/*****************************************************************************
* | File      	:	EPD_7IN5B_HD.c
* | Author      :   Waveshare team
* | Function    :   Electronic paper driver
* | Info        :
*----------------
* |	This version:   V1.0
* | Date        :   2020-04-27
* | 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_7in5b_HD.h"
#include "Debug.h"

/******************************************************************************
function :	Software reset
parameter:
******************************************************************************/
static void EPD_7IN5B_HD_Reset(void)
{
    DEV_Digital_Write(EPD_RST_PIN, 1);
    DEV_Delay_ms(200);
    DEV_Digital_Write(EPD_RST_PIN, 0);
    DEV_Delay_ms(2);
    DEV_Digital_Write(EPD_RST_PIN, 1);
    DEV_Delay_ms(200);
}

/******************************************************************************
function :	send command
parameter:
     Reg : Command register
******************************************************************************/
static void EPD_7IN5B_HD_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_7IN5B_HD_SendData(UBYTE Data)
{
    
    DEV_Digital_Write(EPD_CS_PIN, 0);
    DEV_Digital_Write(EPD_DC_PIN, 1);
    DEV_SPI_WriteByte(Data);
    DEV_Digital_Write(EPD_CS_PIN, 1);
}

/******************************************************************************
function :	Wait until the busy_pin goes LOW
parameter:
******************************************************************************/
void EPD_7IN5B_HD_WaitUntilIdle(void)
{
    Debug("e-Paper busy\r\n");
    while(DEV_Digital_Read(EPD_BUSY_PIN)){
        DEV_Delay_ms(10);
    }
    DEV_Delay_ms(200);      
    Debug("e-Paper busy release\r\n");
}


/******************************************************************************
function :	Turn On Display
parameter:
******************************************************************************/
static void EPD_7IN5B_HD_TurnOnDisplay(void)
{
    EPD_7IN5B_HD_SendCommand(0x22);
    EPD_7IN5B_HD_SendData(0xC7);    //Load LUT from MCU(0x32)
    EPD_7IN5B_HD_SendCommand(0x20);
    DEV_Delay_ms(200);      //!!!The delay here is necessary, 200uS at least!!!     
    EPD_7IN5B_HD_WaitUntilIdle();       //waiting for the electronic paper IC to release the idle signal
}

/******************************************************************************
function :	Initialize the e-Paper register
parameter:
******************************************************************************/
UBYTE EPD_7IN5B_HD_Init(void)
{
    EPD_7IN5B_HD_Reset();

    EPD_7IN5B_HD_SendCommand(0x12); 		  //SWRESET
    EPD_7IN5B_HD_WaitUntilIdle();        //waiting for the electronic paper IC to release the idle signal

    EPD_7IN5B_HD_SendCommand(0x46);  // Auto Write RAM
    EPD_7IN5B_HD_SendData(0xF7);
    EPD_7IN5B_HD_WaitUntilIdle();        //waiting for the electronic paper IC to release the idle signal

    EPD_7IN5B_HD_SendCommand(0x47);  // Auto Write RAM
    EPD_7IN5B_HD_SendData(0xF7);
    EPD_7IN5B_HD_WaitUntilIdle();        //waiting for the electronic paper IC to release the idle signal

    EPD_7IN5B_HD_SendCommand(0x0C);  // Soft start setting
    EPD_7IN5B_HD_SendData(0xAE);
    EPD_7IN5B_HD_SendData(0xC7);
    EPD_7IN5B_HD_SendData(0xC3);
    EPD_7IN5B_HD_SendData(0xC0);
    EPD_7IN5B_HD_SendData(0x40);   

    EPD_7IN5B_HD_SendCommand(0x01);  // Set MUX as 527
    EPD_7IN5B_HD_SendData(0xAF);
    EPD_7IN5B_HD_SendData(0x02);
    EPD_7IN5B_HD_SendData(0x01);

    EPD_7IN5B_HD_SendCommand(0x11);  // Data entry mode
    EPD_7IN5B_HD_SendData(0x01);

    EPD_7IN5B_HD_SendCommand(0x44);
    EPD_7IN5B_HD_SendData(0x00); // RAM x address start at 0
    EPD_7IN5B_HD_SendData(0x00);
    EPD_7IN5B_HD_SendData(0x6F); // RAM x address end at 36Fh -> 879
    EPD_7IN5B_HD_SendData(0x03);
    EPD_7IN5B_HD_SendCommand(0x45);
    EPD_7IN5B_HD_SendData(0xAF); // RAM y address start at 20Fh;
    EPD_7IN5B_HD_SendData(0x02);
    EPD_7IN5B_HD_SendData(0x00); // RAM y address end at 00h;
    EPD_7IN5B_HD_SendData(0x00);

    EPD_7IN5B_HD_SendCommand(0x3C); // VBD
    EPD_7IN5B_HD_SendData(0x01); // LUT1, for white

    EPD_7IN5B_HD_SendCommand(0x18);
    EPD_7IN5B_HD_SendData(0X80);
    EPD_7IN5B_HD_SendCommand(0x22);
    EPD_7IN5B_HD_SendData(0XB1);	//Load Temperature and waveform setting.
    EPD_7IN5B_HD_SendCommand(0x20);
    EPD_7IN5B_HD_WaitUntilIdle();        //waiting for the electronic paper IC to release the idle signal

