/
Pico_ePaper.py
599 lines (489 loc) · 19.1 KB
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Pico_ePaper.py
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# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#
# LUTs have been copied from original example for Waveshare Pico e-Paper 3.7,
# which can be found here:
# https://github.com/waveshare/Pico_ePaper_Code/blob/main/python/Pico-ePaper-3.7.py
#
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
EPD_3IN7_lut_4Gray_GC = bytes([
0x2A, 0x06, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 1
0x28, 0x06, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 2
0x20, 0x06, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 3
0x14, 0x06, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 4
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 5
0x00, 0x02, 0x02, 0x0A, 0x00, 0x00, 0x00, 0x08, 0x08, 0x02, # 6
0x00, 0x02, 0x02, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 8
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 10
0x22, 0x22, 0x22, 0x22, 0x22
])
EPD_3IN7_lut_1Gray_GC = bytes([
0x2A, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 1
0x05, 0x2A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 2
0x2A, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 3
0x05, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 4
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 5
0x00, 0x02, 0x03, 0x0A, 0x00, 0x02, 0x06, 0x0A, 0x05, 0x00, # 6
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 8
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 10
0x22, 0x22, 0x22, 0x22, 0x22
])
EPD_3IN7_lut_1Gray_DU = bytes([
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 1
0x01, 0x2A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0A, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 3
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 5
0x00, 0x00, 0x05, 0x05, 0x00, 0x05, 0x03, 0x05, 0x05, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x22, 0x22, 0x22, 0x22, 0x22
])
EPD_3IN7_lut_1Gray_A2 = bytes([
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 1
0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 2
0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 3
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 4
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 5
0x00, 0x00, 0x03, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 6
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 8
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # 10
0x22, 0x22, 0x22, 0x22, 0x22
])
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
from machine import Pin
import framebuf
from utime import ticks_ms, ticks_diff, sleep_ms
from ustruct import pack
import gc
import micropython
def profile(func):
def wrapper(*args, **kwargs):
gc.collect()
start_mem = gc.mem_free()
start_t = ticks_ms()
func(*args, **kwargs)
fin_t = ticks_ms()
fin_mem = gc.mem_free()
print(f'{func.__name__} took: {ticks_diff(fin_t, start_t)} ms to finish')
print(f'{func.__name__} used around {start_mem - fin_mem} B of memory')
return wrapper
class EinkBase:
black = 0b00
white = 0b11
darkgray = 0b01
lightgray = 0b10
RAM_BW = 0b01
RAM_RED = 0b10
RAM_RBW = 0b11
def __init__(self, rotation=0, cs_pin=None, dc_pin=None, reset_pin=None, busy_pin=None, use_partial_buffer=False):
if rotation == 0 or rotation == 180:
self.width = 280
self.height = 480
buf_format = framebuf.MONO_HLSB
self._horizontal = False
elif rotation == 90 or rotation == 270:
self.width = 480
self.height = 280
buf_format = framebuf.MONO_VLSB
self._horizontal = True
else:
raise ValueError(
f"Incorrect rotation selected ({rotation}). Valid values: 0, 90, 180 and 270.")
self._rotation = rotation
if reset_pin is None:
self._rst = Pin(12, Pin.OUT, value=0)
else:
self._rst = reset_pin
self._rst.init(Pin.OUT, value=0)
if dc_pin is None:
self._dc = Pin(8, Pin.OUT, value=0)
else:
self._dc = dc_pin
self._dc.init(Pin.OUT, value=0)
if cs_pin is None:
self._cs = Pin(9, Pin.OUT, value=1)
else:
self._cs = cs_pin
self._cs.init(Pin.OUT, value=1)
if busy_pin is None:
self._busy = Pin(13, Pin.IN, Pin.PULL_UP)
else:
self._busy = busy_pin
self._busy.init(Pin.IN)
self._luts = {0: EPD_3IN7_lut_4Gray_GC,
1: EPD_3IN7_lut_1Gray_GC,
2: EPD_3IN7_lut_1Gray_DU,
3: EPD_3IN7_lut_1Gray_A2}
self._buffer_bw_actual = bytearray(self.width * self.height // 8)
self._buffer_red = bytearray(self.width * self.height // 8)
self._bw_actual = framebuf.FrameBuffer(self._buffer_bw_actual, self.width, self.height, buf_format)
self._red = framebuf.FrameBuffer(self._buffer_red, self.width, self.height, buf_format)
