LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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Modules | Functions
CHIP: LPC11xx UART Driver
LPC11xx chip specific drivers

Detailed Description

Modules

 CHIP: LPC11xx UART Driver blocking transfer functions
 
 CHIP: LPC11xx UART Driver interrupt transfer functions
 

Functions

void Chip_UART_Init (LPC_USART_T *pUART)
 Initializes the pUART peripheral.
 
void Chip_UART_DeInit (LPC_USART_T *pUART)
 De-initializes the pUART peripheral.
 
STATIC INLINE void Chip_UART_TXEnable (LPC_USART_T *pUART)
 Enable transmission on UART TxD pin.
 
STATIC INLINE void Chip_UART_TXDisable (LPC_USART_T *pUART)
 Disable transmission on UART TxD pin.
 
STATIC INLINE void Chip_UART_SendByte (LPC_USART_T *pUART, uint8_t data)
 Transmit a single byte through the UART peripheral.
 
STATIC INLINE uint8_t Chip_UART_ReadByte (LPC_USART_T *pUART)
 Get a single data from UART peripheral.
 
int Chip_UART_Send (LPC_USART_T *pUART, const void *data, int numBytes)
 Transmit a byte array through the UART peripheral (non-blocking)
 
int Chip_UART_Read (LPC_USART_T *pUART, void *data, int numBytes)
 Read data through the UART peripheral (non-blocking)
 
STATIC INLINE void Chip_UART_IntEnable (LPC_USART_T *pUART, uint32_t intMask)
 Enable UART interrupts.
 
STATIC INLINE void Chip_UART_IntDisable (LPC_USART_T *pUART, uint32_t intMask)
 Disable UART interrupts.
 
STATIC INLINE uint32_t Chip_UART_ReadIntIDReg (LPC_USART_T *pUART)
 Read the Interrupt Identification Register (IIR)
 
STATIC INLINE void Chip_UART_SetupFIFOS (LPC_USART_T *pUART, uint32_t fcr)
 Setup the UART FIFOs.
 
STATIC INLINE void Chip_UART_ConfigData (LPC_USART_T *pUART, uint32_t config)
 Configure data width, parity mode and stop bits.
 
STATIC INLINE void Chip_UART_EnableDivisorAccess (LPC_USART_T *pUART)
 Enable access to Divisor Latches.
 
STATIC INLINE void Chip_UART_DisableDivisorAccess (LPC_USART_T *pUART)
 Disable access to Divisor Latches.
 
STATIC INLINE void Chip_UART_SetDivisorLatches (LPC_USART_T *pUART, uint8_t dll, uint8_t dlm)
 Set LSB and MSB divisor latch registers.
 
STATIC INLINE uint32_t Chip_UART_ReadModemControl (LPC_USART_T *pUART)
 Return modem control register/status.
 
STATIC INLINE void Chip_UART_SetModemControl (LPC_USART_T *pUART, uint32_t mcr)
 Set modem control register/status.
 
STATIC INLINE void Chip_UART_ClearModemControl (LPC_USART_T *pUART, uint32_t mcr)
 Clear modem control register/status.
 
STATIC INLINE uint32_t Chip_UART_ReadLineStatus (LPC_USART_T *pUART)
 Return Line Status register/status (LSR)
 
STATIC INLINE uint32_t Chip_UART_ReadModemStatus (LPC_USART_T *pUART)
 Return Modem Status register/status (MSR)
 
STATIC INLINE void Chip_UART_SetScratch (LPC_USART_T *pUART, uint8_t data)
 Write a byte to the scratchpad register.
 
STATIC INLINE uint8_t Chip_UART_ReadScratch (LPC_USART_T *pUART)
 Returns current byte value in the scratchpad register.
 
STATIC INLINE void Chip_UART_SetAutoBaudReg (LPC_USART_T *pUART, uint32_t acr)
 Set autobaud register options.
 
STATIC INLINE void Chip_UART_ClearAutoBaudReg (LPC_USART_T *pUART, uint32_t acr)
 Clear autobaud register options.
 
STATIC INLINE void Chip_UART_SetRS485Flags (LPC_USART_T *pUART, uint32_t ctrl)
 Set RS485 control register options.
 
STATIC INLINE void Chip_UART_ClearRS485Flags (LPC_USART_T *pUART, uint32_t ctrl)
 Clear RS485 control register options.
 
STATIC INLINE void Chip_UART_SetRS485Addr (LPC_USART_T *pUART, uint8_t addr)
 Set RS485 address match value.
 
STATIC INLINE uint8_t Chip_UART_GetRS485Addr (LPC_USART_T *pUART)
 Read RS485 address match value.
 
