George Djabarov / Mbed OS mbed-os-example-mesh-minimal

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mesh_led_control_example.cpp@52:27692043e962, 2017-09-20 (annotated)

Committer:
mbed_official
Date:
Wed Sep 20 12:17:51 2017 +0100
Revision:
52:27692043e962
Child:
54:34cbb2c2155c
Initial commit.

Commit copied from https://github.com/ARMmbed/mbed-os-example-mesh-minimal

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:27692043e962 1 /*
mbed_official 52:27692043e962 2 * Copyright (c) 2016 ARM Limited. All rights reserved.
mbed_official 52:27692043e962 3 * SPDX-License-Identifier: Apache-2.0
mbed_official 52:27692043e962 4 * Licensed under the Apache License, Version 2.0 (the License); you may
mbed_official 52:27692043e962 5 * not use this file except in compliance with the License.
mbed_official 52:27692043e962 6 * You may obtain a copy of the License at
mbed_official 52:27692043e962 7 *
mbed_official 52:27692043e962 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 52:27692043e962 9 *
mbed_official 52:27692043e962 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 52:27692043e962 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
mbed_official 52:27692043e962 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 52:27692043e962 13 * See the License for the specific language governing permissions and
mbed_official 52:27692043e962 14 * limitations under the License.
mbed_official 52:27692043e962 15 */
mbed_official 52:27692043e962 16 #include "mbed.h"
mbed_official 52:27692043e962 17 #include "nanostack/socket_api.h"
mbed_official 52:27692043e962 18 #include "mesh_led_control_example.h"
mbed_official 52:27692043e962 19 #include "common_functions.h"
mbed_official 52:27692043e962 20 #include "ip6string.h"
mbed_official 52:27692043e962 21 #include "mbed-trace/mbed_trace.h"
mbed_official 52:27692043e962 22
mbed_official 52:27692043e962 23 static void init_socket();
mbed_official 52:27692043e962 24 static void handle_socket();
mbed_official 52:27692043e962 25 static void receive();
mbed_official 52:27692043e962 26 static void my_button_isr();
mbed_official 52:27692043e962 27 static void send_message();
mbed_official 52:27692043e962 28 static void blink();
mbed_official 52:27692043e962 29 static void update_state(uint8_t state);
mbed_official 52:27692043e962 30 static void handle_message(char* msg);
mbed_official 52:27692043e962 31
mbed_official 52:27692043e962 32 // mesh local multicast to all nodes
mbed_official 52:27692043e962 33 #define multicast_addr_str "ff03::1"
mbed_official 52:27692043e962 34 #define TRACE_GROUP "example"
mbed_official 52:27692043e962 35 #define UDP_PORT 1234
mbed_official 52:27692043e962 36 #define MESSAGE_WAIT_TIMEOUT (30.0)
mbed_official 52:27692043e962 37 #define MASTER_GROUP 0
mbed_official 52:27692043e962 38 #define MY_GROUP 1
mbed_official 52:27692043e962 39
mbed_official 52:27692043e962 40 DigitalOut led_1(MBED_CONF_APP_LED, 1);
mbed_official 52:27692043e962 41 InterruptIn my_button(MBED_CONF_APP_BUTTON);
mbed_official 52:27692043e962 42 DigitalOut output(D3, 1);
mbed_official 52:27692043e962 43 Timeout messageTimeout;
mbed_official 52:27692043e962 44
mbed_official 52:27692043e962 45 NetworkInterface * network_if;
mbed_official 52:27692043e962 46 UDPSocket* my_socket;
mbed_official 52:27692043e962 47 // queue for sending messages from button press.
