Revision 0:1501dea8d383, committed 2015-10-05

Comitter:

schenk

Date:

Mon Oct 05 06:42:59 2015 +0000

Commit message:

window

Changed in this revision

diff -r 000000000000 -r 1501dea8d383 DHT/DHT.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT/DHT.cpp	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,227 @@
+/*
+ *  DHT Library for  Digital-output Humidity and Temperature sensors
+ *
+ *  Works with DHT11, DHT22
+ *             SEN11301P,  Grove - Temperature&Humidity Sensor     (Seeed Studio)
+ *             SEN51035P,  Grove - Temperature&Humidity Sensor Pro (Seeed Studio)
+ *             AM2302   ,  temperature-humidity sensor
+ *             HM2303   ,  Digital-output humidity and temperature sensor
+ *
+ *  Copyright (C) Wim De Roeve
+ *                based on DHT22 sensor library by HO WING KIT
+ *                Arduino DHT11 library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation 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
+ * furished 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 OR 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.
+ */
+
+#include "DHT.h"
+
+#define DHT_DATA_BIT_COUNT 40
+
+DHT::DHT(PinName pin, eType DHTtype)
+{
+    _pin = pin;
+    _DHTtype = DHTtype;
+    _firsttime = true;
+}
+
+DHT::~DHT()
+{
+    
+}
+
+eError DHT::stall(DigitalInOut &io, int const level, int const max_time)
+{
+    int cnt = 0;
+    while (level == io) {
+        if (cnt > max_time) {
+            return ERROR_NO_PATIENCE;
+        }
+        cnt++;
+        wait_us(1);
+    }
+    return ERROR_NONE;
+}
+
+eError DHT::readData()
+{
+    uint8_t i = 0, j = 0, b = 0, data_valid = 0;
+    uint32_t bit_value[DHT_DATA_BIT_COUNT] = {0};
+
+    eError err = ERROR_NONE;
+    time_t currentTime = time(NULL);
+
+    DigitalInOut DHT_io(_pin);
+
+    // IO must be in hi state to start
+    if (ERROR_NONE != stall(DHT_io, 0, 250)) {
+        return BUS_BUSY;
+    }
+
+    // start the transfer
+    DHT_io.output();
+    DHT_io = 0;
+    // only 500uS for DHT22 but 18ms for DHT11
+    (_DHTtype == 11) ? wait_ms(18) : wait(1);
+    DHT_io = 1;
+    wait_us(30);
+    DHT_io.input();
+    // wait till the sensor grabs the bus
+    if (ERROR_NONE != stall(DHT_io, 1, 40)) {
+        return ERROR_NOT_PRESENT;
+    }
+    // sensor should signal low 80us and then hi 80us
+    if (ERROR_NONE != stall(DHT_io, 0, 100)) {
+        return ERROR_SYNC_TIMEOUT;
+    }
+    if (ERROR_NONE != stall(DHT_io, 1, 100)) {
+        return ERROR_NO_PATIENCE;
+    }
+    // capture the data
+    for (i = 0; i < 5; i++) {
+        for (j = 0; j < 8; j++) {
+            if (ERROR_NONE != stall(DHT_io, 0, 75)) {
+                return ERROR_DATA_TIMEOUT;
+            }
+            // logic 0 is 28us max, 1 is 70us
+            wait_us(40);
+            bit_value[i*8+j] = DHT_io;
+            if (ERROR_NONE != stall(DHT_io, 1, 50)) {
+                return ERROR_DATA_TIMEOUT;
+            }
+        }
+    }
+    // store the data
+    for (i = 0; i < 5; i++) {
+        b=0;
+        for (j=0; j<8; j++) {
+            if (bit_value[i*8+j] == 1) {
+                b |= (1 << (7-j));
+            }
+        }
+        DHT_data[i]=b;
+    }
+
+    // uncomment to see the checksum error if it exists
+    //printf(" 0x%02x + 0x%02x + 0x%02x + 0x%02x = 0x%02x \n", DHT_data[0], DHT_data[1], DHT_data[2], DHT_data[3], DHT_data[4]);
+    data_valid = DHT_data[0] + DHT_data[1] + DHT_data[2] + DHT_data[3];
+    if (DHT_data[4] == data_valid) {
+        _lastReadTime = currentTime;
+        _lastTemperature = CalcTemperature();
+        _lastHumidity = CalcHumidity();
+
+    } else {
+        err = ERROR_CHECKSUM;
+    }
+
+    return err;
+
+}
+
+float DHT::CalcTemperature()
+{
+    int v;
+
+    switch (_DHTtype) {
+        case DHT11:
+            v = DHT_data[2];
+            return float(v);
+        case DHT22:
+            v = DHT_data[2] & 0x7F;
+            v *= 256;
+            v += DHT_data[3];
+            v /= 10;
+            if (DHT_data[2] & 0x80)
+                v *= -1;
+            return float(v);
+    }
+    return 0;
+}
+
+float DHT::ReadHumidity()
+{
+    return _lastHumidity;
+}
+
+float DHT::ConvertCelciustoFarenheit(float const celsius)
+{
+    return celsius * 9 / 5 + 32;
+}
+
+float DHT::ConvertCelciustoKelvin(float const celsius)
+{
+    return celsius + 273.15;
+}
+
+// dewPoint function NOAA
+// reference: http://wahiduddin.net/calc/density_algorithms.htm
+float DHT::CalcdewPoint(float const celsius, float const humidity)
+{
+    float A0= 373.15/(273.15 + celsius);
+    float SUM = -7.90298 * (A0-1);
+    SUM += 5.02808 * log10(A0);
+    SUM += -1.3816e-7 * (pow(10, (11.344*(1-1/A0)))-1) ;
+    SUM += 8.1328e-3 * (pow(10,(-3.49149*(A0-1)))-1) ;
+    SUM += log10(1013.246);
+    float VP = pow(10, SUM-3) * humidity;
+    float T = log(VP/0.61078);   // temp var
+    return (241.88 * T) / (17.558-T);
+}
+
+// delta max = 0.6544 wrt dewPoint()
+// 5x faster than dewPoint()
+// reference: http://en.wikipedia.org/wiki/Dew_point
+float DHT::CalcdewPointFast(float const celsius, float const humidity)
+{
+    float a = 17.271;
+    float b = 237.7;
+    float temp = (a * celsius) / (b + celsius) + log(humidity/100);
+    float Td = (b * temp) / (a - temp);
+    return Td;
+}
+
+float DHT::ReadTemperature(eScale Scale)
+{
+    if (Scale == FARENHEIT)
+        return ConvertCelciustoFarenheit(_lastTemperature);
+    else if (Scale == KELVIN)
+        return ConvertCelciustoKelvin(_lastTemperature);
+    else
+        return _lastTemperature;
+}
+
+float DHT::CalcHumidity()
+{
+    int v;
+
+    switch (_DHTtype) {
+        case DHT11:
+            v = DHT_data[0];
+            return float(v);
+        case DHT22:
+            v = DHT_data[0];
+            v *= 256;
+            v += DHT_data[1];
+            v /= 10;
+            return float(v);
+    }
+    return 0;
+}
+
+

