Ward Mattar / Mbed 2 deprecated Formula_LoRa_Transmitter

This is code is part of a Technion course project in advanced IoT, implementing a device to read and transmit sensors data from a Formula racing car built by students at Technion - Israel Institute of Technology.

Dependencies:   mbed Buffer

Fork of DISCO-L072CZ-LRWAN1_LoRa_PingPong by ST

This is code is part of a Technion course project in advanced IoT, implementing a device to read and transmit sensors data from a Formula racing car built by students at Technion - Israel Institute of Technology.

How to install

  • Create an account on Mbed: https://os.mbed.com/account/signup/
  • Import project into Compiler
  • In the Program Workspace select "Formula_Nucleo_Reader"
  • Select a Platform like so:
  1. Click button at top-left
  2. Add Board
  3. Search "B-L072Z-LRWAN1" and then "Add to your Mbed Compiler"
  • Finally click "Compile", if the build was successful, the binary would download automatically
  • To install it on device simply plug it in to a PC, open device drive and drag then drop binary file in it

BufferedSerial/BufferedSerial.cpp@12:02d779e8c4f6, 2018-05-19 (annotated)

Committer:
wardm
Date:
Sat May 19 11:41:10 2018 +0000
Revision:
12:02d779e8c4f6
Code for Technion Formula car sensors reader transmit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wardm 12:02d779e8c4f6 1 /**
wardm 12:02d779e8c4f6 2 * @file BufferedSerial.cpp
wardm 12:02d779e8c4f6 3 * @brief Software Buffer - Extends mbed Serial functionallity adding irq driven TX and RX
wardm 12:02d779e8c4f6 4 * @author sam grove
wardm 12:02d779e8c4f6 5 * @version 1.0
wardm 12:02d779e8c4f6 6 * @see
wardm 12:02d779e8c4f6 7 *
wardm 12:02d779e8c4f6 8 * Copyright (c) 2013
wardm 12:02d779e8c4f6 9 *
wardm 12:02d779e8c4f6 10 * Licensed under the Apache License, Version 2.0 (the "License");
wardm 12:02d779e8c4f6 11 * you may not use this file except in compliance with the License.
wardm 12:02d779e8c4f6 12 * You may obtain a copy of the License at
wardm 12:02d779e8c4f6 13 *
wardm 12:02d779e8c4f6 14 * http://www.apache.org/licenses/LICENSE-2.0
wardm 12:02d779e8c4f6 15 *
wardm 12:02d779e8c4f6 16 * Unless required by applicable law or agreed to in writing, software
wardm 12:02d779e8c4f6 17 * distributed under the License is distributed on an "AS IS" BASIS,
wardm 12:02d779e8c4f6 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
wardm 12:02d779e8c4f6 19 * See the License for the specific language governing permissions and
wardm 12:02d779e8c4f6 20 * limitations under the License.
wardm 12:02d779e8c4f6 21 */
wardm 12:02d779e8c4f6 22
wardm 12:02d779e8c4f6 23 #include "BufferedSerial.h"
wardm 12:02d779e8c4f6 24 #include <stdarg.h>
wardm 12:02d779e8c4f6 25
wardm 12:02d779e8c4f6 26 BufferedSerial::BufferedSerial(PinName tx, PinName rx, uint32_t buf_size, uint32_t tx_multiple, const char* name)
wardm 12:02d779e8c4f6 27 : RawSerial(tx, rx) , _rxbuf(buf_size), _txbuf((uint32_t)(tx_multiple*buf_size))
