kopia lustrzana https://github.com/micropython/micropython
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395 wiersze
15 KiB
ReStructuredText
:mod:`lcd160cr` --- control of LCD160CR display
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===============================================
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.. module:: lcd160cr
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:synopsis: control of LCD160CR display
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This module provides control of the MicroPython LCD160CR display.
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.. image:: http://micropython.org/resources/LCD160CRv10-persp.jpg
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:alt: LCD160CRv1.0 picture
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:width: 640px
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Further resources are available via the following links:
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* `LCD160CRv1.0 reference manual <http://micropython.org/resources/LCD160CRv10-refmanual.pdf>`_ (100KiB PDF)
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* `LCD160CRv1.0 schematics <http://micropython.org/resources/LCD160CRv10-schematics.pdf>`_ (1.6MiB PDF)
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class LCD160CR
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--------------
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The LCD160CR class provides an interface to the display. Create an
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instance of this class and use its methods to draw to the LCD and get
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the status of the touch panel.
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For example::
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import lcd160cr
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lcd = lcd160cr.LCD160CR('X')
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lcd.set_orient(lcd160cr.PORTRAIT)
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lcd.set_pos(0, 0)
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lcd.set_text_color(lcd.rgb(255, 0, 0), lcd.rgb(0, 0, 0))
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lcd.set_font(1)
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lcd.write('Hello MicroPython!')
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print('touch:', lcd.get_touch())
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Constructors
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------------
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.. class:: LCD160CR(connect=None, \*, pwr=None, i2c=None, spi=None, i2c_addr=98)
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Construct an LCD160CR object. The parameters are:
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- *connect* is a string specifying the physical connection of the LCD
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display to the board; valid values are "X", "Y", "XY", "YX".
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Use "X" when the display is connected to a pyboard in the X-skin
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position, and "Y" when connected in the Y-skin position. "XY"
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and "YX" are used when the display is connected to the right or
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left side of the pyboard, respectively.
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- *pwr* is a Pin object connected to the LCD's power/enabled pin.
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- *i2c* is an I2C object connected to the LCD's I2C interface.
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- *spi* is an SPI object connected to the LCD's SPI interface.
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- *i2c_addr* is the I2C address of the display.
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One must specify either a valid *connect* or all of *pwr*, *i2c* and *spi*.
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If a valid *connect* is given then any of *pwr*, *i2c* or *spi* which are
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not passed as parameters (i.e. they are ``None``) will be created based on the
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value of *connect*. This allows to override the default interface to the
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display if needed.
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The default values are:
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- "X" is for the X-skin and uses:
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``pwr=Pin("X4")``, ``i2c=I2C("X")``, ``spi=SPI("X")``
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- "Y" is for the Y-skin and uses:
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``pwr=Pin("Y4")``, ``i2c=I2C("Y")``, ``spi=SPI("Y")``
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- "XY" is for the right-side and uses:
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``pwr=Pin("X4")``, ``i2c=I2C("Y")``, ``spi=SPI("X")``
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- "YX" is for the left-side and uses:
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``pwr=Pin("Y4")``, ``i2c=I2C("X")``, ``spi=SPI("Y")``
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See `this image <http://micropython.org/resources/LCD160CRv10-positions.jpg>`_
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for how the display can be connected to the pyboard.
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Static methods
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--------------
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.. staticmethod:: LCD160CR.rgb(r, g, b)
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Return a 16-bit integer representing the given rgb color values. The
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16-bit value can be used to set the font color (see
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:meth:`LCD160CR.set_text_color`) pen color (see :meth:`LCD160CR.set_pen`)
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and draw individual pixels.
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.. staticmethod:: LCD160CR.clip_line(data, w, h):
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Clip the given line data. This is for internal use.
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Instance members
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----------------
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The following instance members are publicly accessible.
