kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
Improved display driver pico_epaper_42.py.
peterhinch
rodzic
e89075a569
commit
c019f35ab4
28
DRIVERS.md
28
DRIVERS.md
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@ -1218,6 +1218,8 @@ Pins 26-40 unused and omitted.
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## 5.3 Waveshare 400x300 Pi Pico display
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The driver for this display now supports partial updates.
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This 4.2" display supports a Pi Pico or Pico W plugged into the rear of the
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unit. Alternatively it can be connected to any other host using the supplied
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cable. With a Pico variant the `color_setup` file is very simple:
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@ -1251,24 +1253,24 @@ following constructor args:
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* `ready` No args. After issuing a `refresh` the device will become busy for
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a period: `ready` status should be checked before issuing `refresh`.
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* `wait_until_ready` No args. Pause until the device is ready.
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* `set_partial()` Enable partial updates.
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* `set_full()` Restore normal update operation.
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##### Asynchronous methods
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* `updated` Asynchronous. No args. Pause until the framebuffer has been copied
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to the display.
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* `wait` Asynchronous. No args. Pause until the display refresh is complete.
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An alternative driver supporting partial updates is `pico_epaper_42_part.py`.
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Usage is as above, but the driver supports two methods:
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* `set_partial()`
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* `set_full()`
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After issuing `set_partial()`, subsequent updates will be partial. Normal
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updates are restored by issuing `set_full()`. These should not be issued while
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an update is in progress.
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After issuing `set_partial()`, subsequent updates will be partial. Normal
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updates are restored by issuing `set_full()`. These methods should not be
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issued while an update is in progress.
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Partial updates are fast and visually unobtrusive but they are prone to
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ghosting.
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##### Asynchronous methods
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* `wait` No args. If an update is in progress, pause until the display refresh
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is complete, otherwise return is immediate.
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* `updated` No args. Pause until the framebuffer has been copied to the
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display. It is now safe to modify the framebuf, but display update may still
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be in progress.
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###### [Contents](./DRIVERS.md#contents)
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# 6. EPD Asynchronous support
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12
README.md
12
README.md
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@ -61,6 +61,7 @@ display.
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3.1 [Application Initialisation](./README.md#31-application-initialisation) Initial setup and refresh method.
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3.1.1 [User defined colors](./README.md#311-user-defined-colors)
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3.1.2 [Monochrome displays](./README.md#312-monochrome-displays) A slight "gotcha" with ePaper.
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3.1.3 [Display update mechanism](./README.md#313-display-update-mechanism) How updates are managed.
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3.2 [Label class](./README.md#32-label-class) Dynamic text at any screen location.
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3.3 [Meter class](./README.md#33-meter-class) A vertical panel meter.
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3.4 [LED class](./README.md#34-led-class) Virtual LED of any color.
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@ -113,6 +114,7 @@ my GUI's employ the American spelling of `color`.
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## 1.1 Change log
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15 Mar 2023 Driver update to 4.2 inch Waveshare ePpaper display.
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12 Feb 2023 Add support for sh1106 driver. Fix color compatibility of SSD1306.
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5 Sep 2022 Add support for additional Pico displays.
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8 Aug 2022 Typo and grammar fixes from @bfiics.
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@ -492,6 +494,16 @@ color may come as a surprise.
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In general the solution is to leave color settings at default.
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### 3.1.3 Display update mechanism
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A typical application comprises various widgets displaying user data. When a
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widget's `value` method is called, the framebuffer's contents are updated to
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reflect the widget's current state. The framebuffer is transferred to the
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physical hardware when `refresh(device)` is called. This allows multiple
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widgets to be refreshed at the same time. It also minimises processor overhead:
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`.value` is generally fast, while `refresh` is slow because of the time taken
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to transfer an entire buffer over SPI.
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###### [Contents](./README.md#contents)
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## 3.2 Label class
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@ -1,8 +1,11 @@
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# pico_epaper_42.py A 1-bit monochrome display driver for the Waveshare Pico
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# ePaper 4.2" display.
