Revision 0:2d8f1aed9d70, committed 2020-07-06

Comitter:

bernard_arnault

Date:

Mon Jul 06 13:59:08 2020 +0000

Commit message:

First draft NUCELO-LK32KC and DHT11

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT.cpp	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,231 @@
+/*
+ *  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 41
+
+DHT::DHT(PinName pin,int DHTtype) {
+    _pin = pin;
+    _DHTtype = DHTtype;
+    _firsttime=true;
+}
+
+DHT::~DHT() {
+}
+
+int DHT::readData() {
+    int i, j, retryCount,b;
+    unsigned int bitTimes[DHT_DATA_BIT_COUNT];
+
+    eError err = ERROR_NONE;
+    time_t currentTime = time(NULL);
+
+    DigitalInOut DHT_io(_pin);
+
+    for (i = 0; i < DHT_DATA_BIT_COUNT; i++) {
+        bitTimes[i] = 0;
+    }
+
+    if (!_firsttime) {
+        if (int(currentTime - _lastReadTime) < 2) {
+            err = ERROR_NO_PATIENCE;
+            return err;
+        }
+    } else {
+        _firsttime=false;
+        _lastReadTime=currentTime;
+    }
+    retryCount = 0;
+
+    do {
+        if (retryCount > 125) {
+            err = BUS_BUSY;
+            return err;
+        }
+        retryCount ++;
+        wait_us(2);
+    } while ((DHT_io==0));
+
+
+    DHT_io.output();
+    DHT_io = 0;
+    wait_ms(18);
+    DHT_io = 1;
+    wait_us(40);
+    DHT_io.input();
+
+    retryCount = 0;
+    do {
+        if (retryCount > 40)  {
+            err = ERROR_NOT_PRESENT;
+            return err;
+        }
+        retryCount++;
+        wait_us(1);
+    } while ((DHT_io==1));
+
+    if (err != ERROR_NONE) {
+        return err;
+    }
+
+    wait_us(80);
+
+    for (i = 0; i < 5; i++) {
+        for (j = 0; j < 8; j++) {
+
+            retryCount = 0;
+            do {
+                if (retryCount > 75)  {
+                    err = ERROR_DATA_TIMEOUT;
+                    return err;
+                }
+                retryCount++;
+                wait_us(1);
+            } while (DHT_io == 0);
+            wait_us(40);
+            bitTimes[i*8+j]=DHT_io;
+
+            int count = 0;
+            while (DHT_io == 1 && count < 100) {
+                wait_us(1);
+                count++;
+            }
+        }
+    }
+    DHT_io.output();
+    DHT_io = 1;
+    for (i = 0; i < 5; i++) {
+        b=0;
+        for (j=0; j<8; j++) {
+            if (bitTimes[i*8+j+1] > 0) {
+                b |= ( 1 << (7-j));
+            }
+        }
+        DHT_data[i]=b;
+    }
+
+    if (DHT_data[4] == ((DHT_data[0] + DHT_data[1] + DHT_data[2] + DHT_data[3]) & 0xFF)) {
+        _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 celsius) {
+    return celsius * 9 / 5 + 32;
+}
+
+float DHT::ConvertCelciustoKelvin(float celsius) {
+    return celsius + 273.15;
+}
+
+// dewPoint function NOAA
+// reference: http://wahiduddin.net/calc/density_algorithms.htm
+float DHT::CalcdewPoint(float celsius, float 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 celsius, float 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;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT.h	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,89 @@
+/* 
+ *  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"
+
+enum eType{
+        DHT11     = 11,
+        SEN11301P = 11,
+        RHT01     = 11,
+        DHT22     = 22,
