/*****************************************************************************
* | File      	:   EPD_1in54_V2.c
* | Author      :   Waveshare team
* | Function    :   1.54inch e-paper V2
* | Info        :
*----------------
* |	This version:   V1.0
* | Date        :   2019-06-11
* | 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 "EPD_1in54_V2.h"
#include "Debug.h"

/******************************************************************************
function :	Software reset
parameter:
******************************************************************************/
static void EPD_1IN54_V2_Reset(void)
{
    DEV_Digital_Write(EPD_RST_PIN, 1);
    DEV_Delay_ms(200);
    DEV_Digital_Write(EPD_RST_PIN, 0);
    DEV_Delay_ms(10);
    DEV_Digital_Write(EPD_RST_PIN, 1);
    DEV_Delay_ms(200);
}

/******************************************************************************
function :	send command
parameter:
     Reg : Command register
******************************************************************************/
static void EPD_1IN54_V2_SendCommand(UBYTE Reg)
{
    DEV_Digital_Write(EPD_DC_PIN, 0);
    DEV_Digital_Write(EPD_CS_PIN, 0);
    DEV_SPI_WriteByte(Reg);
    DEV_Digital_Write(EPD_CS_PIN, 1);
}

/******************************************************************************
function :	send data
parameter:
    Data : Write data
******************************************************************************/
static void EPD_1IN54_V2_SendData(UBYTE Data)
{
    DEV_Digital_Write(EPD_DC_PIN, 1);
    DEV_Digital_Write(EPD_CS_PIN, 0);
    DEV_SPI_WriteByte(Data);
    DEV_Digital_Write(EPD_CS_PIN, 1);
}

/******************************************************************************
function :	Wait until the busy_pin goes LOW
parameter:
******************************************************************************/
static void EPD_1IN54_V2_ReadBusy(void)
{
    Debug("e-Paper busy\r\n");
    // UBYTE busy;
    // do {
        // EPD_1IN54_V2_SendCommand(0x71);
        // busy = DEV_Digital_Read(EPD_BUSY_PIN);
        // busy = !(busy & 0x01);
    // } while(busy);
    // DEV_Delay_ms(200);
    while(DEV_Digital_Read(EPD_BUSY_PIN) == 1) {      //LOW: idle, HIGH: busy
        DEV_Delay_ms(20);
    }
    Debug("e-Paper busy release\r\n");
}

/******************************************************************************
function :	Turn On Display full
parameter:
******************************************************************************/
static void EPD_1IN54_V2_TurnOnDisplay(void)
{
    EPD_1IN54_V2_SendCommand(0x22);
    EPD_1IN54_V2_SendData(0xF7);
    EPD_1IN54_V2_SendCommand(0x20);
    EPD_1IN54_V2_ReadBusy();
}

/******************************************************************************
function :	Turn On Display part
parameter:
******************************************************************************/
static void EPD_1IN54_V2_TurnOnDisplayPart(void)
{
    EPD_1IN54_V2_SendCommand(0x22);
    EPD_1IN54_V2_SendData(0xFF);
    EPD_1IN54_V2_SendCommand(0x20);
    EPD_1IN54_V2_ReadBusy();
}

/******************************************************************************
function :	Initialize the e-Paper register
parameter:
******************************************************************************/
void EPD_1IN54_V2_Init(void)
{
    EPD_1IN54_V2_Reset();

    EPD_1IN54_V2_ReadBusy();
    EPD_1IN54_V2_SendCommand(0x12);  //SWRESET
    EPD_1IN54_V2_ReadBusy();

    EPD_1IN54_V2_SendCommand(0x01); //Driver output control
    EPD_1IN54_V2_SendData(0xC7);
    EPD_1IN54_V2_SendData(0x00);
    EPD_1IN54_V2_SendData(0x01);

    EPD_1IN54_V2_SendCommand(0x11); //data entry mode
    EPD_1IN54_V2_SendData(0x01);

    EPD_1IN54_V2_SendCommand(0x44); //set Ram-X address start/end position
    EPD_1IN54_V2_SendData(0x00);
    EPD_1IN54_V2_SendData(0x18);    //0x0C-->(18+1)*8=200

    EPD_1IN54_V2_SendCommand(0x45); //set Ram-Y address start/end position
    EPD_1IN54_V2_SendData(0xC7);   //0xC7-->(199+1)=200
    EPD_1IN54_V2_SendData(0x00);
    EPD_1IN54_V2_SendData(0x00);
    EPD_1IN54_V2_SendData(0x00);

