/*****************************************************************************
* | File      	:   epd1in54_V2.cpp
* | Author      :   Waveshare team
* | Function    :   1.54inch e-paper V2
* | Info        :
*----------------
* |	This version:   V1.0
* | Date        :   2019-06-24
* | Info        :
#
# 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 "epd1in54_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;
};

/**
 *  @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)
{
    while(DigitalRead(busy_pin) == 1) {      //LOW: idle, HIGH: busy
        DelayMs(100);
    }
    DelayMs(200);
}

int Epd::Init(void)
{
    /* this calls the peripheral hardware interface, see epdif */
    if (IfInit() != 0) {
        return -1;
    }
    /* EPD hardware init start */
    Reset();

    WaitUntilIdle();
    SendCommand(0x12);  //SWRESET
    WaitUntilIdle();

    SendCommand(0x01); //Driver output control
    SendData(0xC7);
    SendData(0x00);
    SendData(0x01);

    SendCommand(0x11); //data entry mode
    SendData(0x01);

    SendCommand(0x44); //set Ram-X address start/end position
    SendData(0x00);
    SendData(0x18);    //0x0C-->(18+1)*8=200

    SendCommand(0x45); //set Ram-Y address start/end position
    SendData(0xC7);   //0xC7-->(199+1)=200
    SendData(0x00);
    SendData(0x00);
    SendData(0x00);

    SendCommand(0x3C); //BorderWavefrom
    SendData(0x01);

    SendCommand(0x18);
    SendData(0x80);

    SendCommand(0x22); // //Load Temperature and waveform setting.
    SendData(0XB1);
    SendCommand(0x20);

    SendCommand(0x4E);   // set RAM x address count to 0;
    SendData(0x00);
    SendCommand(0x4F);   // set RAM y address count to 0X199;
    SendData(0xC7);
    SendData(0x00);
    WaitUntilIdle();
    /* EPD hardware init end */

    return 0;
}

/**
 *  @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);                //module reset
    DelayMs(10);
    DigitalWrite(reset_pin, HIGH);
    DelayMs(200);
}

void Epd::Clear(void)
{
    int w, h;
    w = (EPD_WIDTH % 8 == 0)? (EPD_WIDTH / 8 ): (EPD_WIDTH / 8 + 1);
    h = EPD_HEIGHT;
    SendCommand(0x24);
    for (int j = 0; j < h; j++) {
        for (int i = 0; i < w; i++) {
            SendData(0xff);
        }
    }

    //DISPLAY REFRESH
    SendCommand(0x22);
    SendData(0xF7);
    SendCommand(0x20);
    WaitUntilIdle();
}

void Epd::Display(const unsigned char* frame_buffer)
{
    int w = (EPD_WIDTH % 8 == 0)? (EPD_WIDTH / 8 ): (EPD_WIDTH / 8 + 1);
    int h = EPD_HEIGHT;

    if (frame_buffer != NULL) {
        SendCommand(0x24);
        for (int j = 0; j < h; j++) {
            for (int i = 0; i < w; i++) {
                SendData(pgm_read_byte(&frame_buffer[i + j * w]));
            }
        }
    }

    //DISPLAY REFRESH
    SendCommand(0x22);
    SendData(0xF7);
    SendCommand(0x20);
    WaitUntilIdle();
}

void Epd::DisplayPartBaseImage(const unsigned char* frame_buffer)
{
    int w = (EPD_WIDTH % 8 == 0)? (EPD_WIDTH / 8 ): (EPD_WIDTH / 8 + 1);
    int h = EPD_HEIGHT;

    if (frame_buffer != NULL) {
        SendCommand(0x24);
        for (int j = 0; j < h; j++) {
            for (int i = 0; i < w; i++) {
                SendData(frame_buffer[i + j * w]);
            }
        }

        SendCommand(0x26);
        for (int j = 0; j < h; j++) {
            for (int i = 0; i < w; i++) {
                SendData(frame_buffer[i + j * w]);
            }
        }
    }

    //DISPLAY REFRESH
    SendCommand(0x22);
    SendData(0xFF);
    SendCommand(0x20);
    WaitUntilIdle();
}

void Epd::DisplayPart(const unsigned char* frame_buffer)
{
    int w = (EPD_WIDTH % 8 == 0)? (EPD_WIDTH / 8 ): (EPD_WIDTH / 8 + 1);
    int h = EPD_HEIGHT;

    if (frame_buffer != NULL) {
        SendCommand(0x24);
        for (int j = 0; j < h; j++) {
            for (int i = 0; i < w; i++) {
                SendData(frame_buffer[i + j * w]);
            }
        }
    }

    //DISPLAY REFRESH
    SendCommand(0x22);
    SendData(0xFF);
    SendCommand(0x20);
    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::Init() to awaken
 */
void Epd::Sleep()
{
    SendCommand(0x10); //enter deep sleep
    SendData(0x01);
    DelayMs(200);

    DigitalWrite(reset_pin, LOW);
}

/* END OF FILE */