ittraining_project_2016 / ESP8266Interface

for testing wifi

Dependents:   ESP8266_Test_WIFI

Fork of ESP8266Interface by Steve Kim

Socket/UDPSocket.cpp@44:3a7b6083210b, 2015-06-03 (annotated)

Committer:
sarahmarshy
Date:
Wed Jun 03 18:21:19 2015 +0000
Revision:
44:3a7b6083210b
Parent:
35:22d30e936e4c
Child:
45:c180905b5b79
-UDP Client working ; -Interfaces with WebSocketClient; -General improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:fb4494783863 1 /* Copyright (C) 2012 mbed.org, MIT License
samux 1:fb4494783863 2 *
samux 1:fb4494783863 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:fb4494783863 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
samux 1:fb4494783863 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
samux 1:fb4494783863 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
samux 1:fb4494783863 7 * furnished to do so, subject to the following conditions:
samux 1:fb4494783863 8 *
samux 1:fb4494783863 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:fb4494783863 10 * substantial portions of the Software.
samux 1:fb4494783863 11 *
samux 1:fb4494783863 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:fb4494783863 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:fb4494783863 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:fb4494783863 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:fb4494783863 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:fb4494783863 17 */
samux 1:fb4494783863 18
samux 1:fb4494783863 19 #include "UDPSocket.h"
samux 1:fb4494783863 20
samux 1:fb4494783863 21 #include <string>
samux 1:fb4494783863 22 #include <algorithm>
samux 1:fb4494783863 23
michaeljkoster 12:c5f0eac67a8a 24 extern Serial pc;
michaeljkoster 12:c5f0eac67a8a 25
samux 1:fb4494783863 26 UDPSocket::UDPSocket()
samux 1:fb4494783863 27 {
samux 1:fb4494783863 28 endpoint_configured = false;
samux 1:fb4494783863 29 endpoint_read = false;
michaeljkoster 19:fb8d5bff2076 30 Endpoint currentEndpoint;
samux 1:fb4494783863 31 }
samux 1:fb4494783863 32
samux 1:fb4494783863 33 int UDPSocket::init(void)
samux 1:fb4494783863 34 {
samux 1:fb4494783863 35 return 0;
samux 1:fb4494783863 36 }
samux 1:fb4494783863 37
samux 1:fb4494783863 38 // Server initialization
samux 1:fb4494783863 39 int UDPSocket::bind(int port)
samux 1:fb4494783863 40 {
samux 1:fb4494783863 41 return 0;
samux 1:fb4494783863 42 }
samux 1:fb4494783863 43
samux 1:fb4494783863 44 // -1 if unsuccessful, else number of bytes written
samux 1:fb4494783863 45 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
samux 1:fb4494783863 46 {
samux 1:fb4494783863 47 Timer tmr;
samux 1:fb4494783863 48 int idx = 0;
samux 1:fb4494783863 49
mbedAustin 35:22d30e936e4c 50
samux 1:fb4494783863 51 confEndpoint(remote);
samux 1:fb4494783863 52
mbedAustin 35:22d30e936e4c 53 // initialize transparent mode if not already done
mbedAustin 35:22d30e936e4c 54 if(!endpoint_configured) {
mbedAustin 35:22d30e936e4c 55 // initialize UDP (default id of -1 means transparent mode)
sarahmarshy 44:3a7b6083210b 56 //!wifi->start(ESP_UDP_TYPE, remote._ipAddress, remote._port, remote._id
sarahmarshy 44:3a7b6083210b 57 if(!wifi->startUDP(remote._ipAddress, remote._port, 0,length)) {
mbedAustin 35:22d30e936e4c 58 return(-1);
mbedAustin 35:22d30e936e4c 59 }
mbedAustin 35:22d30e936e4c 60 endpoint_configured = true;
mbedAustin 35:22d30e936e4c 61 }
mbedAustin 35:22d30e936e4c 62
samux 1:fb4494783863 63 tmr.start();
samux 1:fb4494783863 64
samux 1:fb4494783863 65 while ((tmr.read_ms() < _timeout) || _blocking) {
samux 1:fb4494783863 66
mbedAustin 31:fd0eaf273b11 67 idx += wifi->send(packet, length);
samux 1:fb4494783863 68
samux 1:fb4494783863 69 if (idx == length)
samux 1:fb4494783863 70 return idx;
samux 1:fb4494783863 71 }
samux 1:fb4494783863 72 return (idx == 0) ? -1 : idx;
samux 1:fb4494783863 73 }
samux 1:fb4494783863 74
samux 1:fb4494783863 75 // -1 if unsuccessful, else number of bytes received
