Merge pull request #362 from python273/add-non-blocking-screen-updating

Add non blocking display updating

pwnagotchi/ui/display.py

@@ -1,7 +1,8 @@
 import os
 import logging
-import pwnagotchi.plugins as plugins
+import threading
 
+import pwnagotchi.plugins as plugins
 import pwnagotchi.ui.hw as hw
 import pwnagotchi.ui.web as web
 from pwnagotchi.ui.view import View
@@ -18,6 +19,14 @@ class Display(View):
 
         self.init_display()
 
+        self._canvas_next_event = threading.Event()
+        self._canvas_next = None
+        self._render_thread_instance = threading.Thread(
+            target=self._render_thread,
+            daemon=True
+        )
+        self._render_thread_instance.start()
+
     def is_inky(self):
         return self._implementation.name == 'inky'
 
@@ -59,6 +68,14 @@ class Display(View):
             img = self._canvas if self._rotation == 0 else self._canvas.rotate(-self._rotation)
         return img
 
+    def _render_thread(self):
+        """Used for non-blocking screen updating."""
+
+        while True:
+            self._canvas_next_event.wait()
+            self._canvas_next_event.clear()
+            self._implementation.render(self._canvas_next)
+
     def _on_view_rendered(self, img):
         web.update_frame(img)
         try:
@@ -70,4 +87,5 @@ class Display(View):
         if self._enabled:
             self._canvas = (img if self._rotation == 0 else img.rotate(self._rotation))
             if self._implementation is not None:
-                self._implementation.render(self._canvas)
+                self._canvas_next = self._canvas
+                self._canvas_next_event.set()

pwnagotchi/ui/hw/libs/waveshare/v1/epd2in13bc.py

@@ -47,11 +47,11 @@ class EPD:
     # Hardware reset
     def reset(self):
         epdconfig.digital_write(self.reset_pin, GPIO.HIGH)
-        epdconfig.delay_ms(200) 
+        epdconfig.delay_ms(200)
         epdconfig.digital_write(self.reset_pin, GPIO.LOW)         # module reset
         epdconfig.delay_ms(200)
         epdconfig.digital_write(self.reset_pin, GPIO.HIGH)
-        epdconfig.delay_ms(200)   
+        epdconfig.delay_ms(200)
 
     def send_command(self, command):
         epdconfig.digital_write(self.dc_pin, GPIO.LOW)
@@ -64,8 +64,9 @@ class EPD:
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
         epdconfig.spi_writebyte([data])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
-        
+
     def ReadBusy(self):
+        epdconfig.delay_ms(20)
         while(epdconfig.digital_read(self.busy_pin) == 0):      # 0: idle, 1: busy
             epdconfig.delay_ms(100)
 
@@ -79,16 +80,16 @@ class EPD:
         self.send_data(0x17)
         self.send_data(0x17)
         self.send_data(0x17)
-        
+
         self.send_command(0x04) # POWER_ON
         self.ReadBusy()
-        
+
         self.send_command(0x00) # PANEL_SETTING
         self.send_data(0x8F)
-        
+
         self.send_command(0x50) # VCOM_AND_DATA_INTERVAL_SETTING
         self.send_data(0xF0)
-        
+
         self.send_command(0x61) # RESOLUTION_SETTING
         self.send_data(self.width & 0xff)
         self.send_data(self.height >> 8)
@@ -120,7 +121,7 @@ class EPD:
         for i in range(0, int(self.width * self.height / 8)):
             self.send_data(imageblack[i])
         self.send_command(0x92)
-        
+
         self.send_command(0x12) # REFRESH
         self.ReadBusy()
 
@@ -129,26 +130,26 @@ class EPD:
         for i in range(0, int(self.width * self.height / 8)):
             self.send_data(imageblack[i])
         self.send_command(0x92)
-        
+
         self.send_command(0x13)
         for i in range(0, int(self.width * self.height / 8)):
             self.send_data(imagecolor[i])
         self.send_command(0x92)
-        
+
         self.send_command(0x12) # REFRESH
         self.ReadBusy()
-        
+
     def Clear(self):
         self.send_command(0x10)
         for i in range(0, int(self.width * self.height / 8)):
             self.send_data(0xFF)
-        self.send_command(0x92) 
+        self.send_command(0x92)
-        
+
         self.send_command(0x13)
         for i in range(0, int(self.width * self.height / 8)):
             self.send_data(0xFF)
         self.send_command(0x92)
-        
+
         self.send_command(0x12) # REFRESH
         self.ReadBusy()
 
@@ -157,7 +158,7 @@ class EPD:
         self.ReadBusy()
         self.send_command(0x07) # DEEP_SLEEP
         self.send_data(0xA5) # check code
-        
+
 #        epdconfig.module_exit()
 ### END OF FILE ###