MTS_SPI_Slave unfinished
Fork of MTS-Serial by
MTSSerialFlowControl.h
- Committer:
- ScottHoppeMultitech
- Date:
- 2017-11-16
- Revision:
- 14:d5a86071845e
- Parent:
- 4:d348d001283b
File content as of revision 14:d5a86071845e:
#ifndef MTSSERIALFLOWCONTROL_H #define MTSSERIALFLOWCONTROL_H #include "MTSSerial.h" namespace mts { /** This class derives from MTSBufferedIO/MTSSerial and provides a buffered wrapper to the * standard mbed Serial class along with generic RTS/CTS HW flow control. Since it * depends only on the mbed Serial, DigitalOut and DigitalIn classes for accessing * the serial data, this class is inherently portable accross different mbed platforms * and provides HW flow control even when not natively supported by the processors * serial port. If HW flow control is not needed, use MTSSerial instead. It should also * be noted that the RTS/CTS functionality in this class is implemented as a DTE device. */ class MTSSerialFlowControl : public MTSSerial { public: /** Creates a new MTSSerialFlowControl object that can be used to talk to an mbed serial * port through internal SW buffers. Note that this class also adds the ability to use * RTS/CTS HW Flow Conrtol through and standard mbed DigitalIn and DigitalOut pins. * The RTS and CTS functionality assumes this is a DTE device. * * @param TXD the transmit data pin on the desired mbed serial interface. * @param RXD the receive data pin on the desired mbed serial interface. * @param RTS the DigitalOut pin that RTS will be attached to. (DTE) * @param CTS the DigitalIn pin that CTS will be attached to. (DTE) * @param txBufferSize the size in bytes of the internal SW transmit buffer. The * default is 256 bytes. * @param rxBufferSize the size in bytes of the internal SW receive buffer. The * default is 256 bytes. */ MTSSerialFlowControl(PinName TXD, PinName RXD, PinName RTS, PinName CTS, int txBufSize = 256, int rxBufSize = 256); /** Destructs an MTSSerialFlowControl object and frees all related resources. */ ~MTSSerialFlowControl(); //Overriden from MTSBufferedIO to support flow control correctly virtual void rxClear(); private: void notifyStartSending(); // Used to set cts start signal void notifyStopSending(); // Used to set cts stop signal //This device acts as a DTE bool rxReadyFlag; //Tracks state change for rts signaling DigitalOut rts; // Used to tell DCE to send or not send data DigitalIn cts; // Used to check if DCE is ready for data int highThreshold; // High water mark for setting cts to stop int lowThreshold; // Low water mark for setting cts to start virtual void handleRead(); // Method for handling data to be read virtual void handleWrite(); // Method for handling data to be written }; } #endif /* MTSSERIALFLOWCONTROL */