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前言
micropython使用framebuf库来实现中文展示
提示:以下是本篇文章正文内容,下面案例可供参考
一、hzk字库
不过多叙述,自行查找
资源的话,可以上网找,一找一大把
二、使用步骤
1.引入相应的驱动
可以使用墨水屏、oled,原则上,使用framebuf这个的都可以
使用的是CircuitPython下的framebuf库,可以旋转,比较方便
cframebuf库如下
cframebuf.py
// An highlighted block
# SPDX-FileCopyrightText: <text> 2018 Kattni Rembor, Melissa LeBlanc-Williams
# and Tony DiCola, for Adafruit Industries.
# Original file created by Damien P. George </text>
#
# SPDX-License-Identifier: MIT
"""
`adafruit_framebuf`
====================================================
CircuitPython pure-python framebuf module, based on the micropython framebuf module.
Implementation Notes
--------------------
**Hardware:**
* `Adafruit SSD1306 OLED displays <https://www.adafruit.com/?q=ssd1306>`_
**Software and Dependencies:**
* Adafruit CircuitPython firmware for the supported boards:
https://github.com/adafruit/circuitpython/releases
"""
__version__ = "0.0.0-auto.0"
__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_framebuf.git"
import os
import struct
# Framebuf format constants:
MVLSB = 0 # Single bit displays (like SSD1306 OLED)
RGB565 = 1 # 16-bit color displays
GS4_HMSB = 2 # Unimplemented!
MHMSB = 3 # Single bit displays like the Sharp Memory
RGB888 = 4 # Neopixels and Dotstars
class MHMSBFormat:
"""MHMSBFormat"""
@staticmethod
def set_pixel(framebuf, x, y, color):
"""Set a given pixel to a color."""
index = (y * framebuf.stride + x) // 8
offset = 7 - x & 0x07
framebuf.buf[index] = (framebuf.buf[index] & ~(0x01 << offset)) | (
(color != 0) << offset
)
@staticmethod
def get_pixel(framebuf, x, y):
"""Get the color of a given pixel"""
index = (y * framebuf.stride + x) // 8
offset = 7 - x & 0x07
return (framebuf.buf[index] >> offset) & 0x01
@staticmethod
def fill(framebuf, color):
"""completely fill/clear the buffer with a color"""
if color:
fill = 0xFF
else:
fill = 0x00
for i in range(len(framebuf.buf)): # pylint: disable=consider-using-enumerate
framebuf.buf[i] = fill
@staticmethod
def fill_rect(framebuf, x, y, width, height, color):
"""Draw a rectangle at the given location, size and color. The ``fill_rect`` method draws
both the outline and interior."""
# pylint: disable=too-many-arguments
for _x in range(x, x + width):
offset = 7 - _x & 0x07
for _y in range(y, y + height):
index = (_y * framebuf.stride + _x) // 8
framebuf.buf[index] = (framebuf.buf[index] & ~(0x01 << offset)) | (
(color != 0) << offset
)
class MVLSBFormat:
"""MVLSBFormat"""
@staticmethod
def set_pixel(framebuf, x, y, color):
"""Set a given pixel to a color."""
index = (y >> 3) * framebuf.stride + x
offset = y & 0x07
framebuf.buf[index] = (framebuf.buf[index] & ~(0x01 << offset)) | (
(color != 0) << offset
)
@staticmethod
def get_pixel(framebuf, x, y):
"""Get the color of a given pixel"""
index = (y >> 3) * framebuf.stride + x
offset = y & 0x07
return (framebuf.buf[index] >> offset) & 0x01
@staticmethod
def fill(framebuf, color):
"""completely fill/clear the buffer with a color"""
if color:
fill = 0xFF
else:
fill = 0x00
for i in range(len(framebuf.buf)): # pylint: disable=consider-using-enumerate
framebuf.buf[i] = fill
@staticmethod
def fill_rect(framebuf, x, y, width, height, color):
"""Draw a rectangle at the given location, size and color. The ``fill_rect`` method draws
both the outline and interior."""
# pylint: disable=too-many-arguments
while height > 0:
index = (y >> 3) * framebuf.stride + x
offset = y & 0x07
for w_w in range(width):
framebuf.buf[index + w_w] = (
framebuf.buf[index + w_w] & ~(0x01 << offset)
) | ((color != 0) << offset)
y += 1
height -= 1
class RGB888Format:
"""RGB888Format"""
@staticmethod
def set_pixel(framebuf, x, y, color):
"""Set a given pixel to a color."""
index = (y * framebuf.stride + x) * 3
if isinstance(color, tuple):
framebuf.buf[index: index + 3] = bytes(color)
else:
framebuf.buf[index: index + 3] = bytes(
((color >> 16) & 255, (color >> 8) & 255, color & 255)
)
@staticmethod
def get_pixel(framebuf, x, y):
"""Get the color of a given pixel"""
index = (y * framebuf.stride + x) * 3
return (
(framebuf.buf[index] << 16)
| (framebuf.buf[index + 1] << 8)
| framebuf.buf[index + 2]
)
@staticmethod
def fill(framebuf, color):
"""completely fill/clear the buffer with a color"""
fill = (color >> 16) & 255, (color >> 8) & 255, color & 255
for i in range(0, len(framebuf.buf), 3):
framebuf.buf[i: i + 3] = bytes(fill)
@staticmethod
def fill_rect(framebuf, x, y, width, height, color):
"""Draw a rectangle at the given location, size and color. The ``fill_rect`` method draws
both the outline and interior."""
# pylint: disable=too-many-arguments
fill = (color >> 16) & 255, (color >> 8) & 255, color & 255
for _x in range(x, x + width):
for _y in range(y, y + height):
index = (_y * framebuf.stride + _x) * 3
framebuf.buf[index: index + 3] = bytes(fill)
class FrameBuffer:
"""FrameBuffer object.
:param buf: An object with a buffer protocol which must be large enough to contain every
pixel defined by the width, height and format of the FrameBuffer.
:param width: The width of the FrameBuffer in pixel
:param height: The height of the FrameBuffer in pixel
:param buf_format: Specifies the type of pixel used in the FrameBuffer; permissible values
are listed under Constants below. These set the number of bits used to
encode a color value and the layout of these bits in ``buf``. Where a
color value c is passed to a method, c is a small integer with an encoding
that is dependent on the format of the FrameBuffer.
:param stride: The number of pixels between each horizontal line of pixels in the
FrameBuffer. This defaults to ``width`` but may need adjustments when
implementing a FrameBuffer within another larger FrameBuffer or screen. The
``buf`` size must accommodate an increased step size.
"""
def __init__(self, buf, width, height, buf_format=MVLSB, stride=None):
# pylint: disable=too-many-arguments
self.buf = buf
self.width = width
self.height = height
self.stride = stride
self._font = None
if self.stride is None:
self.stride = width
if buf_format == MVLSB:
self.format = MVLSBFormat()
elif buf_format == MHMSB: