Diff: SerialHalfDuplex.cpp

Revision:

1:8fd1fa67565e

Parent:

0:7802a25daf3b

Child:

2:5ecc72a47df0

--- a/SerialHalfDuplex.cpp	Thu Dec 06 12:46:52 2012 +0000
+++ b/SerialHalfDuplex.cpp	Wed Apr 03 16:42:49 2013 +0000
@@ -1,76 +1,77 @@
-/* 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 "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;
-    
-    gpio_input(_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::_getc(void) {
-    return Serial::_getc();
-}
-
-} // End namespace
-
-#endif
+/* 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 "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;
+    
+    //gpio_input(_txpin);         // set as input 
+    gpio_set(_txpin); 
+    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::_getc(void) {
+    return Serial::_getc();
+}
+
+} // End namespace
+
+#endif