Ermanno Brusadin / mbed-src

mbed library sources

common/SerialBase.cpp@0:0a673c671a56, 2016-07-27 (annotated)

Committer:
ebrus
Date:
Wed Jul 27 18:35:32 2016 +0000
Revision:
0:0a673c671a56
4

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ebrus 0:0a673c671a56 1 /* mbed Microcontroller Library
ebrus 0:0a673c671a56 2 * Copyright (c) 2006-2013 ARM Limited
ebrus 0:0a673c671a56 3 *
ebrus 0:0a673c671a56 4 * Licensed under the Apache License, Version 2.0 (the "License");
ebrus 0:0a673c671a56 5 * you may not use this file except in compliance with the License.
ebrus 0:0a673c671a56 6 * You may obtain a copy of the License at
ebrus 0:0a673c671a56 7 *
ebrus 0:0a673c671a56 8 * http://www.apache.org/licenses/LICENSE-2.0
ebrus 0:0a673c671a56 9 *
ebrus 0:0a673c671a56 10 * Unless required by applicable law or agreed to in writing, software
ebrus 0:0a673c671a56 11 * distributed under the License is distributed on an "AS IS" BASIS,
ebrus 0:0a673c671a56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ebrus 0:0a673c671a56 13 * See the License for the specific language governing permissions and
ebrus 0:0a673c671a56 14 * limitations under the License.
ebrus 0:0a673c671a56 15 */
ebrus 0:0a673c671a56 16 #include "SerialBase.h"
ebrus 0:0a673c671a56 17 #include "wait_api.h"
ebrus 0:0a673c671a56 18
ebrus 0:0a673c671a56 19 #if DEVICE_SERIAL
ebrus 0:0a673c671a56 20
ebrus 0:0a673c671a56 21 namespace mbed {
ebrus 0:0a673c671a56 22
ebrus 0:0a673c671a56 23 SerialBase::SerialBase(PinName tx, PinName rx) : _serial(), _baud(9600) {
ebrus 0:0a673c671a56 24 serial_init(&_serial, tx, rx);
ebrus 0:0a673c671a56 25 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
ebrus 0:0a673c671a56 26 }
ebrus 0:0a673c671a56 27
ebrus 0:0a673c671a56 28 void SerialBase::baud(int baudrate) {
ebrus 0:0a673c671a56 29 serial_baud(&_serial, baudrate);
ebrus 0:0a673c671a56 30 _baud = baudrate;
ebrus 0:0a673c671a56 31 }
ebrus 0:0a673c671a56 32
ebrus 0:0a673c671a56 33 void SerialBase::format(int bits, Parity parity, int stop_bits) {
ebrus 0:0a673c671a56 34 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
ebrus 0:0a673c671a56 35 }
ebrus 0:0a673c671a56 36
ebrus 0:0a673c671a56 37 int SerialBase::readable() {
ebrus 0:0a673c671a56 38 return serial_readable(&_serial);
ebrus 0:0a673c671a56 39 }
ebrus 0:0a673c671a56 40
ebrus 0:0a673c671a56 41
ebrus 0:0a673c671a56 42 int SerialBase::writeable() {
ebrus 0:0a673c671a56 43 return serial_writable(&_serial);
ebrus 0:0a673c671a56 44 }
ebrus 0:0a673c671a56 45
ebrus 0:0a673c671a56 46 void SerialBase::attach(void (*fptr)(void), IrqType type) {
ebrus 0:0a673c671a56 47 if (fptr) {
ebrus 0:0a673c671a56 48 _irq[type].attach(fptr);
ebrus 0:0a673c671a56 49 serial_irq_set(&_serial, (SerialIrq)type, 1);
ebrus 0:0a673c671a56 50 } else {
ebrus 0:0a673c671a56 51 serial_irq_set(&_serial, (SerialIrq)type, 0);
ebrus 0:0a673c671a56 52 }
ebrus 0:0a673c671a56 53 }
ebrus 0:0a673c671a56 54
ebrus 0:0a673c671a56 55 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
ebrus 0:0a673c671a56 56 SerialBase *handler = (SerialBase*)id;
ebrus 0:0a673c671a56 57 handler->_irq[irq_type].call();
ebrus 0:0a673c671a56 58 }
ebrus 0:0a673c671a56 59
ebrus 0:0a673c671a56 60 int SerialBase::_base_getc() {
ebrus 0:0a673c671a56 61 return serial_getc(&_serial);
ebrus 0:0a673c671a56 62 }
ebrus 0:0a673c671a56 63
ebrus 0:0a673c671a56 64 int SerialBase::_base_putc(int c) {
ebrus 0:0a673c671a56 65 serial_putc(&_serial, c);
ebrus 0:0a673c671a56 66 return c;
ebrus 0:0a673c671a56 67 }
ebrus 0:0a673c671a56 68
ebrus 0:0a673c671a56 69 void SerialBase::send_break() {
ebrus 0:0a673c671a56 70 // Wait for 1.5 frames before clearing the break condition
ebrus 0:0a673c671a56 71 // This will have different effects on our platforms, but should
ebrus 0:0a673c671a56 72 // ensure that we keep the break active for at least one frame.
ebrus 0:0a673c671a56 73 // We consider a full frame (1 start bit + 8 data bits bits +
ebrus 0:0a673c671a56 74 // 1 parity bit + 2 stop bits = 12 bits) for computation.
ebrus 0:0a673c671a56 75 // One bit time (in us) = 1000000/_baud
ebrus 0:0a673c671a56 76 // Twelve bits: 12000000/baud delay
ebrus 0:0a673c671a56 77 // 1.5 frames: 18000000/baud delay
ebrus 0:0a673c671a56 78 serial_break_set(&_serial);
ebrus 0:0a673c671a56 79 wait_us(18000000/_baud);
ebrus 0:0a673c671a56 80 serial_break_clear(&_serial);
ebrus 0:0a673c671a56 81 }
ebrus 0:0a673c671a56 82
ebrus 0:0a673c671a56 83 #if DEVICE_SERIAL_FC
ebrus 0:0a673c671a56 84 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
ebrus 0:0a673c671a56 85 FlowControl flow_type = (FlowControl)type;
ebrus 0:0a673c671a56 86 switch(type) {
ebrus 0:0a673c671a56 87 case RTS:
ebrus 0:0a673c671a56 88 serial_set_flow_control(&_serial, flow_type, flow1, NC);
ebrus 0:0a673c671a56 89 break;
ebrus 0:0a673c671a56 90
ebrus 0:0a673c671a56 91 case CTS:
ebrus 0:0a673c671a56 92 serial_set_flow_control(&_serial, flow_type, NC, flow1);
ebrus 0:0a673c671a56 93 break;
ebrus 0:0a673c671a56 94
ebrus 0:0a673c671a56 95 case RTSCTS:
ebrus 0:0a673c671a56 96 case Disabled:
ebrus 0:0a673c671a56 97 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
ebrus 0:0a673c671a56 98 break;
ebrus 0:0a673c671a56 99
ebrus 0:0a673c671a56 100 default:
ebrus 0:0a673c671a56 101 break;
ebrus 0:0a673c671a56 102 }
ebrus 0:0a673c671a56 103 }
ebrus 0:0a673c671a56 104 #endif
ebrus 0:0a673c671a56 105
ebrus 0:0a673c671a56 106 } // namespace mbed
ebrus 0:0a673c671a56 107
ebrus 0:0a673c671a56 108 #endif