Bei Chen Liu / mbed-src

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common/SerialBase.cpp@36:ab3ee77451e7, 2013-10-23 (annotated)

Committer:
mbed_official
Date:
Wed Oct 23 14:15:04 2013 +0100
Revision:
36:ab3ee77451e7
Child:
64:7b352733b00a
Synchronized with git revision 2404dc0092fa583d899df3d9021a4ddb4510b011

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 36:ab3ee77451e7 1 /* mbed Microcontroller Library
mbed_official 36:ab3ee77451e7 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 36:ab3ee77451e7 3 *
mbed_official 36:ab3ee77451e7 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 36:ab3ee77451e7 5 * you may not use this file except in compliance with the License.
mbed_official 36:ab3ee77451e7 6 * You may obtain a copy of the License at
mbed_official 36:ab3ee77451e7 7 *
mbed_official 36:ab3ee77451e7 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 36:ab3ee77451e7 9 *
mbed_official 36:ab3ee77451e7 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 36:ab3ee77451e7 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 36:ab3ee77451e7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 36:ab3ee77451e7 13 * See the License for the specific language governing permissions and
mbed_official 36:ab3ee77451e7 14 * limitations under the License.
mbed_official 36:ab3ee77451e7 15 */
mbed_official 36:ab3ee77451e7 16 #include "SerialBase.h"
mbed_official 36:ab3ee77451e7 17 #include "wait_api.h"
mbed_official 36:ab3ee77451e7 18
mbed_official 36:ab3ee77451e7 19 #if DEVICE_SERIAL
mbed_official 36:ab3ee77451e7 20
mbed_official 36:ab3ee77451e7 21 namespace mbed {
mbed_official 36:ab3ee77451e7 22
mbed_official 36:ab3ee77451e7 23 SerialBase::SerialBase(PinName tx, PinName rx) {
mbed_official 36:ab3ee77451e7 24 serial_init(&_serial, tx, rx);
mbed_official 36:ab3ee77451e7 25 _baud = 9600;
mbed_official 36:ab3ee77451e7 26 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
mbed_official 36:ab3ee77451e7 27 }
mbed_official 36:ab3ee77451e7 28
mbed_official 36:ab3ee77451e7 29 void SerialBase::baud(int baudrate) {
mbed_official 36:ab3ee77451e7 30 serial_baud(&_serial, baudrate);
mbed_official 36:ab3ee77451e7 31 _baud = baudrate;
mbed_official 36:ab3ee77451e7 32 }
mbed_official 36:ab3ee77451e7 33
mbed_official 36:ab3ee77451e7 34 void SerialBase::format(int bits, Parity parity, int stop_bits) {
mbed_official 36:ab3ee77451e7 35 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
mbed_official 36:ab3ee77451e7 36 }
mbed_official 36:ab3ee77451e7 37
mbed_official 36:ab3ee77451e7 38 int SerialBase::readable() {
mbed_official 36:ab3ee77451e7 39 return serial_readable(&_serial);
mbed_official 36:ab3ee77451e7 40 }
mbed_official 36:ab3ee77451e7 41
mbed_official 36:ab3ee77451e7 42
mbed_official 36:ab3ee77451e7 43 int SerialBase::writeable() {
mbed_official 36:ab3ee77451e7 44 return serial_writable(&_serial);
mbed_official 36:ab3ee77451e7 45 }
mbed_official 36:ab3ee77451e7 46
mbed_official 36:ab3ee77451e7 47 void SerialBase::attach(void (*fptr)(void), IrqType type) {
mbed_official 36:ab3ee77451e7 48 if (fptr) {
mbed_official 36:ab3ee77451e7 49 _irq[type].attach(fptr);
mbed_official 36:ab3ee77451e7 50 serial_irq_set(&_serial, (SerialIrq)type, 1);
mbed_official 36:ab3ee77451e7 51 } else {
mbed_official 36:ab3ee77451e7 52 serial_irq_set(&_serial, (SerialIrq)type, 0);
mbed_official 36:ab3ee77451e7 53 }
mbed_official 36:ab3ee77451e7 54 }
mbed_official 36:ab3ee77451e7 55
mbed_official 36:ab3ee77451e7 56 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
mbed_official 36:ab3ee77451e7 57 SerialBase *handler = (SerialBase*)id;
mbed_official 36:ab3ee77451e7 58 handler->_irq[irq_type].call();
mbed_official 36:ab3ee77451e7 59 }
mbed_official 36:ab3ee77451e7 60
mbed_official 36:ab3ee77451e7 61 int SerialBase::_base_getc() {
mbed_official 36:ab3ee77451e7 62 return serial_getc(&_serial);
mbed_official 36:ab3ee77451e7 63 }
mbed_official 36:ab3ee77451e7 64
mbed_official 36:ab3ee77451e7 65 int SerialBase::_base_putc(int c) {
mbed_official 36:ab3ee77451e7 66 serial_putc(&_serial, c);
mbed_official 36:ab3ee77451e7 67 return c;
mbed_official 36:ab3ee77451e7 68 }
mbed_official 36:ab3ee77451e7 69
mbed_official 36:ab3ee77451e7 70 void SerialBase::send_break() {
mbed_official 36:ab3ee77451e7 71 // Wait for 1.5 frames before clearing the break condition
mbed_official 36:ab3ee77451e7 72 // This will have different effects on our platforms, but should
mbed_official 36:ab3ee77451e7 73 // ensure that we keep the break active for at least one frame.
mbed_official 36:ab3ee77451e7 74 // We consider a full frame (1 start bit + 8 data bits bits +
mbed_official 36:ab3ee77451e7 75 // 1 parity bit + 2 stop bits = 12 bits) for computation.
mbed_official 36:ab3ee77451e7 76 // One bit time (in us) = 1000000/_baud
mbed_official 36:ab3ee77451e7 77 // Twelve bits: 12000000/baud delay
mbed_official 36:ab3ee77451e7 78 // 1.5 frames: 18000000/baud delay
mbed_official 36:ab3ee77451e7 79 serial_break_set(&_serial);
mbed_official 36:ab3ee77451e7 80 wait_us(18000000/_baud);
mbed_official 36:ab3ee77451e7 81 serial_break_clear(&_serial);
mbed_official 36:ab3ee77451e7 82 }
mbed_official 36:ab3ee77451e7 83
mbed_official 36:ab3ee77451e7 84 } // namespace mbed
mbed_official 36:ab3ee77451e7 85
mbed_official 36:ab3ee77451e7 86 #endif