stm32l1xx_tim.c

VS1003_MP3_SPI_SDHC_FAT32

  */
void TIM_SetCounter(TIM_TypeDef* TIMx, uint32_t Counter)
{
  /* Check the parameters */
   assert_param(IS_TIM_ALL_PERIPH(TIMx));
   
  /* Set the Counter Register value */
  TIMx->CNT = Counter;
}

/**
  * @brief  Sets the TIMx Autoreload Register value
  * @param  TIMx: where x can be 2 to 11 to select the TIM peripheral.
  * @param  Autoreload: specifies the Autoreload register new value.
  * @retval None
  */
void TIM_SetAutoreload(TIM_TypeDef* TIMx, uint32_t Autoreload)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  
  /* Set the Autoreload Register value */
  TIMx->ARR = Autoreload;
}

/**
  * @brief  Gets the TIMx Counter value.
  * @param  TIMx: where x can be 2 to 11 to select the TIM peripheral.
  * @retval Counter Register value.
  */
uint32_t TIM_GetCounter(TIM_TypeDef* TIMx)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  
  /* Get the Counter Register value */
  return TIMx->CNT;
}

/**
  * @brief  Gets the TIMx Prescaler value.
  * @param  TIMx: where x can be 2 to 11 to select the TIM peripheral.
  * @retval Prescaler Register value.
  */
uint16_t TIM_GetPrescaler(TIM_TypeDef* TIMx)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  
  /* Get the Prescaler Register value */
  return TIMx->PSC;
}

/**
  * @brief  Enables or Disables the TIMx Update event.
  * @param  TIMx: where x can be 2 to 11 to select the TIM peripheral.
  * @param  NewState: new state of the TIMx UDIS bit
  *   This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void TIM_UpdateDisableConfig(TIM_TypeDef* TIMx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  if (NewState != DISABLE)
  {
    /* Set the Update Disable Bit */
    TIMx->CR1 |= TIM_CR1_UDIS;
  }
  else
  {
    /* Reset the Update Disable Bit */
    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_UDIS);
  }
}

/**
  * @brief  Configures the TIMx Update Request Interrupt source.
  * @param  TIMx: where x can be 2 to 11 to select the TIM peripheral.
  * @param  TIM_UpdateSource: specifies the Update source.
  *   This parameter can be one of the following values:
  *     @arg TIM_UpdateSource_Global: Source of update is the counter overflow/underflow
                                       or the setting of UG bit, or an update generation
                                       through the slave mode controller.
  *     @arg TIM_UpdateSource_Regular: Source of update is counter overflow/underflow.
  * @retval None
  */
void TIM_UpdateRequestConfig(TIM_TypeDef* TIMx, uint16_t TIM_UpdateSource)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_TIM_UPDATE_SOURCE(TIM_UpdateSource));
  
  if (TIM_UpdateSource != TIM_UpdateSource_Global)
  {
    /* Set the URS Bit */
    TIMx->CR1 |= TIM_CR1_URS;
  }
  else
  {
    /* Reset the URS Bit */
    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_URS);
  }
}

/**
  * @brief  Enables or disables TIMx peripheral Preload register on ARR.
  * @param  TIMx: where x can be  2 to 11 to select the TIM peripheral.
  * @param  NewState: new state of the TIMx peripheral Preload register
  *   This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void TIM_ARRPreloadConfig(TIM_TypeDef* TIMx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  if (NewState != DISABLE)
  {
    /* Set the ARR Preload Bit */
    TIMx->CR1 |= TIM_CR1_ARPE;
  }
  else
  {
    /* Reset the ARR Preload Bit */
    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_ARPE);
  }
}

/**
  * @brief  Selects the TIMx's One Pulse Mode.
  * @param  TIMx: where x can be 2 to 11 to select the TIM peripheral.
  * @param  TIM_OPMode: specifies the OPM Mode to be used.
  *   This parameter can be one of the following values:
  *     @arg TIM_OPMode_Single:: TIM One Pulse Single Mode (Counter stops counting 
  *                              at the next update event (clearing the bit CEN)).
  *     @arg TIM_OPMode_Repetitive: TIM One Pulse Repetitive Mode 
  *                                 (Counter is not stopped at update event).
  * @retval None
  */
void TIM_SelectOnePulseMode(TIM_TypeDef* TIMx, uint16_t TIM_OPMode)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_TIM_OPM_MODE(TIM_OPMode));
  
  /* Reset the OPM Bit */
  TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_OPM);
  /* Configure the OPM Mode */
  TIMx->CR1 |= TIM_OPMode;
}

