u-blox / gnss

This class provides an API to communicate with a u-blox GNSS chip. The files here were originally part of the C027_Support library (https://developer.mbed.org/teams/ublox/code/C027_Support/ at revision 138:dafbbf31bf76) but have been separated out, primarily for use on the u-blox C030 board where the cellular interace portion of the C027_Support library will instead be provided through the new mbed Cellular API.

Dependents:   example-ublox-at-cellular-interface-ext example-low-power-sleep example-C030-out-of-box-demo example-C030-out-of-box-demo ... more

serial_pipe.cpp@2:b10ca4aa2e5e, 2017-04-13 (annotated)

Committer:
RobMeades
Date:
Thu Apr 13 14:45:17 2017 +0000
Revision:
2:b10ca4aa2e5e
Parent:
1:ef70a58a6c98 
Remove deprecation warnings and warning about lack of bracing around empty else condition.  Changed bracing style to ARM standard.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rob.meades@u-blox.com 1:ef70a58a6c98 1 /* Copyright (c) 2017 Michael Ammann
rob.meades@u-blox.com 1:ef70a58a6c98 2 *
rob.meades@u-blox.com 1:ef70a58a6c98 3 * Licensed under the Apache License, Version 2.0 (the "License");
rob.meades@u-blox.com 1:ef70a58a6c98 4 * you may not use this file except in compliance with the License.
rob.meades@u-blox.com 1:ef70a58a6c98 5 * You may obtain a copy of the License at
rob.meades@u-blox.com 1:ef70a58a6c98 6 *
rob.meades@u-blox.com 1:ef70a58a6c98 7 * http://www.apache.org/licenses/LICENSE-2.0
rob.meades@u-blox.com 1:ef70a58a6c98 8 *
rob.meades@u-blox.com 1:ef70a58a6c98 9 * Unless required by applicable law or agreed to in writing, software
rob.meades@u-blox.com 1:ef70a58a6c98 10 * distributed under the License is distributed on an "AS IS" BASIS,
rob.meades@u-blox.com 1:ef70a58a6c98 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rob.meades@u-blox.com 1:ef70a58a6c98 12 * See the License for the specific language governing permissions and
rob.meades@u-blox.com 1:ef70a58a6c98 13 * limitations under the License.
rob.meades@u-blox.com 1:ef70a58a6c98 14 */
rob.meades@u-blox.com 1:ef70a58a6c98 15
rob.meades@u-blox.com 1:ef70a58a6c98 16 #include "serial_pipe.h"
rob.meades@u-blox.com 1:ef70a58a6c98 17
rob.meades@u-blox.com 1:ef70a58a6c98 18 SerialPipe::SerialPipe(PinName tx, PinName rx, int baudrate, int rxSize, int txSize) :
rob.meades@u-blox.com 1:ef70a58a6c98 19 _SerialPipeBase(tx, rx, baudrate),
rob.meades@u-blox.com 1:ef70a58a6c98 20 _pipeRx( (rx!=NC) ? rxSize : 0),
rob.meades@u-blox.com 1:ef70a58a6c98 21 _pipeTx( (tx!=NC) ? txSize : 0)
rob.meades@u-blox.com 1:ef70a58a6c98 22 {
RobMeades 2:b10ca4aa2e5e 23 if (rx!=NC) {
RobMeades 2:b10ca4aa2e5e 24 attach(callback(this, &SerialPipe::rxIrqBuf), RxIrq);
RobMeades 2:b10ca4aa2e5e 25 }
rob.meades@u-blox.com 1:ef70a58a6c98 26 }
