def __init__(self, i2c, i2c_addr, num_lines, num_columns):
self.i2c = i2c
self.i2c_addr = i2c_addr
# Send IODIR address, set IODIR to all inputs, init all other registers 0
self.i2c.send(b'\x00\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00', self.i2c_addr)
# Set pins GP1 thru GP7 to output, leave GP0 as input
self.i2c.mem_write(0x01, self.i2c_addr, IODIR)
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(5) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
# Put LCD into 4 bit mode
self.hal_write_init_nibble(self.LCD_FUNCTION)
delay(1)
LcdApi.__init__(self, num_lines, num_columns)
cmd = self.LCD_FUNCTION
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
def __init__(self, i2c, i2c_addr, num_lines, num_columns):
self.i2c = i2c
self.i2c_addr = i2c_addr
self.i2c.send(0, self.i2c_addr)
delay(20) # Allow LCD time to powerup
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(5) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
# Put LCD into 4 bit mode
self.hal_write_init_nibble(self.LCD_FUNCTION)
delay(1)
LcdApi.__init__(self, num_lines, num_columns)
cmd = self.LCD_FUNCTION
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
def __init__(self, i2c, i2c_addr, num_lines, num_columns):
self.i2c = i2c
self.i2c_addr = i2c_addr
self.i2c.writeto(self.i2c_addr, bytes([0]))
sleep_ms(20) # Allow LCD time to powerup
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
sleep_ms(5) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
sleep_ms(1)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
sleep_ms(1)
# Put LCD into 4 bit mode
self.hal_write_init_nibble(self.LCD_FUNCTION)
sleep_ms(1)
LcdApi.__init__(self, num_lines, num_columns)
cmd = self.LCD_FUNCTION
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
def __init__(self, port, i2c_addr, num_lines, num_columns):
self.port = port
self.i2c_addr = i2c_addr
self.bus = smbus.SMBus(port)
self.bus.write_byte(self.i2c_addr, 0)
time.sleep(0.020) # Allow LCD time to powerup
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
time.sleep(0.005) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
time.sleep(0.001)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
time.sleep(0.001)
# Put LCD into 4 bit mode
self.hal_write_init_nibble(self.LCD_FUNCTION)
time.sleep(0.001)
LcdApi.__init__(self, num_lines, num_columns)
cmd = self.LCD_FUNCTION
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
def __init__(self, port, i2c_addr, num_lines, num_columns):
self.port = port
self.i2c_addr = i2c_addr
self.bus = smbus.SMBus(port)
self.bus.write_byte(self.i2c_addr, 0)
time.sleep(0.020) # Allow LCD time to powerup
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
time.sleep(0.005) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
time.sleep(0.001)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
time.sleep(0.001)
# Put LCD into 4 bit mode
self.hal_write_init_nibble(self.LCD_FUNCTION)
time.sleep(0.001)
LcdApi.__init__(self, num_lines, num_columns)
cmd = self.LCD_FUNCTION
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
def __init__(self, rs_pin, enable_pin, d0_pin=None, d1_pin=None,
d2_pin=None, d3_pin=None, d4_pin=None, d5_pin=None,
d6_pin=None, d7_pin=None, rw_pin=None, backlight_pin=None,
num_lines=2, num_columns=16):
"""Constructs the GpioLcd object. All of the arguments must pyb.Pin
objects which ddescribe which pin the given line from the LCD is
connected to.
When used in 4-bit mode, only D4, D5, D6, and D7 are physically
connected to the LCD panel. This function allows you call it like
GpioLcd(rs, enable, D4, D5, D6, D7) and it will interpret that as
if you had actually called:
GpioLcd(rs, enable, d4=D4, d5=D5, d6=D6, d7=D7)
The enable 8-bit mode, you need pass d0 thru d7.
The rw pin isn't used by this library, but if you specify it, then
it will be set low.
"""
self.rs_pin = rs_pin
self.enable_pin = enable_pin
self.rw_pin = rw_pin
self.backlight_pin = backlight_pin
self._4bit = True
if d4_pin and d5_pin and d6_pin and d7_pin:
self.d0_pin = d0_pin
self.d1_pin = d1_pin
self.d2_pin = d2_pin
self.d3_pin = d3_pin
self.d4_pin = d4_pin
self.d5_pin = d5_pin
self.d6_pin = d6_pin
self.d7_pin = d7_pin
if self.d0_pin and self.d1_pin and self.d2_pin and self.d3_pin:
self._4bit = False
else:
