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STM32 USARTs

Question asked by doolin74 on Dec 30, 2012
Latest reply on Dec 30, 2012 by Clive One
USART on STM32407 Discovery Board
When trying to use the usarts on this discovery board I keep getting *** error 65: access violation at 0x40023800 : no 'read' permission and stops running at this line of code
  RCC->CR |= (uint32_t)0x00000001;
 /* Reset CFGR register */
  RCC->CFGR = 0x00000000;
 /* Reset HSEON, CSSON and PLLON bits */
  RCC->CR &= (uint32_t)0xFEF6FFFF;
can any one help me with this please?

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