rob.meades@u-blox.com 1:ef70a58a6c98 27
rob.meades@u-blox.com 1:ef70a58a6c98 28 SerialPipe::~SerialPipe(void)
rob.meades@u-blox.com 1:ef70a58a6c98 29 {
rob.meades@u-blox.com 1:ef70a58a6c98 30 attach(NULL, RxIrq);
rob.meades@u-blox.com 1:ef70a58a6c98 31 attach(NULL, TxIrq);
rob.meades@u-blox.com 1:ef70a58a6c98 32 }
rob.meades@u-blox.com 1:ef70a58a6c98 33
rob.meades@u-blox.com 1:ef70a58a6c98 34 // tx channel
rob.meades@u-blox.com 1:ef70a58a6c98 35 int SerialPipe::writeable(void)
rob.meades@u-blox.com 1:ef70a58a6c98 36 {
rob.meades@u-blox.com 1:ef70a58a6c98 37 return _pipeTx.free();
rob.meades@u-blox.com 1:ef70a58a6c98 38 }
rob.meades@u-blox.com 1:ef70a58a6c98 39
rob.meades@u-blox.com 1:ef70a58a6c98 40 int SerialPipe::putc(int c)
rob.meades@u-blox.com 1:ef70a58a6c98 41 {
rob.meades@u-blox.com 1:ef70a58a6c98 42 c = _pipeTx.putc(c);
rob.meades@u-blox.com 1:ef70a58a6c98 43 txStart();
rob.meades@u-blox.com 1:ef70a58a6c98 44 return c;
rob.meades@u-blox.com 1:ef70a58a6c98 45 }
rob.meades@u-blox.com 1:ef70a58a6c98 46
rob.meades@u-blox.com 1:ef70a58a6c98 47 int SerialPipe::put(const void* buffer, int length, bool blocking)
rob.meades@u-blox.com 1:ef70a58a6c98 48 {
rob.meades@u-blox.com 1:ef70a58a6c98 49 int count = length;
rob.meades@u-blox.com 1:ef70a58a6c98 50 const char* ptr = (const char*)buffer;
RobMeades 2:b10ca4aa2e5e 51 if (count) {
RobMeades 2:b10ca4aa2e5e 52 do {
rob.meades@u-blox.com 1:ef70a58a6c98 53 int written = _pipeTx.put(ptr, count, false);
rob.meades@u-blox.com 1:ef70a58a6c98 54 if (written) {
rob.meades@u-blox.com 1:ef70a58a6c98 55 ptr += written;
rob.meades@u-blox.com 1:ef70a58a6c98 56 count -= written;
rob.meades@u-blox.com 1:ef70a58a6c98 57 txStart();
rob.meades@u-blox.com 1:ef70a58a6c98 58 }
RobMeades 2:b10ca4aa2e5e 59 else if (!blocking) {
RobMeades 2:b10ca4aa2e5e 60 /* nothing / just wait */;
rob.meades@u-blox.com 1:ef70a58a6c98 61 break;
RobMeades 2:b10ca4aa2e5e 62 }
rob.meades@u-blox.com 1:ef70a58a6c98 63 }
rob.meades@u-blox.com 1:ef70a58a6c98 64 while (count);
rob.meades@u-blox.com 1:ef70a58a6c98 65 }
RobMeades 2:b10ca4aa2e5e 66
rob.meades@u-blox.com 1:ef70a58a6c98 67 return (length - count);
rob.meades@u-blox.com 1:ef70a58a6c98 68 }
rob.meades@u-blox.com 1:ef70a58a6c98 69
rob.meades@u-blox.com 1:ef70a58a6c98 70 void SerialPipe::txCopy(void)
rob.meades@u-blox.com 1:ef70a58a6c98 71 {
RobMeades 2:b10ca4aa2e5e 72 while (_SerialPipeBase::writeable() && _pipeTx.readable()) {
rob.meades@u-blox.com 1:ef70a58a6c98 73 char c = _pipeTx.getc();
rob.meades@u-blox.com 1:ef70a58a6c98 74 _SerialPipeBase::_base_putc(c);
rob.meades@u-blox.com 1:ef70a58a6c98 75 }
rob.meades@u-blox.com 1:ef70a58a6c98 76 }
rob.meades@u-blox.com 1:ef70a58a6c98 77
rob.meades@u-blox.com 1:ef70a58a6c98 78 void SerialPipe::txIrqBuf(void)
