add 2.7 b V2

Arduino/epd2in7b_V2/epdif.cpp

@@ -0,0 +1,64 @@
+/**
+ *  @filename   :   epdif.cpp
+ *  @brief      :   Implements EPD interface functions
+ *                  Users have to implement all the functions in epdif.cpp
+ *  @author     :   Yehui from Waveshare
+ *
+ *  Copyright (C) Waveshare     August 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.
+ */
+
+#include "epdif.h"
+#include <SPI.h>
+
+EpdIf::EpdIf() {
+};
+
+EpdIf::~EpdIf() {
+};
+
+void EpdIf::DigitalWrite(int pin, int value) {
+    digitalWrite(pin, value);
+}
+
+int EpdIf::DigitalRead(int pin) {
+    return digitalRead(pin);
+}
+
+void EpdIf::DelayMs(unsigned int delaytime) {
+    delay(delaytime);
+}
+
+void EpdIf::SpiTransfer(unsigned char data) {
+    digitalWrite(CS_PIN, LOW);
+    SPI.transfer(data);
+    digitalWrite(CS_PIN, HIGH);
+}
+
+int EpdIf::IfInit(void) {
+    pinMode(CS_PIN, OUTPUT);
+    pinMode(RST_PIN, OUTPUT);
+    pinMode(DC_PIN, OUTPUT);
+    pinMode(BUSY_PIN, INPUT); 
+    SPI.begin();
+    SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));
+    return 0;
+}
+