Damien Frost / Mbed 2 deprecated IoT_Ex

Example program to create IoT devices for a local network, which connect to a local server.

Dependencies:   WebSocketClient WiflyInterface mbed messages

This code is used in the second part of my Internet of Things (IoT) blog post available here. The code is fairly simple, but its real value is in its reliability. I have worked hard to try to make the wireless connection as reliable, and as fast, as possible. There are a few lines of code that must be modified before it will work correctly, and those are described in the following Wiki pages.

It is designed to work with a Python WebSocket Server running on a PC, the source code of which is available here.

Once operating with the server, each microcontroller, or IoT device, will broadcast a counter and its internal temperature to your WebSocket Server.

source/ADC.cpp@8:5afd599875e4, 2016-11-24 (annotated)

Committer:
defrost
Date:
Thu Nov 24 16:54:56 2016 +0000
Revision:
8:5afd599875e4
Parent:
6:424e225d2a91 
- Updated messages.h to its own library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
defrost 6:424e225d2a91 1 /**
defrost 6:424e225d2a91 2 * @author Damien Frost
defrost 6:424e225d2a91 3 *
defrost 6:424e225d2a91 4 * @section LICENSE
defrost 6:424e225d2a91 5 *
defrost 6:424e225d2a91 6 * Copyright (c) 2016 Damien Frost
defrost 6:424e225d2a91 7 *
defrost 6:424e225d2a91 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
defrost 6:424e225d2a91 9 * of this software and associated documentation files (the "Software"), to deal
defrost 6:424e225d2a91 10 * in the Software without restriction, including without limitation the rights
defrost 6:424e225d2a91 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
defrost 6:424e225d2a91 12 * copies of the Software, and to permit persons to whom the Software is
defrost 6:424e225d2a91 13 * furnished to do so, subject to the following conditions:
defrost 6:424e225d2a91 14 *
defrost 6:424e225d2a91 15 * The above copyright notice and this permission notice shall be included in
defrost 6:424e225d2a91 16 * all copies or substantial portions of the Software.
defrost 6:424e225d2a91 17 *
defrost 6:424e225d2a91 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
defrost 6:424e225d2a91 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
defrost 6:424e225d2a91 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
defrost 6:424e225d2a91 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
defrost 6:424e225d2a91 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
defrost 6:424e225d2a91 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
defrost 6:424e225d2a91 24 * THE SOFTWARE.
defrost 6:424e225d2a91 25 *
defrost 6:424e225d2a91 26 * @file "ADC.cpp"
defrost 6:424e225d2a91 27 *
defrost 6:424e225d2a91 28 * @section DESCRIPTION
defrost 6:424e225d2a91 29 * Configuration of the ADC for the IoT example.
defrost 6:424e225d2a91 30 *
defrost 6:424e225d2a91 31 */
defrost 1:4403f2ed1c1f 32
defrost 1:4403f2ed1c1f 33 #include "ADC.h"
defrost 1:4403f2ed1c1f 34 #include "globals.h"
defrost 1:4403f2ed1c1f 35 #include "mbed.h"
defrost 1:4403f2ed1c1f 36
defrost 1:4403f2ed1c1f 37
defrost 1:4403f2ed1c1f 38 //#define DEBUG
defrost 1:4403f2ed1c1f 39 #define INFOMESSAGES
defrost 1:4403f2ed1c1f 40 #define WARNMESSAGES
defrost 1:4403f2ed1c1f 41 #define ERRMESSAGES
defrost 1:4403f2ed1c1f 42 #define FUNCNAME "ADC"
defrost 1:4403f2ed1c1f 43 #include "messages.h"
defrost 1:4403f2ed1c1f 44
defrost 1:4403f2ed1c1f 45
defrost 1:4403f2ed1c1f 46 void ConfigureADC(void){
defrost 1:4403f2ed1c1f 47
defrost 1:4403f2ed1c1f 48 unsigned int value;
defrost 1:4403f2ed1c1f 49
defrost 1:4403f2ed1c1f 50 // ensure power is turned on
defrost 1:4403f2ed1c1f 51 // Grabbed from lines 54-57 of analogin_api.c
defrost 1:4403f2ed1c1f 52 // This turns on the clock to Ports A, B, and C
defrost 1:4403f2ed1c1f 53 RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN | RCC_AHB1ENR_GPIOCEN;
defrost 1:4403f2ed1c1f 54 // This turns on the clock to the ADC:
defrost 1:4403f2ed1c1f 55 RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
defrost 1:4403f2ed1c1f 56
defrost 1:4403f2ed1c1f 57
defrost 1:4403f2ed1c1f 58 // Turn on the ADC:
defrost 1:4403f2ed1c1f 59 value = ADC_CR2_ADON;
defrost 1:4403f2ed1c1f 60 ADC1->CR2 = value;
defrost 1:4403f2ed1c1f 61 wait_us(100);
defrost 1:4403f2ed1c1f 62
defrost 2:7abdaa5a9209 63 // Set the EOC flag at the end of every regular conversion:
defrost 2:7abdaa5a9209 64 ADC1->CR2 |= ADC_CR2_EOCS;
defrost 2:7abdaa5a9209 65
defrost 1:4403f2ed1c1f 66 // Turn on the internal temperature sensor:
defrost 1:4403f2ed1c1f 67 ADC->CCR |= ADC_CCR_TSVREFE;
defrost 1:4403f2ed1c1f 68
defrost 2:7abdaa5a9209 69 // Set the first (and only channel) to convert to CH16, the internal temperature sensor:
defrost 2:7abdaa5a9209 70 ADC1->SQR3 |= ADC_SQR3_SQ1_4;
defrost 1:4403f2ed1c1f 71
defrost 1:4403f2ed1c1f 72 // Set the sample numbers (making this bigger samples more slowly):
defrost 2:7abdaa5a9209 73 ADC1->SMPR2 = ADC_SMPR1_SMP16_1 | ADC_SMPR1_SMP16_2; // Set for 144 ADC clock cycles
defrost 1:4403f2ed1c1f 74
defrost 1:4403f2ed1c1f 75
defrost 1:4403f2ed1c1f 76 INFO("ADC configuration complete!");
defrost 5:0c7d131e6089 77 DBG("ADC Registers:");
defrost 5:0c7d131e6089 78 DBG("The SR Register reads: %d", ADC1->SR);
defrost 5:0c7d131e6089 79 DBG("The CR1 Register reads: %d", ADC1->CR1);
defrost 5:0c7d131e6089 80 DBG("The CR2 Register reads: %d", ADC1->CR2);
defrost 5:0c7d131e6089 81 DBG("The JSQR Register reads: %d", ADC1->JSQR);
defrost 1:4403f2ed1c1f 82
defrost 1:4403f2ed1c1f 83 return;
defrost 1:4403f2ed1c1f 84 }