Lancaster University / mbed-src

Lancaster University's (short term!) clone of mbed-src for micro:bit. This is a copy of the github branch https://github.com/lancaster-university/mbed-classic

Fork of mbed-src by mbed official

common/SerialBase.cpp@212:34d62c0b2af6, 2014-05-26 (annotated)

Committer:
mbed_official
Date:
Mon May 26 18:15:07 2014 +0100
Revision:
212:34d62c0b2af6
Parent:
192:42b1a45e48aa
Child:
525:c320967f86b9
Synchronized with git revision f65b7d907785089e8dd942446f1c974b3a213a39



Full URL: https://github.com/mbedmicro/mbed/commit/f65b7d907785089e8dd942446f1c974b3a213a39/

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 212:34d62c0b2af6 23 SerialBase::SerialBase(PinName tx, PinName rx) : _serial(), _baud(9600) {
mbed_official 36:ab3ee77451e7 24 serial_init(&_serial, tx, rx);
mbed_official 36:ab3ee77451e7 25 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
mbed_official 36:ab3ee77451e7 26 }
mbed_official 36:ab3ee77451e7 27
mbed_official 36:ab3ee77451e7 28 void SerialBase::baud(int baudrate) {
mbed_official 36:ab3ee77451e7 29 serial_baud(&_serial, baudrate);
mbed_official 36:ab3ee77451e7 30 _baud = baudrate;
mbed_official 36:ab3ee77451e7 31 }
mbed_official 36:ab3ee77451e7 32
mbed_official 36:ab3ee77451e7 33 void SerialBase::format(int bits, Parity parity, int stop_bits) {
mbed_official 36:ab3ee77451e7 34 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
mbed_official 36:ab3ee77451e7 35 }
mbed_official 36:ab3ee77451e7 36
mbed_official 36:ab3ee77451e7 37 int SerialBase::readable() {
mbed_official 36:ab3ee77451e7 38 return serial_readable(&_serial);
mbed_official 36:ab3ee77451e7 39 }
mbed_official 36:ab3ee77451e7 40
mbed_official 36:ab3ee77451e7 41
mbed_official 36:ab3ee77451e7 42 int SerialBase::writeable() {
mbed_official 36:ab3ee77451e7 43 return serial_writable(&_serial);
mbed_official 36:ab3ee77451e7 44 }
mbed_official 36:ab3ee77451e7 45
mbed_official 36:ab3ee77451e7 46 void SerialBase::attach(void (*fptr)(void), IrqType type) {
mbed_official 36:ab3ee77451e7 47 if (fptr) {
mbed_official 36:ab3ee77451e7 48 _irq[type].attach(fptr);
mbed_official 36:ab3ee77451e7 49 serial_irq_set(&_serial, (SerialIrq)type, 1);
mbed_official 36:ab3ee77451e7 50 } else {
mbed_official 36:ab3ee77451e7 51 serial_irq_set(&_serial, (SerialIrq)type, 0);
mbed_official 36:ab3ee77451e7 52 }
mbed_official 36:ab3ee77451e7 53 }
mbed_official 36:ab3ee77451e7 54
mbed_official 36:ab3ee77451e7 55 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
mbed_official 36:ab3ee77451e7 56 SerialBase *handler = (SerialBase*)id;
mbed_official 36:ab3ee77451e7 57 handler->_irq[irq_type].call();
mbed_official 36:ab3ee77451e7 58 }
mbed_official 36:ab3ee77451e7 59
mbed_official 36:ab3ee77451e7 60 int SerialBase::_base_getc() {
mbed_official 36:ab3ee77451e7 61 return serial_getc(&_serial);
mbed_official 36:ab3ee77451e7 62 }
mbed_official 36:ab3ee77451e7 63
mbed_official 36:ab3ee77451e7 64 int SerialBase::_base_putc(int c) {
mbed_official 36:ab3ee77451e7 65 serial_putc(&_serial, c);
mbed_official 36:ab3ee77451e7 66 return c;
mbed_official 36:ab3ee77451e7 67 }
mbed_official 36:ab3ee77451e7 68
mbed_official 36:ab3ee77451e7 69 void SerialBase::send_break() {
mbed_official 36:ab3ee77451e7 70 // Wait for 1.5 frames before clearing the break condition
mbed_official 36:ab3ee77451e7 71 // This will have different effects on our platforms, but should
mbed_official 36:ab3ee77451e7 72 // ensure that we keep the break active for at least one frame.
mbed_official 212:34d62c0b2af6 73 // We consider a full frame (1 start bit + 8 data bits bits +
mbed_official 36:ab3ee77451e7 74 // 1 parity bit + 2 stop bits = 12 bits) for computation.
mbed_official 36:ab3ee77451e7 75 // One bit time (in us) = 1000000/_baud
mbed_official 36:ab3ee77451e7 76 // Twelve bits: 12000000/baud delay
mbed_official 36:ab3ee77451e7 77 // 1.5 frames: 18000000/baud delay
mbed_official 36:ab3ee77451e7 78 serial_break_set(&_serial);
mbed_official 36:ab3ee77451e7 79 wait_us(18000000/_baud);
mbed_official 36:ab3ee77451e7 80 serial_break_clear(&_serial);
mbed_official 36:ab3ee77451e7 81 }
mbed_official 36:ab3ee77451e7 82
mbed_official 192:42b1a45e48aa 83 #if DEVICE_SERIAL_FC
mbed_official 64:7b352733b00a 84 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
mbed_official 64:7b352733b00a 85 FlowControl flow_type = (FlowControl)type;
mbed_official 64:7b352733b00a 86 switch(type) {
mbed_official 64:7b352733b00a 87 case RTS:
mbed_official 64:7b352733b00a 88 serial_set_flow_control(&_serial, flow_type, flow1, NC);
mbed_official 64:7b352733b00a 89 break;
mbed_official 212:34d62c0b2af6 90
mbed_official 64:7b352733b00a 91 case CTS:
mbed_official 64:7b352733b00a 92 serial_set_flow_control(&_serial, flow_type, NC, flow1);
mbed_official 64:7b352733b00a 93 break;
mbed_official 212:34d62c0b2af6 94
mbed_official 64:7b352733b00a 95 case RTSCTS:
mbed_official 65:46be7cdf873f 96 case Disabled:
mbed_official 64:7b352733b00a 97 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
mbed_official 64:7b352733b00a 98 break;
mbed_official 212:34d62c0b2af6 99
mbed_official 64:7b352733b00a 100 default:
mbed_official 64:7b352733b00a 101 break;
mbed_official 64:7b352733b00a 102 }
mbed_official 64:7b352733b00a 103 }
mbed_official 64:7b352733b00a 104 #endif
mbed_official 64:7b352733b00a 105
mbed_official 36:ab3ee77451e7 106 } // namespace mbed
mbed_official 36:ab3ee77451e7 107
mbed_official 36:ab3ee77451e7 108 #endif