stm8s_uart2.c

定时打铃控制器

    UART2->CR1 &= ((u8)~UART2_CR1_WAKE);
    UART2->CR1 |= (u8)UART2_WakeUp;
}

/**
  * @brief Determines if the UART2 is in mute mode or not.
  * @par Full description:
  * Determines if the UART2 is in mute mode or not.
  * @param[in] NewState: new state of the UART2 mode.
  * This parameter can be:
  * - ENABLE
  * - DISABLE
  * @retval None
  */
void UART2_ReceiverWakeUpCmd(FunctionalState NewState)
{
    assert_param(IS_FUNCTIONALSTATE_OK(NewState));

    if (NewState != DISABLE)
    {
        /* Enable the mute mode UART2 by setting the RWU bit in the CR2 register */
        UART2->CR2 |= UART2_CR2_RWU;
    }
    else
    {
        /* Disable the mute mode UART2 by clearing the RWU bit in the CR1 register */
        UART2->CR2 &= ((u8)~UART2_CR2_RWU);
    }
}


/**
  * @brief Returns the most recent received data by the UART2 peripheral.
  * @par Full description:
  * Returns the most recent received data by the UART2 peripheral.
  * @retval u16 Received Data
  * @par Required preconditions:
  * UART2_Cmd(ENABLE);
  */
u8 UART2_ReceiveData8(void)
{
    return ((u8)UART2->DR);
}

/**
  * @brief Returns the most recent received data by the UART2 peripheral.
  * @par Full description:
  * Returns the most recent received data by the UART2 peripheral.
  * @retval u16 Received Data
  * @par Required preconditions:
  * UART2_Cmd(ENABLE);
  */
u16 UART2_ReceiveData9(void)
{
    return (u16)((((u16)UART2->DR) | ((u16)(((u16)((u16)UART2->CR1 & (u16)UART2_CR1_R8)) << 1))) & ((u16)0x01FF));
}



/**
  * @brief Transmits 8 bit data through the UART2 peripheral.
  * @par Full description:
  * Transmits 8 bit data through the UART2 peripheral.
  * @param[in] Data: the data to transmit.
  * @retval None
  * @par Required preconditions:
  * UART2_Cmd(ENABLE);
  */
void UART2_SendData8(u8 Data)
{
    /* Transmit Data */
    UART2->DR = Data;
}

/**
  * @brief Transmits 9 bit data through the UART2 peripheral.
  * @par Full description:
  * Transmits 9 bit data through the UART2 peripheral.
  * @param[in] Data: the data to transmit.
  * @retval None
  * @par Required preconditions:
  * UART2_Cmd(ENABLE);
  */
void UART2_SendData9(u16 Data)
{
    UART2->CR1 &= ((u8)~UART2_CR1_T8);                  /* Clear the transmit data bit 8     */
    UART2->CR1 |= (u8)(((u8)(Data >> 2)) & UART2_CR1_T8); /* Write the transmit data bit [8]   */
    UART2->DR   = (u8)(Data);                    /* Write the transmit data bit [0:7] */

}
/**
  * @brief Transmits break characters.
  * @par Full description:
  * Transmits break characters on the UART2 peripheral.
  * @retval None
  */
void UART2_SendBreak(void)
{
    UART2->CR2 |= UART2_CR2_SBK;
}
/**
  * @brief Sets the address of the UART2 node.
  * @par Full description:
  * Sets the address of the UART2 node.
  * @param[in] UART2_Address: Indicates the address of the UART2 node.
  * @retval None
  */

void UART2_SetAddress(u8 UART2_Address)
{
    /*assert_param for x UART2_Address*/
    assert_param(IS_UART2_ADDRESS_OK(UART2_Address));

