//*****************************************************************************
//
//! Unregisters an interrupt handler for a UART interrupt
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function does the actual unregistering of the interrupt handler. It
//! clears the handler to be called when a UART interrupt occurs. This
//! function also masks off the interrupt in the interrupt controller so that
//! the interrupt handler no longer is called.
//!
//! \sa IntRegister() for important information about registering interrupt
//! handlers.
//!
//! \return None
//
//*****************************************************************************
void
UARTIntUnregister(uint32_t ui32Base)
{
uint32_t ui32Int;
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Determine the interrupt number based on the UART port.
//
ui32Int = ((ui32Base == UART0_BASE) ? INT_UART0 : INT_UART1);
//
// Disable the interrupt.
//
IntDisable(ui32Int);
//
// Unregister the interrupt handler.
//
IntUnregister(ui32Int);
}
//*****************************************************************************
//
//! Unregisters an interrupt handler for a UART interrupt.
//!
//! \param ulBase is the base address of the UART port.
//!
//! This function does the actual unregistering of the interrupt handler. It
//! clears the handler to be called when a UART interrupt occurs. This
//! function also masks off the interrupt in the interrupt controller so that
//! the interrupt handler no longer is called.
//!
//! \sa IntRegister() for important information about registering interrupt
//! handlers.
//!
//! \return None.
//
//*****************************************************************************
void
UARTIntUnregister(unsigned long ulBase)
{
unsigned long ulInt;
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Determine the interrupt number based on the UART port.
//
ulInt = UARTIntNumberGet(ulBase);
//
// Disable the interrupt.
//
IntDisable(ulInt);
//
// Unregister the interrupt handler.
//
IntUnregister(ulInt);
}
//*****************************************************************************
//
//! Disables transmitting and receiving
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function clears the UARTEN, TXE, and RXE bits, waits for the end of
//! transmission of the current character, and flushes the transmit FIFO.
//!
//! \return None
//
//*****************************************************************************
void
UARTDisable(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Wait for end of TX.
//
while(HWREG(ui32Base + UART_O_FR) & UART_FR_BUSY)
{
}
//
// Disable the FIFO.
//
HWREG(ui32Base + UART_O_LCRH) &= ~(UART_LCRH_FEN);
//
// Disable the UART.
//
HWREG(ui32Base + UART_O_CTL) &= ~(UART_CTL_UARTEN | UART_CTL_TXE |
UART_CTL_RXE);
}
//*****************************************************************************
//
//! Registers an interrupt handler for a UART interrupt.
//!
//! \param ulBase is the base address of the UART port.
//! \param pfnHandler is a pointer to the function to be called when the
//! UART interrupt occurs.
//!
//! This function does the actual registering of the interrupt handler. This
//! will enable the global interrupt in the interrupt controller; specific UART
//! interrupts must be enabled via UARTIntEnable(). It is the interrupt
//! handler's responsibility to clear the interrupt source.
//!
//! \sa IntRegister() for important information about registering interrupt
//! handlers.
//!
//! \return None.
//
//*****************************************************************************
void
UARTIntRegister(unsigned long ulBase, void (*pfnHandler)(void))
{
unsigned long ulInt;
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Determine the interrupt number based on the UART port.
//
ulInt = ((ulBase == UART0_BASE) ? INT_UART0 :
((ulBase == UART1_BASE) ? INT_UART1 : INT_UART2));
//
// Register the interrupt handler.
//
IntRegister(ulInt, pfnHandler);
//
// Enable the UART interrupt.
//
IntEnable(ulInt);
}
//*****************************************************************************
//
//! Registers an interrupt handler for a UART interrupt
//!
//! \param ui32Base is the base address of the UART port.
//! \param pfnHandler is a pointer to the function to be called when the
//! UART interrupt occurs.
//!
//! This function does the actual registering of the interrupt handler. This
//! function enables the global interrupt in the interrupt controller; specific
//! UART interrupts must be enabled via UARTIntEnable(). It is the interrupt
//! handler's responsibility to clear the interrupt source.
