SoftSerialSendOnry.h

00001 #ifndef SOFTSERIAL_SEND_ONRY_H
00002 #define SOFTSERIAL_SEND_ONRY_H
00003 
00004 #include "mbed.h"
00005 #include "SoftSerial_Ticker.h"
00006 /** A software serial implementation
00007  *
00008  */
00009 class SoftSerialSendOnry: public Stream {
00010 
00011 public:
00012     /**
00013     * Constructor
00014     *
00015     * @param TX Name of the TX pin, NC for not connected
00016     * @param name Name of the connection
00017     */
00018     SoftSerialSendOnry(PinName TX, const char* name = NULL);
00019     virtual ~SoftSerialSendOnry();
00020     
00021     /** Set the baud rate of the serial port
00022      *
00023      *  @param baudrate The baudrate of the serial port (default = 9600).
00024      */
00025     void baud(int baudrate);
00026 
00027     enum Parity {
00028         None = 0,
00029         Odd,
00030         Even,
00031         Forced1,
00032         Forced0
00033     };
00034 
00035     enum IrqType {
00036         RxIrq = 0,
00037         TxIrq
00038     };
00039 
00040     /** Set the transmission format used by the serial port
00041      *
00042      *  @param bits The number of bits in a word (default = 8)
00043      *  @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None)
00044      *  @param stop The number of stop bits (default = 1)
00045      */
00046     void format(int bits=8, Parity parity=SoftSerialSendOnry::None, int stop_bits=1);
00047 
00048     /** Determine if there is space available to write a character
00049      *
00050      *  @returns
00051      *    1 if there is space to write a character,
00052      *    0 otherwise
00053      */
00054     int writeable();
00055 
00056     /** Attach a function to call whenever a serial interrupt is generated
00057      *
00058      *  @param fptr A pointer to a void function, or 0 to set as none
00059      *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
00060      */
00061     void attach(void (*fptr)(void), IrqType type=RxIrq) {
00062         fpointer[type].attach(fptr);
00063     }
00064 
00065     /** Attach a member function to call whenever a serial interrupt is generated
00066      *
00067      *  @param tptr pointer to the object to call the member function on
00068      *  @param mptr pointer to the member function to be called
00069      *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
00070      */
00071     template<typename T>
00072     void attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) {
00073         fpointer[type].attach(tptr, mptr);
00074     }
00075 
00076     /** Generate a break condition on the serial line
00077      */
00078     void send_break();
00079 
00080 protected:
00081     DigitalOut *tx;
00082     
00083     bool tx_en;
00084     int bit_period;
00085     int _bits, _stop_bits, _total_bits;
00086     Parity _parity;
00087     
00088     FunctionPointer fpointer[2];
00089     
00090     //tx
00091     void tx_handler(void);
00092     void prepare_tx(int c);
00093     FlexTicker txticker;
00094     int _char;
00095     volatile int tx_bit;
00096     
00097     
00098     
00099     virtual int _getc();
00100     virtual int _putc(int c);
00101 };
00102 
00103 
00104 #endif
00105