Debugged library and example main
Dependencies: MX106_not_working mbed-src AX12_final comunication_1
Fork of MX106-custom by
SerialHalfDuplex.cpp
- Committer:
- ilaria
- Date:
- 2016-04-26
- Revision:
- 1:946c65496383
File content as of revision 1:946c65496383:
/* 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; 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::_getc(void) { return Serial::_getc(); } } // End namespace #endif