//!
//! \sa IntRegister() for important information about registering interrupt
//! handlers.
//!
//! \return None
//
//*****************************************************************************
void
UARTIntRegister(uint32_t ui32Base, void (*pfnHandler)(void))
{
uint32_t ui32Int;
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Determine the interrupt number based on the UART port.
//
ui32Int = ((ui32Base == UART0_BASE) ? INT_UART0 : INT_UART1);
//
// Register the interrupt handler.
//
IntRegister(ui32Int, pfnHandler);
//
// Enable the UART interrupt.
//
IntEnable(ui32Int);
}
//*****************************************************************************
//
//! Receives a character from the specified port
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function gets a character from the receive FIFO for the specified
//! port.
//!
//! \return Returns the character read from the specified port, cast as a
//! \e int32_t. A \b -1 is returned if there are no characters present in the
//! receive FIFO. The UARTCharsAvail() function should be called before
//! attempting to call this function.
//
//*****************************************************************************
int32_t
UARTCharGetNonBlocking(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// See if there are any characters in the receive FIFO.
//
if(!(HWREG(ui32Base + UART_O_FR) & UART_FR_RXFE))
{
//
// Read and return the next character.
//
return(HWREG(ui32Base + UART_O_DR));
}
else
{
//
// There are no characters, so return a failure.
//
return(-1);
}
}
//*****************************************************************************
//
//! Gets the current configuration of a UART.
//!
//! \param ulBase is the base address of the UART port.
//! \param ulUARTClk is the rate of the clock supplied to the UART module.
//! \param pulBaud is a pointer to storage for the baud rate.
//! \param pulConfig is a pointer to storage for the data format.
//!
//! The baud rate and data format for the UART is determined, given an
//! explicitly provided peripheral clock (hence the ExpClk suffix). The
//! returned baud rate is the actual baud rate; it may not be the exact baud
//! rate requested or an ``official'' baud rate. The data format returned in
//! \e pulConfig is enumerated the same as the \e ulConfig parameter of
//! UARTConfigSetExpClk().
//!
//! The peripheral clock will be the same as the processor clock. This will be
//! the value returned by SysCtlClockGet(), or it can be explicitly hard coded
//! if it is constant and known (to save the code/execution overhead of a call
//! to SysCtlClockGet()).
//!
//! This function replaces the original UARTConfigGet() API and performs the
//! same actions. A macro is provided in <tt>uart.h</tt> to map the original
//! API to this API.
//!
//! \return None.
//
//*****************************************************************************
void
UARTConfigGetExpClk(unsigned long ulBase, unsigned long ulUARTClk,
unsigned long *pulBaud, unsigned long *pulConfig)
{
unsigned long ulInt, ulFrac;
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Compute the baud rate.
//
ulInt = HWREG(ulBase + UART_O_IBRD);
ulFrac = HWREG(ulBase + UART_O_FBRD);
*pulBaud = (ulUARTClk * 4) / ((64 * ulInt) + ulFrac);
//
// Get the parity, data length, and number of stop bits.
//
*pulConfig = (HWREG(ulBase + UART_O_LCRH) &
(UART_LCRH_SPS | UART_LCRH_WLEN_M | UART_LCRH_STP2 |
UART_LCRH_EPS | UART_LCRH_PEN));
}
//*****************************************************************************
//
//! Unregisters an interrupt handler for a UART interrupt.
//!
//! \param ulBase is the base address of the UART port.
//!
//! This function does the actual unregistering of the interrupt handler. It
//! will clear the handler to be called when a UART interrupt occurs. This
//! will also mask off the interrupt in the interrupt controller so that the
//! interrupt handler no longer is called.
//!
//! \sa IntRegister() for important information about registering interrupt
//! handlers.
//!
//! \return None.
//
//*****************************************************************************
void
UARTIntUnregister(unsigned long ulBase)
{
unsigned long ulInt;
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Determine the interrupt number based on the UART port.