STATIC INLINE void Chip_UART_SetRS485Delay (LPC_USART_T *pUART, uint8_t dly)
 Set RS485 direction control (RTS or DTR) delay value.
 
STATIC INLINE uint8_t Chip_UART_GetRS485Delay (LPC_USART_T *pUART)
 Read RS485 direction control (RTS or DTR) delay value.
 
uint32_t Chip_UART_SetBaud (LPC_USART_T *pUART, uint32_t baudrate)
 Sets best dividers to get a target bit rate (without fractional divider)
 
STATIC INLINE uint32_t Chip_UART_SetBaudFDR (LPC_USART_T *pUART, uint32_t baudrate)
 Sets best dividers to get a target bit rate (with fractional divider)
 

Function Documentation

STATIC INLINE void Chip_UART_ClearAutoBaudReg ( LPC_USART_T *  pUART,
uint32_t  acr 
)

Clear autobaud register options.

Parameters
pUART: Pointer to selected UART peripheral
acr: Or'ed values to clear for ACR register
Returns
Nothing
Note
Use an Or'ed value of UART_ACR_* definitions with this call to clear specific options.

Definition at line 339 of file uart_11xx.h.

STATIC INLINE void Chip_UART_ClearModemControl ( LPC_USART_T *  pUART,
uint32_t  mcr 
)

Clear modem control register/status.

Parameters
pUART: Pointer to selected UART peripheral
mcr: Modem control register flags to clear
Returns
Nothing
Note
Use an Or'ed value of UART_MCR_* definitions with this call to clear specific options.

Definition at line 268 of file uart_11xx.h.

STATIC INLINE void Chip_UART_ClearRS485Flags ( LPC_USART_T *  pUART,
uint32_t  ctrl 
)

Clear RS485 control register options.

Parameters
pUART: Pointer to selected UART peripheral
ctrl: Or'ed values to clear for RS485 control register
Returns
Nothing
Note
Use an Or'ed value of UART_RS485CTRL_* definitions with this call to clear specific options.

Definition at line 365 of file uart_11xx.h.

STATIC INLINE void Chip_UART_ConfigData ( LPC_USART_T *  pUART,
uint32_t  config 
)

Configure data width, parity mode and stop bits.

Parameters
pUART: Pointer to selected pUART peripheral
config: UART configuration, Or'ed values of UART_LCR_* defines
Returns
Nothing
Note
Select OR'ed config options for the UART from the UART_LCR_* definitions. For example, a configuration of 8 data bits, 1 stop bit, and even (enabled) parity would be (UART_LCR_WLEN8 | UART_LCR_SBS_1BIT | UART_LCR_PARITY_EN | UART_LCR_PARITY_EVEN).

Definition at line 194 of file uart_11xx.h.

void Chip_UART_DeInit ( LPC_USART_T *  pUART)

De-initializes the pUART peripheral.

Parameters
pUART: Pointer to selected pUART peripheral
Returns
Nothing

Definition at line 64 of file uart_11xx.c.

STATIC INLINE void Chip_UART_DisableDivisorAccess ( LPC_USART_T *  pUART)

Disable access to Divisor Latches.

Parameters
pUART: Pointer to selected UART peripheral
Returns
Nothing

Definition at line 215 of file uart_11xx.h.

STATIC INLINE void Chip_UART_EnableDivisorAccess ( LPC_USART_T *  pUART)

Enable access to Divisor Latches.

Parameters
pUART: Pointer to selected UART peripheral
Returns
Nothing

Definition at line 205 of file uart_11xx.h.

STATIC INLINE uint8_t Chip_UART_GetRS485Addr ( LPC_USART_T *  pUART)

Read RS485 address match value.

Parameters
pUART: Pointer to selected UART peripheral
Returns
Address match value for RS-485/EIA-485 mode

Definition at line 386 of file uart_11xx.h.

STATIC INLINE uint8_t Chip_UART_GetRS485Delay ( LPC_USART_T *  pUART)

Read RS485 direction control (RTS or DTR) delay value.

Parameters
pUART: Pointer to selected UART peripheral
Returns
direction control (RTS or DTR) delay value
Note
This delay time is in periods of the baud clock. Any delay time from 0 to 255 bit times may be programmed.

Definition at line 411 of file uart_11xx.h.

void Chip_UART_Init ( LPC_USART_T *  pUART)

Initializes the pUART peripheral.

Parameters
pUART: Pointer to selected pUART peripheral
Returns
Nothing

Definition at line 54 of file uart_11xx.c.

STATIC INLINE void Chip_UART_IntDisable ( LPC_USART_T *  pUART,
uint32_t  intMask 
)

Disable UART interrupts.

