sandbox / Mbed OS simple-mbed-client-example

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Dependencies:   simple-mbed-client

Fork of simple-mbed-client-example by Jan Jongboom

main.cpp@14:ddc258abaaac, 2016-05-17 (annotated)

Committer:
janjongboom
Date:
Tue May 17 00:15:40 2016 +0000
Revision:
14:ddc258abaaac
Parent:
13:d4da5e6aa952
Child:
16:71ec73ea9b6d
Use semaphore in interrupt context, and up value in main thread.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
geky 4:dcd0494556be 1 /*
geky 4:dcd0494556be 2 * Copyright (c) 2015 ARM Limited. All rights reserved.
geky 4:dcd0494556be 3 * SPDX-License-Identifier: Apache-2.0
geky 4:dcd0494556be 4 * Licensed under the Apache License, Version 2.0 (the License); you may
geky 4:dcd0494556be 5 * not use this file except in compliance with the License.
geky 4:dcd0494556be 6 * You may obtain a copy of the License at
geky 4:dcd0494556be 7 *
geky 4:dcd0494556be 8 * http://www.apache.org/licenses/LICENSE-2.0
geky 4:dcd0494556be 9 *
geky 4:dcd0494556be 10 * Unless required by applicable law or agreed to in writing, software
geky 4:dcd0494556be 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
geky 4:dcd0494556be 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
geky 4:dcd0494556be 13 * See the License for the specific language governing permissions and
geky 4:dcd0494556be 14 * limitations under the License.
geky 4:dcd0494556be 15 */
geky 4:dcd0494556be 16 #include "mbed.h"
janjongboom 13:d4da5e6aa952 17 #include "security.h" // security file from connector.mbed.com
janjongboom 13:d4da5e6aa952 18 #include "LWIPInterface.h" // using Ethernet for connectivity
janjongboom 13:d4da5e6aa952 19 #include "simple-mbed-client.h" // simple-mbed-client
geky 4:dcd0494556be 20
janjongboom 13:d4da5e6aa952 21 // So these lines are unique to connecting etc... but then it's just a normal program
geky 4:dcd0494556be 22
janjongboom 13:d4da5e6aa952 23 Serial pc(USBTX, USBRX); // talk back to the computer
janjongboom 13:d4da5e6aa952 24 LWIPInterface lwip; // define the Ethernet interface
janjongboom 13:d4da5e6aa952 25 SimpleMbedClient client;
geky 4:dcd0494556be 26
janjongboom 13:d4da5e6aa952 27 // Declare some peripherals here
janjongboom 13:d4da5e6aa952 28 DigitalOut led(LED_RED);
janjongboom 13:d4da5e6aa952 29 DigitalOut registeredLed(LED_BLUE, 1);
janjongboom 13:d4da5e6aa952 30 InterruptIn btn(SW3);
geky 4:dcd0494556be 31
janjongboom 14:ddc258abaaac 32 // We need a semaphore because we cannot update value in interrupt context
janjongboom 14:ddc258abaaac 33 Semaphore updates(0);
janjongboom 14:ddc258abaaac 34
janjongboom 13:d4da5e6aa952 35 // play function, invoked thru mbed Client
janjongboom 13:d4da5e6aa952 36 void play(void* args) {
janjongboom 14:ddc258abaaac 37 printf("I'm gonna play a song!\n");
janjongboom 13:d4da5e6aa952 38 }
geky 0:9ad9d701b1c3 39
janjongboom 13:d4da5e6aa952 40 // patternUpdated is called when the value of led/0/pattern changes
janjongboom 13:d4da5e6aa952 41 void patternUpdated(string newPattern) {
janjongboom 14:ddc258abaaac 42 printf("Got a new pattern... %s\n", newPattern.c_str());
janjongboom 13:d4da5e6aa952 43 }
geky 4:dcd0494556be 44
janjongboom 13:d4da5e6aa952 45 // Here we define some mbed Client resources
janjongboom 13:d4da5e6aa952 46 SimpleResourceInt btn_count = client.define_resource("button/0/clicks", 0, M2MBase::GET_ALLOWED, true);