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.. data:: LCD160CR.w
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.. data:: LCD160CR.h
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The width and height of the display, respectively, in pixels. These
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members are updated when calling :meth:`LCD160CR.set_orient` and should
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be considered read-only.
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Setup commands
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--------------
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.. method:: LCD160CR.set_power(on)
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Turn the display on or off, depending on the given value of *on*: 0 or ``False``
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will turn the display off, and 1 or ``True`` will turn it on.
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.. method:: LCD160CR.set_orient(orient)
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Set the orientation of the display. The *orient* parameter can be one
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of `PORTRAIT`, `LANDSCAPE`, `PORTRAIT_UPSIDEDOWN`, `LANDSCAPE_UPSIDEDOWN`.
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.. method:: LCD160CR.set_brightness(value)
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Set the brightness of the display, between 0 and 31.
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.. method:: LCD160CR.set_i2c_addr(addr)
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Set the I2C address of the display. The *addr* value must have the
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lower 2 bits cleared.
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.. method:: LCD160CR.set_uart_baudrate(baudrate)
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Set the baudrate of the UART interface.
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.. method:: LCD160CR.set_startup_deco(value)
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Set the start-up decoration of the display. The *value* parameter can be a
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logical or of `STARTUP_DECO_NONE`, `STARTUP_DECO_MLOGO`, `STARTUP_DECO_INFO`.
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.. method:: LCD160CR.save_to_flash()
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Save the following parameters to flash so they persist on restart and power up:
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initial decoration, orientation, brightness, UART baud rate, I2C address.
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Pixel access methods
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--------------------
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The following methods manipulate individual pixels on the display.
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.. method:: LCD160CR.set_pixel(x, y, c)
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Set the specified pixel to the given color. The color should be a 16-bit
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integer and can be created by :meth:`LCD160CR.rgb`.
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.. method:: LCD160CR.get_pixel(x, y)
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Get the 16-bit value of the specified pixel.
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.. method:: LCD160CR.get_line(x, y, buf)
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Low-level method to get a line of pixels into the given buffer.
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To read *n* pixels *buf* should be *2*n+1* bytes in length. The first byte
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is a dummy byte and should be ignored, and subsequent bytes represent the
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pixels in the line starting at coordinate *(x, y)*.
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.. method:: LCD160CR.screen_dump(buf, x=0, y=0, w=None, h=None)
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Dump the contents of the screen to the given buffer. The parameters *x* and *y*
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specify the starting coordinate, and *w* and *h* the size of the region. If *w*
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or *h* are ``None`` then they will take on their maximum values, set by the size
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of the screen minus the given *x* and *y* values. *buf* should be large enough
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to hold ``2*w*h`` bytes. If it's smaller then only the initial horizontal lines
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will be stored.
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.. method:: LCD160CR.screen_load(buf)
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Load the entire screen from the given buffer.
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Drawing text
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------------
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To draw text one sets the position, color and font, and then uses
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`LCD160CR.write` to draw the text.
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.. method:: LCD160CR.set_pos(x, y)
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Set the position for text output using :meth:`LCD160CR.write`. The position
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is the upper-left corner of the text.
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.. method:: LCD160CR.set_text_color(fg, bg)
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Set the foreground and background color of the text.
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.. method:: LCD160CR.set_font(font, scale=0, bold=0, trans=0, scroll=0)
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Set the font for the text. Subsequent calls to `write` will use the newly
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configured font. The parameters are:
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- *font* is the font family to use, valid values are 0, 1, 2, 3.
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- *scale* is a scaling value for each character pixel, where the pixels
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are drawn as a square with side length equal to *scale + 1*. The value
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can be between 0 and 63.
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- *bold* controls the number of pixels to overdraw each character pixel,
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making a bold effect. The lower 2 bits of *bold* are the number of
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pixels to overdraw in the horizontal direction, and the next 2 bits are
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for the vertical direction. For example, a *bold* value of 5 will
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overdraw 1 pixel in both the horizontal and vertical directions.
