Added support for more E-Paper displays

modules/drivers/epd_4_in_2_colour.py

@@ -0,0 +1,148 @@
+# *****************************************************************************
+# * | File        :	  epd4in2bc.py
+# * | Author      :   Waveshare team
+# * | Function    :   Electronic paper driver
+# * | Info        :
+# *----------------
+# * | This version:   V4.0
+# * | Date        :   2019-06-20
+# # | Info        :   python demo
+# -----------------------------------------------------------------------------
+# 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:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# 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.
+#
+
+import logging
+from . import epdconfig
+
+# Display resolution
+EPD_WIDTH       = 400
+EPD_HEIGHT      = 300
+
+class EPD:
+    def __init__(self):
+        self.reset_pin = epdconfig.RST_PIN
+        self.dc_pin = epdconfig.DC_PIN
+        self.busy_pin = epdconfig.BUSY_PIN
+        self.cs_pin = epdconfig.CS_PIN
+        self.width = EPD_WIDTH
+        self.height = EPD_HEIGHT
+
+    # Hardware reset
+    def reset(self):
+        epdconfig.digital_write(self.reset_pin, 1)
+        epdconfig.delay_ms(200) 
+        epdconfig.digital_write(self.reset_pin, 0)
+        epdconfig.delay_ms(10)
+        epdconfig.digital_write(self.reset_pin, 1)
+        epdconfig.delay_ms(200)   
+
+    def send_command(self, command):
+        epdconfig.digital_write(self.dc_pin, 0)
+        epdconfig.digital_write(self.cs_pin, 0)
+        epdconfig.spi_writebyte([command])
+        epdconfig.digital_write(self.cs_pin, 1)
+
+    def send_data(self, data):
+        epdconfig.digital_write(self.dc_pin, 1)
+        epdconfig.digital_write(self.cs_pin, 0)
+        epdconfig.spi_writebyte([data])
+        epdconfig.digital_write(self.cs_pin, 1)
+        
+    def ReadBusy(self):
+        logging.debug("e-Paper busy")
+        while(epdconfig.digital_read(self.busy_pin) == 0): # 0: idle, 1: busy
+            epdconfig.delay_ms(100)
+        logging.debug("e-Paper busy release")
+            
+    def init(self):
+        if (epdconfig.module_init() != 0):
+            return -1
+            
+        self.reset()
+
+        self.send_command(0x06) # BOOSTER_SOFT_START
+        self.send_data (0x17)
+        self.send_data (0x17)
+        self.send_data (0x17) # 07 0f 17 1f 27 2F 37 2f
+        
+        self.send_command(0x04) # POWER_ON
+        self.ReadBusy()
+        
+        self.send_command(0x00) # PANEL_SETTING
+        self.send_data(0x0F) # LUT from OTP
+        
+        return 0
+
+    def getbuffer(self, image):
+        # logging.debug("bufsiz = ",int(self.width/8) * self.height)
+        buf = [0xFF] * (int(self.width/8) * self.height)
+        image_monocolor = image.convert('1')
+        imwidth, imheight = image_monocolor.size
+        pixels = image_monocolor.load()
+        # logging.debug("imwidth = %d, imheight = %d",imwidth,imheight)
+        if(imwidth == self.width and imheight == self.height):
+            logging.debug("Horizontal")
+            for y in range(imheight):
+                for x in range(imwidth):
+                    # Set the bits for the column of pixels at the current position.
+                    if pixels[x, y] == 0:
+                        buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8))
+        elif(imwidth == self.height and imheight == self.width):
+            logging.debug("Vertical")
+            for y in range(imheight):
+                for x in range(imwidth):
+                    newx = y
+                    newy = self.height - x - 1
+                    if pixels[x, y] == 0:
+                        buf[int((newx + newy*self.width) / 8)] &= ~(0x80 >> (y % 8))
+        return buf
+
+    def display(self, imageblack, imagered):
+        self.send_command(0x10)
+        for i in range(0, int(self.width * self.height / 8)):
+            self.send_data(imageblack[i])
+        
+        self.send_command(0x13)
+        for i in range(0, int(self.width * self.height / 8)):
+            self.send_data(imagered[i])
+        
+        self.send_command(0x12) 
+        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(0x13)
+        for i in range(0, int(self.width * self.height / 8)):
+            self.send_data(0xFF)
+        
+        self.send_command(0x12) 
+        self.ReadBusy()
+
+    def sleep(self):
+        self.send_command(0x02) # POWER_OFF
+        self.ReadBusy()
+        self.send_command(0x07) # DEEP_SLEEP
+        self.send_data(0xA5) # check code
+        
+        epdconfig.module_exit()
+### END OF FILE ###
+