stm8s_tim4.c

按键是比较复杂。可以用状态机表示。 每10mS执行一次键盘扫描任务 0、无键

/**
  ******************************************************************************
  * @file stm8s_tim4.c
  * @brief This file contains all the functions for the TIM4 peripheral.
  * @author STMicroelectronics - MCD Application Team
  * @version V1.1.0
  * @date 02/27/2009
  ******************************************************************************
  *
  * THE PRESENT FIRMWARE 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 FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  * @image html logo.bmp
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm8s_tim4.h"

/* LINKER SECTIONS DEFINITION FOR THIS FILE ONLY */
#ifdef USE_COSMIC_SECTIONS
#pragma section (TIM4_CODE)
#pragma section const {TIM4_CONST}
#pragma section @near [TIM4_URAM]
#pragma section @near {TIM4_IRAM}
#pragma section @tiny [TIM4_UZRAM]
#pragma section @tiny {TIM4_IZRAM}
#endif

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/**
  * @addtogroup TIM4_Public_Functions
  * @{
  */

/**
  * @brief Deinitializes the TIM4 peripheral registers to their default reset values.
  * @param[in] :
  * None
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_DeInit(void)
{
  TIM4->CR1 = TIM4_CR1_RESET_VALUE;
  TIM4->IER = TIM4_IER_RESET_VALUE;
  TIM4->CNTR = TIM4_CNTR_RESET_VALUE;
  TIM4->PSCR = TIM4_PSCR_RESET_VALUE;
  TIM4->ARR = TIM4_ARR_RESET_VALUE;
  TIM4->SR1 = TIM4_SR1_RESET_VALUE;
}

/**
  * @brief Initializes the TIM4 Time Base Unit according to the specified parameters.
  * @param[in]  TIM4_Prescaler specifies the Prescaler from TIM4_Prescaler_TypeDef.
  * @param[in]  TIM4_Period specifies the Period value.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_TimeBaseInit(TIM4_Prescaler_TypeDef TIM4_Prescaler, u8 TIM4_Period)
{
  /* Check TIM4 prescaler value */
  assert_param(IS_TIM4_PRESCALER_OK(TIM4_Prescaler));
  /* Set the Prescaler value */
  TIM4->PSCR = (u8)(TIM4_Prescaler);
  /* Set the Autoreload value */
  TIM4->ARR = (u8)(TIM4_Period);
}



/**
  * @brief Enables or disables the TIM4 peripheral.
  * @param[in] NewState new state of the TIM4 peripheral. This parameter can
  * be ENABLE or DISABLE.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_Cmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  /* set or Reset the CEN Bit */
  if (NewState != DISABLE)
  {
    TIM4->CR1 |= TIM4_CR1_CEN;
  }
  else
  {
    TIM4->CR1 &= (u8)(~TIM4_CR1_CEN);
  }
}

/**
  * @brief Enables or disables the specified TIM4 interrupts.
  * @param[in] NewState new state of the TIM4 peripheral.
  * This parameter can be: ENABLE or DISABLE.
  * @param[in] TIM4_IT specifies the TIM4 interrupts sources to be enabled or disabled.
  * This parameter can be any combination of the following values:
  *                       - TIM4_IT_UPDATE: TIM4 update Interrupt source
  * @param[in] NewState new state of the TIM4 peripheral.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_ITConfig(TIM4_IT_TypeDef TIM4_IT, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_TIM4_IT_OK(TIM4_IT));
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the Interrupt sources */
    TIM4->IER |= (u8)TIM4_IT;
  }
  else
  {
    /* Disable the Interrupt sources */
    TIM4->IER &= (u8)(~TIM4_IT);
  }
}

/**
  * @brief Enables or Disables the TIM4 Update event.
  * @param[in] NewState new state of the TIM4 peripheral Preload register. This parameter can
  * be ENABLE or DISABLE.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_UpdateDisableConfig(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  /* Set or Reset the UDIS Bit */
  if (NewState != DISABLE)
  {
    TIM4->CR1 |= TIM4_CR1_UDIS;
  }
  else
  {
    TIM4->CR1 &= (u8)(~TIM4_CR1_UDIS);
  }
}

/**
  * @brief Selects the TIM4 Update Request Interrupt source.
  * @param[in] TIM4_UpdateSource specifies the Update source.
  * This parameter can be one of the following values
  *                       - TIM4_UPDATESOURCE_REGULAR
  *                       - TIM4_UPDATESOURCE_GLOBAL
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_UpdateRequestConfig(TIM4_UpdateSource_TypeDef TIM4_UpdateSource)
{
  /* Check the parameters */
  assert_param(IS_TIM4_UPDATE_SOURCE_OK(TIM4_UpdateSource));

  /* Set or Reset the URS Bit */
  if (TIM4_UpdateSource != TIM4_UPDATESOURCE_GLOBAL)
  {
    TIM4->CR1 |= TIM4_CR1_URS;
  }
  else
  {
    TIM4->CR1 &= (u8)(~TIM4_CR1_URS);
  }
}

/**
  * @brief Selects the TIM4抯 One Pulse Mode.
  * @param[in] TIM4_OPMode specifies the OPM Mode to be used.
  * This parameter can be one of the following values
  *                    - TIM4_OPMODE_SINGLE
  *                    - TIM4_OPMODE_REPETITIVE
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_SelectOnePulseMode(TIM4_OPMode_TypeDef TIM4_OPMode)
{
  /* Check the parameters */
  assert_param(IS_TIM4_OPM_MODE_OK(TIM4_OPMode));

