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Serial Class Reference
A serial port (UART) for communication with other serial devices. More...
#include <Serial.h>
Inherits mbed::SerialBase, and mbed::Stream.
Public Member Functions | |
Serial (PinName tx, PinName rx, const char *name=NULL) | |
Create a Serial port, connected to the specified transmit and receive pins. | |
void | baud (int baudrate) |
Set the baud rate of the serial port. | |
void | format (int bits=8, Parity parity=SerialBase::None, int stop_bits=1) |
Set the transmission format used by the serial port. | |
int | readable () |
Determine if there is a character available to read. | |
int | writeable () |
Determine if there is space available to write a character. | |
void | attach (Callback< void()> func, IrqType type=RxIrq) |
Attach a function to call whenever a serial interrupt is generated. | |
template<typename T > | |
void | attach (T *obj, void(T::*method)(), IrqType type=RxIrq) |
Attach a member function to call whenever a serial interrupt is generated. | |
template<typename T > | |
void | attach (T *obj, void(*method)(T *), IrqType type=RxIrq) |
Attach a member function to call whenever a serial interrupt is generated. | |
void | send_break () |
Generate a break condition on the serial line. | |
void | set_flow_control (Flow type, PinName flow1=NC, PinName flow2=NC) |
Set the flow control type on the serial port. | |
int | write (const uint8_t *buffer, int length, const event_callback_t &callback, int event=SERIAL_EVENT_TX_COMPLETE) |
Begin asynchronous write using 8bit buffer. | |
int | write (const uint16_t *buffer, int length, const event_callback_t &callback, int event=SERIAL_EVENT_TX_COMPLETE) |
Begin asynchronous write using 16bit buffer. | |
void | abort_write () |
Abort the on-going write transfer. | |
int | read (uint8_t *buffer, int length, const event_callback_t &callback, int event=SERIAL_EVENT_RX_COMPLETE, unsigned char char_match=SERIAL_RESERVED_CHAR_MATCH) |
Begin asynchronous reading using 8bit buffer. | |
int | read (uint16_t *buffer, int length, const event_callback_t &callback, int event=SERIAL_EVENT_RX_COMPLETE, unsigned char char_match=SERIAL_RESERVED_CHAR_MATCH) |
Begin asynchronous reading using 16bit buffer. | |
void | abort_read () |
Abort the on-going read transfer. | |
int | set_dma_usage_tx (DMAUsage usage) |
Configure DMA usage suggestion for non-blocking TX transfers. | |
int | set_dma_usage_rx (DMAUsage usage) |
Configure DMA usage suggestion for non-blocking RX transfers. | |
Protected Member Functions | |
virtual void | lock () |
Acquire exclusive access to this serial port. | |
virtual void | unlock () |
Release exclusive access to this serial port. | |
virtual int | close () |
Close the file. | |
virtual ssize_t | write (const void *buffer, size_t length) |
Write the contents of a buffer to the file. | |
virtual ssize_t | read (void *buffer, size_t length) |
Function read Reads the contents of the file into a buffer. | |
virtual off_t | lseek (off_t offset, int whence) |
Move the file position to a given offset from a given location. | |
virtual int | isatty () |
Check if the handle is for a interactive terminal device. | |
virtual int | fsync () |
Flush any buffers associated with the FileHandle, ensuring it is up to date on disk. |
Detailed Description
A serial port (UART) for communication with other serial devices.
Can be used for Full Duplex communication, or Simplex by specifying one pin as NC (Not Connected)
Synchronization level: Thread safe
Example:
// Print "Hello World" to the PC #include "mbed.h" Serial pc(USBTX, USBRX); int main() { pc.printf("Hello World\n"); }
Definition at line 50 of file Serial.h.
Constructor & Destructor Documentation
Serial | ( | PinName | tx, |
PinName | rx, | ||
const char * | name = NULL |
||
) |
Create a Serial port, connected to the specified transmit and receive pins.