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# https://www.waveshare.com/pico-epaper-4.2.htm
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# Adapted from the Waveshare driver by Peter Hinch Sept 2022.
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# ePaper 4.2" display. Version supports partial updates.
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# Adapted from the Waveshare driver by Peter Hinch Sept 2022-March 2023.
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# https://www.waveshare.com/pico-epaper-4.2.htm
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# UC8176 manual https://www.waveshare.com/w/upload/8/88/UC8176.pdf
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# Note that Waveshare's version of this driver may be out of date
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# https://github.com/waveshare/Pico_ePaper_Code/blob/main/pythonNanoGui/drivers/ePaper4in2.py
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# *****************************************************************************
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# * | File : Pico_ePaper-3.7.py
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@ -31,7 +34,9 @@
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# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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# If .set_partial() is called, subsequent updates will be partial. To restore normal
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# updates, issue .set_full()
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from machine import Pin, SPI
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import framebuf
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@ -65,6 +70,29 @@ EPD_lut_wb = b"\xA0\x08\x08\x00\x00\x02\x90\x0F\x0F\x00\x00\x01\x50\x08\x08\x00\
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EPD_lut_bb = b"\x20\x08\x08\x00\x00\x02\x90\x0F\x0F\x00\x00\x01\x10\x08\x08\x00\x00\x02\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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# ******************************partial screen update LUT********************************* #
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EPD_partial_lut_vcom1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00"
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EPD_partial_lut_ww1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00"
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EPD_partial_lut_bw1 =b"\x80\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00"
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EPD_partial_lut_wb1 = b"\x40\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00"
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EPD_partial_lut_bb1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00"
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class EPD(framebuf.FrameBuffer):
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# A monochrome approach should be used for coding this. The rgb method ensures
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# nothing breaks if users specify colors.
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@ -77,10 +105,10 @@ class EPD(framebuf.FrameBuffer):
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self.busy_pin = Pin(BUSY_PIN, Pin.IN, Pin.PULL_UP) if busy is None else busy
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self.cs_pin = Pin(CS_PIN, Pin.OUT) if cs is None else cs
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self.dc_pin = Pin(DC_PIN, Pin.OUT) if dc is None else dc
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self.spi = SPI(1) if spi is None else spi
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self.spi = SPI(1, sck = Pin(10), mosi=Pin(11), miso=Pin(28)) if spi is None else spi
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self.spi.init(baudrate=4_000_000)
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self._asyn = asyn
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self._as_busy = False # Set immediately on start of task. Cleared when busy pin is logically false (physically 1).
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self._busy = False # Set immediately on start of task. Cleared when busy pin is logically false (physically 1).
