75x_tim.c

嵌入式实验源码。包括：电源管理、复位、时钟管理

/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name          : 75x_tim.c
* Author             : MCD Application Team
* Date First Issued  : 03/10/2006 : V0.1
* Description        : This file provides all the TIM software functions.
********************************************************************************
* History:
* 03/10/2006 : V0.1
********************************************************************************
* 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_tim.h" 
#include "75x_mrcc.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* TIM interrupt masks */
#define TIM_IT_Clear_Mask   0x7FFF
#define TIM_IT_Enable_Mask  0x7FFF

/* TIM Input Capture Selection Set/Reset */
#define TIM_IC1S_Set    0x0001
#define TIM_IC1S_Reset  0x003E

/* TIM Input Capture Selection Set/Reset */
#define TIM_IC2S_Set    0x0002
#define TIM_IC2S_Reset  0x003D

/* TIM_SCR Masks bit */
#define TIM_Encoder_Mask                   0x731C
#define TIM_SlaveModeSelection_Mask        0x7307
#define TIM_TriggerSelection_Mask          0x701F
#define TIM_InternalTriggerSelection_Mask  0x031F

/* TIM Encoder mode Set value */
#define TIM_Encoder1_Set  0x0001
#define TIM_Encoder2_Set  0x0002
#define TIM_Encoder3_Set  0x0003

/* TIM Slave Mode Enable Set/Reset value */
#define TIM_SME_Reset  0x731B
#define TIM_SME_Set    0x0004

/* TIM Internal Trigger Selection value */
#define TIM_ITS_TIM0  0x1000
#define TIM_ITS_TIM1  0x2000
#define TIM_ITS_TIM2  0x3000
#define TIM_ITS_PWM   0x4000

/* TIM Trigger Selection value */
#define TIM_TS_IC1_Set  0x0200
#define TIM_TS_IC2_Set  0x0300

/* TIM Slave Mode selction external clock Set value */
#define TIM_SMS_EXTCLK_Set    0x0008
#define TIM_SMS_RESETCLK_Set  0x0000

/* TIM_CR Masks bit */
#define TIM_DBASE_Mask                0x077F
#define TIM_MasterModeSelection_Mask  0xFC7F
#define TIM_CounterMode_Mask          0xFF8F

/* TIM Update flag selection Set/Reset value */
#define TIM_UFS_Reset  0xFFFE
#define TIM_UFS_Set    0x0001

/* TIM Counter value */
#define TIM_COUNTER_Reset  0x0002
#define TIM_COUNTER_Start  0x0004
#define TIM_COUNTER_Stop   0xFFFB

/* TIM One pulse Mode set value */
#define TIM_OPM_Set    0x0008
#define TIM_OPM_Reset  0xFFF7

/* TIM Debug Mode Set/Reset value */
#define TIM_DBGC_Set    0x0400
#define TIM_DBGC_Reset  0xFB7F

/* TIM Input Capture Enable/Disable value */
#define TIM_IC1_Enable  0x0004
#define TIM_IC2_Enable  0x0010

/* TIM Input Capture Polarity Set/Reset value */
#define TIM_IC1P_Set    0x0008
#define TIM_IC2P_Set    0x0020
#define TIM_IC1P_Reset  0x0037
#define TIM_IC2P_Reset  0x001F

/* TIM Output Compare Polarity Set/Reset value */
#define TIM_OC1P_Set    0x0020
#define TIM_OC2P_Set    0x2000
#define TIM_OC1P_Reset  0x3F1F
#define TIM_OC2P_Reset  0x1F3F

/* TIM Output Compare control mode constant */
#define TIM_OCControl_PWM         0x000C
#define TIM_OCControl_OCToggle    0x0006
#define TIM_OCControl_OCInactive  0x0004
#define TIM_OCControl_OCActive    0x0002
#define TIM_OCControl_OCTiming    0x0000

/* TIM Output Compare mode Enable value */
#define TIM_OC1_Enable  0x0010
#define TIM_OC2_Enable  0x1000

/* TIM Output Compare mode Mask value */
#define TIM_OC1C_Mask  0x3F31
#define TIM_OC2C_Mask  0x313F

/* TIM Preload bit Set/Reset value */
#define TIM_PLD1_Set    0x0001
#define TIM_PLD1_Reset  0xFFFE

#define TIM_PLD2_Set    0x0100
#define TIM_PLD2_Reset  0xFEFF

/* TIM OCRM Set/Reset value */
#define TIM_OCRM_Set    0x0080
#define TIM_OCRM_Reset  0x030D

/* Reset Register Masks */
#define TIM_Pulse2_Reset_Mask     0x0000
#define TIM_Prescaler_Reset_Mask  0x0000
#define TIM_Pulse1_Reset_Mask     0x0000
#define TIM_Period_Reset_Mask     0xFFFF
#define TIM_Counter_Reset         0x0002