# This is really 4-bit mode, and the 4 data pins were just
# passed as the first 4 arguments, so we switch things around.
self.d0_pin = None
self.d1_pin = None
self.d2_pin = None
self.d3_pin = None
self.d4_pin = d0_pin
self.d5_pin = d1_pin
self.d6_pin = d2_pin
self.d7_pin = d3_pin
self.rs_pin.init(Pin.OUT_PP)
self.rs_pin.low()
if self.rw_pin:
self.rw_pin.init(Pin.OUT_PP)
self.rw_pin.low()
self.enable_pin.init(Pin.OUT_PP)
self.enable_pin.low()
self.d4_pin.init(Pin.OUT_PP)
self.d5_pin.init(Pin.OUT_PP)
self.d6_pin.init(Pin.OUT_PP)
self.d7_pin.init(Pin.OUT_PP)
self.d4_pin.low()
self.d5_pin.low()
self.d6_pin.low()
self.d7_pin.low()
if not self._4bit:
self.d0_pin.init(Pin.OUT_PP)
self.d1_pin.init(Pin.OUT_PP)
self.d2_pin.init(Pin.OUT_PP)
self.d3_pin.init(Pin.OUT_PP)
self.d0_pin.low()
self.d1_pin.low()
self.d2_pin.low()
self.d3_pin.low()
if self.backlight_pin is not None:
self.backlight_pin.init(Pin.OUT_PP)
self.backlight_pin.low()
# See about splitting this into begin
delay(20) # Allow LCD time to powerup
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(5) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
cmd = self.LCD_FUNCTION
if not self._4bit:
cmd |= self.LCD_FUNCTION_8BIT
self.hal_write_init_nibble(cmd)
delay(1)
LcdApi.__init__(self, num_lines, num_columns)
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
def __init__(self, num_lines=2, num_columns=16):
LcdApi.__init__(self, num_lines, num_columns)
self.reset()
self.num_lines = num_lines
self.num_columns = num_columns
def __init__(self,
rs_pin,
enable_pin,
d0_pin=None,
d1_pin=None,
d2_pin=None,
d3_pin=None,
d4_pin=None,
d5_pin=None,
d6_pin=None,
d7_pin=None,
rw_pin=None,
backlight_pin=None,
num_lines=2,
num_columns=16):
"""Constructs the GpioLcd object. All of the arguments must pyb.Pin
objects which ddescribe which pin the given line from the LCD is
connected to.
When used in 4-bit mode, only D4, D5, D6, and D7 are physically
connected to the LCD panel. This function allows you call it like
GpioLcd(rs, enable, D4, D5, D6, D7) and it will interpret that as
if you had actually called:
GpioLcd(rs, enable, d4=D4, d5=D5, d6=D6, d7=D7)
The enable 8-bit mode, you need pass d0 thru d7.
The rw pin isn't used by this library, but if you specify it, then
it will be set low.
"""
self.rs_pin = rs_pin
self.enable_pin = enable_pin
self.rw_pin = rw_pin
self.backlight_pin = backlight_pin
self._4bit = True
if d4_pin and d5_pin and d6_pin and d7_pin:
self.d0_pin = d0_pin
self.d1_pin = d1_pin
self.d2_pin = d2_pin
self.d3_pin = d3_pin
self.d4_pin = d4_pin
self.d5_pin = d5_pin
self.d6_pin = d6_pin
self.d7_pin = d7_pin
if self.d0_pin and self.d1_pin and self.d2_pin and self.d3_pin:
self._4bit = False
else:
# This is really 4-bit mode, and the 4 data pins were just
# passed as the first 4 arguments, so we switch things around.
self.d0_pin = None
self.d1_pin = None
self.d2_pin = None
self.d3_pin = None
self.d4_pin = d0_pin
self.d5_pin = d1_pin
self.d6_pin = d2_pin
self.d7_pin = d3_pin
self.rs_pin.init(Pin.OUT_PP)
self.rs_pin.low()
if self.rw_pin:
self.rw_pin.init(Pin.OUT_PP)
self.rw_pin.low()
self.enable_pin.init(Pin.OUT_PP)
self.enable_pin.low()
self.d4_pin.init(Pin.OUT_PP)
self.d5_pin.init(Pin.OUT_PP)
self.d6_pin.init(Pin.OUT_PP)
self.d7_pin.init(Pin.OUT_PP)
self.d4_pin.low()
self.d5_pin.low()
self.d6_pin.low()
self.d7_pin.low()
if not self._4bit:
self.d0_pin.init(Pin.OUT_PP)
self.d1_pin.init(Pin.OUT_PP)
self.d2_pin.init(Pin.OUT_PP)
self.d3_pin.init(Pin.OUT_PP)
self.d0_pin.low()
self.d1_pin.low()
self.d2_pin.low()
self.d3_pin.low()
if self.backlight_pin is not None:
self.backlight_pin.init(Pin.OUT_PP)
self.backlight_pin.low()
# See about splitting this into begin
delay(20) # Allow LCD time to powerup
# Send reset 3 times
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(5) # need to delay at least 4.1 msec
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
delay(1)
cmd = self.LCD_FUNCTION
if not self._4bit:
cmd |= self.LCD_FUNCTION_8BIT
self.hal_write_init_nibble(cmd)
delay(1)
LcdApi.__init__(self, num_lines, num_columns)
if num_lines > 1:
cmd |= self.LCD_FUNCTION_2LINES
self.hal_write_command(cmd)