rob.meades@u-blox.com 1:ef70a58a6c98 79 {
rob.meades@u-blox.com 1:ef70a58a6c98 80 txCopy();
rob.meades@u-blox.com 1:ef70a58a6c98 81 // detach tx isr if we are done
RobMeades 2:b10ca4aa2e5e 82 if (!_pipeTx.readable()) {
rob.meades@u-blox.com 1:ef70a58a6c98 83 attach(NULL, TxIrq);
RobMeades 2:b10ca4aa2e5e 84 }
rob.meades@u-blox.com 1:ef70a58a6c98 85 }
rob.meades@u-blox.com 1:ef70a58a6c98 86
rob.meades@u-blox.com 1:ef70a58a6c98 87 void SerialPipe::txStart(void)
rob.meades@u-blox.com 1:ef70a58a6c98 88 {
rob.meades@u-blox.com 1:ef70a58a6c98 89 // disable the tx isr to avoid interruption
rob.meades@u-blox.com 1:ef70a58a6c98 90 attach(NULL, TxIrq);
rob.meades@u-blox.com 1:ef70a58a6c98 91 txCopy();
rob.meades@u-blox.com 1:ef70a58a6c98 92 // attach the tx isr to handle the remaining data
RobMeades 2:b10ca4aa2e5e 93 if (_pipeTx.readable()) {
RobMeades 2:b10ca4aa2e5e 94 attach(callback(this, &SerialPipe::txIrqBuf), TxIrq);
RobMeades 2:b10ca4aa2e5e 95 }
rob.meades@u-blox.com 1:ef70a58a6c98 96 }
rob.meades@u-blox.com 1:ef70a58a6c98 97
rob.meades@u-blox.com 1:ef70a58a6c98 98 // rx channel
rob.meades@u-blox.com 1:ef70a58a6c98 99 int SerialPipe::readable(void)
rob.meades@u-blox.com 1:ef70a58a6c98 100 {
rob.meades@u-blox.com 1:ef70a58a6c98 101 return _pipeRx.readable();
rob.meades@u-blox.com 1:ef70a58a6c98 102 }
rob.meades@u-blox.com 1:ef70a58a6c98 103
rob.meades@u-blox.com 1:ef70a58a6c98 104 int SerialPipe::getc(void)
rob.meades@u-blox.com 1:ef70a58a6c98 105 {
RobMeades 2:b10ca4aa2e5e 106 if (!_pipeRx.readable()) {
rob.meades@u-blox.com 1:ef70a58a6c98 107 return EOF;
RobMeades 2:b10ca4aa2e5e 108 }
RobMeades 2:b10ca4aa2e5e 109
rob.meades@u-blox.com 1:ef70a58a6c98 110 return _pipeRx.getc();
rob.meades@u-blox.com 1:ef70a58a6c98 111 }
rob.meades@u-blox.com 1:ef70a58a6c98 112
rob.meades@u-blox.com 1:ef70a58a6c98 113 int SerialPipe::get(void* buffer, int length, bool blocking)
rob.meades@u-blox.com 1:ef70a58a6c98 114 {
rob.meades@u-blox.com 1:ef70a58a6c98 115 return _pipeRx.get((char*)buffer,length,blocking);
rob.meades@u-blox.com 1:ef70a58a6c98 116 }
rob.meades@u-blox.com 1:ef70a58a6c98 117
rob.meades@u-blox.com 1:ef70a58a6c98 118 void SerialPipe::rxIrqBuf(void)
rob.meades@u-blox.com 1:ef70a58a6c98 119 {
rob.meades@u-blox.com 1:ef70a58a6c98 120 while (_SerialPipeBase::readable())
rob.meades@u-blox.com 1:ef70a58a6c98 121 {
rob.meades@u-blox.com 1:ef70a58a6c98 122 char c = _SerialPipeBase::_base_getc();
RobMeades 2:b10ca4aa2e5e 123 if (_pipeRx.writeable()) {
rob.meades@u-blox.com 1:ef70a58a6c98 124 _pipeRx.putc(c);
RobMeades 2:b10ca4aa2e5e 125 } else {
RobMeades 2:b10ca4aa2e5e 126 /* overflow */
RobMeades 2:b10ca4aa2e5e 127 }
rob.meades@u-blox.com 1:ef70a58a6c98 128 }
rob.meades@u-blox.com 1:ef70a58a6c98 129 }