define AHBPERIPH_BASE        (PERIPH_BASE + 0x20000)
#define RCC_BASE              (AHBPERIPH_BASE + 0x1000)

/*------------------------ Reset and Clock Control ---------------------------*/
typedef struct
{
  vu32 CR;
  vu32 CFGR;
  vu32 CIR;
  vu32 APB2RSTR;
  vu32 APB1RSTR;
  vu32 AHBENR;
  vu32 APB2ENR;
  vu32 APB1ENR;
  vu32 BDCR;
  vu32 CSR;
} RCC_TypeDef;

#define RCC                 ((RCC_TypeDef *) RCC_BASE)

typedef volatile unsigned long  vu32;