//
ulInt = ((ulBase == UART0_BASE) ? INT_UART0 :
((ulBase == UART1_BASE) ? INT_UART1 : INT_UART2));
//
// Disable the interrupt.
//
IntDisable(ulInt);
//
// Unregister the interrupt handler.
//
IntUnregister(ulInt);
}
//*****************************************************************************
//
//! Sends a character to the specified port
//!
//! \param ui32Base is the base address of the UART port.
//! \param ui8Data is the character to be transmitted.
//!
//! This function writes the character \e ui8Data to the transmit FIFO for the
//! specified port. This function does not block, so if there is no space
//! available, then a \b false is returned, and the application must retry the
//! function later.
//!
//! \return Returns \b true if the character was successfully placed in the
//! transmit FIFO or \b false if there was no space available in the transmit
//! FIFO.
//
//*****************************************************************************
bool
UARTCharPutNonBlocking(uint32_t ui32Base, uint8_t ui8Data)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// See if there is space in the transmit FIFO.
//
if(!(HWREG(ui32Base + UART_O_FR) & UART_FR_TXFF))
{
//
// Write this character to the transmit FIFO.
//
HWREG(ui32Base + UART_O_DR) = ui8Data;
//
// Success.
//
return(true);
}
else
{
//
// There is no space in the transmit FIFO, so return a failure.
//
return(false);
}
}
//*****************************************************************************
//
//! Returns the UART hardware flow control mode currently in use.
//!
//! \param ulBase is the base address of the UART port.
//!
//! This function returns the current hardware flow control mode.
//!
//! \note The availability of hardware flow control varies with the
//! part and UART in use. Please consult the datasheet for the part you are
//! using to determine whether this support is available.
//!
//! \return Returns the current flow control mode in use. This is a
//! logical OR combination of values \b UART_FLOWCONTROL_TX if transmit
//! (CTS) flow control is enabled and \b UART_FLOWCONTROL_RX if receive (RTS)
//! flow control is in use. If hardware flow control is disabled,
//! \b UART_FLOWCONTROL_NONE is returned.
//
//*****************************************************************************
unsigned long
UARTFlowControlGet(unsigned long ulBase)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
return(HWREG(ulBase + UART_O_CTL) & (UART_FLOWCONTROL_TX |
UART_FLOWCONTROL_RX));
}
//*****************************************************************************
//
//! Determines if there are any characters in the receive FIFO
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function returns a flag indicating whether or not there is data
//! available in the receive FIFO.
//!
//! \return Returns \b true if there is data in the receive FIFO or \b false
//! if there is no data in the receive FIFO.
//
//*****************************************************************************
bool
UARTCharsAvail(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Return the availability of characters.
//
return((HWREG(ui32Base + UART_O_FR) & UART_FR_RXFE) ? false : true);
}
//*****************************************************************************
//
//! Determines if there is any space in the transmit FIFO
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function returns a flag indicating whether or not there is space
//! available in the transmit FIFO.
//!
//! \return Returns \b true if there is space available in the transmit FIFO
//! or \b false if there is no space available in the transmit FIFO.
//
//*****************************************************************************
bool
UARTSpaceAvail(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Return the availability of space.
//
return((HWREG(ui32Base + UART_O_FR) & UART_FR_TXFF) ? false : true);
}
//*****************************************************************************
//
//! Disables SIR (IrDA) mode on the specified UART
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function clears the SIREN (IrDA) and SIRLP (Low Power) bits.
//!
//! \return None
//
//*****************************************************************************
void
UARTDisableSIR(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Disable SIR and SIRLP (if appropriate).
//
HWREG(ui32Base + UART_O_CTL) &= ~(UART_CTL_SIREN | UART_CTL_SIRLP);
}
//*****************************************************************************
//
//! Determines if there is any space in the transmit FIFO.
//!
//! \param ulBase is the base address of the UART port.
//!
//! This function returns a flag indicating whether or not there is space
//! available in the transmit FIFO.
//!