# Don't start in partial mode.
self._partial = False
self._use_partial_buffer = use_partial_buffer
# Use separate buffer for partial updates only if user wants it, use bw buffer otherwise.
if use_partial_buffer:
self._buffer_partial = bytearray(self.width * self.height // 8)
self._part = framebuf.FrameBuffer(self._buffer_partial, self.width, self.height, buf_format)
# Alias buffer and FrameBuffer to indicate which buffer should be treated as BW RAM buffer.
self._buffer_bw = self._buffer_bw_actual
self._bw = self._bw_actual
self.fill()
self._init_disp()
sleep_ms(500)
def _reset(self):
self._rst(1)
sleep_ms(30)
self._rst(0)
sleep_ms(3)
self._rst(1)
sleep_ms(30)
def _send_command(self, command):
raise NotImplementedError
def _send_data(self, data):
raise NotImplementedError
def _send(self, command, data):
self._send_command(command)
self._send_data(data)
def _read_busy(self):
while self._busy.value() == 1:
sleep_ms(10)
sleep_ms(200)
def _load_LUT(self, lut=0):
self._send(0x32, self._luts[lut])
def _set_cursor(self, x, y):
self._send(0x4e, pack("h", x))
self._send(0x4f, pack("h", y))
def _set_window(self, start_x, end_x, start_y, end_y):
self._send(0x44, pack("2h", start_x, end_x))
self._send(0x45, pack("2h", start_y, end_y))
def _clear_ram(self, bw=True, red=True):
if red:
self._send(0x46, 0xf7)
self._read_busy()
if bw:
self._send(0x47, 0xf7)
self._read_busy()
def _init_disp(self):
# HW reset.
self._reset()
# SW reset.
self._send_command(0x12)
sleep_ms(300)
# Clear BW and RED RAMs.
self._clear_ram()
# Set gate number.
self._send(0x01, pack("hB", 479, 0))
# Set gate voltage.
self._send(0x03, 0x00)
# Set source voltage.
self._send(0x04, pack("3B", 0x41, 0xa8, 0x32))
# Set Data Entry mode.
if self._rotation == 0:
seq = 0x03
elif self._rotation == 180:
seq = 0x00
elif self._rotation == 90:
seq = 0x06
elif self._rotation == 270:
seq = 0x05
else:
raise ValueError(f"Incorrect rotation selected")
self._send(0x11, seq)
# Set border.
self._send(0x3c, 0x03)
# Booster Soft-start Control.
self._send(0x0c, pack("5B", 0xae, 0xc7, 0xc3, 0xc0, 0xc0))
# Internal sensor on.
self._send(0x18, 0x80)
# Set VCOM.
self._send(0x2c, 0x44)
# Set window.
if self._rotation == 0:
self._set_window(0, self.width - 1, 0, self.height - 1)
elif self._rotation == 180:
self._set_window(self.width - 1, 0, self.height - 1, 0)
elif self._rotation == 90:
self._set_window(self.height - 1, 0, 0, self.width - 1)
elif self._rotation == 270:
self._set_window(0, self.height - 1, self.width - 1, 0)
else:
raise ValueError(f"Incorrect rotation selected")
# Set Display Update Control 2
self._send(0x22, 0xcf)
# --------------------------------------------------------
# Public methods.
# --------------------------------------------------------
def reinit(self):
"""Public method for screen reinitialisation."""
self._init_disp()
def partial_mode_on(self):
self._send(0x37, pack("10B", 0x00, 0xff, 0xff, 0xff, 0xff, 0x4f, 0xff, 0xff, 0xff, 0xff))
self._clear_ram()
if self._use_partial_buffer:
self._buffer_bw = self._buffer_partial
self._bw = self._part
self._part.fill(1)
self._partial = True
def partial_mode_off(self):
self._send(0x37, pack("10B", 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00))
self._clear_ram()
if self._use_partial_buffer:
self._buffer_bw = self._buffer_bw_actual
self._bw = self._bw_actual
self._partial = False
def show(self, lut=0):
if self._rotation == 0:
self._set_cursor(0, 0)
elif self._rotation == 180:
self._set_cursor(self.width - 1, self.height - 1)
elif self._rotation == 90:
self._set_cursor(self.height - 1, 0)
else:
self._set_cursor(0, self.width - 1)
def sleep(self):
self._send(0x10, 0x03)