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self._updated = asyncio.Event()
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self.width = _EPD_WIDTH
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@ -97,7 +125,7 @@ class EPD(framebuf.FrameBuffer):
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def reset(self):
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for v in (1, 0, 1):
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self.reset_pin(v)
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time.sleep_ms(20)
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time.sleep_ms(20)
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def send_command(self, command):
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self.dc_pin(0)
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@ -150,6 +178,22 @@ class EPD(framebuf.FrameBuffer):
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self.send_command(b"\x50") # VCOM AND DATA INTERVAL SETTING
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self.send_bytes(b"\x97") # 97white border 77black border VBDF 17|D7 VBDW 97 VBDB 57 VBDF F7 VBDW 77 VBDB 37 VBDR B7
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self.set_full()
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# Clear display
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self.send_command(b"\x10")
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for j in range(_EPD_HEIGHT):
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self.send_bytes(b"\xff" * _BWIDTH)
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self.send_command(b"\x13")
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for j in range(_EPD_HEIGHT):
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self.send_bytes(b"\xff" * _BWIDTH)
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self.send_command(b"\x12")
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time.sleep_ms(10)
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self.display_on()
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def set_full(self): # Normal full updates
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self.send_command(b"\x20")
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self.send_bytes(EPD_lut_vcom0)
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@ -164,38 +208,41 @@ class EPD(framebuf.FrameBuffer):
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self.send_command(b"\x24")
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self.send_bytes(EPD_lut_bb)
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# Clear display
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self.send_command(b"\x10")
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for j in range(_EPD_HEIGHT):
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self.send_bytes(b"\xff" * _BWIDTH)
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self.send_command(b"\x13")
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for j in range(_EPD_HEIGHT):
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self.send_bytes(b"\xff" * _BWIDTH)
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self.send_command(b"\x12")
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time.sleep_ms(10)
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self.display_on()
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def set_partial(self): # Partial updates
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self.send_command(b"\x20")
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self.send_bytes(EPD_partial_lut_vcom1)
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self.send_command(b"\x21")
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self.send_bytes(EPD_partial_lut_ww1)
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self.send_command(b"\x22")
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self.send_bytes(EPD_partial_lut_bw1)
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self.send_command(b"\x23")
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self.send_bytes(EPD_partial_lut_wb1)
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self.send_command(b"\x24")
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self.send_bytes(EPD_partial_lut_bb1)
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def wait_until_ready(self):
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while(not self.ready()):
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self.send_command(b"\x71")
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while not self.ready():
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time.sleep_ms(100)
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async def wait(self):
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await asyncio.sleep_ms(0) # Ensure tasks run that might make it unready
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while not self.ready():
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self.send_command(b"\x71")
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await asyncio.sleep_ms(100)
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# Pause until framebuf has been copied to device.
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async def updated(self):
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self._updated.clear()
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await self._updated.wait()
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self._updated.clear()
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# For polling in asynchronous code. Just checks pin state.
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# 0 == busy. Comment in official code is wrong. Code is correct.
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def ready(self):
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return not(self._as_busy or (self.busy_pin() == 0)) # 0 == busy
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return not (self._busy or (self.busy_pin() == 0)) # 0 == busy
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def _line(self, n, buf=bytearray(_BWIDTH)):
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img = self.mvb
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@ -206,27 +253,26 @@ class EPD(framebuf.FrameBuffer):
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async def _as_show(self):
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self.send_command(b"\x13")
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for j in range(_EPD_HEIGHT): # Loop blocks ~300ms
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for j in range(_EPD_HEIGHT): # Loop would block ~300ms
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self._line(j)
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# For some reason the following did not work
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#await asyncio.sleep_ms(0)
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await asyncio.sleep_ms(0)
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self._updated.set()
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self.send_command(b"\x12") # Async .display_on()
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while not self.busy_pin():
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await asyncio.sleep_ms(10) # About 1.7s
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self._updated.set()
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self._updated.clear()
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self._as_busy = False
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self._busy = False
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def show(self):
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if self._busy:
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raise RuntimeError('Cannot refresh: display is busy.')
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self._busy = True # Immediate busy flag. Pin goes low much later.
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if self._asyn:
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if self._as_busy:
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raise RuntimeError('Cannot refresh: display is busy.')
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self._as_busy = True # Immediate busy flag. Pin goes low much later.
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asyncio.create_task(self._as_show())
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return
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self.send_command(b"\x13")
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for j in range(_EPD_HEIGHT):
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self._line(j)
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self._busy = False
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self.display_on()
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self.wait_until_ready()
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@ -1,281 +0,0 @@
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# pico_epaper_42_part.py A 1-bit monochrome display driver for the Waveshare Pico
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# ePaper 4.2" display. Version supports partial updates.
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# Adapted from the Waveshare driver by Peter Hinch Sept 2022.
