mirror of
https://github.com/jam422470459/EPD-nRF52-hema213.git
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268 lines
8.0 KiB
C
268 lines
8.0 KiB
C
/*****************************************************************************
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* | File : EPD_4in2.c
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* | Author : Waveshare team
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* | Function : 4.2inch e-paper
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* | Info :
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*----------------
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* | This version: V3.0
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* | Date : 2019-06-13
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* -----------------------------------------------------------------------------
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documnetation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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******************************************************************************/
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#include "EPD_driver.h"
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#include "nrf_log.h"
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// commands used by this driver
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#define CMD_PSR 0x00 // Panel Setting
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#define CMD_POF 0x02 // Power OFF
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#define CMD_PON 0x04 // Power ON
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#define CMD_DSLP 0x07 // Deep sleep
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#define CMD_DTM1 0x10 // Display Start Transmission 1
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#define CMD_DRF 0x12 // Display Refresh
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#define CMD_DTM2 0x13 // Display Start transmission 2
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#define CMD_TSC 0x40 // Temperature Sensor Calibration
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#define CMD_CDI 0x50 // Vcom and data interval setting
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#define CMD_PTL 0x90 // Partial Window
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#define CMD_PTIN 0x91 // Partial In
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#define CMD_PTOUT 0x92 // Partial Out
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#define CMD_CCSET 0xE0 // Cascade Setting
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#define CMD_TSSET 0xE5 // Force Temperauture
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// PSR registers
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#define PSR_RES1 BIT(7)
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#define PSR_RES0 BIT(6)
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#define PSR_REG BIT(5)
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#define PSR_BWR BIT(4)
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#define PSR_UD BIT(3)
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#define PSR_SHL BIT(2)
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#define PSR_SHD BIT(1)
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#define PSR_RST BIT(0)
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static void UC8176_WaitBusy(uint16_t timeout)
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{
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EPD_WaitBusy(LOW, timeout);
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}
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static void UC8176_PowerOn(void)
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{
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EPD_WriteCommand(CMD_PON);
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UC8176_WaitBusy(100);
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}
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static void UC8176_PowerOff(void)
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{
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EPD_WriteCommand(CMD_POF);
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UC8176_WaitBusy(100);
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}
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// Read temperature from driver chip
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int8_t UC8176_Read_Temp(void)
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{
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EPD_WriteCommand(CMD_TSC);
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UC8176_WaitBusy(100);
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return (int8_t) EPD_ReadByte();
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}
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// Force temperature (will trigger OTP LUT switch)
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void UC8176_Force_Temp(int8_t value)
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{
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EPD_WriteCommand(CMD_CCSET);
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EPD_WriteByte(0x02);
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EPD_WriteCommand(CMD_TSSET);
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EPD_WriteByte(value);
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}
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/******************************************************************************
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function : Turn On Display
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parameter:
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******************************************************************************/
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void UC8176_Refresh(void)
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{
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NRF_LOG_DEBUG("[EPD]: refresh begin\n");
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UC8176_PowerOn();
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NRF_LOG_DEBUG("[EPD]: temperature: %d\n", UC8176_Read_Temp());
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EPD_WriteCommand(CMD_DRF);
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delay(100);
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UC8176_WaitBusy(30000);
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UC8176_PowerOff();
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NRF_LOG_DEBUG("[EPD]: refresh end\n");
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}
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/******************************************************************************
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function : Initialize the e-Paper register
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parameter:
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******************************************************************************/
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void UC8176_Init()
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{
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EPD_Reset(HIGH, 10);
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epd_model_t *EPD = epd_get();
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uint8_t psr = PSR_UD | PSR_SHL | PSR_SHD | PSR_RST;
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if (!EPD->bwr) psr |= PSR_BWR;
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if (EPD->width == 320 && EPD->height == 300) {
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psr |= PSR_RES0;
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} else if (EPD->width == 320 && EPD->height == 240) {
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psr |= PSR_RES1;
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} else if (EPD->width == 200 && EPD->height == 300) {
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psr |= PSR_RES1 | PSR_RES0;
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} else {
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// default to 400x300
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}
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NRF_LOG_DEBUG("[EPD]: PSR=%02x\n", psr);
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EPD_WriteCommand(CMD_PSR);
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EPD_WriteByte(psr);
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if (!EPD->bwr) {
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EPD_WriteCommand(CMD_CDI);
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EPD_WriteByte(0x97);
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}
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}
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static void UC8176_Write_RAM(uint8_t cmd, uint8_t value)
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{