# --------------------------------------------------------
# Drawing routines (wrappers for FrameBuffer methods).
# --------------------------------------------------------
def fill(self, c=white):
self._bw.fill(c & 1)
if not self._partial:
self._red.fill(c >> 1)
def pixel(self, x, y, c=black):
self._bw.pixel(x, y, c & 1)
if not self._partial:
self._red.pixel(x, y, c >> 1)
def hline(self, x, y, w, c=black):
self._bw.hline(x, y, w, c & 1)
if not self._partial:
self._red.hline(x, y, w, c >> 1)
def vline(self, x, y, h, c=black):
self._bw.vline(x, y, h, c & 1)
if not self._partial:
self._red.vline(x, y, h, c >> 1)
def line(self, x1, y1, x2, y2, c=black):
self._bw.line(x1, y1, x2, y2, c & 1)
if not self._partial:
self._red.line(x1, y1, x2, y2, c >> 1)
def rect(self, x, y, w, h, c=black, f=False):
self._bw.rect(x, y, w, h, c & 1, f)
if not self._partial:
self._red.rect(x, y, w, h, c >> 1, f)
def ellipse(self, x, y, xr, yr, c=black, f=False, m=15):
self._bw.ellipse(x, y, xr, yr, c & 1, f, m)
if not self._partial:
self._red.ellipse(x, y, xr, yr, c >> 1, f, m)
def poly(self, x, y, coords, c=black, f=False):
self._bw.poly(x, y, coords, c & 1, f)
if not self._partial:
self._red.poly(x, y, coords, c >> 1, f)
def text(self, text, x, y, c=black):
self._bw.text(text, x, y, c & 1)
if not self._partial:
self._red.text(text, x, y, c >> 1)
def blit(self, fbuf, x, y, key=-1, palette=None, ram=RAM_RBW):
if ram & 1 == 1 or self._partial:
self._bw.blit(fbuf, x, y, key, palette)
if (ram >> 1) & 1 == 1:
self._red.blit(fbuf, x, y, key, palette)
class Eink(EinkBase):
from machine import SPI
def __init__(self, spi=None, *args, **kwargs):
if spi is None:
self._spi = self.SPI(1, baudrate=20_000_000)
else:
self._spi = spi
super(Eink, self).__init__(*args, **kwargs)
def _send_command(self, command):
self._dc(0)
self._cs(0)
if isinstance(command, int):
self._spi.write(bytes([command]))
elif isinstance(command, (bytes, bytearray)):
self._spi.write(command)
else:
raise ValueError # For now
self._cs(1)
def _send_data(self, data):
self._dc(1)
self._cs(0)
if isinstance(data, int):
self._spi.write(bytes([data]))
elif isinstance(data, (bytes, bytearray)):
self._spi.write(data)
else:
raise ValueError # For now
self._cs(1)
@micropython.viper
def _reverse_bits(self, num: int) -> int:
result = 0
for i in range(8):
result = (result << 1) | ((num >> i) & 1)
return result
def _send_buffer(self, buffer):
if self._horizontal:
self._send_data(bytes(map(self._reverse_bits, buffer)))
else:
self._send_data(buffer)
# --------------------------------------------------------
# Public methods.
# --------------------------------------------------------
# @profile
def show(self, lut=0):
super().show()
self._send_command(0x24)
self._send_buffer(self._buffer_bw)
if self._partial:
self._load_LUT(2)
else:
self._send_command(0x26)
self._send_buffer(self._buffer_red)
self._load_LUT(lut)
self._send_command(0x20)
self._read_busy()
class EinkPIO(EinkBase):
from machine import mem32
def __init__(self, sm_num=0, dma=5, *args, **kwargs):
self._sm_num = sm_num
self._dma = int(dma * 0x40 + 0x50000030)
self._sm = None
self._sm_shiftctrl = (0x502000d0 + 0x100000 * (self._sm_num // 4)
+ 0x18 * (self._sm_num % 4))
self._dma_write_addr = (0x50200010 + 0x100000 * (self._sm_num // 4)
+ 0x4 * (self._sm_num % 4))
dreq = self._sm_num % 4 + 8 * (self._sm_num // 4)
self._dma_ctrl = dreq << 15 | 1 << 4 | 1
self._pio_setup()
super(EinkPIO, self).__init__(*args, **kwargs)