+        AM2302    = 22,
+        SEN51035P = 22,
+        RHT02     = 22,
+        RHT03     = 22
+    } ;
+
+enum eError {
+    ERROR_NONE = 0,
+    BUS_BUSY =1,
+    ERROR_NOT_PRESENT =2 ,
+    ERROR_ACK_TOO_LONG =3 ,
+    ERROR_SYNC_TIMEOUT = 4,
+    ERROR_DATA_TIMEOUT =5 ,
+    ERROR_CHECKSUM = 6,
+    ERROR_NO_PATIENCE =7
+} ;
+
+typedef enum {
+    CELCIUS =0 ,
+    FARENHEIT =1,
+    KELVIN=2
+} eScale;
+
+class DHT {
+public:
+    DHT(PinName pin,int DHTtype);
+    ~DHT();
+    int readData(void);
+    float ReadHumidity(void);
+    float ReadTemperature(eScale Scale);
+    float CalcdewPoint(float celsius, float humidity);
+    float CalcdewPointFast(float celsius, float humidity);
+
+private:
+    time_t  _lastReadTime;
+    float _lastTemperature;
+    float _lastHumidity;
+    PinName _pin;
+    bool _firsttime;
+    int _DHTtype;
+    int DHT_data[6];
+    float CalcTemperature();
+    float CalcHumidity();
+    float ConvertCelciustoFarenheit(float);
+    float ConvertCelciustoKelvin(float);
+};
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PinNames.h	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,170 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2018, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+
+#ifndef MBED_PINNAMES_H
+#define MBED_PINNAMES_H
+
+#include "cmsis.h"
+#include "PinNamesTypes.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    ALT0  = 0x100,
+    ALT1  = 0x200,
+    ALT2  = 0x300,
+    ALT3  = 0x400
+} ALTx;
+
+typedef enum {
+    PA_0  = 0x00,
+    PA_1  = 0x01,
+    PA_2  = 0x02,
+    PA_2_ALT0 = PA_2 | ALT0,
+    PA_3  = 0x03,
+    PA_3_ALT0 = PA_3 | ALT0,
+    PA_4  = 0x04,
+    PA_4_ALT0 = PA_4 | ALT0,
+    PA_5  = 0x05,
+    PA_6  = 0x06,
+    PA_7  = 0x07,
+    PA_8  = 0x08,
+    PA_9  = 0x09,
+    PA_10 = 0x0A,
+    PA_11 = 0x0B,
+    PA_12 = 0x0C,
+    PA_13 = 0x0D,
+    PA_14 = 0x0E,
+    PA_15 = 0x0F,
+    PA_15_ALT0 = PA_15 | ALT0,
+
+    PB_0  = 0x10,
+    PB_1  = 0x11,
+    PB_2  = 0x12,
+    PB_3  = 0x13,
+    PB_3_ALT0 = PB_3 | ALT0,
+    PB_4  = 0x14,
+    PB_4_ALT0 = PB_4 | ALT0,
+    PB_5  = 0x15,
+    PB_5_ALT0 = PB_5 | ALT0,
+    PB_6  = 0x16,
+    PB_7  = 0x17,
+
+    PC_14 = 0x2E,
+    PC_15 = 0x2F,
+
+    // ADC internal channels
+    ADC_TEMP = 0xF0,
+    ADC_VREF = 0xF1,
+    ADC_VBAT = 0xF2,
+
+    // Arduino connector namings
+    A0          = PA_0,
+    A1          = PA_1,
+    A2          = PA_3,
+    A3          = PA_4,
+    A4          = PA_5,
+    A5          = PA_6,
+    A6          = PA_7,
+    A7          = PA_2,
+    D0          = PA_10,
+    D1          = PA_9,
+    D2          = PA_12,
+    D3          = PB_0,
+    D4          = PB_7,
+    D5          = PB_6,
+    D6          = PB_1,
+    D7          = PC_14,
+    D8          = PC_15,
+    D9          = PA_8,
+    D10         = PA_11,
+    D11         = PB_5,
+    D12         = PB_4,
+    D13         = PB_3,
+
+    // STDIO for console print
+#ifdef MBED_CONF_TARGET_STDIO_UART_TX
+    STDIO_UART_TX = MBED_CONF_TARGET_STDIO_UART_TX,
+#else
+    STDIO_UART_TX = PA_2,
+#endif
+#ifdef MBED_CONF_TARGET_STDIO_UART_RX
+    STDIO_UART_RX = MBED_CONF_TARGET_STDIO_UART_RX,
+#else
+    STDIO_UART_RX = PA_15,
+#endif
+
+    // Generic signals namings
+    LED1        = PB_3,
+    LED2        = PB_3,
+    LED3        = PB_3,