wardm 12:02d779e8c4f6 28 {
wardm 12:02d779e8c4f6 29 RawSerial::attach(this, &BufferedSerial::rxIrq, Serial::RxIrq);
wardm 12:02d779e8c4f6 30 this->_buf_size = buf_size;
wardm 12:02d779e8c4f6 31 this->_tx_multiple = tx_multiple;
wardm 12:02d779e8c4f6 32 return;
wardm 12:02d779e8c4f6 33 }
wardm 12:02d779e8c4f6 34
wardm 12:02d779e8c4f6 35 BufferedSerial::~BufferedSerial(void)
wardm 12:02d779e8c4f6 36 {
wardm 12:02d779e8c4f6 37 RawSerial::attach(NULL, RawSerial::RxIrq);
wardm 12:02d779e8c4f6 38 RawSerial::attach(NULL, RawSerial::TxIrq);
wardm 12:02d779e8c4f6 39
wardm 12:02d779e8c4f6 40 return;
wardm 12:02d779e8c4f6 41 }
wardm 12:02d779e8c4f6 42
wardm 12:02d779e8c4f6 43 int BufferedSerial::readable(void)
wardm 12:02d779e8c4f6 44 {
wardm 12:02d779e8c4f6 45 return _rxbuf.available(); // note: look if things are in the buffer
wardm 12:02d779e8c4f6 46 }
wardm 12:02d779e8c4f6 47
wardm 12:02d779e8c4f6 48 int BufferedSerial::writeable(void)
wardm 12:02d779e8c4f6 49 {
wardm 12:02d779e8c4f6 50 return 1; // buffer allows overwriting by design, always true
wardm 12:02d779e8c4f6 51 }
wardm 12:02d779e8c4f6 52
wardm 12:02d779e8c4f6 53 int BufferedSerial::getc(void)
wardm 12:02d779e8c4f6 54 {
wardm 12:02d779e8c4f6 55 return _rxbuf;
wardm 12:02d779e8c4f6 56 }
wardm 12:02d779e8c4f6 57
wardm 12:02d779e8c4f6 58 int BufferedSerial::putc(int c)
wardm 12:02d779e8c4f6 59 {
wardm 12:02d779e8c4f6 60 _txbuf = (char)c;
wardm 12:02d779e8c4f6 61 BufferedSerial::prime();
wardm 12:02d779e8c4f6 62
wardm 12:02d779e8c4f6 63 return c;
wardm 12:02d779e8c4f6 64 }
wardm 12:02d779e8c4f6 65
wardm 12:02d779e8c4f6 66 int BufferedSerial::puts(const char *s)
wardm 12:02d779e8c4f6 67 {
wardm 12:02d779e8c4f6 68 if (s != NULL) {
wardm 12:02d779e8c4f6 69 const char* ptr = s;
wardm 12:02d779e8c4f6 70
wardm 12:02d779e8c4f6 71 while(*(ptr) != 0) {
wardm 12:02d779e8c4f6 72 _txbuf = *(ptr++);
wardm 12:02d779e8c4f6 73 }
wardm 12:02d779e8c4f6 74 _txbuf = '\n'; // done per puts definition
wardm 12:02d779e8c4f6 75 BufferedSerial::prime();
wardm 12:02d779e8c4f6 76
wardm 12:02d779e8c4f6 77 return (ptr - s) + 1;
wardm 12:02d779e8c4f6 78 }
wardm 12:02d779e8c4f6 79 return 0;
wardm 12:02d779e8c4f6 80 }
wardm 12:02d779e8c4f6 81
wardm 12:02d779e8c4f6 82 int BufferedSerial::printf(const char* format, ...)
wardm 12:02d779e8c4f6 83 {
wardm 12:02d779e8c4f6 84 char buffer[this->_buf_size];
wardm 12:02d779e8c4f6 85 memset(buffer,0,this->_buf_size);
wardm 12:02d779e8c4f6 86 int r = 0;
wardm 12:02d779e8c4f6 87
wardm 12:02d779e8c4f6 88 va_list arg;
wardm 12:02d779e8c4f6 89 va_start(arg, format);
wardm 12:02d779e8c4f6 90 r = vsprintf(buffer, format, arg);
wardm 12:02d779e8c4f6 91 // this may not hit the heap but should alert the user anyways
wardm 12:02d779e8c4f6 92 if(r > this->_buf_size) {
wardm 12:02d779e8c4f6 93 error("%s %d buffer overwrite (max_buf_size: %d exceeded: %d)!\r\n", __FILE__, __LINE__,this->_buf_size,r);