- Parameters:
-
tx Transmit pin rx Receive pin
- Note:
- Either tx or rx may be specified as NC if unused
Definition at line 23 of file Serial.cpp.
Member Function Documentation
void abort_read | ( | void | ) | [inherited] |
Abort the on-going read transfer.
Definition at line 176 of file SerialBase.cpp.
void abort_write | ( | void | ) | [inherited] |
Abort the on-going write transfer.
Definition at line 171 of file SerialBase.cpp.
void attach | ( | Callback< void()> | func, |
IrqType | type = RxIrq |
||
) | [inherited] |
Attach a function to call whenever a serial interrupt is generated.
- Parameters:
-
func A pointer to a void function, or 0 to set as none type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
Definition at line 64 of file SerialBase.cpp.
void attach | ( | T * | obj, |
void(T::*)() | method, | ||
IrqType | type = RxIrq |
||
) | [inherited] |
Attach a member function to call whenever a serial interrupt is generated.
- Parameters:
-
obj pointer to the object to call the member function on method pointer to the member function to be called type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
Definition at line 106 of file SerialBase.h.
void attach | ( | T * | obj, |
void(*)(T *) | method, | ||
IrqType | type = RxIrq |
||
) | [inherited] |
Attach a member function to call whenever a serial interrupt is generated.
- Parameters:
-
obj pointer to the object to call the member function on method pointer to the member function to be called type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
Definition at line 117 of file SerialBase.h.
void baud | ( | int | baudrate ) | [inherited] |
Set the baud rate of the serial port.
- Parameters:
-
baudrate The baudrate of the serial port (default = 9600).
Definition at line 36 of file SerialBase.cpp.
int close | ( | ) | [protected, virtual, inherited] |
Close the file.
- Returns:
- Zero on success, -1 on error.
Implements FileHandle.
Definition at line 63 of file Stream.cpp.
void format | ( | int | bits = 8 , |
Parity | parity = SerialBase::None , |
||
int | stop_bits = 1 |
||
) | [inherited] |
Set the transmission format used by the serial port.
- Parameters:
-
bits The number of bits in a word (5-8; default = 8) parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None) stop The number of stop bits (1 or 2; default = 1)
Definition at line 43 of file SerialBase.cpp.
int fsync | ( | ) | [protected, virtual, inherited] |
Flush any buffers associated with the FileHandle, ensuring it is up to date on disk.
- Returns:
- 0 on success or un-needed, -1 on error
Implements FileHandle.
Definition at line 105 of file Stream.cpp.
int isatty | ( | ) | [protected, virtual, inherited] |
Check if the handle is for a interactive terminal device.
If so, line buffered behaviour is used by default
- Returns:
- 1 if it is a terminal, 0 otherwise
Implements FileHandle.
Definition at line 101 of file Stream.cpp.
void lock | ( | void | ) | [protected, virtual] |
Acquire exclusive access to this serial port.
Reimplemented from SerialBase.
Definition at line 36 of file Serial.cpp.
off_t lseek | ( | off_t | offset, |
int | whence | ||
) | [protected, virtual, inherited] |
Move the file position to a given offset from a given location.
- Parameters:
-
offset The offset from whence to move to whence SEEK_SET for the start of the file, SEEK_CUR for the current file position, or SEEK_END for the end of the file.
- Returns:
- new file position on success, -1 on failure or unsupported
Implements FileHandle.
Definition at line 97 of file Stream.cpp.
int read | ( | uint8_t * | buffer, |
int | length, | ||
const event_callback_t & | callback, | ||
int | event = SERIAL_EVENT_RX_COMPLETE , |
||
unsigned char | char_match = SERIAL_RESERVED_CHAR_MATCH |
||
) | [inherited] |
Begin asynchronous reading using 8bit buffer.
The completition invokes registred RX event callback.
