Diff: lib_SHT/lib_SHT11.cpp

Revision:

0:dca3b291558e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib_SHT/lib_SHT11.cpp	Thu Oct 23 09:42:24 2014 +0000
@@ -0,0 +1,262 @@
+#include "lib_SHT11.h"
+
+
+SHT11::SHT11(PinName pin_DATA, PinName pin_SCK, float T_C_mesure) : DATA_HT(pin_DATA), SCK_HT(pin_SCK), Temps_cycle_mesure(T_C_mesure)
+{
+    if(Temps_cycle_mesure < 2)  Temps_cycle_mesure = 2;
+    init();
+}
+
+void SHT11::start(void)
+{
+    DATA_HT.output();
+    DATA_HT=1;
+    SCK_HT=0;
+//    wait_us(1);
+    SCK_HT=1;
+//    wait_us(1);
+    DATA_HT=0;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+    SCK_HT=1;
+//    wait_us(1);
+    DATA_HT=1;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+    DATA_HT=0;
+}
+
+void SHT11::changer_timer_cycle(float new_Temps_cycle_mesure)
+{
+    if(new_Temps_cycle_mesure < 2)  Temps_cycle_mesure = 2;
+    else Temps_cycle_mesure = new_Temps_cycle_mesure;
+    if(etat_cycle)  desactiver();   init();
+}
+
+void SHT11::init(void)
+{
+//       ____________________________________________  
+// DATA                                              |__
+//            __   __   __   __   __   __   __   __   __
+// SCK_HT   _|  |_|  |_|  |_|  |_|  |_|  |_|  |_|  |_|  |_
+    unsigned char i;
+    DATA_HT.output();
+    DATA_HT=1;
+    SCK_HT=0;
+    for (i=0;i<9;i++)
+    {
+        SCK_HT=1;
+//        wait_us(1);
+        SCK_HT=0;
+//        wait_us(1);
+    }
+        etat_sht11=0;
+        etat_cycle=1;
+        Timer_cycle_mesure.attach(this, &SHT11::gestion_HT, Temps_cycle_mesure);
+}
+
+void SHT11::desactiver(void)
+{
+        etat_cycle=0;
+        Timer_cycle_mesure.detach();
+}
+
+void SHT11::demande_mesure(short octet_de_commande)
+{
+    unsigned int i;
+
+    DATA_HT.output();
+    for(i=0;i<8;i++)
+    {              
+        if ((octet_de_commande)&(0x80)) DATA_HT=1;
+        else DATA_HT=0;
+//        wait_us(1);
+        SCK_HT=1;
+//        wait_us(1);
+        SCK_HT=0;
+        octet_de_commande=octet_de_commande*2;
+    }
+    DATA_HT.input();
+//    wait_us(1);
+    SCK_HT=1;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+    DATA_HT.output();
+    DATA_HT=1;
+    DATA_HT.input();
+}
+
+void SHT11::mesure_T(void)
+{
+    start();
+    demande_mesure(3);
+}
+
+void SHT11::mesure_H(void)
+{
+    start();
+    demande_mesure(5);
+}
+
+void SHT11::calcul_Temperature_Humidite(void)
+{
+    Temperature_mesuree=(Temperature*0.01-40);
+    Humidite_mesuree=((float)Temperature_mesuree-25.0)*(0.01+(0.00008*Humidite))-4+0.0405*Humidite-0.0000028*Humidite*Humidite;
+}
+
+void SHT11::reception_mesure_T(void)
+{
+    unsigned int i;
+    Temperature=0;
+
+        DATA_HT.input();
+    for (i=0;i<8;i++)
+    {
+        SCK_HT=1;
+//        wait_us(1);
+        Temperature *=2;
+        if (DATA_HT==1) Temperature++;
+        SCK_HT=0;
+//        wait_us(1);
+    }
+    DATA_HT.output();
+    DATA_HT=0;
+    SCK_HT=1;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+    DATA_HT.input();
+    for (i=0;i<8;i++)
+    {
+        SCK_HT=1;
+//        wait_us(1);
+        Temperature *=2;
+        if (DATA_HT==1) Temperature++;
+        SCK_HT=0;
+//        wait_us(1);
+    }
+    DATA_HT.output();
+    DATA_HT=1;
+    SCK_HT=1;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+}
+
+void SHT11::reception_mesure_H(void)
+{
+    unsigned int i;
+    Humidite=0;
+
+        DATA_HT.input();
+    for (i=0;i<8;i++)
+    {
+        SCK_HT=1;
+//        wait_us(1);
+        Humidite *=2;
+        if (DATA_HT==1) Humidite++;
+        SCK_HT=0;
+//        wait_us(1);
+    }
+    DATA_HT.output();
+    DATA_HT=0;
+    SCK_HT=1;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+    DATA_HT.input();
+    for (i=0;i<8;i++)
+    {
+        SCK_HT=1;
+//        wait_us(1);
+        Humidite *=2;
+        if (DATA_HT==1) Humidite++;
+        SCK_HT=0;
+//        wait_us(1);
+    }
+    DATA_HT.output();
+    DATA_HT=1;
+    SCK_HT=1;
+//    wait_us(1);
+    SCK_HT=0;
+//    wait_us(1);
+}
+
+void SHT11::gestion_HT(void)
+{   
+    switch (etat_sht11)
+    {
+        case 0:
+        Timer_cycle_mesure.detach();
+        mesure_T();
+        etat_sht11=1;
+        Timer_cycle_mesure.attach_us(this, &SHT11::gestion_HT, 10000);
+        break;
+        
+        case 1:
+        DATA_HT.input();
+        if (DATA_HT==0)
+        {
+            Timer_cycle_mesure.detach();
+            etat_sht11=2;
+            Timer_cycle_mesure.attach_us(this, &SHT11::gestion_HT, 1);
+        }
+        break;
+        
+        case 2:
+        Timer_cycle_mesure.detach();
+        reception_mesure_T();
+        etat_sht11=3;
+        Timer_cycle_mesure.attach_us(this, &SHT11::gestion_HT, 1);
+        break;
+        
+        case 3:
+        Timer_cycle_mesure.detach();
+        mesure_H();
+        etat_sht11=4;
+        Timer_cycle_mesure.attach_us(this, &SHT11::gestion_HT, 10000);
+        break;
+        
+        case 4:
+        DATA_HT.input();
+        if (DATA_HT==0)
+        {
+            Timer_cycle_mesure.detach();
+            etat_sht11=5;
+            Timer_cycle_mesure.attach_us(this, &SHT11::gestion_HT, 1);
+        }
+        break;
+
+        case 5:
+        Timer_cycle_mesure.detach();
+        reception_mesure_H();
+        calcul_Temperature_Humidite();
+        etat_sht11=0;
+        Timer_cycle_mesure.attach(this, &SHT11::gestion_HT, Temps_cycle_mesure);
+        break;
+
+        default:
+        etat_sht11=0;
+        break;
+    }
+}
+
+float SHT11::lire_T(void)
+{
+    return Temperature_mesuree;
+}
+
+float SHT11::lire_H(void)
+{
+    return Humidite_mesuree;
+}
+
+void SHT11::lire_T_H(float *pointeur_Temperature, float *pointeur_Humidite)
+{
+    *pointeur_Temperature = Temperature_mesuree;
+    *pointeur_Humidite = Humidite_mesuree;
+}
+