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 * Copyright (c) 2015, Texas Instruments Incorporated
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//*****************************************************************************
//
// eusci_a_uart.h - Driver for the EUSCI_A_UART Module.
//
//*****************************************************************************

#ifndef __MSP430WARE_EUSCI_A_UART_H__
#define __MSP430WARE_EUSCI_A_UART_H__

#include "inc/hw_memmap.h"

#ifdef __MSP430_HAS_EUSCI_Ax__

//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif

#include "inc/hw_regaccess.h"
//*****************************************************************************
//
// The following values are the sync characters possible.
//
//*****************************************************************************
#define DEFAULT_SYNC                                                       0x00
#define EUSCI_A_UART_AUTOMATICBAUDRATE_SYNC                                0x55

//*****************************************************************************
//
//! \brief Used in the EUSCI_A_UART_init() function as the param parameter.
//
//*****************************************************************************
typedef struct EUSCI_A_UART_initParam {
    //! Selects Clock source.
    //! \n Valid values are:
    //! - \b EUSCI_A_UART_CLOCKSOURCE_SMCLK
    //! - \b EUSCI_A_UART_CLOCKSOURCE_ACLK
    uint8_t selectClockSource;
    //! Is the value to be written into UCBRx bits
    uint16_t clockPrescalar;
    //! Is First modulation stage register setting. This value is a pre-
    //! calculated value which can be obtained from the Device Users Guide.
    //! This value is written into UCBRFx bits of UCAxMCTLW.
    uint8_t firstModReg;
    //! Is Second modulation stage register setting. This value is a pre-
    //! calculated value which can be obtained from the Device Users Guide.
    //! This value is written into UCBRSx bits of UCAxMCTLW.
    uint8_t secondModReg;
    //! Is the desired parity.
    //! \n Valid values are:
    //! - \b EUSCI_A_UART_NO_PARITY [Default]
    //! - \b EUSCI_A_UART_ODD_PARITY
    //! - \b EUSCI_A_UART_EVEN_PARITY
    uint8_t parity;
    //! Controls direction of receive and transmit shift register.
    //! \n Valid values are:
    //! - \b EUSCI_A_UART_MSB_FIRST
    //! - \b EUSCI_A_UART_LSB_FIRST [Default]
    uint16_t msborLsbFirst;
    //! Indicates one/two STOP bits
    //! \n Valid values are:
    //! - \b EUSCI_A_UART_ONE_STOP_BIT [Default]
    //! - \b EUSCI_A_UART_TWO_STOP_BITS
    uint16_t numberofStopBits;
    //! Selects the mode of operation
    //! \n Valid values are:
    //! - \b EUSCI_A_UART_MODE [Default]
    //! - \b EUSCI_A_UART_IDLE_LINE_MULTI_PROCESSOR_MODE
    //! - \b EUSCI_A_UART_ADDRESS_BIT_MULTI_PROCESSOR_MODE
    //! - \b EUSCI_A_UART_AUTOMATIC_BAUDRATE_DETECTION_MODE
    uint16_t uartMode;
    //! Indicates low frequency or oversampling baud generation
    //! \n Valid values are:
    //! - \b EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION
    //! - \b EUSCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION
    uint8_t overSampling;
} EUSCI_A_UART_initParam;


//*****************************************************************************
//
// The following are values that can be passed to the parity parameter for
// functions: EUSCI_A_UART_initAdvance(); the param parameter for functions:
// EUSCI_A_UART_init().
//
//*****************************************************************************
#define EUSCI_A_UART_NO_PARITY                                             0x00
#define EUSCI_A_UART_ODD_PARITY                                            0x01
#define EUSCI_A_UART_EVEN_PARITY                                           0x02

//*****************************************************************************
//
// The following are values that can be passed to the msborLsbFirst parameter
// for functions: EUSCI_A_UART_initAdvance(); the param parameter for
// functions: EUSCI_A_UART_init().
//
//*****************************************************************************
#define EUSCI_A_UART_MSB_FIRST                                            UCMSB
#define EUSCI_A_UART_LSB_FIRST                                             0x00