/* Private function prototypes -----------------------------------------------*/
static void ICAP_ModuleConfig(TIM_TypeDef* TIMx, TIM_InitTypeDef* TIM_InitStruct);
static void Encoder_ModeConfig(TIM_TypeDef* TIMx, TIM_InitTypeDef* TIM_InitStruct);
static void OCM_ModuleConfig(TIM_TypeDef* TIMx, TIM_InitTypeDef* TIM_InitStruct);

/* Private functions ---------------------------------------------------------*/

/******************************************************************************
* Function Name  : TIM_DeInit
* Description    : Deinitializes TIM peripheral registers to their default reset
*                  values.
* Input          : TIMx: where x can be 0, 1 or 2 to select the TIM peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_DeInit(TIM_TypeDef *TIMx)
{ 
  if(TIMx == TIM0)
  {
    MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TIM0,ENABLE);
    MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TIM0,DISABLE);
  }
  else if(TIMx == TIM1)
  {
    MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TIM1,ENABLE);
    MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TIM1,DISABLE);
  }
  else if(TIMx == TIM2)
  {
    MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TIM2,ENABLE);
    MRCC_PeripheralSWResetConfig(MRCC_Peripheral_TIM2,DISABLE);
  }
}

/*******************************************************************************
* Function Name  : TIM_Init
* Description    : Initializes the TIMx peripheral according to the specified
*                  parameters in the TIM_InitStruct .
* Input          : - TIMx: where x can be 0, 1 or 2 to select the TIM peripheral.
*                  - TIM_InitStruct: pointer to a TIM_InitTypeDef structure that
*                    contains the configuration information for the specified TIM
*                    peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_Init(TIM_TypeDef* TIMx, TIM_InitTypeDef* TIM_InitStruct)
{
  /* Set the prescaler value */
  TIMx->PSC = TIM_InitStruct->TIM_Prescaler;

  /* Select the clock source */
  TIM_ClockSourceConfig(TIMx, TIM_InitStruct->TIM_ClockSource,
                           TIM_InitStruct->TIM_ExtCLKEdge);

  /* Select the counter mode */
  TIMx->CR &= TIM_CounterMode_Mask;
  TIMx->CR |= TIM_InitStruct->TIM_CounterMode;

  /* Set the period value */
  TIMx->ARR = TIM_InitStruct->TIM_Period;

  switch(TIM_InitStruct->TIM_Mode)
  {
    case TIM_Mode_OCTiming: case TIM_Mode_OCActive: case TIM_Mode_OCInactive:
    case TIM_Mode_OCToggle: case TIM_Mode_PWM:
      OCM_ModuleConfig(TIMx, TIM_InitStruct);
    break;

    case TIM_Mode_PWMI: case TIM_Mode_IC:
      ICAP_ModuleConfig(TIMx, TIM_InitStruct);
    break;

    case TIM_Mode_Encoder1: case TIM_Mode_Encoder2: case TIM_Mode_Encoder3:
      Encoder_ModeConfig(TIMx, TIM_InitStruct);
    break;

    case TIM_Mode_OPM_PWM: case TIM_Mode_OPM_Toggle: case TIM_Mode_OPM_Active:

      /* Output module configuration */
      OCM_ModuleConfig(TIMx, TIM_InitStruct);

      /* Input module configuration */
      ICAP_ModuleConfig(TIMx, TIM_InitStruct);
      
      /* Set the slave mode to trigger Mode */
      TIMx->SCR |= TIM_SynchroMode_Trigger;

      /* Repetitive pulse state selection */
      if(TIM_InitStruct->TIM_RepetitivePulse == TIM_RepetitivePulse_Disable)
      {
        TIMx->CR |= TIM_OPM_Set;
      }
      else
      {
        TIMx->CR &= TIM_OPM_Reset;
      }
    break;

