Python board.SDA属性代码示例

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def clear(self):
        """Clears everything displayed on the LCD.

        The following example displays, "Hello, world!", then clears the LCD.

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.message = "Hello, world!"
            time.sleep(5)
            lcd.clear()
        """
        self._write8(_LCD_CLEARDISPLAY)
        time.sleep(0.003) 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def cursor(self):
        """True if cursor is visible. False to stop displaying the cursor.

        The following example shows the cursor after a displayed message:

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.cursor = True
            lcd.message = "Cursor! "
            time.sleep(5)

        """
        return self.displaycontrol & _LCD_CURSORON == _LCD_CURSORON 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def blink(self):
        """
        Blink the cursor. True to blink the cursor. False to stop blinking.

        The following example shows a message followed by a blinking cursor for five seconds.

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.blink = True
            lcd.message = "Blinky cursor!"
            time.sleep(5)
            lcd.blink = False
        """
        return self.displaycontrol & _LCD_BLINKON == _LCD_BLINKON 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def display(self):
        """
        Enable or disable the display. True to enable the display. False to disable the display.

        The following example displays, "Hello, world!" on the LCD and then turns the display off.

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.message = "Hello, world!"
            time.sleep(5)
            lcd.display = False
        """
        return self.displaycontrol & _LCD_DISPLAYON == _LCD_DISPLAYON 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def message(self):
        """Display a string of text on the character LCD.
        Start position is (0,0) if cursor_position is not set.
        If cursor_position is set, message starts at the set
        position from the left for left to right text and from
        the right for right to left text. Resets cursor column
        and row to (0,0) after displaying the message.

        The following example displays, "Hello, world!" on the LCD.

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.message = "Hello, world!"
            time.sleep(5)
        """
        return self._message 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def move_right(self):
        """Moves displayed text right one column.

        The following example scrolls a message to the right off the screen.

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            scroll_message = "Scroll -->"
            lcd.message = scroll_message
            time.sleep(2)
            for i in range(len(scroll_message) + 16):
                lcd.move_right()
                time.sleep(0.5)
        """
        self._write8(_LCD_CURSORSHIFT | _LCD_DISPLAYMOVE | _LCD_MOVERIGHT) 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def text_direction(self):
        """The direction the text is displayed. To display the text left to right beginning on the
        left side of the LCD, set ``text_direction = LEFT_TO_RIGHT``. To display the text right
        to left beginning on the right size of the LCD, set ``text_direction = RIGHT_TO_LEFT``.
        Text defaults to displaying from left to right.

        The following example displays "Hello, world!" from right to left.

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.text_direction = lcd.RIGHT_TO_LEFT
            lcd.message = "Hello, world!"
            time.sleep(5)
        """
        return self._direction 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def left_button(self):
        """The left button on the RGB Character LCD I2C Shield or Pi plate.

        The following example prints "Left!" to the LCD when the left button is pressed:

        .. code-block:: python

            import board
            import busio
            from adafruit_character_lcd.character_lcd_rgb_i2c import Character_LCD_RGB_I2C

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = Character_LCD_RGB_I2C(i2c, 16, 2)

            while True:
                if lcd.left_button:
                    lcd.message = "Left!"

        """
        return not self._left_button.value 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def down_button(self):
        """The down button on the RGB Character LCD I2C Shield or Pi plate.

        The following example prints "Down!" to the LCD when the down button is pressed:

        .. code-block:: python

            import board
            import busio
            from adafruit_character_lcd.character_lcd_rgb_i2c import Character_LCD_RGB_I2C

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = Character_LCD_RGB_I2C(i2c, 16, 2)

            while True:
                if lcd.down_button:
                    lcd.message = "Down!"

        """
        return not self._down_button.value 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def right_button(self):
        """The right button on the RGB Character LCD I2C Shield or Pi plate.

        The following example prints "Right!" to the LCD when the right button is pressed:

        .. code-block:: python

            import board
            import busio
            from adafruit_character_lcd.character_lcd_rgb_i2c import Character_LCD_RGB_I2C

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = Character_LCD_RGB_I2C(i2c, 16, 2)

            while True:
                if lcd.right_button:
                    lcd.message = "Right!"

