int main(void)
{
#ifdef DEBUG
debug();
#endif
/* RCCU peripheral configuration ------------------------------------------*/
/* Configure FCLK = RCLK /2 */
RCCU_FCLKConfig ( RCCU_RCLK_2 );
/* Configure PCLK = RCLK /2 */
RCCU_PCLKConfig (RCCU_RCLK_2);
/* Configure MCLK clock for the CPU, RCCU_DEFAULT = RCLK /1 */
RCCU_MCLKConfig (RCCU_DEFAULT);
/* Configure the PLL1 ( * 12 , / 4 ) */
RCCU_PLL1Config (RCCU_PLL1_Mul_12, RCCU_Div_4) ;
/* Wait PLL to lock */
while(RCCU_FlagStatus(RCCU_PLL1_LOCK)==RESET);
/* Select PLL1_Output as RCLK clock */
RCCU_RCLKSourceConfig (RCCU_PLL1_Output) ;
/* At this step the CKOUT signal should be equal to 12 MHz with
an external oscilator equal to 16MHz */
while(1);
}
static void prvSetupHardware( void )
{
/* Setup the PLL to generate a 48MHz clock from the 4MHz CLK. */
/* Turn of the div by two. */
RCCU_Div2Config( DISABLE );
/* 48MHz = ( 4MHz * 12 ) / 1 */
RCCU_PLL1Config( RCCU_PLL1_Mul_12, RCCU_Div_1 );
RCCU_RCLKSourceConfig( RCCU_PLL1_Output );
}
static void str7_RccInit()
{
//系统基本初始化
RCCU_MCLKConfig(RCCU_DEFAULT); //MCLK = RCLK
RCCU_FCLKConfig(RCCU_RCLK_2); //FCLK = RCLK/2
RCCU_PCLKConfig(RCCU_RCLK_4); //PCLK = RCLK/4
RCCU_PLL1Config(RCCU_PLL1_Mul_12, RCCU_Div_2); //48MHz PLL @ 16MHz XTAL
while (RCCU_FlagStatus(RCCU_PLL1_LOCK) == RESET); //Wait for PLL to Lock
RCCU_RCLKSourceConfig(RCCU_PLL1_Output); //Select PLL for RCLK
}
