added ssd1306 display library
parent
88c6d94a78
commit
c00c001009
|
|
@ -0,0 +1,162 @@
|
|||
# MicroPython SSD1306 OLED driver, I2C and SPI interfaces
|
||||
from micropython import const
|
||||
import time
|
||||
import framebuf
|
||||
|
||||
|
||||
# register definitions
|
||||
SET_CONTRAST = const(0x81)
|
||||
SET_ENTIRE_ON = const(0xa4)
|
||||
SET_NORM_INV = const(0xa6)
|
||||
SET_DISP = const(0xae)
|
||||
SET_MEM_ADDR = const(0x20)
|
||||
SET_COL_ADDR = const(0x21)
|
||||
SET_PAGE_ADDR = const(0x22)
|
||||
SET_DISP_START_LINE = const(0x40)
|
||||
SET_SEG_REMAP = const(0xa0)
|
||||
SET_MUX_RATIO = const(0xa8)
|
||||
SET_COM_OUT_DIR = const(0xc0)
|
||||
SET_DISP_OFFSET = const(0xd3)
|
||||
SET_COM_PIN_CFG = const(0xda)
|
||||
SET_DISP_CLK_DIV = const(0xd5)
|
||||
SET_PRECHARGE = const(0xd9)
|
||||
SET_VCOM_DESEL = const(0xdb)
|
||||
SET_CHARGE_PUMP = const(0x8d)
|
||||
|
||||
|
||||
class SSD1306:
|
||||
def __init__(self, width, height, external_vcc):
|
||||
self.width = width
|
||||
self.height = height
|
||||
self.external_vcc = external_vcc
|
||||
self.pages = self.height // 8
|
||||
self.buffer = bytearray(self.pages * self.width)
|
||||
fb = framebuf.FrameBuffer(self.buffer, self.width, self.height, framebuf.MONO_VLSB)
|
||||
self.framebuf = fb
|
||||
# Provide methods for accessing FrameBuffer graphics primitives. This is a
|
||||
# workround because inheritance from a native class is currently unsupported.
|
||||
# http://docs.micropython.org/en/latest/pyboard/library/framebuf.html
|
||||
self.fill = fb.fill
|
||||
self.pixel = fb.pixel
|
||||
self.hline = fb.hline
|
||||
self.vline = fb.vline
|
||||
self.line = fb.line
|
||||
self.rect = fb.rect
|
||||
self.fill_rect = fb.fill_rect
|
||||
self.text = fb.text
|
||||
self.scroll = fb.scroll
|
||||
self.blit = fb.blit
|
||||
self.poweron()
|
||||
self.init_display()
|
||||
|
||||
def init_display(self):
|
||||
for cmd in (
|
||||
SET_DISP | 0x00, # off
|
||||
# address setting
|
||||
SET_MEM_ADDR, 0x00, # horizontal
|
||||
# resolution and layout
|
||||
SET_DISP_START_LINE | 0x00,
|
||||
SET_SEG_REMAP | 0x01, # column addr 127 mapped to SEG0
|
||||
SET_MUX_RATIO, self.height - 1,
|
||||
SET_COM_OUT_DIR | 0x08, # scan from COM[N] to COM0
|
||||
SET_DISP_OFFSET, 0x00,
|
||||
SET_COM_PIN_CFG, 0x02 if self.height == 32 else 0x12,
|
||||
# timing and driving scheme
|
||||
SET_DISP_CLK_DIV, 0x80,
|
||||
SET_PRECHARGE, 0x22 if self.external_vcc else 0xf1,
|
||||
SET_VCOM_DESEL, 0x30, # 0.83*Vcc
|
||||
# display
|
||||
SET_CONTRAST, 0xff, # maximum
|
||||
SET_ENTIRE_ON, # output follows RAM contents
|
||||
SET_NORM_INV, # not inverted
|
||||
# charge pump
|
||||
SET_CHARGE_PUMP, 0x10 if self.external_vcc else 0x14,
|
||||
SET_DISP | 0x01): # on
|
||||
self.write_cmd(cmd)
|
||||
self.fill(0)
|
||||
self.show()
|
||||
|
||||
def poweroff(self):
|
||||
self.write_cmd(SET_DISP | 0x00)
