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Tasmota/lib/lib_display/Epaper_29-gemu-1.0/epd2in9.cpp

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/**
* @filename : epd2in9.cpp
* @brief : Implements for e-paper library
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare September 9 2017
*
* 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.h"
Epd::Epd(int16_t width, int16_t height) :
Paint(width,height) {
}
void Epd::DisplayOnff(int8_t on) {
}
void Epd::Updateframe() {
SetFrameMemory(framebuffer, 0, 0, EPD_WIDTH,EPD_HEIGHT);
DisplayFrame();
//Serial.printf("update\n");
}
#define DISPLAY_INIT_MODE 0
#define DISPLAY_INIT_PARTIAL 1
#define DISPLAY_INIT_FULL 2
void Epd::DisplayInit(int8_t p,int8_t size,int8_t rot,int8_t font) {
// ignore update mode
if (p==DISPLAY_INIT_PARTIAL) {
Init(lut_partial_update);
//ClearFrameMemory(0xFF); // bit set = white, bit reset = black
DisplayFrame();
delay(500);
return;
//Serial.printf("partial\n");
} else if (p==DISPLAY_INIT_FULL) {
Init(lut_full_update);
//ClearFrameMemory(0xFF); // bit set = white, bit reset = black
DisplayFrame();
delay(3500);
//Serial.printf("full\n");
return;
} else {
Updateframe();
}
setRotation(rot);
invertDisplay(false);
setTextWrap(false); // Allow text to run off edges
cp437(true);
setTextFont(font&3);
setTextSize(size&7);
setTextColor(WHITE,BLACK);
setCursor(0,0);
fillScreen(BLACK);
disp_bpp = 1;
}
void Epd::Begin(int16_t cs,int16_t mosi,int16_t sclk) {
cs_pin=cs;
mosi_pin=mosi;
sclk_pin=sclk;
}
void Epd::Init(int8_t p) {
if (p==DISPLAY_INIT_PARTIAL) {
Init(lut_partial_update);
} else {
Init(lut_full_update);
}
ClearFrameMemory(0xFF);
DisplayFrame();
if (p==DISPLAY_INIT_PARTIAL) {
delay(350);
} else {
delay(3500);
}
}
int Epd::Init(const unsigned char* lut) {
/* this calls the peripheral hardware interface, see epdif */
/*if (IfInit() != 0) {
return -1;
}*/
/*
cs_pin=pin[GPIO_SSPI_CS];
mosi_pin=pin[GPIO_SSPI_MOSI];
sclk_pin=pin[GPIO_SSPI_SCLK];
*/
framebuffer = (uint8_t*)malloc(EPD_WIDTH * EPD_HEIGHT / 8);
if (!framebuffer) return -1;
pinMode(cs_pin, OUTPUT);
pinMode(mosi_pin, OUTPUT);
pinMode(sclk_pin, OUTPUT);
digitalWrite(cs_pin,HIGH);
digitalWrite(mosi_pin,LOW);
digitalWrite(sclk_pin,LOW);
width = EPD_WIDTH;
height = EPD_HEIGHT;
/* EPD hardware init start */
this->lut = lut;
Reset();
SendCommand(DRIVER_OUTPUT_CONTROL);
SendData((EPD_HEIGHT - 1) & 0xFF);
SendData(((EPD_HEIGHT - 1) >> 8) & 0xFF);
SendData(0x00); // GD = 0; SM = 0; TB = 0;
SendCommand(BOOSTER_SOFT_START_CONTROL);
SendData(0xD7);
SendData(0xD6);
SendData(0x9D);
SendCommand(WRITE_VCOM_REGISTER);
SendData(0xA8); // VCOM 7C
SendCommand(SET_DUMMY_LINE_PERIOD);
SendData(0x1A); // 4 dummy lines per gate
SendCommand(SET_GATE_TIME);
SendData(0x08); // 2us per line
SendCommand(DATA_ENTRY_MODE_SETTING);
SendData(0x03); // X increment; Y increment
SetLut(this->lut);
/* EPD hardware init end */
return 0;
}
/**
* @brief: basic function for sending commands
*/
void Epd::SendCommand(unsigned char command) {
//DigitalWrite(dc_pin, LOW);
//SpiTransfer(command);
fastSPIwrite(command,0);
}
/**
* @brief: basic function for sending data
*/
void Epd::SendData(unsigned char data) {
fastSPIwrite(data,1);
// DigitalWrite(dc_pin, HIGH);
// SpiTransfer(data);
}
/**
* @brief: Wait until the busy_pin goes LOW
*/
void Epd::WaitUntilIdle(void) {
return;
//while(DigitalRead(busy_pin) == HIGH) { //LOW: idle, HIGH: busy
// DelayMs(100);
//}
}
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
void Epd::Reset(void) {
//DigitalWrite(reset_pin, LOW); //module reset
//delay(200);
//DigitalWrite(reset_pin, HIGH);
//delay(200);
}
/**
* @brief: set the look-up table register
*/
void Epd::SetLut(const unsigned char* lut) {
this->lut = lut;
SendCommand(WRITE_LUT_REGISTER);
/* the length of look-up table is 30 bytes */
for (int i = 0; i < 30; i++) {
SendData(this->lut[i]);
}
}
/**
* @brief: put an image buffer to the frame memory.
