226 lines
7.4 KiB
C
226 lines
7.4 KiB
C
/*****************************************************************************
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* | File : EPD_4in37b.c
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* | Author : Waveshare team
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* | Function : 4.37inch e-paper b
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* | Info :
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*----------------
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* | This version: V1.0
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* | Date : 2021-01-07
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* | Info :
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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_4in37b.h"
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#include "Debug.h"
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/******************************************************************************
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function : Software reset
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parameter:
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******************************************************************************/
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static void EPD_4IN37B_Reset(void)
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{
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DEV_Digital_Write(EPD_RST_PIN, 1);
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DEV_Delay_ms(200);
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DEV_Digital_Write(EPD_RST_PIN, 0);
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DEV_Delay_ms(2);
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DEV_Digital_Write(EPD_RST_PIN, 1);
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DEV_Delay_ms(200);
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}
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/******************************************************************************
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function : send command
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parameter:
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Reg : Command register
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******************************************************************************/
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static void EPD_4IN37B_SendCommand(UBYTE Reg)
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{
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DEV_Digital_Write(EPD_DC_PIN, 0);
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DEV_Digital_Write(EPD_CS_PIN, 0);
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DEV_SPI_WriteByte(Reg);
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DEV_Digital_Write(EPD_CS_PIN, 1);
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}
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/******************************************************************************
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function : send data
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parameter:
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Data : Write data
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******************************************************************************/
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static void EPD_4IN37B_SendData(UBYTE Data)
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{
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DEV_Digital_Write(EPD_DC_PIN, 1);
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DEV_Digital_Write(EPD_CS_PIN, 0);
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DEV_SPI_WriteByte(Data);
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DEV_Digital_Write(EPD_CS_PIN, 1);
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}
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/******************************************************************************
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function : Wait until the busy_pin goes LOW
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parameter:
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******************************************************************************/
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static void EPD_4IN37B_ReadBusy(void)
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{
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Debug("e-Paper busy\r\n");
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DEV_Delay_ms(50);
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while(DEV_Digital_Read(EPD_BUSY_PIN) == 0) { //LOW: idle, HIGH: busy
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DEV_Delay_ms(10);
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}
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DEV_Delay_ms(50);
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Debug("e-Paper busy release\r\n");
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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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static void EPD_4IN37B_TurnOnDisplay(void)
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{
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EPD_4IN37B_SendCommand(0x12);
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EPD_4IN37B_ReadBusy();
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}
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/******************************************************************************
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function : Setting the display window
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parameter:
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******************************************************************************/
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static void EPD_4IN37B_SetWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend)
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{
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EPD_4IN37B_SendCommand(0x90);
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EPD_4IN37B_SendData(Xstart & 0xf8);
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EPD_4IN37B_SendData(Xend | 0x07);
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EPD_4IN37B_SendData((Ystart >> 8) & 0x01);
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EPD_4IN37B_SendData(Ystart & 0xFF);
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EPD_4IN37B_SendData((Yend >> 8) & 0x01);
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EPD_4IN37B_SendData(Yend & 0xFF);
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EPD_4IN37B_SendData(0x01);
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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 EPD_4IN37B_Init(void)
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{
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EPD_4IN37B_Reset();
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EPD_4IN37B_SendCommand(0x04);//soft reset
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EPD_4IN37B_ReadBusy();
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EPD_4IN37B_SendCommand(0X00); //PANNEL SETTING
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EPD_4IN37B_SendData(0x0F); //KW-3f KWR-2F BWROTP 0f BWOTP 1f
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}
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/******************************************************************************
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function : Sends the image buffer in RAM to e-Paper and displays
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parameter:
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******************************************************************************/
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void EPD_4IN37B_Display(UBYTE *ImageBlack, UBYTE*ImageRed)
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{
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UWORD Width, Height;
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Width = (EPD_4IN37B_WIDTH % 8 == 0)? (EPD_4IN37B_WIDTH / 8 ): (EPD_4IN37B_WIDTH / 8 + 1);
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Height = EPD_4IN37B_HEIGHT;
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EPD_4IN37B_SendCommand(0x10);
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for (UWORD j = 0; j < Height; j++) {
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for (UWORD i = 0; i < Width; i++) {
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EPD_4IN37B_SendData(ImageBlack[i + j * Width]);
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}
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}
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EPD_4IN37B_SendCommand(0x13);
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for (UWORD j = 0; j < Height; j++) {
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for (UWORD i = 0; i < Width; i++) {
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EPD_4IN37B_SendData(~ImageRed[i + j * Width]);
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}
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}
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EPD_4IN37B_TurnOnDisplay();
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}
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void EPD_4IN37B_Display_Part(UBYTE *ImageBlack, UBYTE *ImageRed, UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend)
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{
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UWORD Width, Height;
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Width = Xend - Xstart;
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Height = Yend - Ystart;
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Width = (Width % 8 == 0)? (Width / 8 ): (Width / 8 + 1);
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if(Xstart % 8 != 0) {
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Xstart += 8;
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if(Xstart > Xend) {
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printf("Xstart must be a multiple of 8 and not more than Xend \r\n");
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return;
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}
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}
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EPD_4IN37B_SetWindows(Xstart, Ystart, Xend-1, Yend-1);
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EPD_4IN37B_SendCommand(0x91);
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EPD_4IN37B_SendCommand(0x10);
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for (UWORD j = 0; j < Height; j++) {
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for (UWORD i = 0; i < Width; i++) {
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EPD_4IN37B_SendData(ImageBlack[i + j * Width]);
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}
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}
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EPD_4IN37B_SendCommand(0x13);
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for (UWORD j = 0; j < Height; j++) {
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for (UWORD i = 0; i < Width; i++) {
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EPD_4IN37B_SendData(~ImageRed[i + j * Width]);
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}
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}
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EPD_4IN37B_SendCommand(0x92);
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EPD_4IN37B_TurnOnDisplay();
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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 EPD_4IN37B_Clear(void)
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{
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UWORD Width, Height;
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Width = (EPD_4IN37B_WIDTH % 8 == 0)? (EPD_4IN37B_WIDTH / 8 ): (EPD_4IN37B_WIDTH / 8 + 1);
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Height = EPD_4IN37B_HEIGHT;
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EPD_4IN37B_SendCommand(0x10);
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for (UWORD j = 0; j < Height; j++) {
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for (UWORD i = 0; i < Width; i++) {
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EPD_4IN37B_SendData(0xff);
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}
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}
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EPD_4IN37B_SendCommand(0x13);
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for (UWORD j = 0; j < Height; j++) {
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for (UWORD i = 0; i < Width; i++) {
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EPD_4IN37B_SendData(0x00);
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}
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}
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EPD_4IN37B_TurnOnDisplay();
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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 EPD_4IN37B_Sleep(void)
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{
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EPD_4IN37B_SendCommand(0x02);
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DEV_Delay_ms(100);
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EPD_4IN37B_SendCommand(0x07);
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EPD_4IN37B_SendData(0xa5);
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}
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