/**
  * @brief  Sets the TIMx Clock Division value.
  * @param  TIMx: where x can be  2, 3, 4, 5, 9, 10 or 11 to select the TIM peripheral.
  * @param  TIM_CKD: specifies the clock division value.
  *   This parameter can be one of the following value:
  *     @arg TIM_CKD_DIV1: TDTS = Tck_tim.
  *     @arg TIM_CKD_DIV2: TDTS = 2*Tck_tim.
  *     @arg TIM_CKD_DIV4: TDTS = 4*Tck_tim.
  * @retval None
  */
void TIM_SetClockDivision(TIM_TypeDef* TIMx, uint16_t TIM_CKD)
{
  /* Check the parameters */
  assert_param(IS_TIM_LIST1_PERIPH(TIMx));
  assert_param(IS_TIM_CKD_DIV(TIM_CKD));
  
  /* Reset the CKD Bits */
  TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_CKD);
  /* Set the CKD value */
  TIMx->CR1 |= TIM_CKD;
}

/**
  * @brief  Enables or disables the specified TIM peripheral.
  * @param  TIMx: where x can be 2 to 11 to select the TIMx peripheral.
  * @param  NewState: new state of the TIMx peripheral.
  *         This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void TIM_Cmd(TIM_TypeDef* TIMx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx)); 
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  if (NewState != DISABLE)
  {
    /* Enable the TIM Counter */
    TIMx->CR1 |= TIM_CR1_CEN;
  }
  else
  {
    /* Disable the TIM Counter */
    TIMx->CR1 &= (uint16_t)(~((uint16_t)TIM_CR1_CEN));
  }
}

/**
  * @}
  */

/** @defgroup TIM_Group2 Output Compare management functions
 *  @brief    Output Compare management functions 
 *
@verbatim
 ===============================================================================
                ##### Output Compare management functions #####
 ===============================================================================
        *** TIM Driver: how to use it in Output Compare Mode ***
 ===============================================================================
    [..] To use the Timer in Output Compare mode, the following steps are mandatory:
         (#) Enable TIM clock using 
             RCC_APBxPeriphClockCmd(RCC_APBxPeriph_TIMx, ENABLE) function.
         (#) Configure the TIM pins by configuring the corresponding GPIO pins
         (#) Configure the Time base unit as described in the first part of this 
             driver, if needed, else the Timer will run with the default 
             configuration:
             (++) Autoreload value = 0xFFFF.
             (++) Prescaler value = 0x0000.
             (++) Counter mode = Up counting.
             (++) Clock Division = TIM_CKD_DIV1.
         (#) Fill the TIM_OCInitStruct with the desired parameters including:
             (++) The TIM Output Compare mode: TIM_OCMode.
             (++) TIM Output State: TIM_OutputState.
             (++) TIM Pulse value: TIM_Pulse.
             (++) TIM Output Compare Polarity : TIM_OCPolarity.
         (#) Call TIM_OCxInit(TIMx, &TIM_OCInitStruct) to configure the desired 
             channel with the corresponding configuration.
         (#) Call the TIM_Cmd(ENABLE) function to enable the TIM counter.
    [..]
        (@) All other functions can be used separately to modify, if needed,
          a specific feature of the Timer.
        (@) In case of PWM mode, this function is mandatory:
            TIM_OCxPreloadConfig(TIMx, TIM_OCPreload_ENABLE).
        (@) If the corresponding interrupt or DMA request are needed, the user should:
            (#@) Enable the NVIC (or the DMA) to use the TIM interrupts (or DMA requests).
            (#@) Enable the corresponding interrupt (or DMA request) using the function
                 TIM_ITConfig(TIMx, TIM_IT_CCx) (or TIM_DMA_Cmd(TIMx, TIM_DMA_CCx)).

@endverbatim
  * @{
  */

/**
  * @brief  Initializes the TIMx Channel1 according to the specified
  *         parameters in the TIM_OCInitStruct.
  * @param  TIMx: where x can be 2, 3, 4, 5, 9, 10 or 11 to select the TIM peripheral.
  * @param  TIM_OCInitStruct: pointer to a TIM_OCInitTypeDef structure
  *         that contains the configuration information for the specified TIM 
  *         peripheral.
  * @retval None
  */
void TIM_OC1Init(TIM_TypeDef* TIMx, TIM_OCInitTypeDef* TIM_OCInitStruct)
{
  uint16_t tmpccmrx = 0, tmpccer = 0;
   