- Parameters:
-
buffer The buffer where received data will be stored length The buffer length in bytes callback The event callback function event The logical OR of RX events char_match The matching character
Definition at line 199 of file SerialBase.cpp.
int read | ( | uint16_t * | buffer, |
int | length, | ||
const event_callback_t & | callback, | ||
int | event = SERIAL_EVENT_RX_COMPLETE , |
||
unsigned char | char_match = SERIAL_RESERVED_CHAR_MATCH |
||
) | [inherited] |
Begin asynchronous reading using 16bit buffer.
The completition invokes registred RX event callback.
- Parameters:
-
buffer The buffer where received data will be stored length The buffer length in bytes callback The event callback function event The logical OR of RX events char_match The matching character
Definition at line 209 of file SerialBase.cpp.
ssize_t read | ( | void * | buffer, |
size_t | length | ||
) | [protected, virtual, inherited] |
Function read Reads the contents of the file into a buffer.
- Parameters:
-
buffer the buffer to read in to length the number of characters to read
- Returns:
- The number of characters read (zero at end of file) on success, -1 on error.
Implements FileHandle.
Definition at line 82 of file Stream.cpp.
int readable | ( | ) | [inherited] |
Determine if there is a character available to read.
- Returns:
- 1 if there is a character available to read, 0 otherwise
Definition at line 49 of file SerialBase.cpp.
void send_break | ( | ) | [inherited] |
Generate a break condition on the serial line.
Definition at line 94 of file SerialBase.cpp.
int set_dma_usage_rx | ( | DMAUsage | usage ) | [inherited] |
Configure DMA usage suggestion for non-blocking RX transfers.
- Parameters:
-
usage The usage DMA hint for peripheral
- Returns:
- Zero if the usage was set, -1 if a transaction is on-going
Definition at line 190 of file SerialBase.cpp.
int set_dma_usage_tx | ( | DMAUsage | usage ) | [inherited] |
Configure DMA usage suggestion for non-blocking TX transfers.
- Parameters:
-
usage The usage DMA hint for peripheral
- Returns:
- Zero if the usage was set, -1 if a transaction is on-going
Definition at line 181 of file SerialBase.cpp.
void set_flow_control | ( | Flow | type, |
PinName | flow1 = NC , |
||
PinName | flow2 = NC |
||
) | [inherited] |
Set the flow control type on the serial port.
- Parameters:
-
type the flow control type (Disabled, RTS, CTS, RTSCTS) flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS) flow2 the second flow control pin (CTS for RTSCTS)
Definition at line 119 of file SerialBase.cpp.
void unlock | ( | void | ) | [protected, virtual] |
Release exclusive access to this serial port.
Reimplemented from SerialBase.
Definition at line 40 of file Serial.cpp.
ssize_t write | ( | const void * | buffer, |
size_t | length | ||
) | [protected, virtual, inherited] |
Write the contents of a buffer to the file.
- Parameters:
-
buffer the buffer to write from length the number of characters to write
- Returns:
- The number of characters written (possibly 0) on success, -1 on error.
Implements FileHandle.
Definition at line 67 of file Stream.cpp.
int write | ( | const uint16_t * | buffer, |
int | length, | ||
const event_callback_t & | callback, | ||
int | event = SERIAL_EVENT_TX_COMPLETE |
||
) | [inherited] |
Begin asynchronous write using 16bit buffer.
The completition invokes registered TX event callback
- Parameters:
-
buffer The buffer where received data will be stored length The buffer length in bytes callback The event callback function event The logical OR of TX events
Definition at line 154 of file SerialBase.cpp.
int write | ( | const uint8_t * | buffer, |
int | length, | ||
const event_callback_t & | callback, | ||
int | event = SERIAL_EVENT_TX_COMPLETE |
||
) | [inherited] |
Begin asynchronous write using 8bit buffer.
The completition invokes registered TX event callback
- Parameters:
-
buffer The buffer where received data will be stored length The buffer length in bytes callback The event callback function event The logical OR of TX events
Definition at line 145 of file SerialBase.cpp.
int writeable | ( | ) | [inherited] |
Determine if there is space available to write a character.
- Returns:
- 1 if there is space to write a character, 0 otherwise
Definition at line 57 of file SerialBase.cpp.
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