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

Committer:
defrost
Date:
2016-11-24
Revision:
8:5afd599875e4
Parent:
6:424e225d2a91

File content as of revision 8:5afd599875e4:

/**
* @author Damien Frost
*
* @section LICENSE
*
*   Copyright (c) 2016 Damien Frost
*
*   Permission is hereby granted, free of charge, to any person obtaining a copy
*   of this software and associated documentation files (the "Software"), to deal
*   in the Software without restriction, including without limitation the rights
*   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*   copies of the Software, and to permit persons to whom the Software is
*   furnished to do so, subject to the following conditions:
*
*   The above copyright notice and this permission notice shall be included in
*   all copies or substantial portions of the Software.
*
*   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
*   THE SOFTWARE.
*
* @file "ADC.cpp"
*
* @section DESCRIPTION
*   Configuration of the ADC for the IoT example.
*
*/

#include "ADC.h"
#include "globals.h"
#include "mbed.h"


//#define DEBUG
#define INFOMESSAGES
#define WARNMESSAGES
#define ERRMESSAGES
#define FUNCNAME "ADC"
#include "messages.h"


void ConfigureADC(void){
    
    unsigned int value;
    
    // ensure power is turned on
    // Grabbed from lines 54-57 of analogin_api.c
    // This turns on the clock to Ports A, B, and C
    RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN | RCC_AHB1ENR_GPIOCEN;
    // This turns on the clock to the ADC:
    RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
    
    
    // Turn on the ADC:
    value = ADC_CR2_ADON;
    ADC1->CR2 = value;
    wait_us(100);
    
    // Set the EOC flag at the end of every regular conversion:
    ADC1->CR2 |= ADC_CR2_EOCS;
    
    // Turn on the internal temperature sensor:
    ADC->CCR |= ADC_CCR_TSVREFE;
    
    // Set the first (and only channel) to convert to CH16, the internal temperature sensor:
    ADC1->SQR3 |= ADC_SQR3_SQ1_4;
    
    // Set the sample numbers (making this bigger samples more slowly):
    ADC1->SMPR2 = ADC_SMPR1_SMP16_1 | ADC_SMPR1_SMP16_2; // Set for 144 ADC clock cycles
    
    
    INFO("ADC configuration complete!");
    DBG("ADC Registers:");
    DBG("The SR Register reads: %d", ADC1->SR);
    DBG("The CR1 Register reads: %d", ADC1->CR1);
    DBG("The CR2 Register reads: %d", ADC1->CR2);
    DBG("The JSQR Register reads: %d", ADC1->JSQR);
    
    return;
}