  /* Set or Reset the OPM Bit */
  if (TIM4_OPMode != TIM4_OPMODE_REPETITIVE)
  {
    TIM4->CR1 |= TIM4_CR1_OPM;
  }
  else
  {
    TIM4->CR1 &= (u8)(~TIM4_CR1_OPM);
  }

}

/**
  * @brief Configures the TIM4 Prescaler.
  * @param[in] Prescaler specifies the Prescaler Register value
  * This parameter can be one of the following values
  *                       -  TIM4_PRESCALER_1
  *                       -  TIM4_PRESCALER_2
  *                       -  TIM4_PRESCALER_4
  *                       -  TIM4_PRESCALER_8
  *                       -  TIM4_PRESCALER_16
  *                       -  TIM4_PRESCALER_32
  *                       -  TIM4_PRESCALER_64
  *                       -  TIM4_PRESCALER_128
  * @param[in] TIM4_PSCReloadMode specifies the TIM4 Prescaler Reload mode.
  * This parameter can be one of the following values
  *                       - TIM4_PSCRELOADMODE_IMMEDIATE: The Prescaler is loaded
  *                         immediatly.
  *                       - TIM4_PSCRELOADMODE_UPDATE: The Prescaler is loaded at
  *                         the update event.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_PrescalerConfig(TIM4_Prescaler_TypeDef Prescaler, TIM4_PSCReloadMode_TypeDef TIM4_PSCReloadMode)
{
  /* Check the parameters */
  assert_param(IS_TIM4_PRESCALER_RELOAD_OK(TIM4_PSCReloadMode));
  assert_param(IS_TIM4_PRESCALER_OK(Prescaler));

  /* Set the Prescaler value */
  TIM4->PSCR = (u8)Prescaler;

  /* Set or reset the UG Bit */
  TIM4->EGR = (u8)TIM4_PSCReloadMode;
}

/**
  * @brief Enables or disables TIM4 peripheral Preload register on ARR.
  * @param[in] NewState new state of the TIM4 peripheral Preload register.
  * This parameter can be ENABLE or DISABLE.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_ARRPreloadConfig(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  /* Set or Reset the ARPE Bit */
  if (NewState != DISABLE)
  {
    TIM4->CR1 |= TIM4_CR1_ARPE;
  }
  else
  {
    TIM4->CR1 &= (u8)(~TIM4_CR1_ARPE);
  }
}

/**
  * @brief Configures the TIM4 event to be generated by software.
  * @param[in] TIM4_EventSource specifies the event source.
  * This parameter can be one of the following values:
  *                       - TIM4_EVENTSOURCE_UPDATE: TIM4 update Event source
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_GenerateEvent(TIM4_EventSource_TypeDef TIM4_EventSource)
{
  /* Check the parameters */
  assert_param(IS_TIM4_EVENT_SOURCE_OK(TIM4_EventSource));

  /* Set the event sources */
  TIM4->EGR = (u8)(TIM4_EventSource);
}


/**
  * @brief Sets the TIM4 Counter Register value.
  * @param[in] Counter specifies the Counter register new value.
  * This parameter is between 0x00 and 0xFF.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_SetCounter(u8 Counter)
{
  /* Set the Counter Register value */
  TIM4->CNTR = (u8)(Counter);
}


/**
  * @brief Sets the TIM4 Autoreload Register value.
  * @param[in] Autoreload specifies the Autoreload register new value.
  * This parameter is between 0x00 and 0xFF.
  * @retval None
  * @par Required preconditions:
  * None
  */
void TIM4_SetAutoreload(u8 Autoreload)
{
  /* Set the Autoreload Register value */
  TIM4->ARR = (u8)(Autoreload);
}

/**
  * @brief Gets the TIM4 Counter value.
  * @param[in] :
  * None
  * @retval Counter Register value.
  * @par Required preconditions:
  * None
  */
u8 TIM4_GetCounter(void)
{
  /* Get the Counter Register value */
  return (u8)(TIM4->CNTR);
}

/**
  * @brief Gets the TIM4 Prescaler value.
  * @param[in] :
  * None
  * @retval Prescaler Register configuration value.
  * @par Required preconditions:
  * None
  */
TIM4_Prescaler_TypeDef TIM4_GetPrescaler(void)
{
  /* Get the Prescaler Register value */
  return (TIM4_Prescaler_TypeDef)(TIM4->PSCR);
}

/**
  * @brief Checks whether the specified TIM4 flag is set or not.
  * @param[in] TIM4_FLAG specifies the flag to check.
  * This parameter can be one of the following values:
  *                       - TIM4_FLAG_UPDATE: TIM4 update Flag
  * @retval FlagStatus The new state of TIM4_FLAG (SET or RESET).
  * @par Required preconditions:
  * None
  */
FlagStatus TIM4_GetFlagStatus(TIM4_FLAG_TypeDef TIM4_FLAG)
{
  /* Check the parameters */
  assert_param(IS_TIM4_GET_FLAG_OK(TIM4_FLAG));

  if ((TIM4->SR1 & TIM4_FLAG) != RESET )
  {
    return (FlagStatus)(SET);
  }
  else
  {
    return (FlagStatus)(RESET);
  }
}

/**
  * @brief Clears the TIM4抯 pending flags.
  * @param[in] TIM4_FLAG specifies the flag to clear.
  * This parameter can be one of the following values:
  *                       - TIM4_FLAG_UPDATE: TIM4 update Flag
  * @retval None.
  * @par Required preconditions:
  * None
  */
void TIM4_ClearFlag(TIM4_FLAG_TypeDef TIM4_FLAG)
{
  /* Check the parameters */
  assert_param(IS_TIM4_GET_FLAG_OK(TIM4_FLAG));

  /* Clear the flags (rc_w0) clear this bit by writing 0. Writing