e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd2in9_V2/epd2in9_V2.cpp

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/**
* @filename : epd2in9_V2.cpp
* @brief : Implements for e-paper library
* @author :
*
* Copyright (C) Waveshare Nov 9 2020
*
* 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 "epd2in9_V2.h"
unsigned char _WF_PARTIAL_2IN9[159] =
{
0x0,0x40,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x80,0x80,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x40,0x40,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x80,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0A,0x0,0x0,0x0,0x0,0x0,0x2,
0x1,0x0,0x0,0x0,0x0,0x0,0x0,
0x1,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x22,0x22,0x22,0x22,0x22,0x22,0x0,0x0,0x0,
0x22,0x17,0x41,0xB0,0x32,0x36,
};
unsigned char WS_20_30[159] =
{
0x80, 0x66, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x40, 0x0, 0x0, 0x0,
0x10, 0x66, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0,
0x80, 0x66, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x40, 0x0, 0x0, 0x0,
0x10, 0x66, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x14, 0x8, 0x0, 0x0, 0x0, 0x0, 0x1,
0xA, 0xA, 0x0, 0xA, 0xA, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x14, 0x8, 0x0, 0x1, 0x0, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x0, 0x0, 0x0,
0x22, 0x17, 0x41, 0x0, 0x32, 0x36
};
unsigned char Gray4[159] =
{
0x00, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //VS L0 //2.28s
0x20, 0x60, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //VS L1
0x28, 0x60, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //VS L2
0x2A, 0x60, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //VS L3
0x00, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //VS L4
0x00, 0x02, 0x00, 0x05, 0x14, 0x00, 0x00, //TP, SR, RP of Group0
0x1E, 0x1E, 0x00, 0x00, 0x00, 0x00, 0x01, //TP, SR, RP of Group1
0x00, 0x02, 0x00, 0x05, 0x14, 0x00, 0x00, //TP, SR, RP of Group2
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group3
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group4
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group5
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group6
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group7
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group8
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group9
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group10
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //TP, SR, RP of Group11
0x24, 0x22, 0x22, 0x22, 0x23, 0x32, 0x00, 0x00, 0x00, //FR, XON
0x22, 0x17, 0x41, 0xAE, 0x32, 0x28, //EOPT VGH VSH1 VSH2 VSL VCOM
};
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() {
/* this calls the peripheral hardware interface, see epdif */
if (IfInit() != 0) {
return -1;
}
Reset();
/* EPD hardware init start */
WaitUntilIdle();
SendCommand(0x12); //SWRESET
WaitUntilIdle();
SendCommand(0x01); //Driver output control
SendData(0x27);
SendData(0x01);
SendData(0x00);
SendCommand(0x11); //data entry mode
SendData(0x03);
SetMemoryArea(0, 0, width-1, height-1);
SendCommand(0x21); // Display update control
SendData(0x00);
SendData(0x80);
SetMemoryPointer(0, 0);
WaitUntilIdle();
SetLut_by_host(WS_20_30);
/* EPD hardware init end */
return 0;
}
int Epd::Init_4Gray() {
/* this calls the peripheral hardware interface, see epdif */
if (IfInit() != 0) {
return -1;
}
Reset();
/* EPD hardware init start */
WaitUntilIdle();
SendCommand(0x12); //SWRESET
WaitUntilIdle();
SendCommand(0x01); //Driver output control
SendData(0x27);
SendData(0x01);
SendData(0x00);
SendCommand(0x11); //data entry mode
SendData(0x03);
SetMemoryArea(8, 0, width, height-1);
SendCommand(0x3C);
SendData(0x04);
SetMemoryPointer(8, 0);
WaitUntilIdle();
SetLut_by_host(Gray4);
/* EPD hardware init end */
return 0;
}
/**
* @brief: basic function for sending commands
*/
void Epd::SendCommand(unsigned char command) {
DigitalWrite(dc_pin, LOW);
DigitalWrite(cs_pin, LOW);
SpiTransfer(command);
DigitalWrite(cs_pin, HIGH);
}
/**
* @brief: basic function for sending data
*/
void Epd::SendData(unsigned char data) {
DigitalWrite(dc_pin, HIGH);
DigitalWrite(cs_pin, LOW);
SpiTransfer(data);
DigitalWrite(cs_pin, HIGH);
}
/**
* @brief: Wait until the busy_pin goes LOW
*/
void Epd::WaitUntilIdle(void) {
while(1) { //=1 BUSY
if(DigitalRead(busy_pin)==LOW)
break;
DelayMs(5);
}
DelayMs(5);
}
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
void Epd::Reset(void) {
DigitalWrite(reset_pin, HIGH);
DelayMs(20);
DigitalWrite(reset_pin, LOW); //module reset
DelayMs(5);
DigitalWrite(reset_pin, HIGH);
DelayMs(20);
}
/**
* @brief: put an image buffer to the frame memory.