mbed_official 52:27692043e962 48 EventQueue queue;
mbed_official 52:27692043e962 49 // for LED blinking
mbed_official 52:27692043e962 50 Ticker ticker;
mbed_official 52:27692043e962 51
mbed_official 52:27692043e962 52 uint8_t multi_cast_addr[16] = {0};
mbed_official 52:27692043e962 53 uint8_t receive_buffer[20];
mbed_official 52:27692043e962 54 // how many hops the multicast message can go
mbed_official 52:27692043e962 55 static const int16_t multicast_hops = 10;
mbed_official 52:27692043e962 56 bool button_status = 0;
mbed_official 52:27692043e962 57
mbed_official 52:27692043e962 58 void start_mesh_led_control_example(NetworkInterface * interface){
mbed_official 52:27692043e962 59 tr_debug("start_mesh_led_control_example()");
mbed_official 52:27692043e962 60 MBED_ASSERT(MBED_CONF_APP_LED != NC);
mbed_official 52:27692043e962 61 MBED_ASSERT(MBED_CONF_APP_BUTTON != NC);
mbed_official 52:27692043e962 62
mbed_official 52:27692043e962 63 network_if = interface;
mbed_official 52:27692043e962 64 stoip6(multicast_addr_str, strlen(multicast_addr_str), multi_cast_addr);
mbed_official 52:27692043e962 65 init_socket();
mbed_official 52:27692043e962 66 }
mbed_official 52:27692043e962 67
mbed_official 52:27692043e962 68 static void messageTimeoutCallback()
mbed_official 52:27692043e962 69 {
mbed_official 52:27692043e962 70 send_message();
mbed_official 52:27692043e962 71 }
mbed_official 52:27692043e962 72
mbed_official 52:27692043e962 73 static void blink() {
mbed_official 52:27692043e962 74 led_1 = !led_1;
mbed_official 52:27692043e962 75 }
mbed_official 52:27692043e962 76
mbed_official 52:27692043e962 77 void start_blinking() {
mbed_official 52:27692043e962 78 ticker.attach(blink, 1.0);
mbed_official 52:27692043e962 79 }
mbed_official 52:27692043e962 80
mbed_official 52:27692043e962 81 void cancel_blinking() {
mbed_official 52:27692043e962 82 ticker.detach();
mbed_official 52:27692043e962 83 led_1=1;
mbed_official 52:27692043e962 84 }
mbed_official 52:27692043e962 85
mbed_official 52:27692043e962 86 static void send_message() {
mbed_official 52:27692043e962 87 tr_debug("send msg %d", button_status);
mbed_official 52:27692043e962 88
mbed_official 52:27692043e962 89 char buf[20];
mbed_official 52:27692043e962 90 int length;
mbed_official 52:27692043e962 91
mbed_official 52:27692043e962 92 /**
mbed_official 52:27692043e962 93 * Multicast control message is a NUL terminated string of semicolon separated
mbed_official 52:27692043e962 94 * <field identifier>:<value> pairs.
mbed_official 52:27692043e962 95 *
mbed_official 52:27692043e962 96 * Light control message format:
mbed_official 52:27692043e962 97 * t:lights;g:<group_id>;s:<1|0>;\0
mbed_official 52:27692043e962 98 */
mbed_official 52:27692043e962 99 length = snprintf(buf, sizeof(buf), "t:lights;g:%03d;s:%s;", MY_GROUP, (button_status ? "1" : "0")) + 1;
mbed_official 52:27692043e962 100 MBED_ASSERT(length > 0);
mbed_official 52:27692043e962 101 tr_debug("Sending lightcontrol message, %d bytes: %s", length, buf);
mbed_official 52:27692043e962 102 SocketAddress send_sockAddr(multi_cast_addr, NSAPI_IPv6, UDP_PORT);
mbed_official 52:27692043e962 103 my_socket->sendto(send_sockAddr, buf, 20);
mbed_official 52:27692043e962 104 //After message is sent, it is received from the network
mbed_official 52:27692043e962 105 }
mbed_official 52:27692043e962 106
mbed_official 52:27692043e962 107 // As this comes from isr, we cannot use printing or network functions directly from here.
mbed_official 52:27692043e962 108 static void my_button_isr() {
mbed_official 52:27692043e962 109 button_status = !button_status;
mbed_official 52:27692043e962 110 queue.call(send_message);
mbed_official 52:27692043e962 111 }
mbed_official 52:27692043e962 112
mbed_official 52:27692043e962 113 static void update_state(uint8_t state) {
mbed_official 52:27692043e962 114 if (state == 1) {
mbed_official 52:27692043e962 115 tr_debug("Turning led on\n");
mbed_official 52:27692043e962 116 led_1 = 0;
mbed_official 52:27692043e962 117 button_status=1;
mbed_official 52:27692043e962 118 output = 0;
mbed_official 52:27692043e962 119 }
mbed_official 52:27692043e962 120 else {
mbed_official 52:27692043e962 121 tr_debug("Turning led off\n");
mbed_official 52:27692043e962 122 led_1 = 1;
mbed_official 52:27692043e962 123 button_status=0;
mbed_official 52:27692043e962 124 output = 1;
mbed_official 52:27692043e962 125 }
mbed_official 52:27692043e962 126 }
mbed_official 52:27692043e962 127
mbed_official 52:27692043e962 128 static void handle_message(char* msg) {
mbed_official 52:27692043e962 129 // Check if this is lights message