//*****************************************************************************
//
// The following are values that can be passed to the uartMode parameter for
// functions: EUSCI_A_UART_initAdvance(); the param parameter for functions:
// EUSCI_A_UART_init().
//
//*****************************************************************************
#define EUSCI_A_UART_MODE                                              UCMODE_0
#define EUSCI_A_UART_IDLE_LINE_MULTI_PROCESSOR_MODE                    UCMODE_1
#define EUSCI_A_UART_ADDRESS_BIT_MULTI_PROCESSOR_MODE                  UCMODE_2
#define EUSCI_A_UART_AUTOMATIC_BAUDRATE_DETECTION_MODE                 UCMODE_3

//*****************************************************************************
//
// The following are values that can be passed to the selectClockSource
// parameter for functions: EUSCI_A_UART_initAdvance(); the param parameter for
// functions: EUSCI_A_UART_init().
//
//*****************************************************************************
#define EUSCI_A_UART_CLOCKSOURCE_SMCLK                            UCSSEL__SMCLK
#define EUSCI_A_UART_CLOCKSOURCE_ACLK                              UCSSEL__ACLK

//*****************************************************************************
//
// The following are values that can be passed to the numberofStopBits
// parameter for functions: EUSCI_A_UART_initAdvance(); the param parameter for
// functions: EUSCI_A_UART_init().
//
//*****************************************************************************
#define EUSCI_A_UART_ONE_STOP_BIT                                          0x00
#define EUSCI_A_UART_TWO_STOP_BITS                                        UCSPB

//*****************************************************************************
//
// The following are values that can be passed to the overSampling parameter
// for functions: EUSCI_A_UART_initAdvance(); the param parameter for
// functions: EUSCI_A_UART_init().
//
//*****************************************************************************
#define EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION                      0x01
#define EUSCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION                     0x00

//*****************************************************************************
//
// The following are values that can be passed to the mask parameter for
// functions: EUSCI_A_UART_enableInterrupt(), and
// EUSCI_A_UART_disableInterrupt().
//
//*****************************************************************************
#define EUSCI_A_UART_RECEIVE_INTERRUPT                                   UCRXIE
#define EUSCI_A_UART_TRANSMIT_INTERRUPT                                  UCTXIE
#define EUSCI_A_UART_RECEIVE_ERRONEOUSCHAR_INTERRUPT                    UCRXEIE
#define EUSCI_A_UART_BREAKCHAR_INTERRUPT                                UCBRKIE
#define EUSCI_A_UART_STARTBIT_INTERRUPT                                 UCSTTIE
#define EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT                      UCTXCPTIE

//*****************************************************************************
//
// The following are values that can be passed to the mask parameter for
// functions: EUSCI_A_UART_getInterruptStatus(), and
// EUSCI_A_UART_clearInterruptFlag() as well as returned by the
// EUSCI_A_UART_getInterruptStatus() function.
//
//*****************************************************************************
#define EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG                             UCRXIFG
#define EUSCI_A_UART_TRANSMIT_INTERRUPT_FLAG                            UCTXIFG
#define EUSCI_A_UART_STARTBIT_INTERRUPT_FLAG                           UCSTTIFG
#define EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT_FLAG                UCTXCPTIFG

//*****************************************************************************
//
// The following are values that can be passed to the mask parameter for
// functions: EUSCI_A_UART_queryStatusFlags() as well as returned by the
// EUSCI_A_UART_queryStatusFlags() function.
//
//*****************************************************************************
#define EUSCI_A_UART_LISTEN_ENABLE                                     UCLISTEN
#define EUSCI_A_UART_FRAMING_ERROR                                         UCFE
#define EUSCI_A_UART_OVERRUN_ERROR                                         UCOE
#define EUSCI_A_UART_PARITY_ERROR                                          UCPE
#define EUSCI_A_UART_BREAK_DETECT                                         UCBRK
#define EUSCI_A_UART_RECEIVE_ERROR                                      UCRXERR
#define EUSCI_A_UART_ADDRESS_RECEIVED                                    UCADDR
#define EUSCI_A_UART_IDLELINE                                            UCIDLE
#define EUSCI_A_UART_BUSY                                                UCBUSY

//*****************************************************************************
//
// The following are values that can be passed to the deglitchTime parameter
// for functions: EUSCI_A_UART_selectDeglitchTime().
//
//*****************************************************************************
#define EUSCI_A_UART_DEGLITCH_TIME_2ns                                     0x00
#define EUSCI_A_UART_DEGLITCH_TIME_50ns                                 UCGLIT0
#define EUSCI_A_UART_DEGLITCH_TIME_100ns                                UCGLIT1
#define EUSCI_A_UART_DEGLITCH_TIME_200ns                    (UCGLIT0 + UCGLIT1)