samux 1:fb4494783863 76 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
samux 1:fb4494783863 77 {
samux 1:fb4494783863 78 Timer tmr;
samux 1:fb4494783863 79 int idx = 0;
samux 1:fb4494783863 80 int nb_available = 0;
samux 1:fb4494783863 81 int time = -1;
mbedAustin 35:22d30e936e4c 82
michaeljkoster 27:9c6cefc12f0c 83 //make this the non-blocking case and return if <= 0
michaeljkoster 27:9c6cefc12f0c 84 // remember to change the config to blocking
michaeljkoster 27:9c6cefc12f0c 85 // if ( ! _blocking) {
mbedAustin 35:22d30e936e4c 86 // if ( wifi.readable <= 0 ) {
mbedAustin 35:22d30e936e4c 87 // return (wifi.readable);
mbedAustin 35:22d30e936e4c 88 // }
michaeljkoster 27:9c6cefc12f0c 89 // }
michaeljkoster 27:9c6cefc12f0c 90 //---
michaeljkoster 22:c4360e61486a 91 tmr.start();
samux 1:fb4494783863 92 if (_blocking) {
samux 1:fb4494783863 93 while (1) {
samux 1:fb4494783863 94 nb_available = wifi->readable();
samux 1:fb4494783863 95 if (nb_available != 0) {
samux 1:fb4494783863 96 break;
samux 1:fb4494783863 97 }
samux 1:fb4494783863 98 }
michaeljkoster 21:690526f05fe6 99 }
michaeljkoster 27:9c6cefc12f0c 100 //---
michaeljkoster 27:9c6cefc12f0c 101 // blocking case
michaeljkoster 21:690526f05fe6 102 else {
michaeljkoster 22:c4360e61486a 103 tmr.reset();
mbedAustin 35:22d30e936e4c 104
mbedAustin 35:22d30e936e4c 105 while (time < _timeout) {
michaeljkoster 21:690526f05fe6 106 nb_available = wifi->readable();
michaeljkoster 21:690526f05fe6 107 if (nb_available < 0) return nb_available;
michaeljkoster 21:690526f05fe6 108 if (nb_available > 0) break ;
michaeljkoster 21:690526f05fe6 109 time = tmr.read_ms();
michaeljkoster 21:690526f05fe6 110 }
mbedAustin 35:22d30e936e4c 111
mbedAustin 35:22d30e936e4c 112 if (nb_available == 0) return nb_available;
mbedAustin 35:22d30e936e4c 113 }
mbedAustin 35:22d30e936e4c 114
michaeljkoster 27:9c6cefc12f0c 115 // change this to < 20 mS timeout per byte to detect end of packet gap
michaeljkoster 27:9c6cefc12f0c 116 // this may not work due to buffering at the UART interface
michaeljkoster 22:c4360e61486a 117 tmr.reset();
michaeljkoster 27:9c6cefc12f0c 118 // while ( tmr.read_ms() < 20 ) {
mbedAustin 35:22d30e936e4c 119 // if ( wifi.readable() && (idx < length) ) {
mbedAustin 35:22d30e936e4c 120 // buffer[idx++] = wifi->getc();
mbedAustin 35:22d30e936e4c 121 // tmr.reset();
mbedAustin 35:22d30e936e4c 122 // }
mbedAustin 35:22d30e936e4c 123 // if ( idx == length ) {
mbedAustin 35:22d30e936e4c 124 // break;
mbedAustin 35:22d30e936e4c 125 // }
michaeljkoster 27:9c6cefc12f0c 126 // }
michaeljkoster 27:9c6cefc12f0c 127 //---
samux 1:fb4494783863 128 while (time < _timeout) {
samux 1:fb4494783863 129
samux 1:fb4494783863 130 nb_available = wifi->readable();
michaeljkoster 23:de9221771e96 131 //for (int i = 0; i < min(nb_available, length); i++) {
michaeljkoster 23:de9221771e96 132 for (int i = 0; i < min(nb_available, (length-idx)); i++) {
samux 1:fb4494783863 133 buffer[idx] = wifi->getc();
samux 1:fb4494783863 134 idx++;
samux 1:fb4494783863 135 }
samux 1:fb4494783863 136 if (idx == length) {
samux 1:fb4494783863 137 break;
samux 1:fb4494783863 138 }
samux 1:fb4494783863 139 time = tmr.read_ms();
samux 1:fb4494783863 140 }
michaeljkoster 27:9c6cefc12f0c 141 //---
samux 1:fb4494783863 142 readEndpoint(remote);
samux 1:fb4494783863 143 return (idx == 0) ? -1 : idx;
samux 1:fb4494783863 144 }
samux 1:fb4494783863 145
samux 1:fb4494783863 146 bool UDPSocket::confEndpoint(Endpoint & ep)
samux 1:fb4494783863 147 {
michaeljkoster 19:fb8d5bff2076 148 currentEndpoint = ep;
samux 1:fb4494783863 149 return true;
samux 1:fb4494783863 150 }
samux 1:fb4494783863 151
samux 1:fb4494783863 152 bool UDPSocket::readEndpoint(Endpoint & ep)
samux 1:fb4494783863 153 {
michaeljkoster 19:fb8d5bff2076 154 ep = currentEndpoint;
michaeljkoster 16:3f0efaa57a12 155 return true;
samux 1:fb4494783863 156 }