    EPD_7IN5B_HD_SendCommand(0x4E); 
    EPD_7IN5B_HD_SendData(0x00);
    EPD_7IN5B_HD_SendData(0x00);
    EPD_7IN5B_HD_SendCommand(0x4F); 
    EPD_7IN5B_HD_SendData(0xAF);
    EPD_7IN5B_HD_SendData(0x02);
    return 0;
}

/******************************************************************************
function :	Clear screen
parameter:
******************************************************************************/
void EPD_7IN5B_HD_Clear(void)
{
    UWORD Width, Height;
    Width =(EPD_7IN5B_HD_WIDTH % 8 == 0)?(EPD_7IN5B_HD_WIDTH / 8 ):(EPD_7IN5B_HD_WIDTH / 8 + 1);
    Height = EPD_7IN5B_HD_HEIGHT;
    EPD_7IN5B_HD_SendCommand(0x4F); 
    EPD_7IN5B_HD_SendData(0xAf);
    EPD_7IN5B_HD_SendData(0x02);
    UWORD i;
    EPD_7IN5B_HD_SendCommand(0x24);
    for(i=0; i<Width*Height; i++) {
        EPD_7IN5B_HD_SendData(0xff);

    }
    EPD_7IN5B_HD_SendCommand(0x26);
    for(i=0; i<Width*Height; i++)	{
        EPD_7IN5B_HD_SendData(0x00);

    }
    EPD_7IN5B_HD_TurnOnDisplay();
}

void EPD_7IN5B_HD_ClearRed(void)
{
    UWORD Width, Height;
    Width =(EPD_7IN5B_HD_WIDTH % 8 == 0)?(EPD_7IN5B_HD_WIDTH / 8 ):(EPD_7IN5B_HD_WIDTH / 8 + 1);
    Height = EPD_7IN5B_HD_HEIGHT;

    UWORD i;
    EPD_7IN5B_HD_SendCommand(0x4F); 
    EPD_7IN5B_HD_SendData(0xAF);
    EPD_7IN5B_HD_SendData(0x02);
    
    EPD_7IN5B_HD_SendCommand(0x24);
    for(i=0; i<Width*Height; i++) {
        EPD_7IN5B_HD_SendData(0xff);

    }
    EPD_7IN5B_HD_SendCommand(0x26);
    for(i=0; i<Width*Height; i++)	{
        EPD_7IN5B_HD_SendData(0xff);

    }
    EPD_7IN5B_HD_TurnOnDisplay();
}

void EPD_7IN5B_HD_ClearBlack(void)
{
    UWORD Width, Height;
    Width =(EPD_7IN5B_HD_WIDTH % 8 == 0)?(EPD_7IN5B_HD_WIDTH / 8 ):(EPD_7IN5B_HD_WIDTH / 8 + 1);
    Height = EPD_7IN5B_HD_HEIGHT;

    UWORD i;
    EPD_7IN5B_HD_SendCommand(0x4F); 
    EPD_7IN5B_HD_SendData(0xAF);
    EPD_7IN5B_HD_SendData(0x02);
    
    EPD_7IN5B_HD_SendCommand(0x24);
    for(i=0; i<Width*Height; i++) {
        EPD_7IN5B_HD_SendData(0x00);

    }
    EPD_7IN5B_HD_SendCommand(0x26);
    for(i=0; i<Width*Height; i++)	{
        EPD_7IN5B_HD_SendData(0x00);

    }
    EPD_7IN5B_HD_TurnOnDisplay();
}

/******************************************************************************
function :	Sends the image buffer in RAM to e-Paper and displays
parameter:
******************************************************************************/
void EPD_7IN5B_HD_Display(const UBYTE *blackimage, const UBYTE *ryimage)
{
    UDOUBLE Width, Height;
    Width =(EPD_7IN5B_HD_WIDTH % 8 == 0)?(EPD_7IN5B_HD_WIDTH / 8 ):(EPD_7IN5B_HD_WIDTH / 8 + 1);
    Height = EPD_7IN5B_HD_HEIGHT;
    EPD_7IN5B_HD_SendCommand(0x4F); 
    EPD_7IN5B_HD_SendData(0xAF);
    EPD_7IN5B_HD_SendData(0x02);
 //send black data
    EPD_7IN5B_HD_SendCommand(0x24);
    for (UDOUBLE j = 0; j < Height; j++) {
        for (UDOUBLE i = 0; i < Width; i++) {
            EPD_7IN5B_HD_SendData(blackimage[i + j * Width]);
        }
    }
 

    //send red data
    EPD_7IN5B_HD_SendCommand(0x26);
    for (UDOUBLE j = 0; j < Height; j++) {
        for (UDOUBLE i = 0; i < Width; i++) {
            EPD_7IN5B_HD_SendData(~ryimage[i + j * Width]);
        }
    }
    EPD_7IN5B_HD_TurnOnDisplay();
}

/******************************************************************************
function :	Enter sleep mode
parameter:
******************************************************************************/
void EPD_7IN5B_HD_Sleep(void)
{
    EPD_7IN5B_HD_SendCommand(0x10);  	//deep sleep
    EPD_7IN5B_HD_SendData(0x01);
}