wardm 12:02d779e8c4f6 94 va_end(arg);
wardm 12:02d779e8c4f6 95 return 0;
wardm 12:02d779e8c4f6 96 }
wardm 12:02d779e8c4f6 97 va_end(arg);
wardm 12:02d779e8c4f6 98 r = BufferedSerial::write(buffer, r);
wardm 12:02d779e8c4f6 99
wardm 12:02d779e8c4f6 100 return r;
wardm 12:02d779e8c4f6 101 }
wardm 12:02d779e8c4f6 102
wardm 12:02d779e8c4f6 103 ssize_t BufferedSerial::write(const void *s, size_t length)
wardm 12:02d779e8c4f6 104 {
wardm 12:02d779e8c4f6 105 if (s != NULL && length > 0) {
wardm 12:02d779e8c4f6 106 const char* ptr = (const char*)s;
wardm 12:02d779e8c4f6 107 const char* end = ptr + length;
wardm 12:02d779e8c4f6 108
wardm 12:02d779e8c4f6 109 while (ptr != end) {
wardm 12:02d779e8c4f6 110 _txbuf = *(ptr++);
wardm 12:02d779e8c4f6 111 }
wardm 12:02d779e8c4f6 112 BufferedSerial::prime();
wardm 12:02d779e8c4f6 113
wardm 12:02d779e8c4f6 114 return ptr - (const char*)s;
wardm 12:02d779e8c4f6 115 }
wardm 12:02d779e8c4f6 116 return 0;
wardm 12:02d779e8c4f6 117 }
wardm 12:02d779e8c4f6 118
wardm 12:02d779e8c4f6 119
wardm 12:02d779e8c4f6 120 void BufferedSerial::rxIrq(void)
wardm 12:02d779e8c4f6 121 {
wardm 12:02d779e8c4f6 122 // read from the peripheral and make sure something is available
wardm 12:02d779e8c4f6 123 if(serial_readable(&_serial)) {
wardm 12:02d779e8c4f6 124 _rxbuf = serial_getc(&_serial); // if so load them into a buffer
wardm 12:02d779e8c4f6 125 }
wardm 12:02d779e8c4f6 126
wardm 12:02d779e8c4f6 127 return;
wardm 12:02d779e8c4f6 128 }
wardm 12:02d779e8c4f6 129
wardm 12:02d779e8c4f6 130 void BufferedSerial::txIrq(void)
wardm 12:02d779e8c4f6 131 {
wardm 12:02d779e8c4f6 132 // see if there is room in the hardware fifo and if something is in the software fifo
wardm 12:02d779e8c4f6 133 while(serial_writable(&_serial)) {
wardm 12:02d779e8c4f6 134 if(_txbuf.available()) {
wardm 12:02d779e8c4f6 135 serial_putc(&_serial, (int)_txbuf.get());
wardm 12:02d779e8c4f6 136 } else {
wardm 12:02d779e8c4f6 137 // disable the TX interrupt when there is nothing left to send
wardm 12:02d779e8c4f6 138 RawSerial::attach(NULL, RawSerial::TxIrq);
wardm 12:02d779e8c4f6 139 break;
wardm 12:02d779e8c4f6 140 }
wardm 12:02d779e8c4f6 141 }
wardm 12:02d779e8c4f6 142
wardm 12:02d779e8c4f6 143 return;
wardm 12:02d779e8c4f6 144 }
wardm 12:02d779e8c4f6 145
wardm 12:02d779e8c4f6 146 void BufferedSerial::prime(void)
wardm 12:02d779e8c4f6 147 {
wardm 12:02d779e8c4f6 148 // if already busy then the irq will pick this up
wardm 12:02d779e8c4f6 149 if(serial_writable(&_serial)) {
wardm 12:02d779e8c4f6 150 RawSerial::attach(NULL, RawSerial::TxIrq); // make sure not to cause contention in the irq
wardm 12:02d779e8c4f6 151 BufferedSerial::txIrq(); // only write to hardware in one place
wardm 12:02d779e8c4f6 152 RawSerial::attach(this, &BufferedSerial::txIrq, RawSerial::TxIrq);
wardm 12:02d779e8c4f6 153 }
wardm 12:02d779e8c4f6 154
wardm 12:02d779e8c4f6 155 return;
wardm 12:02d779e8c4f6 156 }
wardm 12:02d779e8c4f6 157
wardm 12:02d779e8c4f6 158