    /* Clear the UART2 address */
    UART2->CR4 &= ((u8)~UART2_CR4_ADD);
    /* Set the UART2 address node */
    UART2->CR4 |= UART2_Address;
}
/**
  * @brief Sets the specified UART2 guard time.
  * @par Full description:
  * Sets the address of the UART2 node.
  * @par This function is related to SmartCard mode.
  * @param[in] UART2_GuardTime: specifies the guard time.
  * @retval None
  * @par Required preconditions:
  * SmartCard Mode Enabled
  */
void UART2_SetGuardTime(u8 UART2_GuardTime)
{
    /* Set the UART2 guard time */
    UART2->GTR = UART2_GuardTime;
}

/**
  * @brief Sets the system clock prescaler.
  * @par Full description:
  * Sets the system clock prescaler.
  * @par This function is related to SmartCard and IrDa mode.
  * @param[in] UART2_Prescaler: specifies the prescaler clock.
  *                    This parameter can be one of the following values:
  *                       @par IrDA Low Power Mode
  *   The clock source is diveded by the value given in the register (8 bits)
  *                       - 0000 0000 Reserved
  *                       - 0000 0001 divides the clock source by 1
  *                       - 0000 0010 divides the clock source by 2
  *                       - ...........................................................
  *                       @par Smart Card Mode
  *   The clock source is diveded by the value given in the register (5 significant bits) multipied by 2
  *                       - 0 0000 Reserved
  *                       - 0 0001 divides the clock source by 2
  *                       - 0 0010 divides the clock source by 4
  *                       - 0 0011 divides the clock source by 6
  *                       - ...........................................................
  * @retval None
  * @par Required preconditions:
  * IrDA Low Power mode or smartcard mode enabled
  */
void UART2_SetPrescaler(u8 UART2_Prescaler)
{
    /* Load the UART2 prescaler value*/
    UART2->PSCR = UART2_Prescaler;
}

/**
  * @brief Checks whether the specified UART2 flag is set or not.
  * @par Full description:
  * Checks whether the specified UART2 flag is set or not.
  * @param[in] UART2_FLAG specifies the flag to check.
  * This parameter can be any of the @ref UART2_Flag_TypeDef enumeration.
  * @retval FlagStatus (SET or RESET)
  */

FlagStatus UART2_GetFlagStatus(UART2_Flag_TypeDef UART2_FLAG)
{
    FlagStatus status = RESET;

    /* Check parameters */
    assert_param(IS_UART2_FLAG_OK(UART2_FLAG));

    /* Check the status of the specified UART2 flag*/
    if (UART2_FLAG == UART2_FLAG_LBDF)
    {
        if ((UART2->CR4 & (u8)UART2_FLAG) != (u8)0x00)
        {
            /* UART2_FLAG is set*/
            status = SET;
        }
        else
        {
            /* UART2_FLAG is reset*/
            status = RESET;
        }
    }
    else if (UART2_FLAG == UART2_FLAG_SBK)
    {
        if ((UART2->CR2 & (u8)UART2_FLAG) != (u8)0x00)
        {
            /* UART2_FLAG is set*/
            status = SET;
        }
        else
        {
            /* UART2_FLAG is reset*/
            status = RESET;
        }
    }
    else if ((UART2_FLAG == UART2_FLAG_LHDF) || (UART2_FLAG == UART2_FLAG_LSF))
    {
        if ((UART2->CR6 & (u8)UART2_FLAG) != (u8)0x00)
        {
            /* UART2_FLAG is set*/
            status = SET;
        }
        else
        {
            /* UART2_FLAG is reset*/
            status = RESET;
        }
    }
    else
    {
        if ((UART2->SR & (u8)UART2_FLAG) != (u8)0x00)
        {
            /* UART2_FLAG is set*/
            status = SET;
        }
        else
        {
            /* UART2_FLAG is reset*/
            status = RESET;
        }
    }

