tim.c

Mouse for USB demo, based on STR710

/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
* File Name          : tim.c
* Author             : MCD Application Team
* Date First Issued  : 08/09/2003
* Description        : This file provides all the TIM software functions
********************************************************************************
* History:
*  03/07/03 : First Version
*******************************************************************************/

#include "tim.h"

/*******************************************************************************
* Function Name  : TIM_Init
* Description    : This routine is used to Initialize the TIM peripheral
* Input          : TIM Timer to Initialize
* Return         : None
*******************************************************************************/
void TIM_Init( TIM_TypeDef *TIMx )
{
  TIMx->CR1 = 0x0000;
  TIMx->CR2 = 0x0000;
  TIMx->SR  = 0x0000;
}

/*******************************************************************************
* Function Name  : TIM_ICAPModeConfig
* Description    : This routine is used to configure the input capture feature
* Input          : (1) TIM Timer
*                : (2) Input Capture Channel ( Channel_A or Channel_B )
*                : (3) Active Edge : Rising edge or Falling edge.
* Output         : None
*******************************************************************************/
void TIM_ICAPModeConfig ( TIM_TypeDef  *TIMx,
                          TIM_Channels Xchannel,
                          TIM_Clock_Edges  Xedge )
{
  switch (Xchannel)
  {
    case TIM_CHANNEL_A :
      if (Xedge == TIM_RISING) TIMx->CR1 |= TIM_IEDGA_Mask; else TIMx->CR1 &= ~TIM_IEDGA_Mask;
      break;
    case TIM_CHANNEL_B :
      if (Xedge == TIM_RISING) TIMx->CR1 |= TIM_IEDGB_Mask; else TIMx->CR1 &= ~TIM_IEDGB_Mask;
      break;
  }
}

/*******************************************************************************
* Function Name  : TIM_OCMPModeConfig
* Description    : This routine is used to configure the output compare feature
* Input          : (1) TIM Timer
*                : (2) OCMP Channel ( Channel_A or Channel_B )
*                : (3) Pulse Length
*                : (4) OC_Mode     : output wave, or only timing.
*                : (5) Level       : Rising edge or Falling edge after the ==
* Output         : None
*******************************************************************************/
void TIM_OCMPModeConfig (  TIM_TypeDef  *TIMx,
                           TIM_Channels Xchannel,
                           u16          XpulseLength,
                           TIM_OC_Modes     Xmode,
                           TIM_Logic_Levels Xlevel )
{
  u16 Tmp1 = 0x0000;
  u16 Tmp2 = TIMx->CR2;

  TIMx->CR2 = 0x0000;
  // Start The TIM Counter
  TIMx->CR1  = TIM_EN_Mask;
  // Update the CR2 Register
  TIMx->CR2  = Tmp2;
  switch ( Xmode )
  {
    case TIM_TIMING :
      // Output Compare Used only for Internal Timing Operation
      Tmp1 = Xchannel == TIM_CHANNEL_A ? Tmp1 & ~TIM_OCAE_Mask : Tmp1 & ~TIM_OCBE_Mask;
      break;
    case TIM_WAVE :
      // Output Compare Used for external wave generation
      Tmp1 = Xchannel == TIM_CHANNEL_A ? TIM_OCAE_Mask : TIM_OCBE_Mask;
      if ( Xlevel == TIM_HIGH )
        Tmp1 = Xchannel == TIM_CHANNEL_A ? Tmp1 | TIM_OLVLA_Mask  : Tmp1 | TIM_OLVLB_Mask;
      else
        Tmp1 = Xchannel == TIM_CHANNEL_A ? Tmp1 & ~TIM_OLVLA_Mask : Tmp1 & ~TIM_OLVLB_Mask;
      break;
  }
  if ( Xchannel == TIM_CHANNEL_A )
    TIMx->OCAR = ( XpulseLength - 5 );
  else
    TIMx->OCBR = ( XpulseLength - 5 );
    TIMx->CNTR = 0x0000;
    TIMx->CR1 |= Tmp1;
}

/*******************************************************************************
* Function Name  : TIM_OPModeConfig
* Description    : This routine is used to configure the one pulse mode
* Input          : (1) TIM Timer
*                : (3) XpulseLength      : Length of the pulse
*                : (4) Level1            : Level during the pulse
*                : (5) Level2            : Level after the pulse
*                : (6) Activation Edge   : High or Low on ICAP A
* Output         : None
*******************************************************************************/
void TIM_OPModeConfig ( TIM_TypeDef      *TIMx,
                        u16              XpulseLength,
                        TIM_Logic_Levels XLevel1,
                        TIM_Logic_Levels XLevel2,
                        TIM_Clock_Edges  Xedge )
{
  u16 Tmp = 0;

