fix issue with 12.48" rendering

See #334 and #335 for more details

inkycal/display/drivers/epdconfig_12_in_48.py

@@ -31,6 +31,8 @@ import os
 import time
 from ctypes import *
 
+import RPi.GPIO as GPIO
+
 EPD_SCK_PIN = 11
 EPD_MOSI_PIN = 10
 
@@ -71,11 +73,11 @@ if spi is None:
 
 
 def digital_write(pin, value):
-    spi.DEV_Digital_Write(pin, value)
+    GPIO.output(pin, value)
 
 
 def digital_read(pin):
-    return spi.DEV_Digital_Read(pin)
+    return GPIO.input(pin)
 
 
 def spi_writebyte(value):
@@ -87,15 +89,68 @@ def delay_ms(delaytime):
 
 
 def module_init():
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setwarnings(False)
+    GPIO.setup(EPD_SCK_PIN, GPIO.OUT)
+    GPIO.setup(EPD_MOSI_PIN, GPIO.OUT)
+
+    logging.debug("python call bcm2835 Lib")
+
+    GPIO.setup(EPD_M2S2_RST_PIN, GPIO.OUT)
+    GPIO.setup(EPD_M1S1_RST_PIN, GPIO.OUT)
+    GPIO.setup(EPD_M2S2_DC_PIN, GPIO.OUT)
+    GPIO.setup(EPD_M1S1_DC_PIN, GPIO.OUT)
+    GPIO.setup(EPD_S1_CS_PIN, GPIO.OUT)
+    GPIO.setup(EPD_S2_CS_PIN, GPIO.OUT)
+    GPIO.setup(EPD_M1_CS_PIN, GPIO.OUT)
+    GPIO.setup(EPD_M2_CS_PIN, GPIO.OUT)
+
+    GPIO.setup(EPD_S1_BUSY_PIN, GPIO.IN)
+    GPIO.setup(EPD_S2_BUSY_PIN, GPIO.IN)
+    GPIO.setup(EPD_M1_BUSY_PIN, GPIO.IN)
+    GPIO.setup(EPD_M2_BUSY_PIN, GPIO.IN)
+
+    digital_write(EPD_M1_CS_PIN, 1)
+    digital_write(EPD_S1_CS_PIN, 1)
+    digital_write(EPD_M2_CS_PIN, 1)
+    digital_write(EPD_S2_CS_PIN, 1)
+
+    digital_write(EPD_M2S2_RST_PIN, 0)
+    digital_write(EPD_M1S1_RST_PIN, 0)
+    digital_write(EPD_M2S2_DC_PIN, 1)
+    digital_write(EPD_M1S1_DC_PIN, 1)
+
     spi.DEV_ModuleInit()
 
 
 def module_exit():
-    spi.DEV_ModuleExit()
+    digital_write(EPD_M2S2_RST_PIN, 0)
+    digital_write(EPD_M1S1_RST_PIN, 0)
+    digital_write(EPD_M2S2_DC_PIN, 0)
+    digital_write(EPD_M1S1_DC_PIN, 0)
+    digital_write(EPD_S1_CS_PIN, 1)
+    digital_write(EPD_S2_CS_PIN, 1)
+    digital_write(EPD_M1_CS_PIN, 1)
+    digital_write(EPD_M2_CS_PIN, 1)
 
 
 def spi_readbyte(Reg):
-    return spi.DEV_SPI_ReadByte(Reg)
+    GPIO.setup(EPD_MOSI_PIN, GPIO.IN)
+    j = 0
+    # time.sleep(0.01)
+    for i in range(0, 8):
+        GPIO.output(EPD_SCK_PIN, GPIO.LOW)
+        # time.sleep(0.01) 
+        j = j << 1
+        if (GPIO.input(EPD_MOSI_PIN) == GPIO.HIGH):
+            j |= 0x01
+        else:
+            j &= 0xfe
+            # time.sleep(0.01)
+        GPIO.output(EPD_SCK_PIN, GPIO.HIGH)
+        # time.sleep(0.01)  
+    GPIO.setup(EPD_MOSI_PIN, GPIO.OUT)
+    return j
 
 
 def delay_ms(delaytime):