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# https://www.waveshare.com/pico-epaper-4.2.htm
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# UC8176 manual https://www.waveshare.com/w/upload/8/88/UC8176.pdf
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# Note that Waveshare's version of this driver may be out of data
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# https://github.com/waveshare/Pico_ePaper_Code/blob/main/pythonNanoGui/drivers/ePaper4in2.py
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# *****************************************************************************
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# * | File : Pico_ePaper-3.7.py
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# * | Author : Waveshare team
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# * | Function : Electronic paper driver
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# * | Info :
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# *----------------
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# * | This version: V1.0
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# * | Date : 2021-06-01
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# # | Info : python demo
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# -----------------------------------------------------------------------------
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# Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
# of this software and associated documnetation files (the "Software"), to deal
|
||||
# in the Software without restriction, including without limitation the rights
|
||||
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
# copies of the Software, and to permit persons to whom the Software is
|
||||
# furished to do so, subject to the following conditions:
|
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#
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||||
# The above copyright notice and this permission notice shall be included in
|
||||
# all copies or substantial portions of the Software.
|
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
# THE SOFTWARE.
|
||||
|
||||
# If .set_partial() is called, subsequent updates will be partial. To restore normal
|
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# updates, issue .set_full()
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|
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from machine import Pin, SPI
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import framebuf
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import time
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import uasyncio as asyncio
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from drivers.boolpalette import BoolPalette
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# Display resolution
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_EPD_WIDTH = const(400)
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_BWIDTH = _EPD_WIDTH // 8
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_EPD_HEIGHT = const(300)
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RST_PIN = 12
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DC_PIN = 8
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CS_PIN = 9
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BUSY_PIN = 13
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EPD_lut_vcom0 = b"\x00\x08\x08\x00\x00\x02\x00\x0F\x0F\x00\x00\x01\x00\x08\x08\x00\
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\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
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\x00\x00\x00\x00\x00\x00"
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EPD_lut_ww = b"\x50\x08\x08\x00\x00\x02\x90\x0F\x0F\x00\x00\x01\xA0\x08\x08\x00\x00\x02\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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EPD_lut_bw = b"\x50\x08\x08\x00\x00\x02\x90\x0F\x0F\x00\x00\x01\xA0\x08\x08\x00\x00\x02\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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EPD_lut_wb = b"\xA0\x08\x08\x00\x00\x02\x90\x0F\x0F\x00\x00\x01\x50\x08\x08\x00\x00\x02\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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EPD_lut_bb = b"\x20\x08\x08\x00\x00\x02\x90\x0F\x0F\x00\x00\x01\x10\x08\x08\x00\x00\x02\
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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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||||
# ******************************partial screen update LUT********************************* #
|
||||
|
||||
EPD_partial_lut_vcom1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00\x00\x00"
|
||||
|
||||
EPD_partial_lut_ww1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00"
|
||||
|
||||
EPD_partial_lut_bw1 =b"\x80\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00"
|
||||
|
||||
EPD_partial_lut_wb1 = b"\x40\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00"
|
||||
|
||||
|
||||
EPD_partial_lut_bb1 = b"\x00\x19\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
|
||||
\x00\x00\x00\x00"
|
||||
|
||||
class EPD(framebuf.FrameBuffer):
|
||||
# A monochrome approach should be used for coding this. The rgb method ensures
|
||||
# nothing breaks if users specify colors.
|
||||
@staticmethod
|
||||
def rgb(r, g, b):
|
||||
return int((r > 127) or (g > 127) or (b > 127))
|
||||
|
||||
def __init__(self, spi=None, cs=None, dc=None, rst=None, busy=None, asyn=False):
|
||||
self.reset_pin = Pin(RST_PIN, Pin.OUT) if rst is None else rst
|
||||
self.busy_pin = Pin(BUSY_PIN, Pin.IN, Pin.PULL_UP) if busy is None else busy
|
||||
self.cs_pin = Pin(CS_PIN, Pin.OUT) if cs is None else cs
|
||||
self.dc_pin = Pin(DC_PIN, Pin.OUT) if dc is None else dc
|
||||
self.spi = SPI(1) if spi is None else spi
|
||||
self.spi.init(baudrate=4_000_000)
|
||||
self._asyn = asyn
|
||||
self._as_busy = False # Set immediately on start of task. Cleared when busy pin is logically false (physically 1).
