token board using LCD

diff --git a/groveLCD.py b/groveLCD.py
new file mode 100644 (file)
index 0000000..27cb53e
--- /dev/null
+++ b/groveLCD.py
@@ -0,0 +1,79 @@
+import machine, time
+
+i2c=machine.I2C(0)
+
+
+# this device has two I2C addresses
+DISPLAY_RGB_ADDR = 0x62
+DISPLAY_TEXT_ADDR = 0x3e
+
+RGB_REG0=0x00
+RGB_REG1=0x01
+RGB_REG5=0x08
+RGB_REGR=0x04
+RGB_REGG=0x03
+RGB_REGB=0x02
+
+i2c=machine.I2C(0)
+
+def reg_write(i2c,addr,reg,data):
+    msg=bytearray()
+    msg.append(data)
+    i2c.writeto_mem(addr,reg,msg)
+
+# set backlight to (R,G,B) (values from 0..255 for each)
+def setRGB(r,g,b):
+    reg_write(i2c,DISPLAY_RGB_ADDR,RGB_REG0,0) 
+    reg_write(i2c,DISPLAY_RGB_ADDR,RGB_REG1,0)
+    reg_write(i2c,DISPLAY_RGB_ADDR,RGB_REG5,0xaa) 
+    reg_write(i2c,DISPLAY_RGB_ADDR,RGB_REGR,r)
+    reg_write(i2c,DISPLAY_RGB_ADDR,RGB_REGG,g)
+    reg_write(i2c,DISPLAY_RGB_ADDR,RGB_REGB,b)
+    
+def textCommand(cmd):
+    reg_write(i2c,DISPLAY_TEXT_ADDR,0x80,cmd)
+    
+def setText(text):
+    textCommand(0x01)
+    time.sleep(.05)
+    textCommand(0x08 | 0x04)
+    textCommand(0x28)
+    time.sleep(.05)
+    count=0
+    row=0
+    for c in text:
+        if c == '\n' or count == 16:
+            count=0
+            row+=1
+            if row ==2:
+                break
+            textCommand(0xc0)
+            if c == '\n':
+                continue
+        count +=1
+        reg_write(i2c,DISPLAY_TEXT_ADDR,0x40,ord(c))
+        
+def setText_norefresh(text):
+    textCommand(0x02) # return home
+    time.sleep(.05)
+    textCommand(0x08 | 0x04) # display on, no cursor
+    textCommand(0x28) # 2 lines
+    time.sleep(.05)
+    count = 0
+    row = 0
+    while len(text) < 32: #clears the rest of the screen
+        text += ' '
+    for c in text:
+        if c == '\n' or count == 16:
+            count = 0
+            row += 1
+            if row == 2:
+                break
+            textCommand(0xc0)
+            if c == '\n':
+                continue
+        count += 1
+        reg_write(i2c,DISPLAY_TEXT_ADDR,0x40,ord(c))
+        
+def clearText():
+    textCommand(0x01)
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diff --git a/lcdToken.py b/lcdToken.py
new file mode 100644 (file)
index 0000000..23bac18
--- /dev/null
+++ b/lcdToken.py
@@ -0,0 +1,78 @@
+import machine, time, random
+import groveLCD as lcd
+
+global count
+count=0
+
+def updateDisplay():
+    lcd.setText_norefresh("Number of stamps\n       %d" %count)
+    
+lcd.setRGB(50,0,50)
+lcd.clearText()
+lcd.setText_norefresh("Hello Marcus!")
+time.sleep(2)
+updateDisplay()
+
+btnP=machine.Pin(15,machine.Pin.IN,machine.Pin.PULL_UP)
+btnD=machine.Pin(16,machine.Pin.IN,machine.Pin.PULL_UP)
+
+global btnP_pressed
+btnP_pressed=False
+
+global btnD_pressed
+btnD_pressed=False
+
+# button handlers (interrupts)
+def btn_reader(pin):
+    btn=pin
+    while True:
+        if btnP.value()==0:
+            btnP_pressed=True
+            increment()
+            time.sleep(0.5)
+            btnP_pressed=False
+        elif btnD.value()==0:
+            btnD_pressed=True
+            decrement()
+            time.sleep(0.5)
+            btnD_pressed=False
+    
+def increment():
+    global count
+    count+=1
+    global r
+    global g
+    global b
+    r=0
+    g=0
+    b=0
+    def setR():
+        global r
+        r=random.randrange(50)
+        return r
+    def setG():
+        global g
+        g=random.randrange(50)
+        return g
+    def setB():
+        b=random.randrange(50)
+        return b
+    if (count%10)==0:
+        setR();setG();setB()
+        lcd.setRGB(r,g,b)
+        lcd.setText("Good Job Marcus!\n Pick a prize")
+        time.sleep(3)
+        lcd.setRGB(50,0,50)
+    updateDisplay()
+    return count
+    
+def decrement():
+    global count
+    count-=1
+    updateDisplay()
+    return count
+
+btnP.irq(trigger=machine.Pin.IRQ_FALLING,handler=btn_reader(btnP))
+btnD.irq(trigger=machine.Pin.IRQ_FALLING,handler=btn_reader(btnD))
+
+# TODO put special surprise if reach "full" board <66>
\ No newline at end of file