Revision 1:766cbce5e5b7, committed 2020-10-05

Comitter:

armochim

Date:

Mon Oct 05 12:44:55 2020 +0000

Parent:

0:3588368c5b3c

Commit message:

A water flow control system using a LCD display, a KY-040 type rotary encoder and a YF-S201 water flow sensor.Uses DebounceIn to generate interrupts from rotary encoder signal

Changed in this revision

diff -r 3588368c5b3c -r 766cbce5e5b7 TextLCD.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCD.lib	Mon Oct 05 12:44:55 2020 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/oscarvzfz/code/TextLCD/#d824a83e56e3

diff -r 3588368c5b3c -r 766cbce5e5b7 main.cpp
--- a/main.cpp	Sun Dec 20 12:05:24 2015 +0000
+++ b/main.cpp	Mon Oct 05 12:44:55 2020 +0000
@@ -1,21 +1,127 @@
-/** A demo program for DebounceIn
+/* A waterflow system based on a demo program for DebounceIn
  * Takuo WATANABE
  * http://mbed.org/users/takuo/code/DebounceIn/
+ * Uses a rotary encoder Ky-040 and a YF-S201 as a water flow sensor
  */
 
 #include "mbed.h"
 #include "DebounceIn.h"
+#include "TextLCD.h"
+DigitalOut rele(PA_12);
+DigitalOut led(PC_13);
+I2C i2c_lcd(PB_9,PB_8); // SDA, SCL
+TextLCD_I2C lcd(&i2c_lcd, 0x7E, TextLCD::LCD16x2, TextLCD::HD44780); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type 
+InterruptIn sensor(PA_15);// Interrupt pin for the water flow sensor YF-S201
+float Calc; //The sensor gives 450 pulses per liter
+float FlowMililiter,TotalMililiter,mil; //Variables to calculate the water flow
+float CorrectionFactor=0.23;//to correct the volume through the sensor
+int NbTopsFan; // To keep track os YF-S201 pulses
+DebounceIn buttonSW(PB_6);//Roary encoder button switch
+DebounceIn buttonA(PB_3);//CLK of sensor. Pin to generate the interrupt
+bool flag=false; //flag used to control the program
+volatile float virtualPosition=0;//Position of the shaft
 
-int nrise = 0, nfall = 0;
-void rise() { nrise++; }
-void fall() { nfall++; }
+
+
+int i=0;
+
+void lcd_initiation()
+        {
+        lcd.setMode(TextLCD::DispOn); //DispOff, DispOn
+        lcd.setBacklight(TextLCD::LightOff);//LightOff, LightOn /LightOff BackLight is on!!
+        lcd.setCursor(TextLCD::CurOff_BlkOff);//CurOff_BlkOff, CurOn_BlkOff, CurOff_BlkOn, CurOn_BlkOn
+        
+        }
+
+void setpoint()
+{    
+    lcd.cls();
+    lcd.locate(5,0);
+    lcd.printf("ZarBeer");
+    lcd.locate(0,1);
+    lcd.printf("Setpoint:  %.1f",virtualPosition);
+}
+       
+
+
+void cw() {if (!DigitalIn(PB_4)) virtualPosition+=0.5;
+                else
+                virtualPosition-=0.5;
+            if(virtualPosition>20){virtualPosition=20;}
+            if(virtualPosition<0){virtualPosition=0;}
+            setpoint();
+          }
+   
+void rpm()     //This function increments on the rising edge of the hall effect sensors signal
+{ 
+  NbTopsFan++;  
+}   
+        
+//After define the set point the valve is open and the water is added until the setpoint.
+void adiciona()
+    { 
+   while(1) {
+        rele=1;//Open solenoid valve 
+        NbTopsFan = 0;                  //Set NbTops to 0 ready for calculations
+        
+        sensor.rise(&rpm);              //Enables rising edge interrupt
+        wait_ms(1000);                  //Wait 1 second and count HALL pulses
+        sensor.rise(NULL);              //Disable interrupt
+                
+        Calc = (NbTopsFan / 7.5)*(1+CorrectionFactor);  //(Pulse frequency x 60) / 7.5Q, = flow rate in L/hour
+        FlowMililiter=Calc/60;//Flow in minutes. The sensor gives Pulse Frequency/7.5 equals l/min
+        TotalMililiter+=FlowMililiter;//Add the flow to calculate the total volume that was added.
+        lcd.cls(); //Clear the LCD screen
+        lcd.locate(0,0);//
+        lcd.printf("Fl:%.2f",Calc);
+        lcd.locate(0,1);
+        lcd.printf("V:%.2f",TotalMililiter);
+        lcd.locate(8,1);
+        lcd.printf("SP: %.1f",virtualPosition);
+           if(TotalMililiter>=virtualPosition) 
+           {rele=0; //Turn off solenoid valve 
+           lcd.cls();
+           lcd.locate(0,1);
+           lcd.printf("     Acabou!");
+           led=0;
+           Calc=0;
+           FlowMililiter=0;
+           TotalMililiter=0;
+           virtualPosition=0;
+           wait(3);
+           return;
+            }
+            
+        }
+    }
+    //Set the desired volume
+void confirma() {
+    
+    lcd.locate(0,1);
+    lcd.printf("Confirma: %.1f L", virtualPosition);
+    while(flag==true) {
+        led=1;
+    }
+    return;
+        }
+void SW() {
+        lcd.cls();
+    if (flag==true) {flag=false;}
+    else {flag=true;}
+            }
+            
 
 int main() {
-    DebounceIn button(p14);
-    button.rise(rise);
-    button.fall(fall);
+    lcd_initiation();
+ 
+    
+    buttonA.rise(cw);
+    buttonSW.fall(SW);
     while (true) {
-        printf("nrise=%d, nfall=%d\n", nrise, nfall);
-        wait(1);
+       if (flag==true){
+        confirma();
+        adiciona(); 
+        
+        }
     }
 }