diff -r 000000000000 -r 1501dea8d383 DHT/DHT.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT/DHT.h	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,99 @@
+/*
+ *  DHT Library for  Digital-output Humidity and Temperature sensors
+ *
+ *  Works with DHT11, DHT21, DHT22
+ *             SEN11301P,  Grove - Temperature&Humidity Sensor     (Seeed Studio)
+ *             SEN51035P,  Grove - Temperature&Humidity Sensor Pro (Seeed Studio)
+ *             AM2302   ,  temperature-humidity sensor
+ *             RHT01,RHT02, RHT03    ,  Humidity and Temperature Sensor         (Sparkfun)
+ *
+ *  Copyright (C) Wim De Roeve
+ *                based on DHT22 sensor library by HO WING KIT
+ *                Arduino DHT11 library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation 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
+ * furished 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 OR 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.
+ */
+
+#ifndef MBED_DHT_H
+#define MBED_DHT_H
+
+#include "mbed.h"
+
+typedef enum eType eType;
+enum eType {
+    DHT11     = 11,
+    SEN11301P = 11,
+    RHT01     = 11,
+    DHT22     = 22,
+    AM2302    = 22,
+    SEN51035P = 22,
+    RHT02     = 22,
+    RHT03     = 22
+};
+
+typedef enum eError eError;
+enum eError {
+    ERROR_NONE = 0,
+    BUS_BUSY,
+    ERROR_NOT_PRESENT,
+    ERROR_ACK_TOO_LONG,
+    ERROR_SYNC_TIMEOUT,
+    ERROR_DATA_TIMEOUT,
+    ERROR_CHECKSUM,
+    ERROR_NO_PATIENCE
+};
+
+typedef enum eScale eScale;
+enum eScale {
+    CELCIUS = 0,
+    FARENHEIT,
+    KELVIN
+};
+
+
+class DHT
+{
+
+public:
+
+    DHT(PinName pin, eType DHTtype);
+    ~DHT();
+    eError readData(void);
+    float ReadHumidity(void);
+    float ReadTemperature(eScale const Scale);
+    float CalcdewPoint(float const celsius, float const humidity);
+    float CalcdewPointFast(float const celsius, float const humidity);
+
+private:
+    time_t  _lastReadTime;
+    float _lastTemperature;
+    float _lastHumidity;
+    PinName _pin;
+    bool _firsttime;
+    eType _DHTtype;
+    uint8_t DHT_data[5];
+    float CalcTemperature();
+    float CalcHumidity();
+    float ConvertCelciustoFarenheit(float const);
+    float ConvertCelciustoKelvin(float const);
+    eError stall(DigitalInOut &io, int const level, int const max_time);
+
+};
+
+#endif

