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test turn off display, stub color methods

This commit is contained in:
janeptrv 2020-11-03 20:38:58 -05:00
parent 1dd871da07
commit 76715d1dc2
1 changed files with 165 additions and 139 deletions
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104
leds.py
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@ -8,6 +8,7 @@
from time import sleep from time import sleep
class Adafruit_CharLCD: class Adafruit_CharLCD:
# commands # commands
@ -52,9 +53,7 @@ class Adafruit_CharLCD:
LCD_5x10DOTS = 0x04 LCD_5x10DOTS = 0x04
LCD_5x8DOTS = 0x00 LCD_5x8DOTS = 0x00
def __init__(self, pin_rs=24, pin_e=23, pins_db=[17, 18, 27, 22], GPIO=None):
def __init__(self, pin_rs=24, pin_e=23, pins_db=[17, 18, 27, 22], GPIO = None):
# Emulate the old behavior of using RPi.GPIO if we haven't been given # Emulate the old behavior of using RPi.GPIO if we haven't been given
# an explicit GPIO interface to use # an explicit GPIO interface to use
if not GPIO: if not GPIO:
@ -85,11 +84,11 @@ class Adafruit_CharLCD:
""" Initialize to default text direction (for romance languages) """ """ Initialize to default text direction (for romance languages) """
self.displaymode = self.LCD_ENTRYLEFT | self.LCD_ENTRYSHIFTDECREMENT self.displaymode = self.LCD_ENTRYLEFT | self.LCD_ENTRYSHIFTDECREMENT
self.write4bits(self.LCD_ENTRYMODESET | self.displaymode) # set the entry mode self.write4bits(self.LCD_ENTRYMODESET |
self.displaymode) # set the entry mode
self.clear() self.clear()
def begin(self, cols, lines): def begin(self, cols, lines):
if (lines > 1): if (lines > 1):
@ -97,116 +96,103 @@ class Adafruit_CharLCD:
self.displayfunction |= self.LCD_2LINE self.displayfunction |= self.LCD_2LINE
self.currline = 0 self.currline = 0
def home(self): def home(self):
self.write4bits(self.LCD_RETURNHOME) # set cursor position to zero self.write4bits(self.LCD_RETURNHOME) # set cursor position to zero
self.delayMicroseconds(3000) # this command takes a long time! self.delayMicroseconds(3000) # this command takes a long time!
def clear(self): def clear(self):
self.write4bits(self.LCD_CLEARDISPLAY) # command to clear display self.write4bits(self.LCD_CLEARDISPLAY) # command to clear display
self.delayMicroseconds(3000) # 3000 microsecond sleep, clearing the display takes a long time # 3000 microsecond sleep, clearing the display takes a long time
self.delayMicroseconds(3000)
def setCursor(self, col, row): def setCursor(self, col, row):
self.row_offsets = [ 0x00, 0x40, 0x14, 0x54 ] self.row_offsets = [0x00, 0x40, 0x14, 0x54]
if ( row > self.numlines ): if (row > self.numlines):
row = self.numlines - 1 # we count rows starting w/0 row = self.numlines - 1 # we count rows starting w/0
self.write4bits(self.LCD_SETDDRAMADDR | (col + self.row_offsets[row])) self.write4bits(self.LCD_SETDDRAMADDR | (col + self.row_offsets[row]))
def noDisplay(self): def noDisplay(self):
""" Turn the display off (quickly) """ """ Turn the display off (quickly) """
self.displaycontrol &= ~self.LCD_DISPLAYON self.displaycontrol &= ~self.LCD_DISPLAYON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def display(self): def display(self):
""" Turn the display on (quickly) """ """ Turn the display on (quickly) """
self.displaycontrol |= self.LCD_DISPLAYON self.displaycontrol |= self.LCD_DISPLAYON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def noCursor(self): def noCursor(self):
""" Turns the underline cursor on/off """ """ Turns the underline cursor on/off """
self.displaycontrol &= ~self.LCD_CURSORON self.displaycontrol &= ~self.LCD_CURSORON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def cursor(self): def cursor(self):
""" Cursor On """ """ Cursor On """
self.displaycontrol |= self.LCD_CURSORON self.displaycontrol |= self.LCD_CURSORON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def noBlink(self): def noBlink(self):
""" Turn on and off the blinking cursor """ """ Turn on and off the blinking cursor """
self.displaycontrol &= ~self.LCD_BLINKON self.displaycontrol &= ~self.LCD_BLINKON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def noBlink(self): def noBlink(self):
""" Turn on and off the blinking cursor """ """ Turn on and off the blinking cursor """
self.displaycontrol &= ~self.LCD_BLINKON self.displaycontrol &= ~self.LCD_BLINKON
self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol) self.write4bits(self.LCD_DISPLAYCONTROL | self.displaycontrol)
def DisplayLeft(self): def DisplayLeft(self):
""" These commands scroll the display without changing the RAM """ """ These commands scroll the display without changing the RAM """
self.write4bits(self.LCD_CURSORSHIFT | self.LCD_DISPLAYMOVE | self.LCD_MOVELEFT) self.write4bits(self.LCD_CURSORSHIFT |
self.LCD_DISPLAYMOVE | self.LCD_MOVELEFT)
def scrollDisplayRight(self): def scrollDisplayRight(self):