* this won't update the display.
*/
void Epd::SetFrameMemory(
const unsigned char* image_buffer,
uint16_t x,
uint16_t y,
uint16_t image_width,
uint16_t image_height
) {
uint16_t x_end;
uint16_t 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 &= 0xFFF8;
image_width &= 0xFFF8;
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;
}
if (!x && !y && image_width==this->width && image_height==this->height) {
SetFrameMemory(image_buffer);
return;
}
SetMemoryArea(x, y, x_end, y_end);
SetMemoryPointer(x, y);
SendCommand(WRITE_RAM);
/* send the image data */
for (uint16_t j = 0; j < y_end - y + 1; j++) {
for (uint16_t i = 0; i < (x_end - x + 1) / 8; i++) {
SendData(image_buffer[i + j * (image_width / 8)]^0xff);
}
}
}
/**
* @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(WRITE_RAM);
/* send the image data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(pgm_read_byte(&image_buffer[i])^0xff);
}
}
/**
* @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(WRITE_RAM);
/* send the color data */
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(color);
}
}
/**
* @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(DISPLAY_UPDATE_CONTROL_2);
SendData(0xC4);
SendCommand(MASTER_ACTIVATION);
SendCommand(TERMINATE_FRAME_READ_WRITE);
WaitUntilIdle();
}
/**
* @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(SET_RAM_X_ADDRESS_START_END_POSITION);
/* 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(SET_RAM_Y_ADDRESS_START_END_POSITION);
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(SET_RAM_X_ADDRESS_COUNTER);
/* x point must be the multiple of 8 or the last 3 bits will be ignored */
SendData((x >> 3) & 0xFF);
SendCommand(SET_RAM_Y_ADDRESS_COUNTER);
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(DEEP_SLEEP_MODE);
WaitUntilIdle();
}
const unsigned char lut_full_update[] =
{
0x02, 0x02, 0x01, 0x11, 0x12, 0x12, 0x22, 0x22,
0x66, 0x69, 0x69, 0x59, 0x58, 0x99, 0x99, 0x88,
0x00, 0x00, 0x00, 0x00, 0xF8, 0xB4, 0x13, 0x51,
0x35, 0x51, 0x51, 0x19, 0x01, 0x00
};
const unsigned char lut_partial_update[] =
{
0x10, 0x18, 0x18, 0x08, 0x18, 0x18, 0x08, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x13, 0x14, 0x44, 0x12,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#define PIN_OUT_SET 0x60000304
#define PIN_OUT_CLEAR 0x60000308
#ifdef ESP32
#define SSPI_USEANYPIN 1
#define PWRITE digitalWrite
#else
#define PWRITE ydigitalWrite
#endif
#ifndef SSPI_USEANYPIN
// uses about 2.75 usecs, 365 kb /sec
// however does not work with GPIO 16 !!!!
void ICACHE_RAM_ATTR Epd::fastSPIwrite(uint8_t d,uint8_t dc) {
WRITE_PERI_REG( PIN_OUT_CLEAR, 1<<cs_pin);
WRITE_PERI_REG( PIN_OUT_CLEAR, 1<<sclk_pin);
if(dc) WRITE_PERI_REG( PIN_OUT_SET, 1<<mosi_pin);
else WRITE_PERI_REG( PIN_OUT_CLEAR, 1<<mosi_pin);
WRITE_PERI_REG( PIN_OUT_SET, 1<<sclk_pin);
for(uint8_t bit = 0x80; bit; bit >>= 1) {
WRITE_PERI_REG( PIN_OUT_CLEAR, 1<<sclk_pin);
if(d&bit) WRITE_PERI_REG( PIN_OUT_SET, 1<<mosi_pin);
else WRITE_PERI_REG( PIN_OUT_CLEAR, 1<<mosi_pin);
WRITE_PERI_REG( PIN_OUT_SET, 1<<sclk_pin);
}
WRITE_PERI_REG( PIN_OUT_SET, 1<<cs_pin);
}
#else
#ifndef ESP32
extern void ICACHE_RAM_ATTR xdigitalWrite(uint8_t pin, uint8_t val) {
//stopWaveform(pin);
if(pin < 16){
if(val) GPOS = (1 << pin);
else GPOC = (1 << pin);
} else if(pin == 16){
if(val) GP16O |= 1;
else GP16O &= ~1;
}
}
#endif
// about 13 us => 76 kb / sec
// can use any pin
void Epd::fastSPIwrite(uint8_t d,uint8_t dc) {
PWRITE(cs_pin, LOW);
// transfer dc
PWRITE(sclk_pin, LOW);
if(dc) PWRITE(mosi_pin, HIGH);
else PWRITE(mosi_pin, LOW);
PWRITE(sclk_pin, HIGH);
for(uint8_t bit = 0x80; bit; bit >>= 1) {
PWRITE(sclk_pin, LOW);
if(d & bit) PWRITE(mosi_pin, HIGH);
else PWRITE(mosi_pin, LOW);
PWRITE(sclk_pin, HIGH);
}
PWRITE(cs_pin, HIGH);
}
#endif
/* END OF FILE */
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