Diff: cpp/Serial.h

Revision:

0:fd0d7bdfcdc2

Child:

2:143cac498751

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpp/Serial.h	Tue Nov 20 17:24:08 2012 +0000
@@ -0,0 +1,159 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef MBED_SERIAL_H
+#define MBED_SERIAL_H
+
+#include "platform.h"
+
+#if DEVICE_SERIAL
+
+#include "Stream.h"
+#include "FunctionPointer.h"
+#include "serial_api.h"
+
+namespace mbed {
+
+/** 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)
+ *
+ * Example:
+ * @code
+ * // Print "Hello World" to the PC
+ *
+ * #include "mbed.h"
+ *
+ * Serial pc(USBTX, USBRX);
+ *
+ * int main() {
+ *     pc.printf("Hello World\n");
+ * }
+ * @endcode
+ */
+class Serial : public Stream {
+
+public:
+
+    /** Create a Serial port, connected to the specified transmit and receive pins
+     *
+     *  @param tx Transmit pin 
+     *  @param rx Receive pin
+     *
+     *  @note
+     *    Either tx or rx may be specified as NC if unused
+     */
+    Serial(PinName tx, PinName rx) {
+        serial_init(&_serial, tx, rx);
+        serial_irq_handler(&_serial, Serial::_irq_handler, (uint32_t)this);
+    }
+
+    /** Set the baud rate of the serial port
+     *  
+     *  @param baudrate The baudrate of the serial port (default = 9600).
+     */
+    void baud(int baudrate) {
+        serial_baud(&_serial, baudrate);
+    }
+
+    /** Set the transmission format used by the Serial port
+     *
+     *  @param bits The number of bits in a word (5-8; default = 8)
+     *  @param parity The parity used (Serial::None, Serial::Odd, Serial::Even, Serial::Forced1, Serial::Forced0; default = Serial::None)
+     *  @param stop The number of stop bits (1 or 2; default = 1)
+     */
+    void format(int bits = 8, SerialParity parity=ParityNone, int stop_bits=1) {
+        serial_format(&_serial, bits, parity, stop_bits);
+    }
+
+    /** Determine if there is a character available to read
+     *
+     *  @returns
+     *    1 if there is a character available to read,
+     *    0 otherwise
+     */
+    int readable() {
+        return serial_readable(&_serial);
+    }
+
+    /** Determine if there is space available to write a character
+     * 
+     *  @returns
+     *    1 if there is space to write a character,
+     *    0 otherwise
+     */
+    int writeable() {
+        return serial_writable(&_serial);
+    }
+
+    /** Attach a function to call whenever a serial interrupt is generated
+     *
+     *  @param fptr A pointer to a void function, or 0 to set as none
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     */
+    void attach(void (*fptr)(void), SerialIrq type=RxIrq) {
+        if (fptr) {
+            _irq[type].attach(fptr);
+            serial_irq_set(&_serial, type, 1);
+        } else {
+            serial_irq_set(&_serial, type, 0);
+        }
+    }
+
+    /** Attach a member function to call whenever a serial interrupt is generated
+     *     
+     *  @param tptr pointer to the object to call the member function on
+     *  @param mptr pointer to the member function to be called
+     *  @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty)
+     */
+    template<typename T>
+    void attach(T* tptr, void (T::*mptr)(void), SerialIrq type=RxIrq) {
+        if((mptr != NULL) && (tptr != NULL)) {
+            _irq[type].attach(tptr, mptr);
+            serial_irq_set(&_serial, type, 1);
+        }
+    }
+    
+    static void _irq_handler(uint32_t id, SerialIrq irq_type) {
+        Serial *handler = (Serial*)id;
+        handler->_irq[irq_type].call();
+    }
+
+protected:
+    virtual int _getc() {
+        return serial_getc(&_serial);
+    }
+    
+    virtual int _putc(int c) {
+        serial_putc(&_serial, c);
+        return c;
+    }
+    
+    serial_t   _serial;
+    FunctionPointer _irq[2];
+};
+
+} // namespace mbed
+
+#endif
+
+#endif