|
||||
self._updated = asyncio.Event()
|
||||
|
||||
self.width = _EPD_WIDTH
|
||||
self.height = _EPD_HEIGHT
|
||||
self.buf = bytearray(_EPD_HEIGHT * _BWIDTH)
|
||||
self.mvb = memoryview(self.buf)
|
||||
mode = framebuf.MONO_HLSB
|
||||
self.palette = BoolPalette(mode)
|
||||
super().__init__(self.buf, _EPD_WIDTH, _EPD_HEIGHT, mode)
|
||||
self.init()
|
||||
time.sleep_ms(500)
|
||||
|
||||
# Hardware reset
|
||||
def reset(self):
|
||||
for v in (1, 0, 1):
|
||||
self.reset_pin(v)
|
||||
time.sleep_ms(20)
|
||||
|
||||
def send_command(self, command):
|
||||
self.dc_pin(0)
|
||||
self.cs_pin(0)
|
||||
self.spi.write(command)
|
||||
self.cs_pin(1)
|
||||
|
||||
def send_bytes(self, data):
|
||||
self.dc_pin(1)
|
||||
self.cs_pin(0)
|
||||
self.spi.write(data)
|
||||
self.cs_pin(1)
|
||||
|
||||
def display_on(self):
|
||||
self.send_command(b"\x12")
|
||||
time.sleep_ms(100)
|
||||
self.wait_until_ready()
|
||||
|
||||
def init(self):
|
||||
self.reset()
|
||||
self.send_command(b"\x01") # POWER SETTING
|
||||
self.send_bytes(b"\x03")
|
||||
self.send_bytes(b"\x00")
|
||||
self.send_bytes(b"\x2b")
|
||||
self.send_bytes(b"\x2b")
|
||||
|
||||
self.send_command(b"\x06") # boost soft start
|
||||
self.send_bytes(b"\x17") # A
|
||||
self.send_bytes(b"\x17") # B
|
||||
self.send_bytes(b"\x17") # C
|
||||
|
||||
self.send_command(b"\x04") # POWER_ON
|
||||
self.wait_until_ready()
|
||||
|
||||
self.send_command(b"\x00") # panel setting
|
||||
self.send_bytes(b"\xbf") # KW-BF KWR-AF BWROTP 0f BWOTP 1f
|
||||
self.send_bytes(b"\x0d")
|
||||
|
||||
self.send_command(b"\x30") # PLL setting
|
||||
self.send_bytes(b"\x3C") # 3A 100HZ 29 150Hz 39 200HZ 31 171HZ
|
||||
|
||||
self.send_command(b"\x61") # resolution setting
|
||||
self.send_bytes(b"\x01")
|
||||
self.send_bytes(b"\x90") # 128
|
||||
self.send_bytes(b"\x01")
|
||||
self.send_bytes(b"\x2c")
|
||||
|
||||
self.send_command(b"\x82") # vcom_DC setting
|
||||
self.send_bytes(b"\x28")
|
||||
|
||||
self.send_command(b"\x50") # VCOM AND DATA INTERVAL SETTING
|
||||
self.send_bytes(b"\x97") # 97white border 77black border VBDF 17|D7 VBDW 97 VBDB 57 VBDF F7 VBDW 77 VBDB 37 VBDR B7
|
||||
|
||||
self.set_full()
|
||||
# Clear display
|
||||
self.send_command(b"\x10")
|
||||
for j in range(_EPD_HEIGHT):
|
||||
self.send_bytes(b"\xff" * _BWIDTH)
|
||||
|
||||
self.send_command(b"\x13")
|
||||
for j in range(_EPD_HEIGHT):
|
||||
self.send_bytes(b"\xff" * _BWIDTH)
|
||||
|
||||
self.send_command(b"\x12")
|
||||
time.sleep_ms(10)
|
||||
self.display_on()
|
||||
|
||||
def set_full(self): # Normal full updates
|
||||
self.send_command(b"\x20")
|
||||
