wavesharelib/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_2in7b_V2.c

/*****************************************************************************
* | File      	:   EPD_2in7b_V2.c
* | Author      :   Waveshare team
* | Function    :   2.7inch e-paper b V2
* | Info        :
*----------------
* |	This version:   V1.0
* | Date        :   2020-10-20
* | 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_2in7b_V2.h"
#include "Debug.h"


/******************************************************************************
function :	Software reset
parameter:
******************************************************************************/
static void EPD_2IN7B_V2_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_2IN7B_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_2IN7B_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_2IN7B_V2_ReadBusy(void)
{
    Debug("e-Paper busy\r\n");
    while(DEV_Digital_Read(EPD_BUSY_PIN) == 0) {      //0: busy, 1: idle
        DEV_Delay_ms(100);
    }    
    Debug("e-Paper busy release\r\n");
}


/******************************************************************************
function :	Initialize the e-Paper register
parameter:
******************************************************************************/
void EPD_2IN7B_V2_Init(void)
{
	EPD_2IN7B_V2_Reset();

	EPD_2IN7B_V2_ReadBusy();

	EPD_2IN7B_V2_SendCommand(0x4D);     
	EPD_2IN7B_V2_SendData(0xAA);

	EPD_2IN7B_V2_SendCommand(0x87);     
	EPD_2IN7B_V2_SendData(0x28);   

	EPD_2IN7B_V2_SendCommand(0x84);     
	EPD_2IN7B_V2_SendData(0x00);

	EPD_2IN7B_V2_SendCommand(0x83);     
	EPD_2IN7B_V2_SendData(0x05);

	EPD_2IN7B_V2_SendCommand(0xA8);     
	EPD_2IN7B_V2_SendData(0xDF);          

	EPD_2IN7B_V2_SendCommand(0xA9);     
	EPD_2IN7B_V2_SendData(0x05);

	EPD_2IN7B_V2_SendCommand(0xB1);     
	EPD_2IN7B_V2_SendData(0xE8);  

	EPD_2IN7B_V2_SendCommand(0xAB);     
	EPD_2IN7B_V2_SendData(0xA1);   

	EPD_2IN7B_V2_SendCommand(0xB9);     
	EPD_2IN7B_V2_SendData(0x10);   

	EPD_2IN7B_V2_SendCommand(0x88);     
	EPD_2IN7B_V2_SendData(0x80);   

	EPD_2IN7B_V2_SendCommand(0x90);     
	EPD_2IN7B_V2_SendData(0x02);

	EPD_2IN7B_V2_SendCommand(0x86);     
	EPD_2IN7B_V2_SendData(0x15);

	EPD_2IN7B_V2_SendCommand(0x91);     
	EPD_2IN7B_V2_SendData(0x8D); 

	EPD_2IN7B_V2_SendCommand(0x50);    
	EPD_2IN7B_V2_SendData(0x57);
	
	EPD_2IN7B_V2_SendCommand(0xAA);    
	EPD_2IN7B_V2_SendData(0x0F);
	
	EPD_2IN7B_V2_SendCommand(0x00);    
	EPD_2IN7B_V2_SendData(0x8f);

}

/******************************************************************************
function :	Clear screen
parameter:
******************************************************************************/
void EPD_2IN7B_V2_Clear(void)
{    
    UWORD Width, Height;
    Width = (EPD_2IN7B_V2_WIDTH % 8 == 0)? (EPD_2IN7B_V2_WIDTH / 8 ): (EPD_2IN7B_V2_WIDTH / 8 + 1);
    Height = EPD_2IN7B_V2_HEIGHT;

    EPD_2IN7B_V2_SendCommand(0x10);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            EPD_2IN7B_V2_SendData(0Xff);
        }
    }

    EPD_2IN7B_V2_SendCommand(0x13);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            EPD_2IN7B_V2_SendData(0X00);
        }
    }

	EPD_2IN7B_V2_SendCommand(0x04); // Power ON 
	EPD_2IN7B_V2_ReadBusy();
	DEV_Delay_ms(10);
	EPD_2IN7B_V2_SendCommand(0x12);  // Display Refresh
	EPD_2IN7B_V2_ReadBusy(); 
	DEV_Delay_ms(10);
	EPD_2IN7B_V2_SendCommand(0x02);  // Power OFF
	EPD_2IN7B_V2_ReadBusy(); 
	DEV_Delay_ms(20);
}

/******************************************************************************
function :	Sends the image buffer in RAM to e-Paper and displays
parameter:
******************************************************************************/
void EPD_2IN7B_V2_Display(UBYTE *Imageblack, UBYTE *Imagered)
{
    UWORD Width, Height;
    Width = (EPD_2IN7B_V2_WIDTH % 8 == 0)? (EPD_2IN7B_V2_WIDTH / 8 ): (EPD_2IN7B_V2_WIDTH / 8 + 1);
    Height = EPD_2IN7B_V2_HEIGHT;

    EPD_2IN7B_V2_SendCommand(0x10);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            EPD_2IN7B_V2_SendData(Imageblack[i + j * Width]);
        }
    }
    
    EPD_2IN7B_V2_SendCommand(0x13);
    for (UWORD j = 0; j < Height; j++) {
        for (UWORD i = 0; i < Width; i++) {
            EPD_2IN7B_V2_SendData(~Imagered[i + j * Width]);
        }
    }


	EPD_2IN7B_V2_SendCommand(0x04); // Power ON 
	EPD_2IN7B_V2_ReadBusy();
	DEV_Delay_ms(10);
	EPD_2IN7B_V2_SendCommand(0x12);  // Display Refresh
	EPD_2IN7B_V2_ReadBusy(); 
	DEV_Delay_ms(10);
	EPD_2IN7B_V2_SendCommand(0x02);  // Power OFF
	EPD_2IN7B_V2_ReadBusy(); 
	DEV_Delay_ms(20);
}

/******************************************************************************
function :	Enter sleep mode
parameter:
******************************************************************************/
void EPD_2IN7B_V2_Sleep(void)
{
  	EPD_2IN7B_V2_SendCommand(0x07);  // Deep sleep
  	EPD_2IN7B_V2_SendData(0xA5);
}