    EPD_1IN54_V2_SendCommand(0x3C); //BorderWavefrom
    EPD_1IN54_V2_SendData(0x01);

    EPD_1IN54_V2_SendCommand(0x18);
    EPD_1IN54_V2_SendData(0x80);

    EPD_1IN54_V2_SendCommand(0x22); // //Load Temperature and waveform setting.
    EPD_1IN54_V2_SendData(0XB1);
    EPD_1IN54_V2_SendCommand(0x20);

    EPD_1IN54_V2_SendCommand(0x4E);   // set RAM x address count to 0;
    EPD_1IN54_V2_SendData(0x00);
    EPD_1IN54_V2_SendCommand(0x4F);   // set RAM y address count to 0X199;
    EPD_1IN54_V2_SendData(0xC7);
    EPD_1IN54_V2_SendData(0x00);
    EPD_1IN54_V2_ReadBusy();
}

/******************************************************************************
function :	Clear screen
parameter:
******************************************************************************/
void EPD_1IN54_V2_Clear(void)
{
    UWORD Width, Height;
    Width = (EPD_1IN54_V2_WIDTH % 8 == 0)? (EPD_1IN54_V2_WIDTH / 8 ): (EPD_1IN54_V2_WIDTH / 8 + 1);
    Height = EPD_1IN54_V2_HEIGHT;

    EPD_1IN54_V2_SendCommand(0x24);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            EPD_1IN54_V2_SendData(0XFF);
        }
    }
    EPD_1IN54_V2_TurnOnDisplay();
}

/******************************************************************************
function :	Sends the image buffer in RAM to e-Paper and displays
parameter:
******************************************************************************/
void EPD_1IN54_V2_Display(UBYTE *Image)
{
    UWORD Width, Height;
    Width = (EPD_1IN54_V2_WIDTH % 8 == 0)? (EPD_1IN54_V2_WIDTH / 8 ): (EPD_1IN54_V2_WIDTH / 8 + 1);
    Height = EPD_1IN54_V2_HEIGHT;

    UDOUBLE Addr = 0;
    EPD_1IN54_V2_SendCommand(0x24);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            Addr = i + j * Width;
            EPD_1IN54_V2_SendData(Image[Addr]);
        }
    }
    EPD_1IN54_V2_TurnOnDisplay();
}

/******************************************************************************
function :	 The image of the previous frame must be uploaded, otherwise the
		         first few seconds will display an exception.
parameter:
******************************************************************************/
void EPD_1IN54_V2_DisplayPartBaseImage(UBYTE *Image)
{
    UWORD Width, Height;
    Width = (EPD_1IN54_V2_WIDTH % 8 == 0)? (EPD_1IN54_V2_WIDTH / 8 ): (EPD_1IN54_V2_WIDTH / 8 + 1);
    Height = EPD_1IN54_V2_HEIGHT;

    UDOUBLE Addr = 0;
    EPD_1IN54_V2_SendCommand(0x24);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            Addr = i + j * Width;
            EPD_1IN54_V2_SendData(Image[Addr]);
        }
    }
    EPD_1IN54_V2_SendCommand(0x26);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            Addr = i + j * Width;
            EPD_1IN54_V2_SendData(Image[Addr]);
        }
    }
    EPD_1IN54_V2_TurnOnDisplayPart();
}

/******************************************************************************
function :	Sends the image buffer in RAM to e-Paper and displays
parameter:
******************************************************************************/
void EPD_1IN54_V2_DisplayPart(UBYTE *Image)
{
    UWORD Width, Height;
    Width = (EPD_1IN54_V2_WIDTH % 8 == 0)? (EPD_1IN54_V2_WIDTH / 8 ): (EPD_1IN54_V2_WIDTH / 8 + 1);
    Height = EPD_1IN54_V2_HEIGHT;

    UDOUBLE Addr = 0;
    EPD_1IN54_V2_SendCommand(0x24);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            Addr = i + j * Width;
            EPD_1IN54_V2_SendData(Image[Addr]);
        }
    }
    EPD_1IN54_V2_TurnOnDisplayPart();
}
/******************************************************************************
function :	Enter sleep mode
parameter:
******************************************************************************/
void EPD_1IN54_V2_Sleep(void)
{
    EPD_1IN54_V2_SendCommand(0x10); //enter deep sleep
    EPD_1IN54_V2_SendData(0x01);
    DEV_Delay_ms(100);
}