mbed_official 52:27692043e962 130 uint8_t state=button_status;
mbed_official 52:27692043e962 131 uint16_t group=0xffff;
mbed_official 52:27692043e962 132
mbed_official 52:27692043e962 133 if (strstr(msg, "t:lights;") == NULL) {
mbed_official 52:27692043e962 134 return;
mbed_official 52:27692043e962 135 }
mbed_official 52:27692043e962 136
mbed_official 52:27692043e962 137 if (strstr(msg, "s:1;") != NULL) {
mbed_official 52:27692043e962 138 state = 1;
mbed_official 52:27692043e962 139 }
mbed_official 52:27692043e962 140 else if (strstr(msg, "s:0;") != NULL) {
mbed_official 52:27692043e962 141 state = 0;
mbed_official 52:27692043e962 142 }
mbed_official 52:27692043e962 143
mbed_official 52:27692043e962 144 // 0==master, 1==default group
mbed_official 52:27692043e962 145 char *msg_ptr = strstr(msg, "g:");
mbed_official 52:27692043e962 146 if (msg_ptr) {
mbed_official 52:27692043e962 147 char *ptr;
mbed_official 52:27692043e962 148 group = strtol(msg_ptr, &ptr, 10);
mbed_official 52:27692043e962 149 }
mbed_official 52:27692043e962 150
mbed_official 52:27692043e962 151 // in this example we only use one group
mbed_official 52:27692043e962 152 if (group==MASTER_GROUP || group==MY_GROUP) {
mbed_official 52:27692043e962 153 update_state(state);
mbed_official 52:27692043e962 154 }
mbed_official 52:27692043e962 155 }
mbed_official 52:27692043e962 156
mbed_official 52:27692043e962 157 static void receive() {
mbed_official 52:27692043e962 158 // Read data from the socket
mbed_official 52:27692043e962 159 SocketAddress source_addr;
mbed_official 52:27692043e962 160 memset(receive_buffer, 0, sizeof(receive_buffer));
mbed_official 52:27692043e962 161 bool something_in_socket=true;
mbed_official 52:27692043e962 162 // read all messages
mbed_official 52:27692043e962 163 while (something_in_socket) {
mbed_official 52:27692043e962 164 int length = my_socket->recvfrom(&source_addr, receive_buffer, sizeof(receive_buffer) - 1);
mbed_official 52:27692043e962 165 if (length > 0) {
mbed_official 52:27692043e962 166 int timeout_value = MESSAGE_WAIT_TIMEOUT;
mbed_official 52:27692043e962 167 tr_debug("Packet from %s\n", source_addr.get_ip_address());
mbed_official 52:27692043e962 168 timeout_value += rand() % 30;
mbed_official 52:27692043e962 169 tr_debug("Advertisiment after %d seconds", timeout_value);
mbed_official 52:27692043e962 170 messageTimeout.detach();
mbed_official 52:27692043e962 171 messageTimeout.attach(&messageTimeoutCallback, timeout_value);
mbed_official 52:27692043e962 172 // Handle command - "on", "off"
mbed_official 52:27692043e962 173 handle_message((char*)receive_buffer);
mbed_official 52:27692043e962 174 }
mbed_official 52:27692043e962 175 else if (length!=NSAPI_ERROR_WOULD_BLOCK) {
mbed_official 52:27692043e962 176 tr_error("Error happened when receiving %d\n", length);
mbed_official 52:27692043e962 177 something_in_socket=false;
mbed_official 52:27692043e962 178 }
mbed_official 52:27692043e962 179 else {
mbed_official 52:27692043e962 180 // there was nothing to read.
mbed_official 52:27692043e962 181 something_in_socket=false;
mbed_official 52:27692043e962 182 }
mbed_official 52:27692043e962 183 }
mbed_official 52:27692043e962 184 }
mbed_official 52:27692043e962 185
mbed_official 52:27692043e962 186 static void handle_socket() {
mbed_official 52:27692043e962 187 // call-back might come from ISR
mbed_official 52:27692043e962 188 queue.call(receive);
mbed_official 52:27692043e962 189 }
mbed_official 52:27692043e962 190
mbed_official 52:27692043e962 191 static void init_socket()
mbed_official 52:27692043e962 192 {
mbed_official 52:27692043e962 193 my_socket = new UDPSocket(network_if);
mbed_official 52:27692043e962 194 my_socket->set_blocking(false);
mbed_official 52:27692043e962 195 my_socket->bind(UDP_PORT);
mbed_official 52:27692043e962 196 my_socket->setsockopt(SOCKET_IPPROTO_IPV6, SOCKET_IPV6_MULTICAST_HOPS, &multicast_hops, sizeof(multicast_hops));
mbed_official 52:27692043e962 197 if (MBED_CONF_APP_BUTTON != NC) {
mbed_official 52:27692043e962 198 my_button.fall(&my_button_isr);
mbed_official 52:27692043e962 199 my_button.mode(PullUp);
mbed_official 52:27692043e962 200 }
mbed_official 52:27692043e962 201 //let's register the call-back function.
mbed_official 52:27692043e962 202 //If something happens in socket (packets in or out), the call-back is called.
mbed_official 52:27692043e962 203 my_socket->sigio(callback(handle_socket));
mbed_official 52:27692043e962 204 // dispatch forever
mbed_official 52:27692043e962 205 queue.dispatch();
mbed_official 52:27692043e962 206 }