系统始终一切换到PLL输出就出错。。。

只看该作者 · 2009-9-5 21:10

#define  RCC_CR                      *((long int*)0x40021000)
#define  RCC_CFGR                   *((long int*)0x40021004)
#define  RCC_CIR                      *((long int*)0x40021008)
#define  RCC_APB2RSTR                *((long int*)0x4002100C)
int main()
{
  RCC_CR = 0x00010001;
  while(!(RCC_CR & 0x00020000));
  RCC_CFGR  = 0x006BC000;
  RCC_CR |= 0x01000000;
  while(!(RCC_CR & 0x02000000));
  RCC_CFGR |= 0x00000002;
  while((RCC_CFGR & 0x0000000C) != 0x00000008); 一到着程序就飞了:(

  RCC_APB2RSTR = 0x00005E7D;
  while(1);
}