Reine - week 12

Interface and Application Programming

I made to make a GUI to communicate with my computer through serial port(USB). I programmed it in python using the Tkinter libray.
I wanted to control an LCD display and a hall effect sensor.

I started to create frames on the GUI where different parts will be placed.

Then I labed where to input the text for the LCD and where to display the value from hall effect sensor.

I wanted to use the PCB board I work on in output device, but it didn't work and I couldn't figure out the exact issue. I thought it was caused by badly clocking the microcontroller.

So I designed another board for the assignment where I include the crystal oscillator of 8Mhz, to see if the issue was caused by bad clocking.

But this board didn't work also from there I couldn't figure out what was the issue any more.

Programming

Program for GUI

from tkinter import *
class Interface:
     def __init__(self, master):
          self.leftframe = Frame(master, height=300, width=70)
          self.leftframe.pack(side=LEFT, fill=Y)
          self.topFrame = Frame(master, height=70, width=350)
        self.topFrame.pack(side=TOP, fill=X)
        self.middleFrame = Frame(master, height=90, width=350)
        self.middleFrame.pack(side=TOP, fill=X)
        self.bottomFrame = Frame(master, height=140, width=350)
        self.bottomFrame.pack(side=TOP, fill=X)
        self.rectangleCanvas = Canvas(self.bottomFrame, height=50, width=250, bg='red')
        self.rectangleCanvas.grid(padx=10, pady=45, row=1)
        self.createVisualWidget()
        
    def createVisualWidget(self):
        self.LCD_label = Label(self.middleFrame, text="LCD Text", anchor=N)
        self.LCD_label.grid()
        self.LCD_entry = Entry(self.middleFrame, width=25)
        self.LCD_entry.grid(row=1, column=0, padx=10, sticky=E)
        self.send_button = Button(self.middleFrame, text="Send", takefocus=True)
        self.send_button.grid(row=1, column=1, sticky=E)
        self.northRect = self.rectangleCanvas.create_rectangle(0, 0, 180, 50, fill='blue')
        
root = Tk()
app = Interface(root)
root.title("Serial interface")
root.mainloop()

Program for Serial interface

import serial

ser = serial.Serial('/dev/ttyUSB1', 115200, timeout=5)
ser.readline()
ser.write(b'hello')
ser.read(10)
ser.close()

Program for Microcontroller

#include <SoftwareSerial.h>
#include <LiquidCrystal.h>

SoftwareSerial mySerial(PB0, PB1);
LiquidCrystal lcd(5, 4, 3, 2, 1);

char msg[];

void setup(){
    mySerial.begin(115200);
    lcd.beging(2,16);
    
    lcd.print("hello world");
    delay(1000);
    lcd.clear();
}

void loop(){
    if (mySerial.available()){
        while(mySerial.read() != 0){
            msg = mySerial.read();
            lcd.print(msg);
        }
    }
    delay(100);
}

On this assignment I failed to make it work and I didn't get the reason why.

Downloads

Files used can be downloaded Here