e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd7in5/epd7in5.cpp

173 lines
4.5 KiB
C++

/**
* @filename : epd7in5.cpp
* @brief : Implements for 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 "epd7in5.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) {
if (IfInit() != 0) {
return -1;
}
Reset();
SendCommand(POWER_SETTING);
SendData(0x37);
SendData(0x00);
SendCommand(PANEL_SETTING);
SendData(0xCF);
SendData(0x08);
SendCommand(BOOSTER_SOFT_START);
SendData(0xc7);
SendData(0xcc);
SendData(0x28);
SendCommand(POWER_ON);
WaitUntilIdle();
SendCommand(PLL_CONTROL);
SendData(0x3c);
SendCommand(TEMPERATURE_CALIBRATION);
SendData(0x00);
SendCommand(VCOM_AND_DATA_INTERVAL_SETTING);
SendData(0x77);
SendCommand(TCON_SETTING);
SendData(0x22);
SendCommand(TCON_RESOLUTION);
SendData(0x02); //source 640
SendData(0x80);
SendData(0x01); //gate 384
SendData(0x80);
SendCommand(VCM_DC_SETTING);
SendData(0x1E); //decide by LUT file
SendCommand(0xe5); //FLASH MODE
SendData(0x03);
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); //module reset
DelayMs(200);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
void Epd::DisplayFrame(const unsigned char* frame_buffer) {
unsigned char temp1, temp2;
SendCommand(DATA_START_TRANSMISSION_1);
for(long i = 0; i < EPD_WIDTH / 8 * EPD_HEIGHT; i++) {
temp1 = pgm_read_byte(&frame_buffer[i]);
for(unsigned char j = 0; j < 8; j++) {
if(temp1 & 0x80)
temp2 = 0x03;
else
temp2 = 0x00;
temp2 <<= 4;
temp1 <<= 1;
j++;
if(temp1 & 0x80)
temp2 |= 0x03;
else
temp2 |= 0x00;
temp1 <<= 1;
SendData(temp2);
}
}
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
*/
void Epd::Sleep(void) {
SendCommand(POWER_OFF);
WaitUntilIdle();
SendCommand(DEEP_SLEEP);
SendData(0xa5);
}
/* END OF FILE */