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Calendar/epdif.py

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+##
+ #  @filename   :   epdif.py
+ #  @brief      :   EPD hardware interface implements (GPIO, SPI)
+ #  @author     :   Yehui from Waveshare
+ #
+ #  Copyright (C) Waveshare     July 10 2017
+ #
+ # 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 spidev
+import RPi.GPIO as GPIO
+import time
+
+# Pin definition
+RST_PIN         = 17
+DC_PIN          = 25
+CS_PIN          = 8
+BUSY_PIN        = 24
+
+# SPI device, bus = 0, device = 0
+SPI = spidev.SpiDev(0, 0)
+#SPI.no_cs = True
+
+def epd_digital_write(pin, value):
+    GPIO.output(pin, value)
+
+def epd_digital_read(pin):
+    return GPIO.input(BUSY_PIN)
+
+def epd_delay_ms(delaytime):
+    time.sleep(delaytime / 1000.0)
+
+def spi_transfer(data):
+    SPI.writebytes(data)
+
+def epd_init():
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setwarnings(False)
+    GPIO.setup(RST_PIN, GPIO.OUT)
+    GPIO.setup(DC_PIN, GPIO.OUT)
+    GPIO.setup(CS_PIN, GPIO.OUT)
+    GPIO.setup(BUSY_PIN, GPIO.IN)
+    SPI.max_speed_hz = 6250000 #was 2000000
+    SPI.mode = 0b00 #was 0b00
+    return 0;
+
+### END OF FILE ###