Ward Mattar / Mbed 2 deprecated Forumla_Nucleo_Reader

Code for Technion Formula car sensors reader

Dependencies:   mbed Buffer FATFileSystem

Fork of SX1272PingPong by Semtech

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 "NUCLEO F103RB" 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@15:2e0d977dbb31, 2018-05-17 (annotated)

Committer:
wardm
Date:
Thu May 17 20:37:41 2018 +0000
Revision:
15:2e0d977dbb31
V1.0.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wardm 15:2e0d977dbb31 1 /**
wardm 15:2e0d977dbb31 2 * @file BufferedSerial.cpp
wardm 15:2e0d977dbb31 3 * @brief Software Buffer - Extends mbed Serial functionallity adding irq driven TX and RX
wardm 15:2e0d977dbb31 4 * @author sam grove
wardm 15:2e0d977dbb31 5 * @version 1.0
wardm 15:2e0d977dbb31 6 * @see
wardm 15:2e0d977dbb31 7 *
wardm 15:2e0d977dbb31 8 * Copyright (c) 2013
wardm 15:2e0d977dbb31 9 *
wardm 15:2e0d977dbb31 10 * Licensed under the Apache License, Version 2.0 (the "License");
wardm 15:2e0d977dbb31 11 * you may not use this file except in compliance with the License.
wardm 15:2e0d977dbb31 12 * You may obtain a copy of the License at
wardm 15:2e0d977dbb31 13 *
wardm 15:2e0d977dbb31 14 * http://www.apache.org/licenses/LICENSE-2.0
wardm 15:2e0d977dbb31 15 *
wardm 15:2e0d977dbb31 16 * Unless required by applicable law or agreed to in writing, software
wardm 15:2e0d977dbb31 17 * distributed under the License is distributed on an "AS IS" BASIS,
wardm 15:2e0d977dbb31 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
wardm 15:2e0d977dbb31 19 * See the License for the specific language governing permissions and
wardm 15:2e0d977dbb31 20 * limitations under the License.
wardm 15:2e0d977dbb31 21 */
wardm 15:2e0d977dbb31 22
wardm 15:2e0d977dbb31 23 #include "BufferedSerial.h"
wardm 15:2e0d977dbb31 24 #include <stdarg.h>
wardm 15:2e0d977dbb31 25
wardm 15:2e0d977dbb31 26 BufferedSerial::BufferedSerial(PinName tx, PinName rx, uint32_t buf_size, uint32_t tx_multiple, const char* name)
wardm 15:2e0d977dbb31 27 : RawSerial(tx, rx) , _rxbuf(buf_size), _txbuf((uint32_t)(tx_multiple*buf_size))
wardm 15:2e0d977dbb31 28 {
wardm 15:2e0d977dbb31 29 RawSerial::attach(this, &BufferedSerial::rxIrq, Serial::RxIrq);
wardm 15:2e0d977dbb31 30 this->_buf_size = buf_size;
wardm 15:2e0d977dbb31 31 this->_tx_multiple = tx_multiple;
wardm 15:2e0d977dbb31 32 return;
wardm 15:2e0d977dbb31 33 }
wardm 15:2e0d977dbb31 34
wardm 15:2e0d977dbb31 35 BufferedSerial::~BufferedSerial(void)
wardm 15:2e0d977dbb31 36 {
wardm 15:2e0d977dbb31 37 RawSerial::attach(NULL, RawSerial::RxIrq);
wardm 15:2e0d977dbb31 38 RawSerial::attach(NULL, RawSerial::TxIrq);
wardm 15:2e0d977dbb31 39
wardm 15:2e0d977dbb31 40 return;
wardm 15:2e0d977dbb31 41 }
wardm 15:2e0d977dbb31 42
wardm 15:2e0d977dbb31 43 int BufferedSerial::readable(void)
wardm 15:2e0d977dbb31 44 {
wardm 15:2e0d977dbb31 45 return _rxbuf.available(); // note: look if things are in the buffer
wardm 15:2e0d977dbb31 46 }
wardm 15:2e0d977dbb31 47
wardm 15:2e0d977dbb31 48 int BufferedSerial::writeable(void)
wardm 15:2e0d977dbb31 49 {
wardm 15:2e0d977dbb31 50 return 1; // buffer allows overwriting by design, always true
wardm 15:2e0d977dbb31 51 }
wardm 15:2e0d977dbb31 52
wardm 15:2e0d977dbb31 53 int BufferedSerial::getc(void)
wardm 15:2e0d977dbb31 54 {
wardm 15:2e0d977dbb31 55 return _rxbuf;
wardm 15:2e0d977dbb31 56 }
wardm 15:2e0d977dbb31 57
wardm 15:2e0d977dbb31 58 int BufferedSerial::putc(int c)
wardm 15:2e0d977dbb31 59 {
wardm 15:2e0d977dbb31 60 _txbuf = (char)c;
wardm 15:2e0d977dbb31 61 BufferedSerial::prime();
wardm 15:2e0d977dbb31 62
wardm 15:2e0d977dbb31 63 return c;
wardm 15:2e0d977dbb31 64 }
wardm 15:2e0d977dbb31 65
wardm 15:2e0d977dbb31 66 int BufferedSerial::puts(const char *s)
wardm 15:2e0d977dbb31 67 {
wardm 15:2e0d977dbb31 68 if (s != NULL) {
wardm 15:2e0d977dbb31 69 const char* ptr = s;
wardm 15:2e0d977dbb31 70
wardm 15:2e0d977dbb31 71 while(*(ptr) != 0) {
wardm 15:2e0d977dbb31 72 _txbuf = *(ptr++);
wardm 15:2e0d977dbb31 73 }
wardm 15:2e0d977dbb31 74 _txbuf = '\n'; // done per puts definition
wardm 15:2e0d977dbb31 75 BufferedSerial::prime();
wardm 15:2e0d977dbb31 76
wardm 15:2e0d977dbb31 77 return (ptr - s) + 1;
wardm 15:2e0d977dbb31 78 }
wardm 15:2e0d977dbb31 79 return 0;
wardm 15:2e0d977dbb31 80 }
wardm 15:2e0d977dbb31 81
wardm 15:2e0d977dbb31 82 int BufferedSerial::printf(const char* format, ...)
wardm 15:2e0d977dbb31 83 {
wardm 15:2e0d977dbb31 84 char buffer[this->_buf_size];
wardm 15:2e0d977dbb31 85 memset(buffer,0,this->_buf_size);
wardm 15:2e0d977dbb31 86 int r = 0;
wardm 15:2e0d977dbb31 87
wardm 15:2e0d977dbb31 88 va_list arg;
wardm 15:2e0d977dbb31 89 va_start(arg, format);
wardm 15:2e0d977dbb31 90 r = vsprintf(buffer, format, arg);
wardm 15:2e0d977dbb31 91 // this may not hit the heap but should alert the user anyways
wardm 15:2e0d977dbb31 92 if(r > this->_buf_size) {
wardm 15:2e0d977dbb31 93 error("%s %d buffer overwrite (max_buf_size: %d exceeded: %d)!\r\n", __FILE__, __LINE__,this->_buf_size,r);
wardm 15:2e0d977dbb31 94 va_end(arg);
wardm 15:2e0d977dbb31 95 return 0;
wardm 15:2e0d977dbb31 96 }
wardm 15:2e0d977dbb31 97 va_end(arg);
wardm 15:2e0d977dbb31 98 r = BufferedSerial::write(buffer, r);
wardm 15:2e0d977dbb31 99
wardm 15:2e0d977dbb31 100 return r;
wardm 15:2e0d977dbb31 101 }
wardm 15:2e0d977dbb31 102