|
||||
|
||||
def contrast(self, contrast):
|
||||
self.write_cmd(SET_CONTRAST)
|
||||
self.write_cmd(contrast)
|
||||
|
||||
def invert(self, invert):
|
||||
self.write_cmd(SET_NORM_INV | (invert & 1))
|
||||
|
||||
def show(self):
|
||||
x0 = 0
|
||||
x1 = self.width - 1
|
||||
if self.width == 64:
|
||||
# displays with width of 64 pixels are shifted by 32
|
||||
x0 += 32
|
||||
x1 += 32
|
||||
self.write_cmd(SET_COL_ADDR)
|
||||
self.write_cmd(x0)
|
||||
self.write_cmd(x1)
|
||||
self.write_cmd(SET_PAGE_ADDR)
|
||||
self.write_cmd(0)
|
||||
self.write_cmd(self.pages - 1)
|
||||
self.write_data(self.buffer)
|
||||
|
||||
|
||||
class SSD1306_I2C(SSD1306):
|
||||
def __init__(self, width, height, i2c, addr=0x3c, external_vcc=False):
|
||||
self.i2c = i2c
|
||||
self.addr = addr
|
||||
self.temp = bytearray(2)
|
||||
super().__init__(width, height, external_vcc)
|
||||
|
||||
def write_cmd(self, cmd):
|
||||
self.temp[0] = 0x80 # Co=1, D/C#=0
|
||||
self.temp[1] = cmd
|
||||
self.i2c.writeto(self.addr, self.temp)
|
||||
|
||||
def write_data(self, buf):
|
||||
self.temp[0] = self.addr << 1
|
||||
self.temp[1] = 0x40 # Co=0, D/C#=1
|
||||
self.i2c.start()
|
||||
self.i2c.write(self.temp)
|
||||
self.i2c.write(buf)
|
||||
self.i2c.stop()
|
||||
|
||||
def poweron(self):
|
||||
pass
|
||||
|
||||
|
||||
class SSD1306_SPI(SSD1306):
|
||||
def __init__(self, width, height, spi, dc, res, cs, external_vcc=False):
|
||||
self.rate = 10 * 1024 * 1024
|
||||
dc.init(dc.OUT, value=0)
|
||||
res.init(res.OUT, value=0)
|
||||
cs.init(cs.OUT, value=1)
|
||||
self.spi = spi
|
||||
self.dc = dc
|
||||
self.res = res
|
||||
self.cs = cs
|
||||
super().__init__(width, height, external_vcc)
|
||||
|
||||
def write_cmd(self, cmd):
|
||||
self.spi.init(baudrate=self.rate, polarity=0, phase=0)
|
||||
self.cs(1)
|
||||
self.dc(0)
|
||||
self.cs(0)
|
||||
self.spi.write(bytearray([cmd]))
|
||||
self.cs(1)
|
||||
|
||||
def write_data(self, buf):
|
||||
self.spi.init(baudrate=self.rate, polarity=0, phase=0)
|
||||
self.cs(1)
|
||||
self.dc(1)
|
||||
self.cs(0)
|
||||
self.spi.write(buf)
|
||||
self.cs(1)
|
||||
|
||||
def poweron(self):
|
||||
self.res(1)
|
||||
time.sleep_ms(1)
|
||||
self.res(0)
|
||||
time.sleep_ms(10)
|
||||
self.res(1)
|
||||
|
|
@ -0,0 +1,95 @@
|
|||
# https://learn.adafruit.com/micropython-hardware-ssd1306-oled-display/software
|
||||
import time
|
||||
from machine import I2C, Pin
|
||||
from .ssd1306 import SSD1306_I2C
|
||||
|
||||
class Display:
|
||||
|
||||
def __init__(self,
|
||||
width = 128, height = 64,
|
||||
scl_pin_id = 15, sda_pin_id = 4,
|
||||
freq = 400000):
|
||||
|
||||
self.width = width
|
||||
self.height = height
|
||||
self.poweron()
|
||||
self.i2c = I2C(scl = Pin(scl_pin_id, Pin.OUT),
|
||||
sda = Pin(sda_pin_id),
|
||||
freq = freq)
|
||||
self.display = SSD1306_I2C(width, height, self.i2c)