Parameters
pUART: Pointer to selected UART peripheral
intMask: Or'ed Interrupts to disable in the Interrupt Enable Register (IER)
Returns
Nothing
Note
Use an Or'ed value of UART_IER_* definitions with this call to disable specific UART interrupts. The Divisor Latch Access Bit (DLAB) in LCR must be cleared in order to access the IER register. This function doesn't alter the DLAB state.

Definition at line 154 of file uart_11xx.h.

STATIC INLINE void Chip_UART_IntEnable ( LPC_USART_T *  pUART,
uint32_t  intMask 
)

Enable UART interrupts.

Parameters
pUART: Pointer to selected UART peripheral
intMask: Or'ed Interrupts to enable in the Interrupt Enable Register (IER)
Returns
Nothing
Note
Use an Or'ed value of UART_IER_* definitions with this call to enable specific UART interrupts. The Divisor Latch Access Bit (DLAB) in LCR must be cleared in order to access the IER register. This function doesn't alter the DLAB state.

Definition at line 139 of file uart_11xx.h.

int Chip_UART_Read ( LPC_USART_T *  pUART,
void *  data,
int  numBytes 
)

Read data through the UART peripheral (non-blocking)

Parameters
pUART: Pointer to selected UART peripheral
data: Pointer to bytes array to fill
numBytes: Size of the passed data array
Returns
The actual number of bytes read
Note
This function reads data from the receive FIFO until either all the data has been read or the passed buffer is completely full. This function will not block. This function ignores errors.

Definition at line 106 of file uart_11xx.c.

STATIC INLINE uint8_t Chip_UART_ReadByte ( LPC_USART_T *  pUART)

Get a single data from UART peripheral.

Parameters
pUART: Pointer to selected UART peripheral
Returns
A single byte of data read
Note
This function reads a byte from the UART receive FIFO or receive hold register regard regardless of UART state. The FIFO status should be read first prior to using this function.

Definition at line 99 of file uart_11xx.h.

STATIC INLINE uint32_t Chip_UART_ReadIntIDReg ( LPC_USART_T *  pUART)

Read the Interrupt Identification Register (IIR)

Parameters
pUART: Pointer to selected UART peripheral
Returns
Current pending interrupt status per the IIR register

Definition at line 164 of file uart_11xx.h.

STATIC INLINE uint32_t Chip_UART_ReadLineStatus ( LPC_USART_T *  pUART)

Return Line Status register/status (LSR)

Parameters
pUART: Pointer to selected UART peripheral
Returns
Line Status register (status)
Note
Mask bits of the returned status value with UART_LSR_* definitions for specific statuses.

Definition at line 280 of file uart_11xx.h.

STATIC INLINE uint32_t Chip_UART_ReadModemControl ( LPC_USART_T *  pUART)

Return modem control register/status.

Parameters
pUART: Pointer to selected UART peripheral
Returns
Modem control register (status)
Note
Mask bits of the returned status value with UART_MCR_* definitions for specific statuses.

Definition at line 242 of file uart_11xx.h.

STATIC INLINE uint32_t Chip_UART_ReadModemStatus ( LPC_USART_T *  pUART)

Return Modem Status register/status (MSR)

Parameters
pUART: Pointer to selected UART peripheral
Returns
Modem Status register (status)
Note
Mask bits of the returned status value with UART_MSR_* definitions for specific statuses.

Definition at line 292 of file uart_11xx.h.

STATIC INLINE uint8_t Chip_UART_ReadScratch ( LPC_USART_T *  pUART)

Returns current byte value in the scratchpad register.

Parameters
pUART: Pointer to selected UART peripheral
Returns
Byte value read from scratchpad register

Definition at line 313 of file uart_11xx.h.

int Chip_UART_Send ( LPC_USART_T *  pUART,
const void *  data,
int  numBytes 
)

Transmit a byte array through the UART peripheral (non-blocking)

Parameters
pUART: Pointer to selected UART peripheral
data: Pointer to bytes to transmit
numBytes: Number of bytes to transmit
Returns
The actual number of bytes placed into the FIFO
Note
This function places data into the transmit FIFO until either all the data is in the FIFO or the FIFO is full. This function will not block in the FIFO is full. The actual number of bytes placed into the FIFO is returned. This function ignores errors.

Definition at line 73 of file uart_11xx.c.

STATIC INLINE void Chip_UART_SendByte ( LPC_USART_T *  pUART,
uint8_t  data 
)

Transmit a single byte through the UART peripheral.

Transmit a 8 bits data.

