95 lines
2.7 KiB
ReStructuredText
95 lines
2.7 KiB
ReStructuredText
|
class LCD --- LCD control for the LCD touch-sensor pyskin
|
||
|
|
=========================================================
|
||
|
|
|
||
|
|
The LCD class is used to control the LCD on the LCD touch-sensor pyskin,
|
||
|
|
LCD32MKv1.0. The LCD is a 128x32 pixel monochrome screen, part NHD-C12832A1Z.
|
||
|
|
|
||
|
|
The pyskin must be connected in either the X or Y positions, and then
|
||
|
|
an LCD object is made using::
|
||
|
|
|
||
|
|
lcd = pyb.LCD('X') # if pyskin is in the X position
|
||
|
|
lcd = pyb.LCD('Y') # if pyskin is in the Y position
|
||
|
|
|
||
|
|
Then you can use::
|
||
|
|
|
||
|
|
lcd.light(True) # turn the backlight on
|
||
|
|
lcd.write('Hello world!\n') # print text to the screen
|
||
|
|
|
||
|
|
This driver implements a double buffer for setting/getting pixels.
|
||
|
|
For example, to make a bouncing dot, try::
|
||
|
|
|
||
|
|
x = y = 0
|
||
|
|
dx = dy = 1
|
||
|
|
while True:
|
||
|
|
# update the dot's position
|
||
|
|
x += dx
|
||
|
|
y += dy
|
||
|
|
|
||
|
|
# make the dot bounce of the edges of the screen
|
||
|
|
if x <= 0 or x >= 127: dx = -dx
|
||
|
|
if y <= 0 or y >= 31: dy = -dy
|
||
|
|
|
||
|
|
lcd.fill(0) # clear the buffer
|
||
|
|
lcd.pixel(x, y, 1) # draw the dot
|
||
|
|
lcd.show() # show the buffer
|
||
|
|
pyb.delay(50) # pause for 50ms
|
||
|
|
|
||
|
|
|
||
|
|
Constructors
|
||
|
|
------------
|
||
|
|
|
||
|
|
.. class:: pyb.LCD(skin_position)
|
||
|
|
|
||
|
|
Construct an LCD object in the given skin position. ``skin_position`` can be 'X' or 'Y', and
|
||
|
|
should match the position where the LCD pyskin is plugged in.
|
||
|
|
|
||
|
|
|
||
|
|
Methods
|
||
|
|
-------
|
||
|
|
|
||
|
|
.. method:: lcd.command(instr_data, buf)
|
||
|
|
|
||
|
|
Send an arbitrary command to the LCD. Pass 0 for ``instr_data`` to send an
|
||
|
|
instruction, otherwise pass 1 to send data. ``buf`` is a buffer with the
|
||
|
|
instructions/data to send.
|
||
|
|
|
||
|
|
.. method:: lcd.contrast(value)
|
||
|
|
|
||
|
|
Set the contrast of the LCD. Valid values are between 0 and 47.
|
||
|
|
|
||
|
|
.. method:: lcd.fill(colour)
|
||
|
|
|
||
|
|
Fill the screen with the given colour (0 or 1 for white or black).
|
||
|
|
|
||
|
|
This method writes to the hidden buffer. Use ``show()`` to show the buffer.
|
||
|
|
|
||
|
|
.. method:: lcd.get(x, y)
|
||
|
|
|
||
|
|
Get the pixel at the position ``(x, y)``. Returns 0 or 1.
|
||
|
|
|
||
|
|
This method reads from the visible buffer.
|
||
|
|
|
||
|
|
.. method:: lcd.light(value)
|
||
|
|
|
||
|
|
Turn the backlight on/off. True or 1 turns it on, False or 0 turns it off.
|
||
|
|
|
||
|
|
.. method:: lcd.pixel(x, y, colour)
|
||
|
|
|
||
|
|
Set the pixel at ``(x, y)`` to the given colour (0 or 1).
|
||
|
|
|
||
|
|
This method writes to the hidden buffer. Use ``show()`` to show the buffer.
|
||
|
|
|
||
|
|
.. method:: lcd.show()
|
||
|
|
|
||
|
|
Show the hidden buffer on the screen.
|
||
|
|
|
||
|
|
.. method:: lcd.text(str, x, y, colour)
|
||
|
|
|
||
|
|
Draw the given text to the position ``(x, y)`` using the given colour (0 or 1).
|
||
|
|
|
||
|
|
This method writes to the hidden buffer. Use ``show()`` to show the buffer.
|
||
|
|
|
||
|
|
.. method:: lcd.write(str)
|
||
|
|
|
||
|
|
Write the string ``str`` to the screen. It will appear immediately.
|