    /* Return the UART2_FLAG status*/
    return  status;
}
/**
 * @brief Clears the UART2 flags.
 * @par Full description:
 * Clears the UART2 flags.
 * @param[in] UART2_FLAG specifies the flag to clear
 * This parameter can be any combination of the following values:
 *   - UART2_FLAG_LBDF: LIN Break detection flag.
 *   - UART2_FLAG_LHDF: LIN Header detection flag.
 *   - UART2_FLAG_LSF: LIN synchrone field flag.
 *   - UART2_FLAG_RXNE: Receive data register not empty flag.
 * @par Notes:
 *   - PE (Parity error), FE (Framing error), NE (Noise error), OR (OverRun error)
 *     and IDLE (Idle line detected) flags are cleared by software sequence: a read
 *     operation to UART2_SR register (UART2_GetFlagStatus())followed by a read operation
 *     to UART2_DR register(UART2_ReceiveData8() or UART2_ReceiveData9()).
 *   - RXNE flag can be also cleared by a read to the UART2_DR register
 *     (UART2_ReceiveData8()or UART2_ReceiveData9()).
 *   - TC flag can be also cleared by software sequence: a read operation to UART2_SR
 *     register (UART2_GetFlagStatus()) followed by a write operation to UART2_DR register
 *     (UART2_SendData8() or UART2_SendData9()).
 *   - TXE flag is cleared only by a write to the UART2_DR register (UART2_SendData8() or
 *     UART2_SendData9()).
 *   - SBK flag is cleared during the stop bit of break.
 * @retval None
 */

void UART2_ClearFlag(UART2_Flag_TypeDef UART2_FLAG)
{
    assert_param(IS_UART2_CLEAR_FLAG_OK(UART2_FLAG));

    /*< Clear the Receive Register Not Empty flag */
    if (UART2_FLAG == UART2_FLAG_RXNE)
    {
        UART2->SR = (u8)~(UART2_SR_RXNE);
    }
    /*< Clear the LIN Break Detection flag */
    else if (UART2_FLAG == UART2_FLAG_LBDF)
    {
        UART2->CR4 &= (u8)(~UART2_CR4_LBDF);
    }
    /*< Clear the LIN Header Detection Flag */
    else if (UART2_FLAG == UART2_FLAG_LHDF)
    {
        UART2->CR6 &= (u8)(~UART2_CR6_LHDF);
    }
    /*< Clear the LIN Synch Field flag */
    else
    {
        UART2->CR6 &= (u8)(~UART2_CR6_LSF);
    }

}

/**
  * @brief Checks whether the specified UART2 interrupt has occurred or not.
  * @par Full description:
  * Checks whether the specified UART2 interrupt has occurred or not.
  * @param[in] UART2_IT: Specifies the UART2 interrupt pending bit to check.
  * This parameter can be one of the following values:
  *   - UART2_IT_LBDF:  LIN Break detection interrupt
  *   - UART2_IT_TXE:  Tansmit Data Register empty interrupt
  *   - UART2_IT_TC:   Transmission complete interrupt
  *   - UART2_IT_RXNE: Receive Data register not empty interrupt
  *   - UART2_IT_IDLE: Idle line detection interrupt
  *   - UART2_IT_OR:  OverRun Error interrupt
  *   - UART2_IT_PE:   Parity Error interrupt
  * @retval
  * ITStatus The new state of UART2_IT (SET or RESET).
  */
ITStatus UART2_GetITStatus(UART2_IT_TypeDef UART2_IT)
{
    ITStatus pendingbitstatus = RESET;
    u8 itpos = 0;
    u8 itmask1 = 0;
    u8 itmask2 = 0;
    u8 enablestatus = 0;

    /* Check parameters */
    assert_param(IS_UART2_GET_IT_OK(UART2_IT));

    /* Get the UART2 IT index*/
    itpos = (u8)((u8)1 << (u8)((u8)UART2_IT & (u8)0x0F));
    /* Get the UART2 IT index*/
    itmask1 = (u8)((u8)UART2_IT >> (u8)4);
    /* Set the IT mask*/
    itmask2 = (u8)((u8)1 << itmask1);