        """
        return not self._right_button.value 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def select_button(self):
        """The select button on the RGB Character LCD I2C Shield or Pi plate.

        The following example prints "Select!" to the LCD when the select button is pressed:

        .. code-block:: python

            import board
            import busio
            from adafruit_character_lcd.character_lcd_rgb_i2c import Character_LCD_RGB_I2C

            i2c = busio.I2C(board.SCL, board.SDA)
            lcd = Character_LCD_RGB_I2C(i2c, 16, 2)

            while True:
                if lcd.select_button:
                    lcd.message = "Select!"

        """
        return not self._select_button.value 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def test_read_value(self):
        """
        Access all sensor values as per
        https://github.com/adafruit/Adafruit_CircuitPython_BNO055/blob/bdf6ada21e7552c242bc470d4d2619b480b4c574/examples/values.py
        Note I have not successfully run this test. Possibly a hardware issue with module I have.
        See https://forums.adafruit.com/viewtopic.php?f=60&t=131665
        """
        import board

        gc.collect()
        import adafruit_bno055

        gc.collect()
        i2c = I2C(board.SCL, board.SDA)
        sensor = adafruit_bno055.BNO055(i2c)

        self.assertTrue(9 <= sensor.gravity <= 11)
        self.assertTrue(sensor.temperature != 0)
        self.assertTrue(sensor.acceleration != (0, 0, 0))
        self.assertTrue(sensor.magnetometer != (0, 0, 0))
        self.assertTrue(sensor.gyroscope != (0, 0, 0))
        self.assertTrue(sensor.quaternion != (0, 0, 0, 0))
        sensor.euler
        sensor.linear_acceleration 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def read_sensor(sensor):
    try:
        i2c = busio.I2C(board.SCL, board.SDA)
        sensor = adafruit_si7021.SI7021(i2c)
        temperature = sensor.temperature
        humidity = sensor.relative_humidity
        if humidity == None or temperature == None or humidity > 101:
            print("--problem reading sensor on GPIO:"+sensor_gpio+"--")
            return '-1','-1','-1'
        else:
            humidity = round(humidity,2)
            temperature = round(temperature, 2)
            logtime = datetime.datetime.now()
            return humidity, temperature, logtime
    except:
        print("--problem reading si7021")
        return '-1','-1','-1' 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def backlight(self):
        """Enable or disable backlight. True if backlight is on. False if backlight is off.

        The following example turns the backlight off, then displays, "Hello, world?", then turns
        the backlight on and displays, "Hello, world!"

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)

            lcd = character_lcd.Character_LCD_I2C(i2c, 16, 2)

            lcd.backlight = False
            lcd.message = "Hello, world?"
            time.sleep(5)
            lcd.backlight = True
            lcd.message = "Hello, world!"
            time.sleep(5)

        """
        return self._enable 

# 需要导入模块: import board [as 别名]
# 或者: from board import SDA [as 别名]
def color(self):
        """
        The color of the display. Provide a list of three integers ranging 0 - 100, ``[R, G, B]``.
        ``0`` is no color, or "off". ``100`` is maximum color. For example, the brightest red would
        be ``[100, 0, 0]``, and a half-bright purple would be, ``[50, 0, 50]``.

        If PWM is unavailable, ``0`` is off, and non-zero is on. For example, ``[1, 0, 0]`` would
        be red.

        The following example turns the LCD red and displays, "Hello, world!".

        .. code-block:: python

            import time
            import board
            import busio
            import adafruit_character_lcd.character_lcd_rgb_i2c as character_lcd

            i2c = busio.I2C(board.SCL, board.SDA)

            lcd = character_lcd.Character_LCD_RGB_I2C(i2c, 16, 2)

            lcd.color = [100, 0, 0]
            lcd.message = "Hello, world!"
            time.sleep(5)
        """
        return self._color