//*****************************************************************************
//
// Prototypes for the APIs.
//
//*****************************************************************************

//*****************************************************************************
//
//! \brief Advanced initialization routine for the UART block. The values to be
//! written into the clockPrescalar, firstModReg, secondModReg and overSampling
//! parameters should be pre-computed and passed into the initialization
//! function.
//!
//! Upon successful initialization of the UART block, this function will have
//! initialized the module, but the UART block still remains disabled and must
//! be enabled with EUSCI_A_UART_enable(). To calculate values for
//! clockPrescalar, firstModReg, secondModReg and overSampling please use the
//! link below.
//!
//! http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSP430BaudRateConverter/index.html
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param param is the pointer to struct for initialization.
//!
//! Modified bits are \b UCPEN, \b UCPAR, \b UCMSB, \b UC7BIT, \b UCSPB, \b
//! UCMODEx and \b UCSYNC of \b UCAxCTL0 register; bits \b UCSSELx and \b
//! UCSWRST of \b UCAxCTL1 register.
//!
//! \return STATUS_SUCCESS or STATUS_FAIL of the initialization process
//
//*****************************************************************************
extern bool EUSCI_A_UART_init(uint16_t baseAddress,
                              EUSCI_A_UART_initParam *param);

//*****************************************************************************
//
//! \brief Transmits a byte from the UART Module.
//!
//! This function will place the supplied data into UART transmit data register
//! to start transmission
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param transmitData data to be transmitted from the UART module
//!
//! Modified bits of \b UCAxTXBUF register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_transmitData(uint16_t baseAddress,
                                      uint8_t transmitData);

//*****************************************************************************
//
//! \brief Receives a byte that has been sent to the UART Module.
//!
//! This function reads a byte of data from the UART receive data Register.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! Modified bits of \b UCAxRXBUF register.
//!
//! \return Returns the byte received from by the UART module, cast as an
//!         uint8_t.
//
//*****************************************************************************
extern uint8_t EUSCI_A_UART_receiveData(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Enables individual UART interrupt sources.
//!
//! Enables the indicated UART interrupt sources.  The interrupt flag is first
//! and then the corresponding interrupt is enabled. Only the sources that are
//! enabled can be reflected to the processor interrupt; disabled sources have
//! no effect on the processor. Does not clear interrupt flags.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param mask is the bit mask of the interrupt sources to be enabled.
//!        Mask value is the logical OR of any of the following:
//!        - \b EUSCI_A_UART_RECEIVE_INTERRUPT - Receive interrupt
//!        - \b EUSCI_A_UART_TRANSMIT_INTERRUPT - Transmit interrupt
//!        - \b EUSCI_A_UART_RECEIVE_ERRONEOUSCHAR_INTERRUPT - Receive
//!           erroneous-character interrupt enable
//!        - \b EUSCI_A_UART_BREAKCHAR_INTERRUPT - Receive break character
//!           interrupt enable
//!        - \b EUSCI_A_UART_STARTBIT_INTERRUPT - Start bit received interrupt
//!           enable
//!        - \b EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT - Transmit complete
//!           interrupt enable
//!
//! Modified bits of \b UCAxCTL1 register and bits of \b UCAxIE register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_enableInterrupt(uint16_t baseAddress,
                                         uint8_t mask);

//*****************************************************************************
//
//! \brief Disables individual UART interrupt sources.
//!
//! Disables the indicated UART interrupt sources. Only the sources that are
//! enabled can be reflected to the processor interrupt; disabled sources have
//! no effect on the processor.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param mask is the bit mask of the interrupt sources to be disabled.
//!        Mask value is the logical OR of any of the following:
//!        - \b EUSCI_A_UART_RECEIVE_INTERRUPT - Receive interrupt
//!        - \b EUSCI_A_UART_TRANSMIT_INTERRUPT - Transmit interrupt
//!        - \b EUSCI_A_UART_RECEIVE_ERRONEOUSCHAR_INTERRUPT - Receive
//!           erroneous-character interrupt enable
//!        - \b EUSCI_A_UART_BREAKCHAR_INTERRUPT - Receive break character
//!           interrupt enable
//!        - \b EUSCI_A_UART_STARTBIT_INTERRUPT - Start bit received interrupt
//!           enable
//!        - \b EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT - Transmit complete
//!           interrupt enable
//!
//! Modified bits of \b UCAxCTL1 register and bits of \b UCAxIE register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_disableInterrupt(uint16_t baseAddress,
                                          uint8_t mask);