    /* Check the status of the specified UART2 pending bit*/
    if (UART2_IT == UART2_IT_PE)
    {
        /* Get the UART2_ITPENDINGBIT enable bit status*/
        enablestatus = (u8)((u8)UART2->CR1 & itmask2);
        /* Check the status of the specified UART2 interrupt*/

        if (((UART2->SR & itpos) != (u8)0x00) && enablestatus)
        {
            /* Interrupt occurred*/
            pendingbitstatus = SET;
        }
        else
        {
            /* Interrupt not occurred*/
            pendingbitstatus = RESET;
        }
    }

    else if (UART2_IT == UART2_IT_LBDF)
    {
        /* Get the UART2_IT enable bit status*/
        enablestatus = (u8)((u8)UART2->CR4 & itmask2);
        /* Check the status of the specified UART2 interrupt*/
        if (((UART2->CR4 & itpos) != (u8)0x00) && enablestatus)
        {
            /* Interrupt occurred*/
            pendingbitstatus = SET;
        }
        else
        {
            /* Interrupt not occurred*/
            pendingbitstatus = RESET;
        }
    }
    else if (UART2_IT == UART2_IT_LHDF)
    {
        /* Get the UART2_IT enable bit status*/
        enablestatus = (u8)((u8)UART2->CR6 & itmask2);
        /* Check the status of the specified UART2 interrupt*/
        if (((UART2->CR6 & itpos) != (u8)0x00) && enablestatus)
        {
            /* Interrupt occurred*/
            pendingbitstatus = SET;
        }
        else
        {
            /* Interrupt not occurred*/
            pendingbitstatus = RESET;
        }
    }
    else
    {
        /* Get the UART2_IT enable bit status*/
        enablestatus = (u8)((u8)UART2->CR2 & itmask2);
        /* Check the status of the specified UART2 interrupt*/
        if (((UART2->SR & itpos) != (u8)0x00) && enablestatus)
        {
            /* Interrupt occurred*/
            pendingbitstatus = SET;
        }
        else
        {
            /* Interrupt not occurred*/
            pendingbitstatus = RESET;
        }
    }
    /* Return the UART2_IT status*/
    return  pendingbitstatus;
}

/**
 * @brief Clears the UART2 pending flags.
 * @par Full description:
 * Clears the UART2 pending bit.
 * @param[in] UART2_IT specifies the pending bit to clear
 * This parameter can be one of the following values:
 *   - UART2_IT_LBDF:  LIN Break detection interrupt
 *   - UART2_IT_LHDF:  LIN Header detection interrupt
 *   - UART2_IT_RXNE: Receive Data register not empty interrupt.
 *
 * @par Notes:
 *   - PE (Parity error), FE (Framing error), NE (Noise error), OR (OverRun error) and
 *     IDLE (Idle line detected) pending bits are cleared by software sequence: a read
 *     operation to UART2_SR register (UART2_GetITStatus()) followed by a read operation
 *     to UART2_DR register (UART2_ReceiveData8() or UART2_ReceiveData9() ).
 *   - RXNE pending bit can be also cleared by a read to the UART2_DR register
 *     (UART2_ReceiveData8() or UART2_ReceiveData9() ).
 *   - TC (Transmit complet) pending bit can be cleared by software sequence: a read
 *     operation to UART2_SR register (UART2_GetITStatus()) followed by a write operation
 *     to UART2_DR register (UART2_SendData8()or UART2_SendData9()).
 *   - TXE pending bit is cleared only by a write to the UART2_DR register
 *     (UART2_SendData8() or UART2_SendData9()).
 * @retval None
 */
void UART2_ClearITPendingBit(UART2_IT_TypeDef UART2_IT)
{
    assert_param(IS_UART2_CLEAR_IT_OK(UART2_IT));

    /*< Clear the Receive Register Not Empty pending bit */
    if (UART2_IT == UART2_IT_RXNE)
    {
        UART2->SR = (u8)~(UART2_SR_RXNE);
    }
    /*< Clear the LIN Break Detection pending bit */
    else if (UART2_IT == UART2_IT_LBDF)
    {
        UART2->CR4 &= (u8)~(UART2_CR4_LBDF);
    }
    /*< Clear the LIN Header Detection pending bit */
    else
    {
        UART2->CR6 &= (u8)(~UART2_CR6_LHDF);
    }
}
/**
  * @}
  */


/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/