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- *trans* can be either 0 or 1 and if set to 1 the characters will be
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drawn with a transparent background.
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- *scroll* can be either 0 or 1 and if set to 1 the display will do a
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soft scroll if the text moves to the next line.
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.. method:: LCD160CR.write(s)
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Write text to the display, using the current position, color and font.
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As text is written the position is automatically incremented. The
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display supports basic VT100 control codes such as newline and backspace.
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Drawing primitive shapes
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------------------------
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Primitive drawing commands use a foreground and background color set by the
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`set_pen` method.
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.. method:: LCD160CR.set_pen(line, fill)
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Set the line and fill color for primitive shapes.
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.. method:: LCD160CR.erase()
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Erase the entire display to the pen fill color.
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.. method:: LCD160CR.dot(x, y)
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Draw a single pixel at the given location using the pen line color.
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.. method:: LCD160CR.rect(x, y, w, h)
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.. method:: LCD160CR.rect_outline(x, y, w, h)
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.. method:: LCD160CR.rect_interior(x, y, w, h)
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Draw a rectangle at the given location and size using the pen line
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color for the outline, and the pen fill color for the interior.
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The `rect` method draws the outline and interior, while the other methods
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just draw one or the other.
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.. method:: LCD160CR.line(x1, y1, x2, y2)
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Draw a line between the given coordinates using the pen line color.
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.. method:: LCD160CR.dot_no_clip(x, y)
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.. method:: LCD160CR.rect_no_clip(x, y, w, h)
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.. method:: LCD160CR.rect_outline_no_clip(x, y, w, h)
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.. method:: LCD160CR.rect_interior_no_clip(x, y, w, h)
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.. method:: LCD160CR.line_no_clip(x1, y1, x2, y2)
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These methods are as above but don't do any clipping on the input
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coordinates. They are faster than the clipping versions and can be
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used when you know that the coordinates are within the display.
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.. method:: LCD160CR.poly_dot(data)
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Draw a sequence of dots using the pen line color.
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The *data* should be a buffer of bytes, with each successive pair of
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bytes corresponding to coordinate pairs (x, y).
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.. method:: LCD160CR.poly_line(data)
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Similar to :meth:`LCD160CR.poly_dot` but draws lines between the dots.
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Touch screen methods
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--------------------
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.. method:: LCD160CR.touch_config(calib=False, save=False, irq=None)
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Configure the touch panel:
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- If *calib* is ``True`` then the call will trigger a touch calibration of
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the resistive touch sensor. This requires the user to touch various
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parts of the screen.
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- If *save* is ``True`` then the touch parameters will be saved to NVRAM
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to persist across reset/power up.
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- If *irq* is ``True`` then the display will be configured to pull the IRQ
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line low when a touch force is detected. If *irq* is ``False`` then this
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feature is disabled. If *irq* is ``None`` (the default value) then no
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change is made to this setting.
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.. method:: LCD160CR.is_touched()
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Returns a boolean: ``True`` if there is currently a touch force on the screen,
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``False`` otherwise.
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.. method:: LCD160CR.get_touch()
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Returns a 3-tuple of: *(active, x, y)*. If there is currently a touch force
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on the screen then *active* is 1, otherwise it is 0. The *x* and *y* values
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indicate the position of the current or most recent touch.
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Advanced commands
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-----------------
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.. method:: LCD160CR.set_spi_win(x, y, w, h)
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Set the window that SPI data is written to.
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.. method:: LCD160CR.fast_spi(flush=True)
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Ready the display to accept RGB pixel data on the SPI bus, resetting the location
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of the first byte to go to the top-left corner of the window set by
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:meth:`LCD160CR.set_spi_win`.
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The method returns an SPI object which can be used to write the pixel data.
