test turn off display, stub color methods
This commit is contained in:
janeptrv
parent
1dd871da07
commit
76715d1dc2
104
leds.py
104
leds.py
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@ -8,6 +8,7 @@
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from time import sleep
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class Adafruit_CharLCD:
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# commands
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@ -52,9 +53,7 @@ class Adafruit_CharLCD:
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LCD_5x10DOTS = 0x04
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LCD_5x8DOTS = 0x00
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def __init__(self, pin_rs=24, pin_e=23, pins_db=[17, 18, 27, 22], GPIO = None):
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def __init__(self, pin_rs=24, pin_e=23, pins_db=[17, 18, 27, 22], GPIO=None):
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# Emulate the old behavior of using RPi.GPIO if we haven't been given
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# an explicit GPIO interface to use
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if not GPIO:
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@ -85,11 +84,11 @@ class Adafruit_CharLCD:
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""" Initialize to default text direction (for romance languages) """
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self.displaymode = self.LCD_ENTRYLEFT | self.LCD_ENTRYSHIFTDECREMENT
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self.write4bits(self.LCD_ENTRYMODESET | self.displaymode) # set the entry mode
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self.write4bits(self.LCD_ENTRYMODESET |
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self.displaymode) # set the entry mode
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self.clear()
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def begin(self, cols, lines):
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if (lines > 1):
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@ -97,116 +96,103 @@ class Adafruit_CharLCD:
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self.displayfunction |= self.LCD_2LINE
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self.currline = 0
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def home(self):
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self.write4bits(self.LCD_RETURNHOME) # set cursor position to zero
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self.delayMicroseconds(3000) # this command takes a long time!
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def clear(self):
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self.write4bits(self.LCD_CLEARDISPLAY) # command to clear display
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self.delayMicroseconds(3000) # 3000 microsecond sleep, clearing the display takes a long time
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# 3000 microsecond sleep, clearing the display takes a long time
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self.delayMicroseconds(3000)
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def setCursor(self, col, row):
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self.row_offsets = [ 0x00, 0x40, 0x14, 0x54 ]
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self.row_offsets = [0x00, 0x40, 0x14, 0x54]
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if ( row > self.numlines ):
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if (row > self.numlines):
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row = self.numlines - 1 # we count rows starting w/0
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self.write4bits(self.LCD_SETDDRAMADDR | (col + self.row_offsets[row]))
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def noDisplay(self):
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""" Turn the display off (quickly) """
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self.displaycontrol &= ~self.LCD_DISPLAYON
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self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
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def display(self):
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""" Turn the display on (quickly) """
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self.displaycontrol |= self.LCD_DISPLAYON
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self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
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def noCursor(self):
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""" Turns the underline cursor on/off """
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self.displaycontrol &= ~self.LCD_CURSORON
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self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
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def cursor(self):
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""" Cursor On """
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self.displaycontrol |= self.LCD_CURSORON
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self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
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def noBlink(self):
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""" Turn on and off the blinking cursor """
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self.displaycontrol &= ~self.LCD_BLINKON
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self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
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def noBlink(self):
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""" Turn on and off the blinking cursor """
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self.displaycontrol &= ~self.LCD_BLINKON
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self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
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def DisplayLeft(self):
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""" These commands scroll the display without changing the RAM """
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self.write4bits(self.LCD_CURSORSHIFT | self.LCD_DISPLAYMOVE | self.LCD_MOVELEFT)
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self.write4bits(self.LCD_CURSORSHIFT |
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self.LCD_DISPLAYMOVE | self.LCD_MOVELEFT)
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def scrollDisplayRight(self):
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""" These commands scroll the display without changing the RAM """
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self.write4bits(self.LCD_CURSORSHIFT | self.LCD_DISPLAYMOVE | self.LCD_MOVERIGHT);
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self.write4bits(self.LCD_CURSORSHIFT |
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self.LCD_DISPLAYMOVE | self.LCD_MOVERIGHT)
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def leftToRight(self):
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""" This is for text that flows Left to Right """
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self.displaymode |= self.LCD_ENTRYLEFT
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self.write4bits(self.LCD_ENTRYMODESET | self.displaymode);
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self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
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def rightToLeft(self):
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""" This is for text that flows Right to Left """