Parameters
pUART: Pointer to selected UART peripheral
data: Byte to transmit
Returns
Nothing
Note
This function attempts to place a byte into the UART transmit FIFO or transmit hold register regard regardless of UART state.

Definition at line 86 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetAutoBaudReg ( LPC_USART_T *  pUART,
uint32_t  acr 
)

Set autobaud register options.

Parameters
pUART: Pointer to selected UART peripheral
acr: Or'ed values to set for ACR register
Returns
Nothing
Note
Use an Or'ed value of UART_ACR_* definitions with this call to set specific options.

Definition at line 326 of file uart_11xx.h.

uint32_t Chip_UART_SetBaud ( LPC_USART_T *  pUART,
uint32_t  baudrate 
)

Sets best dividers to get a target bit rate (without fractional divider)

Parameters
pUART: Pointer to selected UART peripheral
baudrate: Target baud rate (baud rate = bit rate)
Returns
The actual baud rate, or 0 if no rate can be found

Definition at line 139 of file uart_11xx.c.

STATIC INLINE uint32_t Chip_UART_SetBaudFDR ( LPC_USART_T *  pUART,
uint32_t  baudrate 
)

Sets best dividers to get a target bit rate (with fractional divider)

Parameters
pUART: Pointer to selected UART peripheral
baudrate: Target baud rate (baud rate = bit rate)
Returns
The actual baud rate, or 0 if no rate can be found

Definition at line 430 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetDivisorLatches ( LPC_USART_T *  pUART,
uint8_t  dll,
uint8_t  dlm 
)

Set LSB and MSB divisor latch registers.

Parameters
pUART: Pointer to selected UART peripheral
dll: Divisor Latch LSB value
dlm: Divisor Latch MSB value
Returns
Nothing
Note
The Divisor Latch Access Bit (DLAB) in LCR must be set in order to access the USART Divisor Latches. This function doesn't alter the DLAB state.

Definition at line 230 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetModemControl ( LPC_USART_T *  pUART,
uint32_t  mcr 
)

Set modem control register/status.

Parameters
pUART: Pointer to selected UART peripheral
mcr: Modem control register flags to set
Returns
Nothing
Note
Use an Or'ed value of UART_MCR_* definitions with this call to set specific options.

Definition at line 255 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetRS485Addr ( LPC_USART_T *  pUART,
uint8_t  addr 
)

Set RS485 address match value.

Parameters
pUART: Pointer to selected UART peripheral
addr: Address match value for RS-485/EIA-485 mode
Returns
Nothing

Definition at line 376 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetRS485Delay ( LPC_USART_T *  pUART,
uint8_t  dly 
)

Set RS485 direction control (RTS or DTR) delay value.

Parameters
pUART: Pointer to selected UART peripheral
dly: direction control (RTS or DTR) delay value
Returns
Nothing
Note
This delay time is in periods of the baud clock. Any delay time from 0 to 255 bit times may be programmed.

Definition at line 399 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetRS485Flags ( LPC_USART_T *  pUART,
uint32_t  ctrl 
)

Set RS485 control register options.

Parameters
pUART: Pointer to selected UART peripheral
ctrl: Or'ed values to set for RS485 control register
Returns
Nothing
Note
Use an Or'ed value of UART_RS485CTRL_* definitions with this call to set specific options.

Definition at line 352 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetScratch ( LPC_USART_T *  pUART,
uint8_t  data 
)

Write a byte to the scratchpad register.

Parameters
pUART: Pointer to selected UART peripheral
data: Byte value to write
Returns
Nothing

Definition at line 303 of file uart_11xx.h.

STATIC INLINE void Chip_UART_SetupFIFOS ( LPC_USART_T *  pUART,
uint32_t  fcr 
)

Setup the UART FIFOs.

Parameters
pUART: Pointer to selected UART peripheral
fcr: FIFO control register setup OR'ed flags
Returns
Nothing
Note
Use an Or'ed value of UART_FCR_* definitions with this call to select specific options. For example, to enable the FIFOs with a RX trip level of 8 characters, use something like (UART_FCR_FIFO_EN | UART_FCR_TRG_LEV2).

Definition at line 179 of file uart_11xx.h.

STATIC INLINE void Chip_UART_TXDisable ( LPC_USART_T *  pUART)

Disable transmission on UART TxD pin.

Parameters
pUART: Pointer to selected pUART peripheral
Returns
Nothing

Definition at line 73 of file uart_11xx.h.

STATIC INLINE void Chip_UART_TXEnable ( LPC_USART_T *  pUART)

Enable transmission on UART TxD pin.

Parameters
pUART: Pointer to selected pUART peripheral
Returns
Nothing

Definition at line 63 of file uart_11xx.h.