diff -r 000000000000 -r 1501dea8d383 SDFileSystem.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDFileSystem.lib	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/azsymaivan/code/SDFileSystem/#f242d7bdef28

diff -r 000000000000 -r 1501dea8d383 WIZnetInterface.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WIZnetInterface.lib	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/teams/WIZnet/code/WIZnetInterface/#3b64df29662f

diff -r 000000000000 -r 1501dea8d383 httpServer.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/httpServer.lib	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/users/schenk/code/httpServer/#4c6d58b112d3

diff -r 000000000000 -r 1501dea8d383 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,116 @@
+#include "mbed.h"
+#include "EthernetInterface.h"
+#include "FsHandler.h"
+#include "HTTPServer.h"
+#include "SDFileSystem.h"
+#include "DHT.h"
+
+#ifdef TARGET_WIZWIKI_W7500
+    //Choose one of file system.
+    SDFileSystem local(SD_MOSI, SD_MISO, SD_CLK, SD_SEL, "local");//PB_3, PB_2, PB_1, PB_0
+    //LocalFileSystem local("local");
+#endif
+
+#ifdef TARGET_WIZWIKI_W7500
+    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x00, 0x01, 0x02};
+#endif
+DHT sensor(D4, DHT11);
+DigitalIn Rain(D2);
+EthernetInterface eth;
+HTTPServer  svr;
+char ip_addr[] = "192.168.1.112";
+char subnet_mask[] = "255.255.255.0";
+char gateway_addr[] = "192.168.1.1";
+
+//#define DHCP //If uncomment, W7500 runs DHCP
+int Rain_value=1;
+int mode = 0;
+
+int main()
+{
+    
+    
+    int error = 0;
+    int h = 0, c = 0, Rain_value = 1;
+    HTTPFsRequestHandler::mount("/local/", "/");
+    svr.addHandler<HTTPFsRequestHandler>("/");
+
+#ifdef TARGET_WIZWIKI_W7500
+    
+    #ifdef DHCP
+        eth.init(mac_addr); //Use DHCP
+    #else
+        eth.init(mac_addr, ip_addr, subnet_mask, gateway_addr); //Not Use DHCP
+    #endif
+
+#else
+
+    #ifdef DHCP
+        eth.init(); //Use DHCP
+    #else
+        eth.init(ip_addr, subnet_mask, gateway_addr); //Not Use DHCP
+    #endif
+
+#endif
+
+    printf("Check Ethernet Link\r\n");
+    while(1) //Wait link up
+    {
+        if(eth.link() == true) 
+            break;
+    }
+    printf("Link up\r\n");
+
+    eth.connect();
+    printf("Server IP Address is %s\r\n", eth.getIPAddress());
+
+    if (!svr.start(80, &eth)) {
+
+        //error("Server not starting !");
+        exit(0);
+    }
+
+    while(1) {
+        svr.poll();
+        Rain_value = Rain.read(); // read the rain value
+        wait(0.2);
+        error = sensor.readData();
+        if (0 == error) {
+            c   = sensor.ReadTemperature(CELCIUS);
+            h   = sensor.ReadHumidity();
+            printf("===============Smart window================\n\r");
+            printf("Temperature in Celcius: %d\n",c);
+            printf("Humidity : %d\n", h);
+            printf("Rain value : %d\n", Rain_value);
+            printf("Mode : %d\n", mode);
+            printf("===========================================\n\r");
+            
+        } else {
+            printf("Error: %d\n", error);
+        }
+        
+        
+        //////// open the window
+        if((c>27 || h>50) && (mode == 0&&Rain_value==1)){
+          // ((c>30 or h>50) and closed status)
+            DigitalOut(D9,0);
+            DigitalOut(D8,1);
+            wait(0.87);
+            DigitalOut(D9,0);
+            DigitalOut(D8,0);
+            mode = 1 ; // opened status
+         
+        }
+        /////// close the window
+        else if((c<20 && h<40) || (mode == 1&&Rain_value==0)){ // ((c<20 and h<40) and opened status)
+            DigitalOut(D9,1);
+            DigitalOut(D8,0);
+            wait(0.8);
+            DigitalOut(D9,0);
+            DigitalOut(D8,0);
+            mode = 0; //closed status
+        }
+        
+         wait(1);  
+    }   
+}
\ No newline at end of file

diff -r 000000000000 -r 1501dea8d383 mbed-src.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-src.lib	Mon Oct 05 06:42:59 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-src/#30f9462b5296