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epd_model_t *EPD = epd_get();
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uint16_t Width = (EPD->width + 7) / 8;
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uint16_t Height = EPD->height;
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EPD_WriteCommand(cmd);
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for (uint16_t j = 0; j < Height; j++) {
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for (uint16_t i = 0; i < Width; i++) {
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EPD_WriteByte(value);
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}
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}
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}
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/******************************************************************************
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function : Clear screen
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parameter:
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******************************************************************************/
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void UC8176_Clear(void)
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{
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epd_model_t *EPD = epd_get();
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UC8176_Write_RAM(CMD_DTM1, 0xFF);
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UC8176_Write_RAM(CMD_DTM2, EPD->invert_color ? 0x00 : 0xFF);
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UC8176_Refresh();
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}
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static void _setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
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{
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uint16_t xe = (x + w - 1) | 0x0007; // byte boundary inclusive (last byte)
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uint16_t ye = y + h - 1;
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x &= 0xFFF8; // byte boundary
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xe |= 0x0007; // byte boundary
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EPD_WriteCommand(CMD_PTL); // partial window
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EPD_WriteByte(x / 256);
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EPD_WriteByte(x % 256);
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EPD_WriteByte(xe / 256);
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EPD_WriteByte(xe % 256);
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EPD_WriteByte(y / 256);
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EPD_WriteByte(y % 256);
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EPD_WriteByte(ye / 256);
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EPD_WriteByte(ye % 256);
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EPD_WriteByte(0x01);
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}
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void UC8176_Write_Image(uint8_t *black, uint8_t *color, uint16_t x, uint16_t y, uint16_t w, uint16_t h)
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{
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epd_model_t *EPD = epd_get();
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uint16_t wb = (w + 7) / 8; // width bytes, bitmaps are padded
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x -= x % 8; // byte boundary
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w = wb * 8; // byte boundary
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if (x + w > EPD->width || y + h > EPD->height) return;
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EPD_WriteCommand(CMD_PTIN); // partial in
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_setPartialRamArea(x, y, w, h);
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if (EPD->bwr) {
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EPD_WriteCommand(CMD_DTM1);
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for (uint16_t i = 0; i < h; i++) {
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for (uint16_t j = 0; j < w / 8; j++) {
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EPD_WriteByte(black ? black[j + i * wb] : 0xFF);
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}
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}
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}
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EPD_WriteCommand(CMD_DTM2);
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for (uint16_t i = 0; i < h; i++) {
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for (uint16_t j = 0; j < w / 8; j++) {
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if (EPD->bwr) {
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uint8_t data = color ? color[j + i * wb] : 0xFF;
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EPD_WriteByte(EPD->invert_color ? ~data : data);
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} else {
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EPD_WriteByte(black[j + i * wb]);
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}
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}
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}
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EPD_WriteCommand(CMD_PTOUT); // partial out
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}
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/******************************************************************************
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function : Enter sleep mode
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parameter:
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******************************************************************************/
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void UC8176_Sleep(void)
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{
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UC8176_PowerOff();
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EPD_WriteCommand(CMD_DSLP);
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EPD_WriteByte(0xA5);
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}
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// Declare driver and models
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static epd_driver_t epd_drv_uc8176 = {
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.init = UC8176_Init,
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.clear = UC8176_Clear,
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.write_image = UC8176_Write_Image,
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.refresh = UC8176_Refresh,
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.sleep = UC8176_Sleep,
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.read_temp = UC8176_Read_Temp,
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.force_temp = UC8176_Force_Temp,
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};
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// UC8176 400x300 Black/White
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const epd_model_t epd_uc8176_420_bw = {
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.id = EPD_UC8176_420_BW,
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.drv = &epd_drv_uc8176,
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.width = 400,
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.height = 300,
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.bwr = false,
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.invert_color = false,
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};
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// UC8176 400x300 Black/White/Red
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const epd_model_t epd_uc8176_420_bwr = {
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.id = EPD_UC8176_420_BWR,
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.drv = &epd_drv_uc8176,
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.width = 400,
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.height = 300,
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.bwr = true,
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.invert_color = false,
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};
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// UC8276 400x300 Black/White/Red
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const epd_model_t epd_uc8276_420_bwr = {
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.id = EPD_UC8276_420_BWR,
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.drv = &epd_drv_uc8176,
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.width = 400,
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.height = 300,
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.bwr = true,
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.invert_color = true,
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};
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