morseanalyser/main.py

#   morse code analyser
from PicoAirQuality import  KitronikBME688, KitronikButton, KitronikDataLogger, \
                            KitronikOLED, KitronikRTC, KitronikZIPLEDs,\
                            KitronikBuzzer
import time

mindex=0
morse = []
oled = KitronikOLED()
rtc = KitronikRTC()
zipleds = KitronikZIPLEDs(3)
rtc.setDate(16, 7, 2022)
rtc.setTime(12, 10, 0)
rate = 50 # 20 wpm

#sec = 0
#f = open(logFileName, 'a')
#f.write("# Data Logging: Date, Time, Temperature, Pressure, Humidity, AirQuality, CO2\n")

beeper  = KitronikBuzzer()
buttons = KitronikButton()
last_pv = 0
last_tt = 0
spurious = 0 # interrupts are often repeated for the low level
button_state = 0 # on==1 off==0


def header():
    global rate, oled
    s = "Morse rate " + str(rate) + " mS"
    oled.displayText(s,1,0)
    
def ButtonA_f_IRQHandler(pin):
    global rate, oled
    rate += 10
    if rate > 100:
        rate = 40
    oled.clear()
    header()
    print (" IRQ button A" + str(rate))
    
def ButtonB_f_IRQHandler(pin):
    global last_pv, last_tt, spurious, mindex
    pv = pin.value()
    tt  = time.ticks_ms()
    #print("button B IRQ", tt, pv)
    if last_pv ==   pv  : # get get spurious 0 level ints
        #print("two   ints @ same level in a row",pv) # ignore
        spurious += 1
    else:
        #b=buttonEvent(time.ticks_ms(),pv)
        d = tt - last_tt
        if pv:
            #print(" duration of inter-m space ", d)
            if d < rate*3:
                print (" ")
            else:
                print (" ipi ")
                mindex += 1;
            beeper.playTone(600)
            button_state = 1
        else:
            #print(" duration of press ", d)
            if d > rate*3:
                morse.append("-");
                print ("DAH")
            else:
                morse.append(".");
                print ("DIT")
            beeper.stopTone()
            button_state = 0
    last_pv = pv
    last_tt = tt
      
buttons.buttonB.irq(trigger=machine.Pin.IRQ_FALLING|machine.Pin.IRQ_RISING, \
                    handler=ButtonB_f_IRQHandler)

buttons.buttonA.irq(trigger=machine.Pin.IRQ_RISING, handler=ButtonA_f_IRQHandler)

charbuf = []
hpm=10
vpm=2
def printm(mchar):
    global hpm, oled, vpm, charbuf
    charbuf.append(mchar)
    chcnt = 0
    oled.clear()
    header()
    while len(charbuf) > (4*20):
        charbuf.pop(0) # get rid of old morse
    for i in range(2,6):
        for j in range (0,20):
           chcnt += 1
           if len(charbuf) > chcnt:
             oled.displayText(charbuf[chcnt], i, j*6)
           else:
             oled.displayText(' ', i, j*6)  
    oled.show()
    print(mchar);
    
def decode_morse():
    global morse
    dm_a = [".","-"]
    dm_b = ["-",".",".","."]
    dm_c = ["-",".","-","."]
    dm_d = ["-",".","."]
    dm_e = ["."]
    dm_f = [".",".","-","."]
    dm_g = ["-","-","."]
    dm_h = [".",".",".","."]
    dm_i = [".","."]
    dm_j = [".","-","-","-"]
    dm_k = ["-",".","-"]
    dm_l = [".","-",".","."]
    dm_m = ["-","-"]
    dm_n = ["-","."]
    dm_o = ["-","-","-"]    
    dm_p = [".","-","-","."]
    dm_q = ["-","-",".","-"]
    dm_r = [".","-","."]
    dm_s = [".",".","."]
    dm_t = ["-"]
    dm_u = [".",".","-"]
    dm_v = [".",".",".","-"]
    dm_w = [".","-","-"]
    dm_x = ["-",".",".","-"]
    dm_y = ["-",".","-","-"]
    dm_z = ["-","-",".","."]
    #
    dm_0 = ["-","-","-","-","-"]
    dm_1 = [".","-","-","-","-"]
    dm_2 = [".",".","-","-","-"] 
    dm_3 = [".",".",".","-","-"] 
    dm_4 = [".",".",".",".","-"]
    dm_5 = [".",".",".",".","."] 
    dm_6 = ["-",".",".",".","."] 
    dm_7 = ["-","-",".",".","."] 
    dm_8 = ["-","-","-",".","."] 
    dm_9 = ["-","-","-","-","."]
    #
    if morse == dm_a:
        return ("A")
    if morse == dm_b:
        return ("B")        
    if morse == dm_c:
        return ("C")
    if morse == dm_d:
        return ("D")        
    if morse == dm_e:
        return ("E")
    if morse == dm_f:
        return ("F")       
    if morse == dm_g:
        return ("G")      
    if morse == dm_h:
        return ("H")       
    if morse == dm_i:   
        return ("I")
    if morse == dm_j:   
        return ("J")  
    if morse == dm_k:   
        return ("K")
    if morse == dm_l:   
        return ("L")       
    if morse == dm_m:   
        return ("M")        
    if morse == dm_n:   
        return ("N")        
    if morse == dm_o:
        return ("O")
    if morse == dm_p:        
        return ("P")
    if morse == dm_q:        
        return ("Q")       
    if morse == dm_r:        
        return ("R")       
    if morse == dm_s:        
        return ("S")        
    if morse == dm_t:        
        return ("T")       
    if morse == dm_u:        
        return ("U")        
    if morse == dm_v:        
        return ("V")         
    if morse == dm_w:        
        return ("W")          
    if morse == dm_x:
        return ("X")      
    if morse == dm_y:
        return ("Y")     
    if morse == dm_z:
        return ("Z")        
    if morse == dm_0:
        return ("0")
    if morse == dm_1:
        return ("1")        
    if morse == dm_2:
        return ("2")       
    if morse == dm_3:
        return ("3")       
    if morse == dm_4:
        return ("4")        
    if morse == dm_5:
        return ("5")        
    if morse == dm_6:
        return ("6")       
    if morse == dm_7:
        return ("7")
    if morse == dm_8:
        return ("8")        
    if morse == dm_9:
        return ("9")       
    return("?")
        
        
last_was_space = 0
last_sp = 0
def process_morse():
    global last_tt, morse, last_was_space, last_sp
    tt  = time.ticks_ms()
    if (button_state == 0):
        if (tt - last_tt) > rate*6:
            # morse chacter complete
            if (len(morse) > 0):
                #print(morse)
                printm(decode_morse())
                morse = []
                last_was_space = 0
                last_sp = last_tt
  
        if (tt - last_sp) > rate*22 : # and last_not_space == 0:
            if last_was_space == 0:
                printm(" ");
            last_was_space = 1 # dont keep repeating inter word spaces
            last_sp = last_tt
        
   
    
    
while True:
    process_morse()