//! \return Returns \b true if there is space available in the transmit FIFO,
//! and \b false if there is no space available in the transmit FIFO.
//
//*****************************************************************************
tBoolean
UARTSpaceAvail(unsigned long ulBase)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Return the availability of space.
//
return((HWREG(ulBase + UART_O_FR) & UART_FR_TXFF) ? false : true);
}
//*****************************************************************************
//
//! Enables the transmit and receive FIFOs
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This functions enables the transmit and receive FIFOs in the UART.
//!
//! \return None
//
//*****************************************************************************
void
UARTFIFOEnable(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Enable the FIFO.
//
HWREG(ui32Base + UART_O_LCRH) |= UART_LCRH_FEN;
}
//*****************************************************************************
//
//! Disables the transmit and receive FIFOs
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This functions disables the transmit and receive FIFOs in the UART.
//!
//! \return None
//
//*****************************************************************************
void
UARTFIFODisable(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Disable the FIFO.
//
HWREG(ui32Base + UART_O_LCRH) &= ~(UART_LCRH_FEN);
}
//*****************************************************************************
//
//! Disables 9-bit mode on the specified UART
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function disables the 9-bit operational mode of the UART.
//!
//! \return None
//
//*****************************************************************************
void
UART9BitDisable(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Disable 9-bit mode.
//
HWREG(ui32Base + UART_O_NINEBITADDR) &= ~UART_NINEBITADDR_NINEBITEN;
}
//*****************************************************************************
//
//! Clears UART interrupt sources.
//!
//! \param ulBase is the base address of the UART port.
//! \param ulIntFlags is a bit mask of the interrupt sources to be cleared.
//!
//! The specified UART interrupt sources are cleared, so that they no longer
//! assert. This must be done in the interrupt handler to keep it from being
//! called again immediately upon exit.
//!
//! The \e ulIntFlags parameter has the same definition as the \e ulIntFlags
//! parameter to UARTIntEnable().
//!
//! \note Since there is a write buffer in the Cortex-M3 processor, it may take
//! several clock cycles before the interrupt source is actually cleared.
//! Therefore, it is recommended that the interrupt source be cleared early in
//! the interrupt handler (as opposed to the very last action) to avoid
//! returning from the interrupt handler before the interrupt source is
//! actually cleared. Failure to do so may result in the interrupt handler
//! being immediately reentered (since NVIC still sees the interrupt source
//! asserted).
//!
//! \return None.
//
//*****************************************************************************
void
UARTIntClear(unsigned long ulBase, unsigned long ulIntFlags)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Clear the requested interrupt sources.
//
HWREG(ulBase + UART_O_ICR) = ulIntFlags;
}
//*****************************************************************************
//
//! Disables the transmit and receive FIFOs.
//!
//! \param ulBase is the base address of the UART port.
//!
//! This functions disables the transmit and receive FIFOs in the UART.
//!
//! \return None.
//
//*****************************************************************************
void
UARTFIFODisable(unsigned long ulBase)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Disable the FIFO.
//
HWREG(ulBase + UART_O_LCRH) &= ~(UART_LCRH_FEN);
}
//*****************************************************************************
//
//! Disable UART DMA operation.
//!
//! \param ulBase is the base address of the UART port.
//! \param ulDMAFlags is a bit mask of the DMA features to disable.
//!
//! This function is used to disable UART DMA features that were enabled
//! by UARTDMAEnable(). The specified UART DMA features are disabled. The
//! \e ulDMAFlags parameter is the logical OR of any of the following values:
//!
//! - UART_DMA_RX - disable DMA for receive
//! - UART_DMA_TX - disable DMA for transmit
//! - UART_DMA_ERR_RXSTOP - do not disable DMA receive on UART error
//!
//! \return None.
//
//*****************************************************************************
void
UARTDMADisable(unsigned long ulBase, unsigned long ulDMAFlags)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Clear the requested bits in the UART DMA control register.
//
HWREG(ulBase + UART_O_DMACTL) &= ~ulDMAFlags;
}
//*****************************************************************************
//
//! Determines whether the UART transmitter is busy or not
//!
