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:
2016-10-04
Revision:
2:7abdaa5a9209
Parent:
1:4403f2ed1c1f
Child:
3:f20e114eb2ee

File content as of revision 2:7abdaa5a9209:


#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
    ADC1->SMPR2 = ADC_SMPR1_SMP18_1 | ADC_SMPR1_SMP18_2; // Set for 144 ADC clock cycles
    
    
    INFO("ADC configuration complete!");
    DBG("ADC Registers:\n\r");
    DBG("The SR Register reads: %d\n\r", ADC1->SR);
    DBG("The CR1 Register reads: %d\n\r", ADC1->CR1);
    DBG("The CR2 Register reads: %d\n\r", ADC1->CR2);
    DBG("The JSQR Register reads: %d\n\r", ADC1->JSQR);
    
    return;
}