//*****************************************************************************
//
//! \brief Gets the current UART interrupt status.
//!
//! This returns the interrupt status for the UART module based on which flag
//! is passed.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param mask is the masked interrupt flag status to be returned.
//!        Mask value is the logical OR of any of the following:
//!        - \b EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG
//!        - \b EUSCI_A_UART_TRANSMIT_INTERRUPT_FLAG
//!        - \b EUSCI_A_UART_STARTBIT_INTERRUPT_FLAG
//!        - \b EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT_FLAG
//!
//! Modified bits of \b UCAxIFG register.
//!
//! \return Logical OR of any of the following:
//!         - \b EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG
//!         - \b EUSCI_A_UART_TRANSMIT_INTERRUPT_FLAG
//!         - \b EUSCI_A_UART_STARTBIT_INTERRUPT_FLAG
//!         - \b EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT_FLAG
//!         \n indicating the status of the masked flags
//
//*****************************************************************************
extern uint8_t EUSCI_A_UART_getInterruptStatus(uint16_t baseAddress,
                                               uint8_t mask);

//*****************************************************************************
//
//! \brief Clears UART interrupt sources.
//!
//! The UART interrupt source is cleared, so that it no longer asserts. The
//! highest interrupt flag is automatically cleared when an interrupt vector
//! generator is used.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param mask is a bit mask of the interrupt sources to be cleared.
//!        Mask value is the logical OR of any of the following:
//!        - \b EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG
//!        - \b EUSCI_A_UART_TRANSMIT_INTERRUPT_FLAG
//!        - \b EUSCI_A_UART_STARTBIT_INTERRUPT_FLAG
//!        - \b EUSCI_A_UART_TRANSMIT_COMPLETE_INTERRUPT_FLAG
//!
//! Modified bits of \b UCAxIFG register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_clearInterruptFlag(uint16_t baseAddress,
                                            uint8_t mask);

//*****************************************************************************
//
//! \brief Enables the UART block.
//!
//! This will enable operation of the UART block.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! Modified bits are \b UCSWRST of \b UCAxCTL1 register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_enable(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Disables the UART block.
//!
//! This will disable operation of the UART block.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! Modified bits are \b UCSWRST of \b UCAxCTL1 register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_disable(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Gets the current UART status flags.
//!
//! This returns the status for the UART module based on which flag is passed.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param mask is the masked interrupt flag status to be returned.
//!        Mask value is the logical OR of any of the following:
//!        - \b EUSCI_A_UART_LISTEN_ENABLE
//!        - \b EUSCI_A_UART_FRAMING_ERROR
//!        - \b EUSCI_A_UART_OVERRUN_ERROR
//!        - \b EUSCI_A_UART_PARITY_ERROR
//!        - \b EUSCI_A_UART_BREAK_DETECT
//!        - \b EUSCI_A_UART_RECEIVE_ERROR
//!        - \b EUSCI_A_UART_ADDRESS_RECEIVED
//!        - \b EUSCI_A_UART_IDLELINE
//!        - \b EUSCI_A_UART_BUSY
//!
//! Modified bits of \b UCAxSTAT register.
//!
//! \return Logical OR of any of the following:
//!         - \b EUSCI_A_UART_LISTEN_ENABLE
//!         - \b EUSCI_A_UART_FRAMING_ERROR
//!         - \b EUSCI_A_UART_OVERRUN_ERROR
//!         - \b EUSCI_A_UART_PARITY_ERROR
//!         - \b EUSCI_A_UART_BREAK_DETECT
//!         - \b EUSCI_A_UART_RECEIVE_ERROR
//!         - \b EUSCI_A_UART_ADDRESS_RECEIVED
//!         - \b EUSCI_A_UART_IDLELINE
//!         - \b EUSCI_A_UART_BUSY
//!         \n indicating the status of the masked interrupt flags
//
//*****************************************************************************
extern uint8_t EUSCI_A_UART_queryStatusFlags(uint16_t baseAddress,
                                             uint8_t mask);

