e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd4in2bc/epd4in2b.cpp

251 lines
7.7 KiB
C++

/**
* @filename : epd4in2b.cpp
* @brief : Implements for Dual-color e-paper library
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare August 10 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 "epd4in2b.h"
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(void) {
/* this calls the peripheral hardware interface, see epdif */
if (IfInit() != 0) {
return -1;
}
/* EPD hardware init start */
Reset();
SendCommand(BOOSTER_SOFT_START);
SendData(0x17);
SendData(0x17);
SendData(0x17); //07 0f 17 1f 27 2F 37 2f
SendCommand(POWER_ON);
WaitUntilIdle();
SendCommand(PANEL_SETTING);
SendData(0x0F); // LUT from OTP
/* EPD hardware init end */
return 0;
}
/**
* @brief: basic function for sending commands
*/
void Epd::SendCommand(unsigned char command) {
DigitalWrite(dc_pin, LOW);
SpiTransfer(command);
}
/**
* @brief: basic function for sending data
*/
void Epd::SendData(unsigned char data) {
DigitalWrite(dc_pin, HIGH);
SpiTransfer(data);
}
/**
* @brief: Wait until the busy_pin goes HIGH
*/
void Epd::WaitUntilIdle(void) {
while(DigitalRead(busy_pin) == 0) { //0: busy, 1: idle
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);
DelayMs(200);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
/**
* @brief: transmit partial data to the SRAM
*/
void Epd::SetPartialWindow(const unsigned char* buffer_black, const unsigned char* buffer_red, int x, int y, int w, int l) {
SendCommand(PARTIAL_IN);
SendCommand(PARTIAL_WINDOW);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(((x & 0xf8) + w - 1) >> 8);
SendData(((x & 0xf8) + w - 1) | 0x07);
SendData(y >> 8);
SendData(y & 0xff);
SendData((y + l - 1) >> 8);
SendData((y + l - 1) & 0xff);
SendData(0x01); // Gates scan both inside and outside of the partial window. (default)
DelayMs(2);
SendCommand(DATA_START_TRANSMISSION_1);
if (buffer_black != NULL) {
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_black[i]);
}
}
DelayMs(2);
SendCommand(DATA_START_TRANSMISSION_2);
if (buffer_red != NULL) {
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_red[i]);
}
}
DelayMs(2);
SendCommand(PARTIAL_OUT);
}
/**
* @brief: transmit partial data to the black part of SRAM
*/
void Epd::SetPartialWindowBlack(const unsigned char* buffer_black, int x, int y, int w, int l) {
SendCommand(PARTIAL_IN);
SendCommand(PARTIAL_WINDOW);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(((x & 0xf8) + w - 1) >> 8);
SendData(((x & 0xf8) + w - 1) | 0x07);
SendData(y >> 8);
SendData(y & 0xff);
SendData((y + l - 1) >> 8);
SendData((y + l - 1) & 0xff);
SendData(0x01); // Gates scan both inside and outside of the partial window. (default)
DelayMs(2);
SendCommand(DATA_START_TRANSMISSION_1);
if (buffer_black != NULL) {
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_black[i]);
}
}
DelayMs(2);
SendCommand(PARTIAL_OUT);
}
/**
* @brief: transmit partial data to the red part of SRAM
*/
void Epd::SetPartialWindowRed(const unsigned char* buffer_red, int x, int y, int w, int l) {
SendCommand(PARTIAL_IN);
SendCommand(PARTIAL_WINDOW);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(((x & 0xf8) + w - 1) >> 8);
SendData(((x & 0xf8) + w - 1) | 0x07);
SendData(y >> 8);
SendData(y & 0xff);
SendData((y + l - 1) >> 8);
SendData((y + l - 1) & 0xff);
SendData(0x01); // Gates scan both inside and outside of the partial window. (default)
DelayMs(2);
SendCommand(DATA_START_TRANSMISSION_2);
if (buffer_red != NULL) {
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_red[i]);
}
}
DelayMs(2);
SendCommand(PARTIAL_OUT);
}
/**
* @brief: refresh and displays the frame
*/
void Epd::DisplayFrame(const unsigned char* frame_black, const unsigned char* frame_red) {
if (frame_black != NULL) {
SendCommand(DATA_START_TRANSMISSION_1);
DelayMs(2);
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(pgm_read_byte(&frame_black[i]));
}
DelayMs(2);
}
if (frame_red != NULL) {
SendCommand(DATA_START_TRANSMISSION_2);
DelayMs(2);
for (int i = 0; i < this->width / 8 * this->height; i++) {
SendData(pgm_read_byte(&frame_red[i]));
}
DelayMs(2);
}
SendCommand(DISPLAY_REFRESH);
WaitUntilIdle();
}
/**
* @brief: clear the frame data from the SRAM, this won't refresh the display
*/
void Epd::ClearFrame(void) {
SendCommand(DATA_START_TRANSMISSION_1);
DelayMs(2);
for(int i = 0; i < width / 8 * height; i++) {
SendData(0xFF);
}
DelayMs(2);
SendCommand(DATA_START_TRANSMISSION_2);
DelayMs(2);
for(int i = 0; i < width / 8 * height; i++) {
SendData(0xFF);
}
DelayMs(2);
}
/**
* @brief: This displays the frame data from SRAM
*/
void Epd::DisplayFrame(void) {
SendCommand(DISPLAY_REFRESH);
DelayMs(100);
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. The only one parameter is a
* check code, the command would be executed if check code = 0xA5.
* You can use Epd::Reset() to awaken and use Epd::Init() to initialize.
*/
void Epd::Sleep() {
SendCommand(VCOM_AND_DATA_INTERVAL_SETTING);
SendData(0xF7); // border floating
SendCommand(POWER_OFF);
WaitUntilIdle();
SendCommand(DEEP_SLEEP);
SendData(0xA5); // check code
}
/* END OF FILE */