|
||||
self.show = self.display.show
|
||||
|
||||
def poweron(self, pin=16):
|
||||
pin_reset = Pin(pin, mode=Pin.OUT)
|
||||
pin_reset.value(0)
|
||||
time.sleep_ms(50)
|
||||
pin_reset.value(1)
|
||||
|
||||
def clear(self):
|
||||
self.display.fill(0)
|
||||
self.display.show()
|
||||
|
||||
|
||||
def show_text(self, text, x = 0, y = 0, clear_first = True, show_now = True, hold_seconds = 0):
|
||||
if clear_first: self.display.fill(0)
|
||||
self.display.text(text, x, y)
|
||||
if show_now:
|
||||
self.display.show()
|
||||
if hold_seconds > 0: time.sleep(hold_seconds)
|
||||
|
||||
|
||||
def wrap(self, text, start_line = 0,
|
||||
height_per_line = 8, width_per_char = 8,
|
||||
start_pixel_each_line = 0):
|
||||
|
||||
chars_per_line = self.width//width_per_char
|
||||
max_lines = self.height//height_per_line - start_line
|
||||
lines = [(text[chars_per_line*line: chars_per_line*(line+1)], start_pixel_each_line, height_per_line*(line+start_line))
|
||||
for line in range(max_lines)]
|
||||
|
||||
return lines
|
||||
|
||||
|
||||
def draw_logo(self, x_pos=0):
|
||||
font_height = 50
|
||||
min_x = x_pos
|
||||
min_y = 10
|
||||
|
||||
self.display.fill(0)
|
||||
|
||||
self.display.fill_rect(min_x, min_y + font_height//2, 5, font_height//2, 1)
|
||||
self.display.fill_rect(min_x, min_y + font_height//4, 5, 5, 1)
|
||||
|
||||
xshift = 10
|
||||
|
||||
self.display.rect(xshift + min_x, min_y, 5, font_height, 1)
|
||||
self.display.rect(xshift + min_x + 4, min_y, font_height//2, font_height//2, 1)
|
||||
self.display.line(xshift + min_x + 5, min_y + font_height//2, xshift + min_x + 5 + font_height//2, min_y + font_height, 1)
|
||||
self.display.show()
|
||||
|
||||
def show_text_wrap(self, text,
|
||||
start_line = 0, height_per_line = 8, width_per_char = 8, start_pixel_each_line = 0,
|
||||
clear_first = True, show_now = True, hold_seconds = 0):
|
||||
|
||||
if clear_first: self.clear()
|
||||
|
||||
for line, x, y in self.wrap(text, start_line, height_per_line, width_per_char, start_pixel_each_line):
|
||||
self.show_text(line, x, y, clear_first = False, show_now = False)
|
||||
|
||||
if show_now:
|
||||
self.display.show()
|
||||
if hold_seconds > 0: time.sleep(hold_seconds)
|
||||
|
||||
|
||||
def show_datetime(self, year, month, day, hour, minute, second):
|
||||
datetime = [year, month, day, hour, minute, second]
|
||||
datetime_str = ["{0:0>2}".format(d) for d in datetime]
|
||||
|
||||
self.show_text(text = '-'.join(datetime_str[:3]),
|
||||
x = 0, y = 0, clear_first = True, show_now = False)
|
||||
self.show_text(text = ':'.join(datetime_str[3:6]),
|
||||
x = 0, y = 10, clear_first = False, show_now = True)
|
||||
|
||||
|
||||
def show_time(self, year, month, day, hour, minute, second):
|
||||
self.show_datetime(year, month, day, hour, minute, second)
|
||||
Loading…
Reference in New Issue