wardm 15:2e0d977dbb31 103 ssize_t BufferedSerial::write(const void *s, size_t length)
wardm 15:2e0d977dbb31 104 {
wardm 15:2e0d977dbb31 105 if (s != NULL && length > 0) {
wardm 15:2e0d977dbb31 106 const char* ptr = (const char*)s;
wardm 15:2e0d977dbb31 107 const char* end = ptr + length;
wardm 15:2e0d977dbb31 108
wardm 15:2e0d977dbb31 109 while (ptr != end) {
wardm 15:2e0d977dbb31 110 _txbuf = *(ptr++);
wardm 15:2e0d977dbb31 111 }
wardm 15:2e0d977dbb31 112 BufferedSerial::prime();
wardm 15:2e0d977dbb31 113
wardm 15:2e0d977dbb31 114 return ptr - (const char*)s;
wardm 15:2e0d977dbb31 115 }
wardm 15:2e0d977dbb31 116 return 0;
wardm 15:2e0d977dbb31 117 }
wardm 15:2e0d977dbb31 118
wardm 15:2e0d977dbb31 119
wardm 15:2e0d977dbb31 120 void BufferedSerial::rxIrq(void)
wardm 15:2e0d977dbb31 121 {
wardm 15:2e0d977dbb31 122 // read from the peripheral and make sure something is available
wardm 15:2e0d977dbb31 123 if(serial_readable(&_serial)) {
wardm 15:2e0d977dbb31 124 _rxbuf = serial_getc(&_serial); // if so load them into a buffer
wardm 15:2e0d977dbb31 125 }
wardm 15:2e0d977dbb31 126
wardm 15:2e0d977dbb31 127 return;
wardm 15:2e0d977dbb31 128 }
wardm 15:2e0d977dbb31 129
wardm 15:2e0d977dbb31 130 void BufferedSerial::txIrq(void)
wardm 15:2e0d977dbb31 131 {
wardm 15:2e0d977dbb31 132 // see if there is room in the hardware fifo and if something is in the software fifo
wardm 15:2e0d977dbb31 133 while(serial_writable(&_serial)) {
wardm 15:2e0d977dbb31 134 if(_txbuf.available()) {
wardm 15:2e0d977dbb31 135 serial_putc(&_serial, (int)_txbuf.get());
wardm 15:2e0d977dbb31 136 } else {
wardm 15:2e0d977dbb31 137 // disable the TX interrupt when there is nothing left to send
wardm 15:2e0d977dbb31 138 RawSerial::attach(NULL, RawSerial::TxIrq);
wardm 15:2e0d977dbb31 139 break;
wardm 15:2e0d977dbb31 140 }
wardm 15:2e0d977dbb31 141 }
wardm 15:2e0d977dbb31 142
wardm 15:2e0d977dbb31 143 return;
wardm 15:2e0d977dbb31 144 }
wardm 15:2e0d977dbb31 145
wardm 15:2e0d977dbb31 146 void BufferedSerial::prime(void)
wardm 15:2e0d977dbb31 147 {
wardm 15:2e0d977dbb31 148 // if already busy then the irq will pick this up
wardm 15:2e0d977dbb31 149 if(serial_writable(&_serial)) {
wardm 15:2e0d977dbb31 150 RawSerial::attach(NULL, RawSerial::TxIrq); // make sure not to cause contention in the irq
wardm 15:2e0d977dbb31 151 BufferedSerial::txIrq(); // only write to hardware in one place
wardm 15:2e0d977dbb31 152 RawSerial::attach(this, &BufferedSerial::txIrq, RawSerial::TxIrq);
wardm 15:2e0d977dbb31 153 }
wardm 15:2e0d977dbb31 154
wardm 15:2e0d977dbb31 155 return;
wardm 15:2e0d977dbb31 156 }
wardm 15:2e0d977dbb31 157
wardm 15:2e0d977dbb31 158