marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

common/Serial.cpp@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
10:3bc89ef62ce7
Child:
15:4892fe388435
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #include "Serial.h"
bogdanm 13:0645d8841f51 17 #include "wait_api.h"
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #if DEVICE_SERIAL
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 namespace mbed {
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 Serial::Serial(PinName tx, PinName rx, const char *name) : Stream(name) {
bogdanm 13:0645d8841f51 24 serial_init(&_serial, tx, rx);
bogdanm 13:0645d8841f51 25 _baud = 9600;
bogdanm 13:0645d8841f51 26 serial_irq_handler(&_serial, Serial::_irq_handler, (uint32_t)this);
bogdanm 13:0645d8841f51 27 }
bogdanm 13:0645d8841f51 28
bogdanm 13:0645d8841f51 29 void Serial::baud(int baudrate) {
bogdanm 13:0645d8841f51 30 serial_baud(&_serial, baudrate);
bogdanm 13:0645d8841f51 31 _baud = baudrate;
bogdanm 13:0645d8841f51 32 }
bogdanm 13:0645d8841f51 33
bogdanm 13:0645d8841f51 34 void Serial::format(int bits, Parity parity, int stop_bits) {
bogdanm 13:0645d8841f51 35 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
bogdanm 13:0645d8841f51 36 }
bogdanm 13:0645d8841f51 37
bogdanm 13:0645d8841f51 38 int Serial::readable() {
bogdanm 13:0645d8841f51 39 return serial_readable(&_serial);
bogdanm 13:0645d8841f51 40 }
bogdanm 13:0645d8841f51 41
bogdanm 13:0645d8841f51 42
bogdanm 13:0645d8841f51 43 int Serial::writeable() {
bogdanm 13:0645d8841f51 44 return serial_writable(&_serial);
bogdanm 13:0645d8841f51 45 }
bogdanm 13:0645d8841f51 46
bogdanm 13:0645d8841f51 47 void Serial::attach(void (*fptr)(void), IrqType type) {
bogdanm 13:0645d8841f51 48 if (fptr) {
bogdanm 13:0645d8841f51 49 _irq[type].attach(fptr);
bogdanm 13:0645d8841f51 50 serial_irq_set(&_serial, (SerialIrq)type, 1);
bogdanm 13:0645d8841f51 51 } else {
bogdanm 13:0645d8841f51 52 serial_irq_set(&_serial, (SerialIrq)type, 0);
bogdanm 13:0645d8841f51 53 }
bogdanm 13:0645d8841f51 54 }
bogdanm 13:0645d8841f51 55
bogdanm 13:0645d8841f51 56
bogdanm 13:0645d8841f51 57 void Serial::_irq_handler(uint32_t id, SerialIrq irq_type) {
bogdanm 13:0645d8841f51 58 Serial *handler = (Serial*)id;
bogdanm 13:0645d8841f51 59 handler->_irq[irq_type].call();
bogdanm 13:0645d8841f51 60 }
bogdanm 13:0645d8841f51 61
bogdanm 13:0645d8841f51 62 int Serial::_getc() {
bogdanm 13:0645d8841f51 63 return serial_getc(&_serial);
bogdanm 13:0645d8841f51 64 }
bogdanm 13:0645d8841f51 65
bogdanm 13:0645d8841f51 66 int Serial::_putc(int c) {
bogdanm 13:0645d8841f51 67 serial_putc(&_serial, c);
bogdanm 13:0645d8841f51 68 return c;
bogdanm 13:0645d8841f51 69 }
bogdanm 13:0645d8841f51 70
bogdanm 13:0645d8841f51 71 void Serial::send_break() {
bogdanm 13:0645d8841f51 72 // Wait for 1.5 frames before clearing the break condition
bogdanm 13:0645d8841f51 73 // This will have different effects on our platforms, but should
bogdanm 13:0645d8841f51 74 // ensure that we keep the break active for at least one frame.
bogdanm 13:0645d8841f51 75 // We consider a full frame (1 start bit + 8 data bits bits +
bogdanm 13:0645d8841f51 76 // 1 parity bit + 2 stop bits = 12 bits) for computation.
bogdanm 13:0645d8841f51 77 // One bit time (in us) = 1000000/_baud
bogdanm 13:0645d8841f51 78 // Twelve bits: 12000000/baud delay
bogdanm 13:0645d8841f51 79 // 1.5 frames: 18000000/baud delay
bogdanm 13:0645d8841f51 80 serial_break_set(&_serial);
bogdanm 13:0645d8841f51 81 wait_us(18000000/_baud);
bogdanm 13:0645d8841f51 82 serial_break_clear(&_serial);
bogdanm 13:0645d8841f51 83 }
bogdanm 13:0645d8841f51 84
bogdanm 13:0645d8841f51 85 } // namespace mbed
bogdanm 13:0645d8841f51 86
bogdanm 13:0645d8841f51 87 #endif