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self.displaymode &= ~self.LCD_ENTRYLEFT
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self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
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def autoscroll(self):
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""" This will 'right justify' text from the cursor """
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self.displaymode |= self.LCD_ENTRYSHIFTINCREMENT
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self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
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def noAutoscroll(self):
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""" This will 'left justify' text from the cursor """
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self.displaymode &= ~self.LCD_ENTRYSHIFTINCREMENT
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self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
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def write4bits(self, bits, char_mode=False):
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""" Send command to LCD """
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self.delayMicroseconds(1000) # 1000 microsecond sleep
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bits=bin(bits)[2:].zfill(8)
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bits = bin(bits)[2:].zfill(8)
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self.GPIO.output(self.pin_rs, char_mode)
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@ -222,27 +208,27 @@ class Adafruit_CharLCD:
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for pin in self.pins_db:
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self.GPIO.output(pin, False)
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for i in range(4,8):
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for i in range(4, 8):
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if bits[i] == "1":
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self.GPIO.output(self.pins_db[::-1][i-4], True)
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self.pulseEnable()
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def delayMicroseconds(self, microseconds):
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seconds = microseconds / float(1000000) # divide microseconds by 1 million for seconds
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# divide microseconds by 1 million for seconds
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seconds = microseconds / float(1000000)
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sleep(seconds)
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def pulseEnable(self):
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self.GPIO.output(self.pin_e, False)
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self.delayMicroseconds(1) # 1 microsecond pause - enable pulse must be > 450ns
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# 1 microsecond pause - enable pulse must be > 450ns
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self.delayMicroseconds(1)
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self.GPIO.output(self.pin_e, True)
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self.delayMicroseconds(1) # 1 microsecond pause - enable pulse must be > 450ns
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# 1 microsecond pause - enable pulse must be > 450ns
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self.delayMicroseconds(1)
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self.GPIO.output(self.pin_e, False)
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self.delayMicroseconds(1) # commands need > 37us to settle
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def message(self, text):
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""" Send string to LCD. Newline wraps to second line"""
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@ -250,15 +236,55 @@ class Adafruit_CharLCD:
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if char == '\n':
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self.write4bits(0xC0) # next line
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else:
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self.write4bits(ord(char),True)
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self.write4bits(ord(char), True)
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def lightlevel(lcd, level):
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print("display level")
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lcd.clear()
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lcd.message("Light Level:\n]" + "-"*level + "[")
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def querylightlevel():
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print("NYI")
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return 7
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def color(lcd, col):
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lcd.clear()
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lcd.message("new color:\n#" + col)
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print("NYI")
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def querycolor():
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print("NYI")
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return "ffffff"
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def loop():
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lcd = Adafruit_CharLCD()
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while True:
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level = 0
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level_max = 15
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idle = 0
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idle_max = 15
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cur_color = "ffffff"
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print("loop")
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lcd.clear()
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lcd.message(" LCD 1602 Test \n123456789ABCDEF")
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sleep(2)
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query_color = querycolor()
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level = querylightlevel()
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idle = idle + 1
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if idle >= idle_max:
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idle = idle_max
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lcd.noDisplay()
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elif query_color != cur_color:
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if lcd.displaycontrol & lcd.LCD_DISPLAYON != lcd.displaycontrol:
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lcd.display()
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ccolor = query_color
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color(lcd, cur_color)
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else:
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if lcd.displaycontrol & lcd.LCD_DISPLAYON != lcd.displaycontrol:
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lcd.display()
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lightlevel(lcd, level)
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sleep(1)
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if __name__ == '__main__':
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loop()
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