""" These commands scroll the display without changing the RAM """ """ These commands scroll the display without changing the RAM """
self.write4bits(self.LCD_CURSORSHIFT | self.LCD_DISPLAYMOVE | self.LCD_MOVERIGHT); self.write4bits(self.LCD_CURSORSHIFT |
self.LCD_DISPLAYMOVE | self.LCD_MOVERIGHT)
def leftToRight(self): def leftToRight(self):
""" This is for text that flows Left to Right """ """ This is for text that flows Left to Right """
self.displaymode |= self.LCD_ENTRYLEFT self.displaymode |= self.LCD_ENTRYLEFT
self.write4bits(self.LCD_ENTRYMODESET | self.displaymode); self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
def rightToLeft(self): def rightToLeft(self):
""" This is for text that flows Right to Left """ """ This is for text that flows Right to Left """
self.displaymode &= ~self.LCD_ENTRYLEFT self.displaymode &= ~self.LCD_ENTRYLEFT
self.write4bits(self.LCD_ENTRYMODESET | self.displaymode) self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
def autoscroll(self): def autoscroll(self):
""" This will 'right justify' text from the cursor """ """ This will 'right justify' text from the cursor """
self.displaymode |= self.LCD_ENTRYSHIFTINCREMENT self.displaymode |= self.LCD_ENTRYSHIFTINCREMENT
self.write4bits(self.LCD_ENTRYMODESET | self.displaymode) self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
def noAutoscroll(self): def noAutoscroll(self):
""" This will 'left justify' text from the cursor """ """ This will 'left justify' text from the cursor """
self.displaymode &= ~self.LCD_ENTRYSHIFTINCREMENT self.displaymode &= ~self.LCD_ENTRYSHIFTINCREMENT
self.write4bits(self.LCD_ENTRYMODESET | self.displaymode) self.write4bits(self.LCD_ENTRYMODESET | self.displaymode)
def write4bits(self, bits, char_mode=False): def write4bits(self, bits, char_mode=False):
""" Send command to LCD """ """ Send command to LCD """
self.delayMicroseconds(1000) # 1000 microsecond sleep self.delayMicroseconds(1000) # 1000 microsecond sleep
bits=bin(bits)[2:].zfill(8) bits = bin(bits)[2:].zfill(8)
self.GPIO.output(self.pin_rs, char_mode) self.GPIO.output(self.pin_rs, char_mode)
@ -222,27 +208,27 @@ class Adafruit_CharLCD:
for pin in self.pins_db: for pin in self.pins_db:
self.GPIO.output(pin, False) self.GPIO.output(pin, False)
for i in range(4,8): for i in range(4, 8):
if bits[i] == "1": if bits[i] == "1":
self.GPIO.output(self.pins_db[::-1][i-4], True) self.GPIO.output(self.pins_db[::-1][i-4], True)
self.pulseEnable() self.pulseEnable()
def delayMicroseconds(self, microseconds): def delayMicroseconds(self, microseconds):
seconds = microseconds / float(1000000) # divide microseconds by 1 million for seconds # divide microseconds by 1 million for seconds
seconds = microseconds / float(1000000)
sleep(seconds) sleep(seconds)
def pulseEnable(self): def pulseEnable(self):
self.GPIO.output(self.pin_e, False) self.GPIO.output(self.pin_e, False)
self.delayMicroseconds(1) # 1 microsecond pause - enable pulse must be > 450ns # 1 microsecond pause - enable pulse must be > 450ns
self.delayMicroseconds(1)
self.GPIO.output(self.pin_e, True) self.GPIO.output(self.pin_e, True)
self.delayMicroseconds(1) # 1 microsecond pause - enable pulse must be > 450ns # 1 microsecond pause - enable pulse must be > 450ns
self.delayMicroseconds(1)
self.GPIO.output(self.pin_e, False) self.GPIO.output(self.pin_e, False)
self.delayMicroseconds(1) # commands need > 37us to settle self.delayMicroseconds(1) # commands need > 37us to settle
def message(self, text): def message(self, text):
""" Send string to LCD. Newline wraps to second line""" """ Send string to LCD. Newline wraps to second line"""
@ -250,15 +236,55 @@ class Adafruit_CharLCD:
if char == '\n': if char == '\n':
self.write4bits(0xC0) # next line self.write4bits(0xC0) # next line
else: else:
self.write4bits(ord(char),True) self.write4bits(ord(char), True)
def lightlevel(lcd, level):
print("display level")
lcd.clear()
lcd.message("Light Level:\n]" + "-"*level + "[")
def querylightlevel():
print("NYI")
return 7
def color(lcd, col):
lcd.clear()
lcd.message("new color:\n#" + col)
print("NYI")
def querycolor():
print("NYI")
return "ffffff"
def loop(): def loop():
lcd = Adafruit_CharLCD() lcd = Adafruit_CharLCD()
while True: while True:
level = 0
level_max = 15
idle = 0
idle_max = 15
cur_color = "ffffff"
print("loop") print("loop")
lcd.clear() query_color = querycolor()
lcd.message(" LCD 1602 Test \n123456789ABCDEF") level = querylightlevel()
sleep(2) idle = idle + 1
if idle >= idle_max:
idle = idle_max
lcd.noDisplay()
elif query_color != cur_color:
if lcd.displaycontrol & lcd.LCD_DISPLAYON != lcd.displaycontrol:
lcd.display()
ccolor = query_color
color(lcd, cur_color)
else:
if lcd.displaycontrol & lcd.LCD_DISPLAYON != lcd.displaycontrol:
lcd.display()
lightlevel(lcd, level)
sleep(1)
if __name__ == '__main__': if __name__ == '__main__':
loop() loop()