* this won't update the display.
*/
void Epd::SetFrameMemory(
const unsigned char* image_buffer,
int x,
int y,
int image_width,
int image_height
) {
int x_end;
int y_end;
if (
image_buffer == NULL ||
x < 0 || image_width < 0 ||
y < 0 || image_height < 0
) {
return;
}
/* x point must be the multiple of 8 or the last 3 bits will be ignored */
x &= 0xF8;
image_width &= 0xF8;
if (x + image_width >= this->width) {
x_end = this->width - 1;
} else {
x_end = x + image_width - 1;
}
if (y + image_height >= this->height) {
y_end = this->height - 1;
} else {
y_end = y + image_height - 1;
}
SetMemoryArea(x, y, x_end, y_end);
SetMemoryPointer(x, y);
SendCommand(0x24);
/* send the image data */
for (int j = 0; j < y_end - y + 1; j++) {
for (int i = 0; i < (x_end - x + 1) / 8; i++) {
SendData(image_buffer[i + j * (image_width / 8)]);
}
}
}
void Epd::SetFrameMemory_Partial(
const unsigned char* image_buffer,
int x,
int y,
int image_width,
int image_height
) {
int x_end;
int y_end;
if (
image_buffer == NULL ||
x < 0 || image_width < 0 ||
y < 0 || image_height < 0
) {
return;
}
/* x point must be the multiple of 8 or the last 3 bits will be ignored */
x &= 0xF8;
image_width &= 0xF8;
if (x + image_width >= this->width) {
x_end = this->width - 1;
} else {
x_end = x + image_width - 1;
}
if (y + image_height >= this->height) {
y_end = this->height - 1;
} else {
y_end = y + image_height - 1;
}
DigitalWrite(reset_pin, LOW);
DelayMs(2);
DigitalWrite(reset_pin, HIGH);
DelayMs(2);
SetLut(_WF_PARTIAL_2IN9);
SendCommand(0x37);
SendData(0x00);
SendData(0x00);
SendData(0x00);
SendData(0x00);
SendData(0x00);
SendData(0x40);
SendData(0x00);
SendData(0x00);
SendData(0x00);
SendData(0x00);
SendCommand(0x3C); //BorderWavefrom
SendData(0x80);
SendCommand(0x22);
SendData(0xC0);
SendCommand(0x20);
WaitUntilIdle();
SetMemoryArea(x, y, x_end, y_end);
SetMemoryPointer(x, y);
SendCommand(0x24);
/* send the image data */
for (int j = 0; j < y_end - y + 1; j++) {
for (int i = 0; i < (x_end - x + 1) / 8; i++) {
SendData(image_buffer[i + j * (image_width / 8)]);
}
}
}
/**
* @brief: put an image buffer to the frame memory.
* this won't update the display.
*
* Question: When do you use this function instead of
* void SetFrameMemory(
* const unsigned char* image_buffer,
* int x,
* int y,
* int image_width,
* int image_height
* );
* Answer: SetFrameMemory with parameters only reads image data
* from the RAM but not from the flash in AVR chips (for AVR chips,
* you have to use the function pgm_read_byte to read buffers
* from the flash).
*/
void Epd::SetFrameMemory(const unsigned char* image_buffer) {
SetMemoryArea(0, 0, this->width - 1, this->height - 1);
SetMemoryPointer(0, 0);
SendCommand(0x24);
/* send the image data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(pgm_read_byte(&image_buffer[i]));
}
}
void Epd::SetFrameMemory_Base(const unsigned char* image_buffer) {
SetMemoryArea(0, 0, this->width - 1, this->height - 1);
SetMemoryPointer(0, 0);
SendCommand(0x24);
/* send the image data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(pgm_read_byte(&image_buffer[i]));
}
SendCommand(0x26);
/* send the image data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(pgm_read_byte(&image_buffer[i]));
}
}
/**
* @brief: clear the frame memory with the specified color.
* this won't update the display.
