main.c

STR7系列32位ARM控制器的固件库

 /******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Version            : V4.0
* Date               : 10/09/2007
* Description        : Main program body
********************************************************************************
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "71x_lib.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
u32 MCLK_Freq, PLCK1_Freq,PCLK2_Freq ;

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
  #ifdef DEBUG
  debug();
  #endif

  /* System clocks configuration ---------------------------------------------*/
   
  /* Configure PCLK1 = RCLK / 2 */
  RCCU_PCLK1Config (RCCU_RCLK_2);

  /* Configure PCLK2 = RCLK / 2 */
  RCCU_PCLK2Config (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) ;
  
  /* Enable CKOUT clock on APB2 */
  APB_ClockConfig (APB2, ENABLE, CKOUT_Periph);
   
  /* Get MCLK, PCLK1, PCLK2 frequency values */ 
  MCLK_Freq=RCCU_FrequencyValue (RCCU_MCLK);
  PLCK1_Freq=RCCU_FrequencyValue (RCCU_PCLK1);
  PCLK2_Freq=RCCU_FrequencyValue (RCCU_PCLK2);

  /* At this step the MCLK = 24 MHz, PCLK1 = 12 MHz and PCLK2 = 12MHz
    with an external oscilator equal to 16MHz;  */

  
  while(1)
  {
  }
}

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/