//*****************************************************************************
//
//! \brief Sets the UART module in dormant mode
//!
//! Puts USCI in sleep mode Only characters that are preceded by an idle-line
//! or with address bit set UCRXIFG. In UART mode with automatic baud-rate
//! detection, only the combination of a break and sync field sets UCRXIFG.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! Modified bits of \b UCAxCTL1 register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_setDormant(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Re-enables UART module from dormant mode
//!
//! Not dormant. All received characters set UCRXIFG.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! Modified bits are \b UCDORM of \b UCAxCTL1 register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_resetDormant(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Transmits the next byte to be transmitted marked as address
//! depending on selected multiprocessor mode
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param transmitAddress is the next byte to be transmitted
//!
//! Modified bits of \b UCAxTXBUF register and bits of \b UCAxCTL1 register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_transmitAddress(uint16_t baseAddress,
                                         uint8_t transmitAddress);

//*****************************************************************************
//
//! \brief Transmit break.
//!
//! Transmits a break with the next write to the transmit buffer. In UART mode
//! with automatic baud-rate detection,
//! EUSCI_A_UART_AUTOMATICBAUDRATE_SYNC(0x55) must be written into UCAxTXBUF to
//! generate the required break/sync fields. Otherwise, DEFAULT_SYNC(0x00) must
//! be written into the transmit buffer. Also ensures module is ready for
//! transmitting the next data.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! Modified bits of \b UCAxTXBUF register and bits of \b UCAxCTL1 register.
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_transmitBreak(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Returns the address of the RX Buffer of the UART for the DMA module.
//!
//! Returns the address of the UART RX Buffer. This can be used in conjunction
//! with the DMA to store the received data directly to memory.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! \return Address of RX Buffer
//
//*****************************************************************************
extern uint32_t EUSCI_A_UART_getReceiveBufferAddress(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Returns the address of the TX Buffer of the UART for the DMA module.
//!
//! Returns the address of the UART TX Buffer. This can be used in conjunction
//! with the DMA to obtain transmitted data directly from memory.
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//!
//! \return Address of TX Buffer
//
//*****************************************************************************
extern uint32_t EUSCI_A_UART_getTransmitBufferAddress(uint16_t baseAddress);

//*****************************************************************************
//
//! \brief Sets the deglitch time
//!
//! \param baseAddress is the base address of the EUSCI_A_UART module.
//! \param deglitchTime is the selected deglitch time
//!        Valid values are:
//!        - \b EUSCI_A_UART_DEGLITCH_TIME_2ns
//!        - \b EUSCI_A_UART_DEGLITCH_TIME_50ns
//!        - \b EUSCI_A_UART_DEGLITCH_TIME_100ns
//!        - \b EUSCI_A_UART_DEGLITCH_TIME_200ns
//!
//! \return None
//
//*****************************************************************************
extern void EUSCI_A_UART_selectDeglitchTime(uint16_t baseAddress,
                                            uint16_t deglitchTime);

//*****************************************************************************
//
// The EUSCI_A_UART_initAdvance API has been deprecated.
//
//*****************************************************************************
#ifndef DEPRECATED
extern bool EUSCI_A_UART_initAdvance(uint16_t baseAddress,
                                     uint8_t selectClockSource,
                                     uint16_t clockPrescalar,
                                     uint8_t firstModReg,
                                     uint8_t secondModReg,
                                     uint8_t parity,
                                     uint16_t msborLsbFirst,
                                     uint16_t numberofStopBits,
                                     uint16_t uartMode,
                                     uint8_t overSampling);
#endif

//*****************************************************************************
//
// The following are deprecated APIs.
//
//*****************************************************************************
#define EUSCI_A_UART_getTransmitBufferAddressForDMA                           \
                                          EUSCI_A_UART_getTransmitBufferAddress

//*****************************************************************************
//
// The following are deprecated APIs.
//
//*****************************************************************************
#define EUSCI_A_UART_getReceiveBufferAddressForDMA                            \
                                           EUSCI_A_UART_getReceiveBufferAddress

//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif

#endif
#endif // __MSP430WARE_EUSCI_A_UART_H__
