2020.05.22

Arduino/epd2in13b_V2/epd2in13b_V2.cpp

@@ -0,0 +1,208 @@
+/**
+ *  @filename   :   epd2in9b.cpp
+ *  @brief      :   Implements for Dual-color e-paper library
+ *  @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 <stdlib.h>
+#include "epd2in13b_V2.h"
+
+Epd::~Epd() {
+};
+
+Epd::Epd() {
+    reset_pin = RST_PIN;
+    dc_pin = DC_PIN;
+    cs_pin = CS_PIN;
+    busy_pin = BUSY_PIN;
+    width = EPD_WIDTH;
+    height = EPD_HEIGHT;
+};
+
+int Epd::Init(void) {
+    /* this calls the peripheral hardware interface, see epdif */
+    if (IfInit() != 0) {
+        return -1;
+    }
+    /* EPD hardware init start */
+    Reset();
+    
+    SendCommand(0x04);  
+    WaitUntilIdle();//waiting for the electronic paper IC to release the idle signal
+
+    SendCommand(0x00);//panel setting
+    SendData(0x0f);//LUT from OTP，128x296
+    SendData(0x89);//Temperature sensor, boost and other related timing settings
+
+    SendCommand(0x61);//resolution setting
+    SendData (0x68);
+    SendData (0x00);
+    SendData (0xD4);
+
+    SendCommand(0X50);//VCOM AND DATA INTERVAL SETTING
+    SendData(0x77);//WBmode:VBDF 17|D7 VBDW 97 VBDB 57
+                                 //WBRmode:VBDF F7 VBDW 77 VBDB 37  VBDR B7;
+    return 0;
+
+}
+
+/**
+ *  @brief: basic function for sending commands
+ */
+void Epd::SendCommand(unsigned char command) {
+    DigitalWrite(dc_pin, LOW);
+    SpiTransfer(command);
+}
+
+/**
+ *  @brief: basic function for sending data
+ */
+void Epd::SendData(unsigned char data) {
+    DigitalWrite(dc_pin, HIGH);
+    SpiTransfer(data);
+}
+
+/**
+ *  @brief: Wait until the busy_pin goes HIGH
+ */
+void Epd::WaitUntilIdle(void) {
+    SendCommand(0x71);
+    while(DigitalRead(busy_pin) == 0) {      //0: busy, 1: idle
+        SendCommand(0x71);
+        DelayMs(50);
+    }
+    DelayMs(200);
+}
+
+/**
+ *  @brief: module reset. 
+ *          often used to awaken the module in deep sleep, 
+ *          see Epd::Sleep();
+ */
+void Epd::Reset(void) {
+    DigitalWrite(reset_pin, HIGH);
+    DelayMs(200);  
+    DigitalWrite(reset_pin, LOW);
+    DelayMs(10);
+    DigitalWrite(reset_pin, HIGH);
+    DelayMs(200); 
+    this->count = 0;    
+}
+
+
+/**
+ * @brief: refresh and displays the frame
+ */
+void Epd::DisplayFrame(const unsigned char* frame_buffer_black, const unsigned char* frame_buffer_red) {
+    if (frame_buffer_black != NULL) {
+        SendCommand(0x10);
+        for (int i = 0; i < this->width * this->height / 8; i++) {
+            SendData(pgm_read_byte(&frame_buffer_black[i]));
+        }
+        DelayMs(2);
+    }
+    if (frame_buffer_red != NULL) {
+        SendCommand(0x13);
+        for (int i = 0; i < this->width * this->height / 8; i++) {
+            SendData(pgm_read_byte(&frame_buffer_red[i]));
+        }
+        
+    }
+    SendCommand(0x12);
+    DelayMs(100);
+    WaitUntilIdle();
+    this->count = 0;
+}
+
+void Epd::Display(const unsigned char* frame_buffer) {
+    // 1378
+    if(this->count == 0){
+        SendCommand(0x10);
+        this->count++;
+    }else if(this->count > 0 && this->count < 4 ){
+        this->count++;
+    }else if(this->count == 4){
+        SendCommand(0x13);
+        this->count++;
+    }else if(this->count > 4 && this->count < 8 ){
+        this->count++;
+    }
+    for(int i = 0; i < this->width * this->height / 8 / 4; i++){
+            SendData(frame_buffer[i]);
+    }
+    if(this->count == 8){
+        SendCommand(0x12);
+        DelayMs(100);
+        WaitUntilIdle();
+        this->count = 0;
+    }
+}
+
+/**
+ * @brief: clear the frame data from the SRAM, this won't refresh the display
+ */
+void Epd::ClearFrame(void) {
+    SendCommand(0x10);           
+    for(int i = 0; i < width * height / 8; i++) {
+        SendData(0xFF);  
+    }  
+    DelayMs(2);
+    SendCommand(0x13);
+    for(int i = 0; i < width * height / 8; i++) {
+        SendData(0xFF);  
+    }
+    SendCommand(0x12);
+    DelayMs(100);
+    WaitUntilIdle();
+    this->count = 0;
+}
+
+/**
+ * @brief: This displays the frame data from SRAM
+ */
+void Epd::DisplayFrame(void) {
+    this->count = 0;
+    SendCommand(0x12);
+    DelayMs(100);    
+    WaitUntilIdle();
+    
+}
+
+/**
+ * @brief: After this command is transmitted, the chip would enter the deep-sleep mode to save power. 
+ *         The deep sleep mode would return to standby by hardware reset. The only one parameter is a 
+ *         check code, the command would be executed if check code = 0xA5. 
+ *         You can use Epd::Reset() to awaken and use Epd::Init() to initialize.
+ */
+void Epd::Sleep() {
+    SendCommand(0X50);
+    SendData(0xf7);
+    SendCommand(0X02);//power off
+    WaitUntilIdle();//waiting for the electronic paper IC to release the idle signal
+    SendCommand(0X07);//deep sleep
+    SendData(0xA5);
+    this->count = 0;
+}
+
+
+/* END OF FILE */