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charlieplex.py
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import math
import utime
_MODE_REGISTER = const(0x00)
_FRAME_REGISTER = const(0x01)
_AUTOPLAY1_REGISTER = const(0x02)
_AUTOPLAY2_REGISTER = const(0x03)
_BLINK_REGISTER = const(0x05)
_AUDIOSYNC_REGISTER = const(0x06)
_BREATH1_REGISTER = const(0x08)
_BREATH2_REGISTER = const(0x09)
_SHUTDOWN_REGISTER = const(0x0a)
_GAIN_REGISTER = const(0x0b)
_ADC_REGISTER = const(0x0c)
_CONFIG_BANK = const(0x0b)
_BANK_ADDRESS = const(0xfd)
_PICTURE_MODE = const(0x00)
_AUTOPLAY_MODE = const(0x08)
_AUDIOPLAY_MODE = const(0x18)
_ENABLE_OFFSET = const(0x00)
_BLINK_OFFSET = const(0x12)
_COLOR_OFFSET = const(0x24)
class Matrix:
width = 16
height = 9
def __init__(self, i2c, address=0x74):
self.i2c = i2c
self.address = address
self.reset()
self.init()
def _bank(self, bank=None):
if bank is None:
return self.i2c.readfrom_mem(self.address, _BANK_ADDRESS, 1)[0]
self.i2c.writeto_mem(self.address, _BANK_ADDRESS, bytearray([bank]))
def _register(self, bank, register, value=None):
self._bank(bank)
if value is None:
return self.i2c.readfrom_mem(self.address, register, 1)[0]
self.i2c.writeto_mem(self.address, register, bytearray([value]))
def _mode(self, mode=None):
return self._register(_CONFIG_BANK, _MODE_REGISTER, mode)
def init(self):
self._mode(_PICTURE_MODE)
self.frame(0)
for frame in range(8):
self.fill(0, False, frame=frame)
for col in range(18):
self._register(frame, _ENABLE_OFFSET + col, 0xff)
self.audio_sync(False)
def reset(self):
self.sleep(True)
utime.sleep_us(10)
self.sleep(False)
def sleep(self, value):
return self._register(_CONFIG_BANK, _SHUTDOWN_REGISTER, not value)
def autoplay(self, delay=0, loops=0, frames=0):
if delay == 0:
self._mode(_PICTURE_MODE)
return
delay //= 11
if not 0 <= loops <= 7:
raise ValueError("Loops out of range")
if not 0 <= frames <= 7:
raise ValueError("Frames out of range")
if not 1 <= delay <= 64:
raise ValueError("Delay out of range")
self._register(_CONFIG_BANK, _AUTOPLAY1_REGISTER, loops << 4 | frames)
self._register(_CONFIG_BANK, _AUTOPLAY2_REGISTER, delay % 64)
self._mode(_AUTOPLAY_MODE | self._frame)
def fade(self, fade_in=None, fade_out=None, pause=0):
if fade_in is None and fade_out is None:
self._register(_CONFIG_BANK, _BREATH2_REGISTER, 0)
elif fade_in is None:
fade_in = fade_out
elif fade_out is None:
fade_out = fade_in
fade_in = int(math.log(fade_in / 26, 2))
fade_out = int(math.log(fade_out / 26, 2))
pause = int(math.log(pause / 26, 2))
if not 0 <= fade_in <= 7:
raise ValueError("Fade in out of range")
if not 0 <= fade_out <= 7:
raise ValueError("Fade out out of range")
if not 0 <= pause <= 7:
raise ValueError("Pause out of range")
self._register(_CONFIG_BANK, _BREATH1_REGISTER, fade_out << 4 | fade_in)
self._register(_CONFIG_BANK, _BREATH2_REGISTER, 1 << 4 | pause)
def frame(self, frame=None, show=True):
if frame is None:
return self._frame
if not 0 <= frame <= 8:
raise ValueError("Frame out of range")
self._frame = frame
if show:
self._register(_CONFIG_BANK, _FRAME_REGISTER, frame);
def audio_sync(self, value=None):
return self._register(_CONFIG_BANK, _AUDIOSYNC_REGISTER, value)
def audio_play(self, sample_rate, audio_gain=0,
agc_enable=False, agc_fast=False):
if sample_rate == 0:
self._mode(_PICTURE_MODE)
return
sample_rate //= 46
if not 1 <= sample_rate <= 256:
raise ValueError("Sample rate out of range")
self._register(_CONFIG_BANK, _ADC_REGISTER, sample_rate % 256)
audio_gain //= 3
if not 0 <= audio_gain <= 7:
raise ValueError("Audio gain out of range")
self._register(_CONFIG_BANK, _GAIN_REGISTER,
bool(agc_enable) << 3 | bool(agc_fast) << 4 | audio_gain)
self._mode(_AUDIOPLAY_MODE)
def blink(self, rate=None):
if rate is None:
return (self._register(_CONFIG_BANK, _BLINK_REGISTER) & 0x07) * 270
elif rate == 0:
self._register(_CONFIG_BANK, _BLINK_REGISTER, 0x00)
return
rate //= 270
self._register(_CONFIG_BANK, _BLINK_REGISTER, rate & 0x07 | 0x08)
def fill(self, color=None, blink=None, frame=None):
if frame is None:
frame = self._frame
self._bank(frame)
if color is not None:
if not 0 <= color <= 255:
raise ValueError("Color out of range")
data = bytearray([color] * 24)
for row in range(6):
self.i2c.writeto_mem(self.address,
_COLOR_OFFSET + row * 24, data)
if blink is not None:
data = bool(blink) * 0xff
for col in range(18):
self._register(frame, _BLINK_OFFSET + col, data)
def _pixel_addr(self, x, y):
return x + y * 16
def pixel(self, x, y, color=None, blink=None, frame=None):
if not 0 <= x <= self.width:
return
if not 0 <= y <= self.height:
return
pixel = self._pixel_addr(x, y)
if color is None and blink is None:
return self._register(self._frame, pixel)
if frame is None:
frame = self._frame
if color is not None:
if not 0 <= color <= 255:
raise ValueError("Color out of range")
self._register(frame, _COLOR_OFFSET + pixel, color)
if blink is not None:
addr, bit = divmod(pixel, 8)
bits = self._register(frame, _BLINK_OFFSET + addr)
if blink:
bits |= 1 << bit
else:
bits &= ~(1 << bit)
self._register(frame, _BLINK_OFFSET + addr, bits)
class CharlieWing(Matrix):
width = 15
height = 7
def _pixel_addr(self, x, y):
if x > 7:
x = 15 - x
y += 8
else:
y = 7 - y
return x * 16 + y