Diff: SerialHalfDuplex.cpp

Revision:

2:242a54f3629b

Parent:

1:7ce196329ced

--- a/SerialHalfDuplex.cpp	Sun Mar 25 20:38:37 2018 +0000
+++ b/SerialHalfDuplex.cpp	Wed Apr 25 17:13:38 2018 +0000
@@ -1,77 +1,16 @@
-/* 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.
- *
- * NOTE: This is an unsupported legacy untested library.
- */
 #include "SerialHalfDuplex.h"
 
-#if DEVICE_SERIAL
-
-#include "mbed.h"
-#include "pinmap.h"
-#include "serial_api.h"
-#include "gpio_api.h"
-
-namespace mbed {
-
-SerialHalfDuplex::SerialHalfDuplex(PinName tx, PinName rx, const char *name)
-    : Serial(tx, rx, name) {
-    _txpin = tx;
+SerialHalfDuplex::SerialHalfDuplex(PinName tx, PinName rx) : out(tx, NC, 1000000), in(NC, rx, 1000000) {
     
-    DigitalIn TXPIN(_txpin);         // set as input 
-    pin_mode(_txpin, PullNone); // no pull
-    pin_function(_txpin, 0);    // set as gpio
 }
 
-// To transmit a byte in half duplex mode:
-// 1. Disable interrupts, so we don't trigger on loopback byte
-// 2. Set tx pin to UART out
-// 3. Transmit byte as normal
-// 4. Read back byte from looped back tx pin - this both confirms that the
-//    transmit has occurred, and also clears the byte from the buffer.
-// 5. Return pin to input mode
-// 6. Re-enable interrupts
-
-int SerialHalfDuplex::_putc(int c) {
-    int retc;
-    
-    // TODO: We should not disable all interrupts
-    __disable_irq();
-    
-    serial_pinout_tx(_txpin);
-    
-    Serial::_putc(c);
-    retc = Serial::getc();       // reading also clears any interrupt
-    
-    pin_function(_txpin, 0);
-    
-    __enable_irq();
-    
-    return retc;
+int SerialHalfDuplex::putc(int byte) {
+    out.putc(byte);
+    while(in.readable()) {
+        in.getc();
+    }
 }
 
-int SerialHalfDuplex::_getc(void) {
-    return Serial::_getc();
-}
-
-} // End namespace
-
-#endif
+int SerialHalfDuplex::getc() {
+    return 0;
+}
\ No newline at end of file