+    LED4        = PB_3,
+    SERIAL_TX   = STDIO_UART_TX,
+    SERIAL_RX   = STDIO_UART_RX,
+    USBTX       = STDIO_UART_TX,
+    USBRX       = STDIO_UART_RX,
+    I2C_SCL     = PB_6,
+    I2C_SDA     = PB_7,
+    SPI_MOSI    = PB_5,
+    SPI_MISO    = PB_4,
+    SPI_SCK     = PB_3,
+    SPI_CS      = PA_11,
+    PWM_OUT     = PB_0,
+
+    /**** USB pins ****/
+    USB_DM = PA_11,
+    USB_DP = PA_12,
+    USB_NOE = PA_13,
+
+    /**** OSCILLATOR pins ****/
+    RCC_OSC32_IN = PC_14,
+    RCC_OSC32_OUT = PC_15,
+
+    /**** DEBUG pins ****/
+    SYS_JTCK_SWCLK = PA_14,
+    SYS_JTDI = PA_15,
+    SYS_JTDO_SWO = PB_3,
+    SYS_JTMS_SWDIO = PA_13,
+    SYS_JTRST = PB_4,
+    SYS_PVD_IN = PB_7,
+    SYS_WKUP1 = PA_0,
+    SYS_WKUP4 = PA_2,
+
+    // Not connected
+    NC = (int)0xFFFFFFFF
+} PinName;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hcsr04.cpp	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,27 @@
+/*#include "hcsr04.h"
+#include "mbed.h"
+
+HCSR04::HCSR04(PinName t, PinName e) : trig(t), echo(e) {}
+ long HCSR04::echo_duration() {
+        
+    timer.reset();  //reset timer
+    trig=0;   // trigger low 
+    wait_us(2); //  wait 
+    trig=1;   //  trigger high
+    wait_us(10);
+    trig=0;  // trigger low
+         while(!echo); // start pulseIN
+      timer.start();
+     while(echo);
+      timer.stop();
+     return timer.read_us(); 
+ 
+}
+ 
+//return distance in cm 
+long HCSR04::distance(){
+    duration = echo_duration();
+  distance_cm = (duration/2)/29.1  ;
+        return distance_cm;
+ 
+}*/
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hcsr04.h	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,18 @@
+/*#ifndef hcsr04_H
+#define hcsr04_H
+#include "mbed.h"
+ 
+class HCSR04 {
+  public:
+    HCSR04(PinName t, PinName e);
+    long echo_duration();
+    long distance();
+ 
+    private:
+        DigitalOut trig;
+        DigitalIn echo;
+        Timer timer;
+        long duration,distance_cm;
+};
+ 
+#endif*/
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,32 @@
+#include "mbed.h"
+#include "DHT.h"
+#include "PinNames.h"
+ 
+Serial pc(USBTX, USBRX);
+ 
+DigitalOut myled(LED1);
+ 
+DHT sensor(PA_0,SEN11301P);
+ 
+int main() {
+    pc.printf("Test minicom.\r\n");
+    int err;
+    printf("\r\nDHT Test program");
+    printf("\r\n******************\r\n");
+    wait(1); // wait 1 second for device stable status
+    while (1) {
+        myled = 1;
+        err = sensor.readData();
+        if (err == 0) {
+            printf("Temperature is %4.2f C \r\n",sensor.ReadTemperature(CELCIUS));
+            printf("Temperature is %4.2f F \r\n",sensor.ReadTemperature(FARENHEIT));
+            printf("Temperature is %4.2f K \r\n",sensor.ReadTemperature(KELVIN));
+            printf("Humidity is %4.2f \r\n",sensor.ReadHumidity());
+            printf("Dew point is %4.2f  \r\n",sensor.CalcdewPoint(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity()));
+            printf("Dew point (fast) is %4.2f  \r\n",sensor.CalcdewPointFast(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity()));
+        } else
+            printf("\r\nErr %i \n",err);
+        myled = 0;
+        wait(5);
+    }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Jul 06 13:59:08 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file