  /* Check the parameters */
  assert_param(IS_TIM_LIST1_PERIPH(TIMx));
  assert_param(IS_TIM_OC_MODE(TIM_OCInitStruct->TIM_OCMode));
  assert_param(IS_TIM_OUTPUT_STATE(TIM_OCInitStruct->TIM_OutputState));
  assert_param(IS_TIM_OC_POLARITY(TIM_OCInitStruct->TIM_OCPolarity));   
  /* Disable the Channel 1: Reset the CC1E Bit */
  TIMx->CCER &= (uint16_t)(~(uint16_t)TIM_CCER_CC1E);
  
  /* Get the TIMx CCER register value */
  tmpccer = TIMx->CCER;
  
  /* Get the TIMx CCMR1 register value */
  tmpccmrx = TIMx->CCMR1;
    
  /* Reset the Output Compare Mode Bits */
  tmpccmrx &= (uint16_t)(~((uint16_t)TIM_CCMR1_OC1M));
  tmpccmrx &= (uint16_t)(~((uint16_t)TIM_CCMR1_CC1S));
  
  /* Select the Output Compare Mode */
  tmpccmrx |= TIM_OCInitStruct->TIM_OCMode;
  
  /* Reset the Output Polarity level */
  tmpccer &= (uint16_t)(~((uint16_t)TIM_CCER_CC1P));
  /* Set the Output Compare Polarity */
  tmpccer |= TIM_OCInitStruct->TIM_OCPolarity;
  
  /* Set the Output State */
  tmpccer |= TIM_OCInitStruct->TIM_OutputState;
  
  /* Set the Capture Compare Register value */
  TIMx->CCR1 = TIM_OCInitStruct->TIM_Pulse;
  
  /* Write to TIMx CCMR1 */
  TIMx->CCMR1 = tmpccmrx;
  
  /* Write to TIMx CCER */
  TIMx->CCER = tmpccer;
}

/**
  * @brief  Initializes the TIMx Channel2 according to the specified
  *         parameters in the TIM_OCInitStruct.
  * @param  TIMx: where x can be 2, 3, 4, 5 or 9 to select the TIM peripheral.
  * @param  TIM_OCInitStruct: pointer to a TIM_OCInitTypeDef structure
  *         that contains the configuration information for the specified TIM 
  *         peripheral.
  * @retval None
  */
void TIM_OC2Init(TIM_TypeDef* TIMx, TIM_OCInitTypeDef* TIM_OCInitStruct)
{
  uint16_t tmpccmrx = 0, tmpccer = 0;
   
  /* Check the parameters */
  assert_param(IS_TIM_LIST2_PERIPH(TIMx)); 
  assert_param(IS_TIM_OC_MODE(TIM_OCInitStruct->TIM_OCMode));
  assert_param(IS_TIM_OUTPUT_STATE(TIM_OCInitStruct->TIM_OutputState));
  assert_param(IS_TIM_OC_POLARITY(TIM_OCInitStruct->TIM_OCPolarity));   
  /* Disable the Channel 2: Reset the CC2E Bit */
  TIMx->CCER &= (uint16_t)(~((uint16_t)TIM_CCER_CC2E));
  
  /* Get the TIMx CCER register value */  
  tmpccer = TIMx->CCER;
  
  /* Get the TIMx CCMR1 register value */
  tmpccmrx = TIMx->CCMR1;
    
  /* Reset the Output Compare Mode Bits */
  tmpccmrx &= (uint16_t)(~((uint16_t)TIM_CCMR1_OC2M));
  
  /* Select the Output Compare Mode */
  tmpccmrx |= (uint16_t)(TIM_OCInitStruct->TIM_OCMode << 8);
  
  /* Reset the Output Polarity level */
  tmpccer &= (uint16_t)(~((uint16_t)TIM_CCER_CC2P));
  /* Set the Output Compare Polarity */
  tmpccer |= (uint16_t)(TIM_OCInitStruct->TIM_OCPolarity << 4);
  
  /* Set the Output State */
  tmpccer |= (uint16_t)(TIM_OCInitStruct->TIM_OutputState << 4);
  
  /* Set the Capture Compare Register value */
  TIMx->CCR2 = TIM_OCInitStruct->TIM_Pulse;
    
  /* Write to TIMx CCMR1 */
  TIMx->CCMR1 = tmpccmrx;
  
  /* Write to TIMx CCER */
  TIMx->CCER = tmpccer;
}

/**
  * @brief  Initializes the TIMx Channel3 according to the specified