main.c

str75x的软件库源代码

/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 07/17/2006
* Description        : Main program body
********************************************************************************
* History:
* 07/17/2006 : V1.0
********************************************************************************
* 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 "75x_lib.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_InitTypeDef TIM_InitStructure;
ErrorStatus OSC4MStartUpStatus;

/* Private function prototypes -----------------------------------------------*/
void GPIO_Configuration(void);
void MRCC_Configuration(void);

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

  /* MRCC Configuration */
  MRCC_Configuration();
  
  /* GPIO Configuration */
  GPIO_Configuration();
  
  /* TIM1 configuration in Encoder mode */  
  TIM_InitStructure.TIM_Mode = TIM_Mode_Encoder3;              
  TIM_InitStructure.TIM_Prescaler = 0x1;                     
  TIM_InitStructure.TIM_ClockSource = TIM_ClockSource_Internal;       
  TIM_InitStructure.TIM_Period = 0xFFFF;                  
  TIM_InitStructure.TIM_IC1Selection = TIM_IC1Selection_TI1;
  TIM_InitStructure.TIM_IC1Polarity = TIM_IC1Polarity_Falling;
  TIM_InitStructure.TIM_IC2Selection = TIM_IC2Selection_TI2;
  TIM_InitStructure.TIM_IC2Polarity = TIM_IC2Polarity_Falling;
       
  TIM_Init(TIM1, &TIM_InitStructure);

  /* Enable the TIM1 counter */
  TIM_Cmd(TIM1, ENABLE);

  while(1);
}
  
/*******************************************************************************
* Function Name  : MRCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void MRCC_Configuration(void)
{
  /* MRCC system reset(for debug purpose) */
  MRCC_DeInit();

  /* Wait for OSC4M start-up */
  OSC4MStartUpStatus = MRCC_WaitForOSC4MStartUp();

  if(OSC4MStartUpStatus == SUCCESS)
  {
    /* Set HCLK to 60 MHz */
    MRCC_HCLKConfig(MRCC_CKSYS_Div1);

    /* Set CKTIM to 60 MHz */
    MRCC_CKTIMConfig(MRCC_HCLK_Div1);

    /* Set PCLK to 30 MHz */
    MRCC_PCLKConfig(MRCC_CKTIM_Div2);

    /* Enable Flash burst mode */
    CFG_FLASHBurstConfig(CFG_FLASHBurst_Enable);

    /* Set CKSYS to 60 MHz */
    MRCC_CKSYSConfig(MRCC_CKSYS_OSC4MPLL, MRCC_PLL_Mul_15);
  }

  /* GPIO pins optimized for 3V3 operation */
  MRCC_IOVoltageRangeConfig(MRCC_IOVoltageRange_3V3); 

  /* Enable GPIO and TIM1 clock */
  MRCC_PeripheralClockConfig(MRCC_Peripheral_GPIO | MRCC_Peripheral_TIM1, ENABLE);
}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the used GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* TIM1_TI1(P0.29) and TIM1_TI2(P0.31) pins configuration */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;              
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_29 | GPIO_Pin_31;
  GPIO_Init(GPIO0, &GPIO_InitStructure);
}

/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/