self.send_bytes(EPD_lut_vcom0)
|
||||
|
||||
self.send_command(b"\x21")
|
||||
self.send_bytes(EPD_lut_ww)
|
||||
|
||||
self.send_command(b"\x22")
|
||||
self.send_bytes(EPD_lut_bw)
|
||||
|
||||
self.send_command(b"\x23")
|
||||
self.send_bytes(EPD_lut_wb)
|
||||
|
||||
self.send_command(b"\x24")
|
||||
self.send_bytes(EPD_lut_bb)
|
||||
|
||||
def set_partial(self): # Partial updates
|
||||
self.send_command(b"\x20")
|
||||
self.send_bytes(EPD_partial_lut_vcom1)
|
||||
|
||||
self.send_command(b"\x21")
|
||||
self.send_bytes(EPD_partial_lut_ww1)
|
||||
|
||||
self.send_command(b"\x22")
|
||||
self.send_bytes(EPD_partial_lut_bw1)
|
||||
|
||||
self.send_command(b"\x23")
|
||||
self.send_bytes(EPD_partial_lut_wb1)
|
||||
|
||||
self.send_command(b"\x24")
|
||||
self.send_bytes(EPD_partial_lut_bb1)
|
||||
|
||||
def wait_until_ready(self):
|
||||
while not self.ready():
|
||||
time.sleep_ms(100)
|
||||
|
||||
async def wait(self):
|
||||
while not self.ready():
|
||||
await asyncio.sleep_ms(100)
|
||||
|
||||
# Pause until framebuf has been copied to device.
|
||||
async def updated(self):
|
||||
await self._updated.wait()
|
||||
|
||||
# For polling in asynchronous code. Just checks pin state.
|
||||
# 0 == busy. Comment in official code is wrong. Code is correct.
|
||||
def ready(self):
|
||||
return not(self._as_busy or (self.busy_pin() == 0)) # 0 == busy
|
||||
|
||||
def _line(self, n, buf=bytearray(_BWIDTH)):
|
||||
img = self.mvb
|
||||
s = n * _BWIDTH
|
||||
for x, b in enumerate(img[s : s + _BWIDTH]):
|
||||
buf[x] = b ^ 0xFF
|
||||
self.send_bytes(buf)
|
||||
|
||||
async def _as_show(self):
|
||||
self.send_command(b"\x13")
|
||||
for j in range(_EPD_HEIGHT): # Loop would block ~300ms
|
||||
self._line(j)
|
||||
await asyncio.sleep_ms(0)
|
||||
self.send_command(b"\x12") # Async .display_on()
|
||||
while not self.busy_pin():
|
||||
await asyncio.sleep_ms(10) # About 1.7s
|
||||
self._updated.set()
|
||||
self._updated.clear()
|
||||
self._as_busy = False
|
||||
|
||||
def show(self):
|
||||
if self._asyn:
|
||||
if self._as_busy:
|
||||
raise RuntimeError('Cannot refresh: display is busy.')
|
||||
self._as_busy = True # Immediate busy flag. Pin goes low much later.
|
||||
asyncio.create_task(self._as_show())
|
||||
return
|
||||
self.send_command(b"\x13")
|
||||
for j in range(_EPD_HEIGHT):
|
||||
self._line(j)
|
||||
self.display_on()
|
||||
self.wait_until_ready()
|
||||
|
||||
def sleep(self):
|
||||
# self.send_command(b"\x02") # power off
|
||||
# self.wait_until_ready()
|
||||
self.send_command(b"\x07") # deep sleep
|
||||
self.send_bytes(b"\xA5")
|
||||
Ładowanie…
Reference in New Issue