janjongboom 13:d4da5e6aa952 47 // need a callback when a PUT request comes in? Just pass in a callback
janjongboom 13:d4da5e6aa952 48 SimpleResourceString pattern = client.define_resource("led/0/pattern", "500:500:500", &patternUpdated);
geky 4:dcd0494556be 49
janjongboom 13:d4da5e6aa952 50 // Status callbacks if you're interested in that
janjongboom 13:d4da5e6aa952 51 void registered() {
janjongboom 14:ddc258abaaac 52 printf("registered\n");
janjongboom 13:d4da5e6aa952 53 registeredLed = 0;
janjongboom 13:d4da5e6aa952 54 }
janjongboom 13:d4da5e6aa952 55 void unregistered() {
janjongboom 14:ddc258abaaac 56 printf("unregistered\n");
janjongboom 13:d4da5e6aa952 57 registeredLed = 1;
geky 4:dcd0494556be 58 }
geky 4:dcd0494556be 59
janjongboom 14:ddc258abaaac 60 // we cannot do blocking stuff here, or device will crash
janjongboom 14:ddc258abaaac 61 // release semaphore and update btn_count in the while() loop...
janjongboom 13:d4da5e6aa952 62 void fall() {
janjongboom 14:ddc258abaaac 63 updates.release();
janjongboom 13:d4da5e6aa952 64 }
janjongboom 13:d4da5e6aa952 65
janjongboom 13:d4da5e6aa952 66 // normal function
janjongboom 13:d4da5e6aa952 67 void toggleLed() {
janjongboom 13:d4da5e6aa952 68 led = !led;
geky 4:dcd0494556be 69 }
geky 4:dcd0494556be 70
geky 4:dcd0494556be 71 int main() {
janjongboom 13:d4da5e6aa952 72 pc.baud(115200);
janjongboom 13:d4da5e6aa952 73
janjongboom 14:ddc258abaaac 74 printf("Hello world\n");
janjongboom 14:ddc258abaaac 75
janjongboom 13:d4da5e6aa952 76 Ticker t;
janjongboom 13:d4da5e6aa952 77 t.attach(&toggleLed, 1.0f);
geky 4:dcd0494556be 78
janjongboom 13:d4da5e6aa952 79 btn.fall(&fall);
janjongboom 13:d4da5e6aa952 80
janjongboom 13:d4da5e6aa952 81 // I want C++11 lambdas!
janjongboom 13:d4da5e6aa952 82 // here we define functions that should live in the cloud
janjongboom 13:d4da5e6aa952 83 client.define_function("music/0/play", &play);
geky 4:dcd0494556be 84
janjongboom 13:d4da5e6aa952 85 if (lwip.connect() != 0) { // connect to the internet
janjongboom 14:ddc258abaaac 86 printf("Connect to eth failed...\n");
janjongboom 13:d4da5e6aa952 87 return 1;
janjongboom 13:d4da5e6aa952 88 }
geky 4:dcd0494556be 89
janjongboom 14:ddc258abaaac 90 printf("IP address %s\r\n", lwip.getIPAddress());
janjongboom 13:d4da5e6aa952 91
janjongboom 13:d4da5e6aa952 92 bool setup = client.setup(&lwip); // start mbed client!
janjongboom 13:d4da5e6aa952 93 if (!setup) {
janjongboom 13:d4da5e6aa952 94 printf("Setting up mbed_client failed...\n");
janjongboom 13:d4da5e6aa952 95 return 1;
geky 4:dcd0494556be 96 }
janjongboom 14:ddc258abaaac 97
janjongboom 13:d4da5e6aa952 98 client.on_registered(&registered);
janjongboom 13:d4da5e6aa952 99 client.on_unregistered(&unregistered);
janjongboom 13:d4da5e6aa952 100
janjongboom 14:ddc258abaaac 101 while (1) {
janjongboom 14:ddc258abaaac 102 int v = updates.wait(25000);
janjongboom 14:ddc258abaaac 103
janjongboom 14:ddc258abaaac 104 if (v == 1) {
janjongboom 14:ddc258abaaac 105 btn_count = btn_count + 1;
janjongboom 14:ddc258abaaac 106 // printf is a bit inflexible, static_cast to get the right value
janjongboom 14:ddc258abaaac 107 printf("btn_count is now %d\n", static_cast<int>(btn_count));
janjongboom 14:ddc258abaaac 108 }
janjongboom 14:ddc258abaaac 109
janjongboom 14:ddc258abaaac 110 // call keep_alive every now and then
janjongboom 14:ddc258abaaac 111 client.keep_alive();
janjongboom 14:ddc258abaaac 112 }
geky 4:dcd0494556be 113 }