  // Set the Level During the pulse
  if (XLevel1 == TIM_HIGH) Tmp |= TIM_OLVLB_Mask;
  // Set the Level after After the pulse
  if (XLevel2 == TIM_HIGH) Tmp |= TIM_OLVLA_Mask;
  // Set the Activation Edge on the INCAP 1
  if (Xedge == TIM_RISING) Tmp |= TIM_IEDGA_Mask;
  // Set the Output Compare Function
  Tmp |= TIM_OCAE_Mask;
  // Set the One pulse mode
  Tmp |= TIM_OMP_Mask;
  // Update the CR1 register Value
  TIMx->CR1 = Tmp;
  // Set the Pulse length
  TIMx->OCAR = XpulseLength;
}

/*******************************************************************************
* Function Name  : TIM_PWMOModeConfig
* Description    : This routine is used to configure the PWM in output mode
* Input          : (1) TIM Timer
*                : (2) DutyCycle   : u16
*                : (3) Level 1     : During the Duty Cycle
*                : (4) Level 2     : During the after the pulse
*                : (5) Full period : u16
* Output         : None
*******************************************************************************/
void TIM_PWMOModeConfig ( TIM_TypeDef  *TIMx,
                          u16          XDutyCycle,
                          TIM_Logic_Levels XLevel1,
                          u16          XFullperiod,
                          TIM_Logic_Levels XLevel2
                        )
{
  u16 Tmp = TIMx->CR1;
  // Set the Level During the pulse
  Tmp = XLevel1 == TIM_HIGH  ? Tmp | TIM_OLVLB_Mask : Tmp & ~TIM_OLVLB_Mask;
  // Set the Level after After the pulse
  Tmp = XLevel2 == TIM_HIGH  ? Tmp | TIM_OLVLA_Mask : Tmp & ~TIM_OLVLA_Mask;
  // Set the OCAE
  Tmp |= TIM_OCAE_Mask;
  // Set the PWM Bit
  Tmp |= TIM_PWM_Mask;
  // Update the CR1
  TIMx->CR1 = Tmp;
  // Set the Duty Cycle value
  if ( XDutyCycle < 5 ) XDutyCycle = 5;
  TIMx->OCAR = XDutyCycle - 5;
  // Set the Full Period
  TIMx->OCBR = XFullperiod - 5;
}

/*******************************************************************************
* Function Name  : TIM_PWMInputConfig
* Description    : This routine is used to configure the PWM in input mode
* Input          : (1) TIM Timer
*                : (2) First Activation Edge
* Output         : None
*******************************************************************************/
void TIM_PWMIModeConfig ( TIM_TypeDef  *TIMx,  TIM_Clock_Edges  Xedge )
{
  u16 Tmp = TIMx->CR1;
  // Set the first edge Level
  Tmp = Xedge == TIM_RISING ? Tmp | TIM_IEDGA_Mask : Tmp & ~TIM_IEDGA_Mask;
  // Set the Second edge Level ( Opposit of the first level )
  Tmp = Xedge == TIM_FALLING ? Tmp | TIM_IEDGB_Mask : Tmp & ~TIM_IEDGB_Mask;
  // Set the PWM I Bit
  Tmp |= TIM_PWMI_Mask;
  // Update the CR1
  TIMx->CR1 = Tmp;
}

/*******************************************************************************
* Function Name  : TIM_PWMIValue
* Description    : This routine is used to get the PWMI values
* Input          : (1) TIM Timer
* Output         : PWMI_parameters : - u16 Dyty cycle
                                     - u16 Full period
*******************************************************************************/
PWMI_parameters TIM_PWMIValue (  TIM_TypeDef  *TIMx )
{
  PWMI_parameters Tmp;
  Tmp.Pulse  = TIMx->ICBR;
  Tmp.Period = TIMx->ICAR;
  return Tmp;
}

/*******************************************************************************
* Function Name  : TIM_PWMInputConfig
* Description    : This routine is used to configure the PWM in input mode
* Input          : (1) TIM Timer
*                : (2) First Activation Edge
* Output         : None
*******************************************************************************/
void TIM_CounterConfig ( TIM_TypeDef  *TIMx, TIM_CounterOperations Xoperation )
{
  switch ( Xoperation )
  {
    case TIM_START :
      TIMx->CR1 |= TIM_EN_Mask;
      break;
    case TIM_STOP :
      TIMx->CR1 &= ~TIM_EN_Mask;
      break;
    case TIM_CLEAR :
      TIMx->CNTR = 0x1234;
      break;
  }
}

/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/