def _pio_setup(self):
from rp2 import asm_pio, PIO, StateMachine
@asm_pio(out_init=PIO.OUT_LOW,
sideset_init=PIO.OUT_LOW,
autopull=True,
pull_thresh=8,
out_shiftdir=PIO.SHIFT_LEFT)
def pio_serial_tx():
out(pins, 1).side(0)
nop().side(1)
self._sm = StateMachine(self._sm_num, pio_serial_tx, freq=40_000_000,
sideset_base=Pin(10), out_base=Pin(11))
self._sm.active(1)
def _reversed_output(self):
self.mem32[self._sm_shiftctrl + 0x2000] = 1 << 19
def _normal_output(self):
self.mem32[self._sm_shiftctrl + 0x3000] = 1 << 19
def _send_command(self, command):
self._dc(0)
self._cs(0)
if isinstance(command, int):
self._sm.put(command, 24)
elif isinstance(command, (bytes, bytearray)):
for cmd in command:
self._sm.put(cmd, 24)
else:
raise ValueError
self._cs(1)
def _send_data(self, data):
self._dc(1)
self._cs(0)
if isinstance(data, int):
self._sm.put(data, 24)
elif isinstance(data, (bytes, bytearray)):
for cmd in data:
self._sm.put(cmd, 24)
else:
raise ValueError
self._cs(1)
@micropython.viper
def _dma_start(self, buffer):
dma_ptr = ptr32(self._dma)
dma_ptr[0] = int(self._dma_ctrl)
dma_ptr[1] = int(self._dma_write_addr)
dma_ptr[2] = int(len(buffer))
dma_ptr[3] = int(ptr32(buffer))
@micropython.viper
def _check_dma_busy(self, a: ptr32) -> int:
return (a[0] >> 24) & 1
def _send_buffer(self, buffer):
if self._horizontal:
self._reversed_output()
self._dc(1)
self._cs(0)
self._dma_start(buffer)
dma_ctrl = self._dma
start = ticks_ms()
while self._check_dma_busy(dma_ctrl) and ticks_diff(ticks_ms(), start) < 5000:
pass
self._cs(1)
if ticks_diff(ticks_ms(), start) >= 5000:
print('loading data took too long')
if self._horizontal:
self._normal_output()
# --------------------------------------------------------
# Public methods.
# --------------------------------------------------------
# @profile
def show(self, lut=0):
super().show()
self._send_command(0x24)
self._send_buffer(self._buffer_bw)
if self._partial:
self._load_LUT(2)
else:
self._send_command(0x26)
self._send_buffer(self._buffer_red)
self._load_LUT(lut)
self._send_command(0x20)
self._read_busy()
if __name__ == "__main__":
from uarray import array
from time import sleep
epd = EinkPIO(rotation=270, use_partial_buffer=True)
epd.fill()
epd.text("test", 10, 10)
epd.rect(0, 19, 52, 10, epd.lightgray, f=True)
epd.text("test", 10, 20, epd.darkgray)
epd.rect(0, 29, 52, 10, epd.darkgray, f=True)
epd.text("test", 10, 30, epd.lightgray)
epd.rect(0, 39, 52, 10, f=True)
epd.text("test", 10, 40, epd.white)
epd.rect(0, 8, 52, 41)
epd.hline(5, 60, 50)
epd.hline(5, 160, 50)
epd.vline(5, 60, 100)
epd.vline(55, 60, 100)
epd.line(5, 60, 55, 160)
epd.line(55, 60, 5, 160)
epd.rect(65, 20, 50, 50, f=True)
epd.rect(65, 70, 50, 50, epd.darkgray, f=True)
epd.rect(65, 120, 50, 50, epd.lightgray, f=True)
epd.rect(65, 170, 50, 50, f=True)
epd.rect(65, 20, 50, 200)
epd.ellipse(150, 120, 25, 100, epd.lightgray, f=True, m=0b1010)
epd.ellipse(150, 120, 25, 100, epd.darkgray, f=True, m=0b0101)
epd.ellipse(150, 120, 25, 25, f=True)
epd.ellipse(150, 120, 10, 10, epd.white, f=True)
epd.show()
epd.sleep()
sleep(5)
# To use the screen after putting it to sleep, the reinitialisation is required.
epd.reinit()
bestagon = array('h', [0, 0, 50, 0, 75, 43, 50, 86, 0, 86, -25, 43])
epd.poly(205, 77, bestagon, c=epd.darkgray, f=True)
epd.show()
epd.partial_mode_on()
for i in range(10):
epd.text(str(i), 10, 200)
epd.show()
epd.text(str(i), 10, 200, epd.white)
epd.partial_mode_off()
epd.sleep()