Diff: SerialBuffered/SerialBuffered.h

Revision:

0:9d5134074d84

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SerialBuffered/SerialBuffered.h	Fri Jul 08 23:52:38 2016 +0000
@@ -0,0 +1,61 @@
+#pragma once
+
+// This is a buffered serial reading class, using the serial interrupt introduced in mbed library version 18 on 17/11/09
+
+// In the simplest case, construct it with a buffer size at least equal to the largest message you 
+// expect your program to receive in one go.
+
+class SerialBuffered : public Serial
+{
+public:
+    SerialBuffered( PinName tx, PinName rx, size_t bufferSize );
+    virtual ~SerialBuffered();
+    
+    int readable(); // returns 1 if there is a character available to read, 0 otherwise
+    
+    void setTimeout( float seconds );    // maximum time in seconds that getc() should block 
+                                         // while waiting for a character
+                                         // Pass -1 to disable the timeout.
+    
+    size_t readBytes( uint8_t *bytes, size_t requested );    // read requested bytes into a buffer, 
+                                                             // return number actually read, 
+                                                             // which may be less than requested if there has been a timeout
+    
+    void disable_flow_ctrl(void) { serial_set_flow_control(&_serial, FlowControlNone, NC, NC); }
+//    void suspend(bool enable) {
+//        if (enable) {
+//            serial_irq_set(&_serial, (SerialIrq)RxIrq, 0);
+//                serial_break_set(&_serial);
+//                _serial.uart->ENABLE         = (UART_ENABLE_ENABLE_Disabled << UART_ENABLE_ENABLE_Pos);
+//        } else {
+//                _serial.uart->ENABLE         = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos);
+//                serial_break_clear(&_serial);
+//            _serial.uart->EVENTS_RXDRDY  = 0;
+//            // dummy write needed or TXDRDY trails write rather than leads write.
+//            //  pins are disconnected so nothing is physically transmitted on the wire
+//            _serial.uart->TXD            = 0;
+//            serial_irq_set(&_serial, (SerialIrq)RxIrq, 1);
+//        }
+//    }
+
+protected:
+    PinName _txpin;
+    PinName _rxpin;
+
+protected:
+    virtual int _getc();
+    virtual int _putc(int c);
+    
+private:
+    
+    void handleInterrupt();
+    
+   
+    uint8_t *m_buff;            // points at a circular buffer, containing data from m_contentStart, for m_contentSize bytes, wrapping when you get to the end
+    volatile uint16_t  m_contentStart;   // index of first bytes of content
+    volatile uint16_t  m_contentEnd;     // index of bytes after last byte of content
+    uint16_t m_buffSize;
+    float m_timeout;
+    Timer m_timer;
+
+};