//! \param ui32Base is the base address of the UART port.
//!
//! Allows the caller to determine whether all transmitted bytes have cleared
//! the transmitter hardware. If \b false is returned, the transmit FIFO is
//! empty and all bits of the last transmitted character, including all stop
//! bits, have left the hardware shift register.
//!
//! \return Returns \b true if the UART is transmitting or \b false if all
//! transmissions are complete.
//
//*****************************************************************************
bool
UARTBusy(uint32_t ui32Base)
{
//
// Check the argument.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Determine if the UART is busy.
//
return((HWREG(ui32Base + UART_O_FR) & UART_FR_BUSY) ? true : false);
}
//*****************************************************************************
//
//! Clears UART interrupt sources
//!
//! \param ui32Base is the base address of the UART port.
//! \param ui32IntFlags is a bit mask of the interrupt sources to be cleared.
//!
//! The specified UART interrupt sources are cleared, so that they no longer
//! assert. This function must be called in the interrupt handler to keep the
//! interrupt from being recognized again immediately upon exit.
//!
//! The \e ui32IntFlags parameter has the same definition as the \e ui32IntFlags
//! parameter to UARTIntEnable().
//!
//! \note Because there is a write buffer in the Cortex-M3 processor, it may
//! take several clock cycles before the interrupt source is actually cleared.
//! Therefore, it is recommended that the interrupt source be cleared early in
//! the interrupt handler (as opposed to the very last action) to avoid
//! returning from the interrupt handler before the interrupt source is
//! actually cleared. Failure to do so may result in the interrupt handler
//! being immediately reentered (because the interrupt controller still sees
//! the interrupt source asserted).
//!
//! \return None
//
//*****************************************************************************
void
UARTIntClear(uint32_t ui32Base, uint32_t ui32IntFlags)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Clear the requested interrupt sources.
//
HWREG(ui32Base + UART_O_ICR) = ui32IntFlags;
}
//*****************************************************************************
//
//! Disables individual UART interrupt sources
//!
//! \param ui32Base is the base address of the UART port.
//! \param ui32IntFlags is the bit mask of the interrupt sources to be disabled.
//!
//! This function 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.
//!
//! The \e ui32IntFlags parameter has the same definition as the \e ui32IntFlags
//! parameter to UARTIntEnable().
//!
//! \return None
//
//*****************************************************************************
void
UARTIntDisable(uint32_t ui32Base, uint32_t ui32IntFlags)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Disable the specified interrupts.
//
HWREG(ui32Base + UART_O_IM) &= ~(ui32IntFlags);
}
//*****************************************************************************
//
//! Determines if there are any characters in the receive FIFO.
//!
//! \param ulBase is the base address of the UART port.
//!
//! This function returns a flag indicating whether or not there is data
//! available in the receive FIFO.
//!
//! \return Returns \b true if there is data in the receive FIFO, and \b false
//! if there is no data in the receive FIFO.
//
//*****************************************************************************
tBoolean
UARTCharsAvail(unsigned long ulBase)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Return the availability of characters.
//
return((HWREG(ulBase + UART_O_FR) & UART_FR_RXFE) ? false : true);
}
//*****************************************************************************
//
//! Determines whether the UART transmitter is busy or not.
//!
//! \param ulBase is the base address of the UART port.
//!
//! Allows the caller to determine whether all transmitted bytes have cleared
//! the transmitter hardware. If \b false is returned, the transmit FIFO is
//! empty and all bits of the last transmitted character, including all stop
//! bits, have left the hardware shift register.
//!
//! \return Returns \b true if the UART is transmitting or \b false if all
//! transmissions are complete.
//
//*****************************************************************************
tBoolean
UARTBusy(unsigned long ulBase)
{
//
// Check the argument.
//
ASSERT(UARTBaseValid(ulBase));
//
// Determine if the UART is busy.
