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A water flow control system using a LCD display, a rotary encoder KY-040 and a YF-S201 water flow sensor. It uses DebounceIn to generate interrupts from rotary encoder signal.
Dependencies: mbed DebounceIn TextLCD
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
TextLCD.lib | Show annotated file Show diff for this revision Revisions of this file |
main.cpp | Show annotated file Show diff for this revision Revisions of this file |
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(); + + } } }