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Pixels should be sent as 16-bit RGB values in the 5-6-5 format. The destination
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counter will increase as data is sent, and data can be sent in arbitrary sized
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chunks. Once the destination counter reaches the end of the window specified by
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:meth:`LCD160CR.set_spi_win` it will wrap around to the top-left corner of that window.
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.. method:: LCD160CR.show_framebuf(buf)
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Show the given buffer on the display. *buf* should be an array of bytes containing
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the 16-bit RGB values for the pixels, and they will be written to the area
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specified by :meth:`LCD160CR.set_spi_win`, starting from the top-left corner.
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The `framebuf <framebuf.html>`_ module can be used to construct frame buffers
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and provides drawing primitives. Using a frame buffer will improve
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performance of animations when compared to drawing directly to the screen.
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.. method:: LCD160CR.set_scroll(on)
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Turn scrolling on or off. This controls globally whether any window regions will
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scroll.
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.. method:: LCD160CR.set_scroll_win(win, x=-1, y=0, w=0, h=0, vec=0, pat=0, fill=0x07e0, color=0)
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Configure a window region for scrolling:
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- *win* is the window id to configure. There are 0..7 standard windows for
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general purpose use. Window 8 is the text scroll window (the ticker).
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- *x*, *y*, *w*, *h* specify the location of the window in the display.
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- *vec* specifies the direction and speed of scroll: it is a 16-bit value
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of the form ``0bF.ddSSSSSSSSSSSS``. *dd* is 0, 1, 2, 3 for +x, +y, -x,
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-y scrolling. *F* sets the speed format, with 0 meaning that the window
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is shifted *S % 256* pixel every frame, and 1 meaning that the window
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is shifted 1 pixel every *S* frames.
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- *pat* is a 16-bit pattern mask for the background.
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- *fill* is the fill color.
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- *color* is the extra color, either of the text or pattern foreground.
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.. method:: LCD160CR.set_scroll_win_param(win, param, value)
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Set a single parameter of a scrolling window region:
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- *win* is the window id, 0..8.
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- *param* is the parameter number to configure, 0..7, and corresponds
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to the parameters in the `set_scroll_win` method.
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- *value* is the value to set.
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.. method:: LCD160CR.set_scroll_buf(s)
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Set the string for scrolling in window 8. The parameter *s* must be a string
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with length 32 or less.
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.. method:: LCD160CR.jpeg(buf)
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Display a JPEG. *buf* should contain the entire JPEG data. JPEG data should
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not include EXIF information. The following encodings are supported: Baseline
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DCT, Huffman coding, 8 bits per sample, 3 color components, YCbCr4:2:2.
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The origin of the JPEG is set by :meth:`LCD160CR.set_pos`.
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.. method:: LCD160CR.jpeg_start(total_len)
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.. method:: LCD160CR.jpeg_data(buf)
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Display a JPEG with the data split across multiple buffers. There must be
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a single call to `jpeg_start` to begin with, specifying the total number of
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bytes in the JPEG. Then this number of bytes must be transferred to the
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display using one or more calls to the `jpeg_data` command.
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.. method:: LCD160CR.feed_wdt()
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The first call to this method will start the display's internal watchdog
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timer. Subsequent calls will feed the watchdog. The timeout is roughly 30
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seconds.
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.. method:: LCD160CR.reset()
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Reset the display.
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Constants
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---------
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.. data:: lcd160cr.PORTRAIT
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lcd160cr.LANDSCAPE
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lcd160cr.PORTRAIT_UPSIDEDOWN
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lcd160cr.LANDSCAPE_UPSIDEDOWN
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Orientations of the display, used by :meth:`LCD160CR.set_orient`.
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.. data:: lcd160cr.STARTUP_DECO_NONE
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lcd160cr.STARTUP_DECO_MLOGO
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lcd160cr.STARTUP_DECO_INFO
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Types of start-up decoration, can be OR'ed together, used by
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:meth:`LCD160CR.set_startup_deco`.
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