//
return((HWREG(ulBase + UART_O_FR) & UART_FR_BUSY) ? true : false);
}
//*****************************************************************************
//
//! Disable UART DMA operation
//!
//! \param ui32Base is the base address of the UART port.
//! \param ui32DMAFlags is a bit mask of the DMA features to disable.
//!
//! This function is used to disable UART DMA features that were enabled
//! by UARTDMAEnable(). The specified UART DMA features are disabled. The
//! \e ui32DMAFlags parameter is the logical OR of any of the following values:
//!
//! - UART_DMA_RX - disable DMA for receive
//! - UART_DMA_TX - disable DMA for transmit
//! - UART_DMA_ERR_RXSTOP - do not disable DMA receive on UART error
//!
//! \return None
//
//*****************************************************************************
void
UARTDMADisable(uint32_t ui32Base, uint32_t ui32DMAFlags)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Clear the requested bits in the UART DMA control register.
//
HWREG(ui32Base + UART_O_DMACTL) &= ~ui32DMAFlags;
}
//*****************************************************************************
//
//! Disables individual UART interrupt sources.
//!
//! \param ulBase is the base address of the UART port.
//! \param ulIntFlags is the bit mask of the interrupt sources to be disabled.
//!
//! 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.
//!
//! The \e ulIntFlags parameter has the same definition as the \e ulIntFlags
//! parameter to UARTIntEnable().
//!
//! \return None.
//
//*****************************************************************************
void
UARTIntDisable(unsigned long ulBase, unsigned long ulIntFlags)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ulBase));
//
// Disable the specified interrupts.
//
HWREG(ulBase + UART_O_IM) &= ~(ulIntFlags);
}
//*****************************************************************************
//
//! Gets current receiver errors
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function returns the current state of each of the 4 receiver error
//! sources. The returned errors are equivalent to the four error bits
//! returned via the previous call to UARTCharGet() or UARTCharGetNonBlocking()
//! with the exception that the overrun error is set immediately the overrun
//! occurs rather than when a character is next read.
//!
//! \return Returns a logical OR combination of the receiver error flags,
//! \b UART_RXERROR_FRAMING, \b UART_RXERROR_PARITY, \b UART_RXERROR_BREAK
//! and \b UART_RXERROR_OVERRUN.
//
//*****************************************************************************
uint32_t
UARTRxErrorGet(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Return the current value of the receive status register.
//
return(HWREG(ui32Base + UART_O_RSR) & 0x0000000F);
}
//*****************************************************************************
//
//! Gets the baud clock source for the specified UART
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function returns the baud clock source for the specified UART. The
//! possible baud clock source are the system clock (\b UART_CLOCK_SYSTEM) or
//! the precision internal oscillator (\b UART_CLOCK_PIOSC).
//!
//! \return None
//
//*****************************************************************************
uint32_t
UARTClockSourceGet(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Return the UART clock source.
//
return(HWREG(ui32Base + UART_O_CC));
}
//*****************************************************************************
//
//! Returns the current operating mode for the UART transmit interrupt
//!
//! \param ui32Base is the base address of the UART port.
//!
//! This function returns the current operating mode for the UART transmit
//! interrupt. The return value is \b UART_TXINT_MODE_EOT if the transmit
//! interrupt is currently set to be asserted once the transmitter is
//! completely idle - the transmit FIFO is empty and all bits, including any
//! stop bits, have cleared the transmitter. The return value is
//! \b UART_TXINT_MODE_FIFO if the interrupt is set to be asserted based upon
//! the level of the transmit FIFO.
//!
//! \return Returns \b UART_TXINT_MODE_FIFO or \b UART_TXINT_MODE_EOT.
//
//*****************************************************************************
uint32_t
UARTTxIntModeGet(uint32_t ui32Base)
{
//
// Check the arguments.
//
ASSERT(UARTBaseValid(ui32Base));
//
// Return the current transmit interrupt mode.
//
return(HWREG(ui32Base + UART_O_CTL) & (UART_TXINT_MODE_EOT |
UART_TXINT_MODE_FIFO));
}