*/
void Epd::ClearFrameMemory(unsigned char color) {
SetMemoryArea(0, 0, this->width - 1, this->height - 1);
SetMemoryPointer(0, 0);
SendCommand(0x24);
/* send the color data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(color);
}
SendCommand(0x26);
/* send the color data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(color);
}
}
void Epd::Display4Gray(const unsigned char *Image)
{
int i,j,k;
unsigned char temp1,temp2,temp3;
SendCommand(0x24);
for(i=0;i<4736;i++)
{
temp3=0;
for(j=0;j<2;j++)
{
temp1 = pgm_read_byte(&Image[i*2+j]);
for(k=0;k<2;k++)
{
temp2 = temp1&0xC0 ;
if(temp2 == 0xC0)
temp3 |= 0x00;//white
else if(temp2 == 0x00)
temp3 |= 0x01; //black
else if(temp2 == 0x80)
temp3 |= 0x01; //gray1
else //0x40
temp3 |= 0x00; //gray2
temp3 <<= 1;
temp1 <<= 2;
temp2 = temp1&0xC0 ;
if(temp2 == 0xC0) //white
temp3 |= 0x00;
else if(temp2 == 0x00) //black
temp3 |= 0x01;
else if(temp2 == 0x80)
temp3 |= 0x01; //gray1
else //0x40
temp3 |= 0x00; //gray2
if(j!=1 || k!=1)
temp3 <<= 1;
temp1 <<= 2;
}
}
SendData(temp3);
}
// new data
SendCommand(0x26);
for(i=0;i<4736;i++)
{
temp3=0;
for(j=0;j<2;j++)
{
temp1 = pgm_read_byte(&Image[i*2+j]);
for(k=0;k<2;k++)
{
temp2 = temp1&0xC0 ;
if(temp2 == 0xC0)
temp3 |= 0x00;//white
else if(temp2 == 0x00)
temp3 |= 0x01; //black
else if(temp2 == 0x80)
temp3 |= 0x00; //gray1
else //0x40
temp3 |= 0x01; //gray2
temp3 <<= 1;
temp1 <<= 2;
temp2 = temp1&0xC0 ;
if(temp2 == 0xC0) //white
temp3 |= 0x00;
else if(temp2 == 0x00) //black
temp3 |= 0x01;
else if(temp2 == 0x80)
temp3 |= 0x00; //gray1
else //0x40
temp3 |= 0x01; //gray2
if(j!=1 || k!=1)
temp3 <<= 1;
temp1 <<= 2;
}
}
SendData(temp3);
}
DisplayFrame();
}
/**
* @brief: update the display
* there are 2 memory areas embedded in the e-paper display
* but once this function is called,
* the the next action of SetFrameMemory or ClearFrame will
* set the other memory area.
*/
void Epd::DisplayFrame(void) {
SendCommand(0x22);
SendData(0xc7);
SendCommand(0x20);
WaitUntilIdle();
}
void Epd::DisplayFrame_Partial(void) {
SendCommand(0x22);
SendData(0x0F);
SendCommand(0x20);
WaitUntilIdle();
}
void Epd::SetLut(unsigned char *lut) {
unsigned char count;
SendCommand(0x32);
for(count=0; count<153; count++)
SendData(lut[count]);
WaitUntilIdle();
}
void Epd::SetLut_by_host(unsigned char *lut) {
SetLut((unsigned char *)lut);
SendCommand(0x3f);
SendData(*(lut+153));
SendCommand(0x03); // gate voltage
SendData(*(lut+154));
SendCommand(0x04); // source voltage
SendData(*(lut+155)); // VSH
SendData(*(lut+156)); // VSH2
SendData(*(lut+157)); // VSL
SendCommand(0x2c); // VCOM
SendData(*(lut+158));
}
/**
* @brief: private function to specify the memory area for data R/W
*/
void Epd::SetMemoryArea(int x_start, int y_start, int x_end, int y_end) {
SendCommand(0x44);
/* x point must be the multiple of 8 or the last 3 bits will be ignored */
SendData((x_start >> 3) & 0xFF);
SendData((x_end >> 3) & 0xFF);
SendCommand(0x45);
SendData(y_start & 0xFF);
SendData((y_start >> 8) & 0xFF);
SendData(y_end & 0xFF);
SendData((y_end >> 8) & 0xFF);
}
/**
* @brief: private function to specify the start point for data R/W
*/
void Epd::SetMemoryPointer(int x, int y) {
SendCommand(0x4E);
/* x point must be the multiple of 8 or the last 3 bits will be ignored */
SendData((x >> 3) & 0xFF);
SendCommand(0x4F);
SendData(y & 0xFF);
SendData((y >> 8) & 0xFF);
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.
* You can use Epd::Init() to awaken
*/
void Epd::Sleep() {
SendCommand(0x10);
SendData(0x01);
// WaitUntilIdle();
}
/* END OF FILE */