    default:
    break;
  }
}

/*******************************************************************************
* Function Name  : TIM_StructInit
* Description    : Fills each TIM_InitStruct member with its default value.
* Input          : TIM_InitStruct : pointer to a TIM_InitTypeDef structure
*                  which will be initialized.
* Output         : None                        
* Return         : None.
*******************************************************************************/
void TIM_StructInit(TIM_InitTypeDef *TIM_InitStruct)
{
  /* Set the default configuration */
  TIM_InitStruct->TIM_Mode = TIM_Mode_OCTiming;
  TIM_InitStruct->TIM_Prescaler = TIM_Prescaler_Reset_Mask;
  TIM_InitStruct->TIM_ClockSource = TIM_ClockSource_Internal;
  TIM_InitStruct->TIM_ExtCLKEdge = TIM_ExtCLKEdge_Rising;
  TIM_InitStruct->TIM_CounterMode = TIM_CounterMode_Up;
  TIM_InitStruct->TIM_Period = TIM_Period_Reset_Mask;
  TIM_InitStruct->TIM_Channel = TIM_Channel_ALL;
  TIM_InitStruct->TIM_Pulse1 = TIM_Pulse1_Reset_Mask;
  TIM_InitStruct->TIM_Pulse2 = TIM_Pulse2_Reset_Mask;
  TIM_InitStruct->TIM_RepetitivePulse = TIM_RepetitivePulse_Disable;
  TIM_InitStruct->TIM_Polarity1 = TIM_Polarity1_Low;
  TIM_InitStruct->TIM_Polarity2 = TIM_Polarity2_Low;
  TIM_InitStruct->TIM_IC1Selection = TIM_IC1Selection_TI1;
  TIM_InitStruct->TIM_IC2Selection = TIM_IC2Selection_TI1;
  TIM_InitStruct->TIM_IC1Polarity = TIM_IC1Polarity_Rising;
  TIM_InitStruct->TIM_IC2Polarity = TIM_IC2Polarity_Rising;
  TIM_InitStruct->TIM_PWMI_ICSelection = TIM_PWMI_ICSelection_TI1;
  TIM_InitStruct->TIM_PWMI_ICPolarity = TIM_PWMI_ICPolarity_Rising;
}

/*******************************************************************************
* Function Name  : TIM_Cmd
* Description    : Enables or disables the specified TIM peripheral.
* Input          : - TIMx: where x can be 0, 1 or 2 to select the TIM peripheral.
*                  - Newstate: new state of the TIMx peripheral.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_Cmd(TIM_TypeDef *TIMx, FunctionalState Newstate)
{
 if(Newstate == ENABLE)
  { 
    TIMx->CR |= TIM_COUNTER_Start;
  }
  else
  {
    TIMx->CR &= TIM_COUNTER_Stop;
  }
}

/*******************************************************************************
* Function Name  : TIM_ITConfig
* Description    : Enables or disables the TIM interrupts.
* Input          : - TIMx: where x can be 0, 1 or 2 to select the TIM peripheral.
*                  - TIM_IT: specifies the TIM interrupts sources to be enabled
*                    or disabled.
*                    This parameter can be any combination of the following values:
*                         - TIM_IT_IC1: Input Capture 1 Interrupt 
*                         - TIM_IT_OC1: Output Compare 1 Interrupt 
*                         - TIM_IT_Update: Timer update Interrupt 
*                         - TIM_IT_GlobalUpdate: Timer global update Interrupt 
*                         - TIM_IT_IC2: Input Capture 2 Interrupt 
*                         - TIM_IT_OC2: Output Compare 2 Interrupt 
*                  - Newstate: new state of the specified TIMx interrupts. 
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void TIM_ITConfig(TIM_TypeDef *TIMx, u16 TIM_IT, FunctionalState Newstate)
{ 
  u16 TIM_IT_Enable = 0;

  TIM_IT_Enable = TIM_IT & TIM_IT_Enable_Mask;

  if(Newstate == ENABLE)
  {
    /* Update interrupt global source: overflow/undeflow, counter reset operation
    or slave mode controller in reset mode */
    if((TIM_IT & TIM_IT_GlobalUpdate) == TIM_IT_GlobalUpdate)
    {
      TIMx->CR &= TIM_UFS_Reset;
    }
    /* Update interrupt source: counter overflow/underflow */
    else if((TIM_IT & TIM_IT_Update) == TIM_IT_Update)
    {
      TIMx->CR |= TIM_UFS_Set;
    }
    /* Select and enable the interrupts requests */
    TIMx->RSR |= TIM_IT_Enable;
    TIMx->RER |= TIM_IT_Enable;
  }
  /* Disable the interrupts requests */
  else
  {
    TIMx->RSR &= ~TIM_IT_Enable;
    TIMx->RER &= ~TIM_IT_Enable;
  }
}

/*******************************************************************************
* Function Name  : TIM_PreloadConfig
* Description    : Enables or disables TIM peripheral Preload register on OCRx.
* Input          : - TIMx: where x can be 0, 1 or 2 to select the TIM peripheral.
*                  - TIM_Channel: specifies the TIM channel to be used.
*                    This parameter can be one of the following values:
*                         - TIM_Channel_1: TIM Channel 1 is used
*                         - TIM_Channel_2: TIM Channel 2 is used
*                         - TIM_Channel_ALL: TIM Channel 1and 2 are used
*                  - Newstate: new state of the TIMx peripheral Preload register
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None