use OTP lut for EPD_4in2

tsl0922 · Dec 11, 2024 · 8651365 · 8651365
1 parent 07b7b98
commit 8651365
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diff --git a/EPD/EPD_4in2.c b/EPD/EPD_4in2.c
@@ -30,53 +30,6 @@
 ******************************************************************************/
 #include "EPD_4in2.h"
 
-static const unsigned char EPD_4IN2_lut_vcom0[] = {
-    0x00, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x00, 0x0F, 0x0F, 0x00, 0x00, 0x01,	
-	0x00, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 					
-	};
-static const unsigned char EPD_4IN2_lut_ww[] = {
-	0x50, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01,	
-	0xA0, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	};
-static const unsigned char EPD_4IN2_lut_bw[] = {
-	0x50, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01,	
-	0xA0, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	};
-static const unsigned char EPD_4IN2_lut_wb[] = {
-	0xA0, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01,	
-	0x50, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	};
-static const unsigned char EPD_4IN2_lut_bb[] = {
-	0x20, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01,	
-	0x10, 0x08, 0x08, 0x00, 0x00, 0x02,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	
-	};
-
 /******************************************************************************
 function :	Software reset
 parameter:
@@ -147,75 +100,28 @@ void EPD_4IN2_TurnOnDisplay(void)
     EPD_4IN2_ReadBusy();
 }
 
-/******************************************************************************
-function :	set the look-up tables
-parameter:
-******************************************************************************/
-static void EPD_4IN2_SetLut(void)
-{
-	unsigned int count;
-	EPD_4IN2_SendCommand(0x20);
-	for(count=0;count<36;count++)	     
-		{EPD_4IN2_SendData(EPD_4IN2_lut_vcom0[count]);}
-
-	EPD_4IN2_SendCommand(0x21);
-	for(count=0;count<36;count++)	     
-		{EPD_4IN2_SendData(EPD_4IN2_lut_ww[count]);}   
-
-	EPD_4IN2_SendCommand(0x22);
-	for(count=0;count<36;count++)	     
-		{EPD_4IN2_SendData(EPD_4IN2_lut_bw[count]);} 
-
-	EPD_4IN2_SendCommand(0x23);
-	for(count=0;count<36;count++)	     
-		{EPD_4IN2_SendData(EPD_4IN2_lut_wb[count]);} 
-
-	EPD_4IN2_SendCommand(0x24);
-	for(count=0;count<36;count++)	     
-		{EPD_4IN2_SendData(EPD_4IN2_lut_bb[count]);}  
-}	
-
 /******************************************************************************
 function :	Initialize the e-Paper register
 parameter:
 ******************************************************************************/
 void EPD_4IN2_Init(void)
 {
 	EPD_4IN2_Reset();
-	EPD_4IN2_SendCommand(0x01);			// POWER SETTING 
-	EPD_4IN2_SendData (0x03);	        // VDS_EN, VDG_EN internal  
-	EPD_4IN2_SendData (0x00);           // VCOM_HV, VGHL_LV=16V
-	EPD_4IN2_SendData (0x2b);           // VDH=11V
-	EPD_4IN2_SendData (0x2b);           // VDL=11V
-
-	EPD_4IN2_SendCommand(0x06);         // boost soft start
-	EPD_4IN2_SendData (0x17);		    // A
-	EPD_4IN2_SendData (0x17);		    // B
-	EPD_4IN2_SendData (0x17);		    // C
 
 	EPD_4IN2_SendCommand(0x04);         // POWER ON
 	EPD_4IN2_ReadBusy();
 
 	EPD_4IN2_SendCommand(0x00);			// panel setting
-	EPD_4IN2_SendData(0x3f);		    // 300x400 B/W mode, LUT set by register
-
-
-	EPD_4IN2_SendCommand(0x30);			// PLL setting (clock frequency)
-	EPD_4IN2_SendData (0x3c);      	    // 3c=50HZ 3a=100HZ 29=150Hz 39=200HZ 31=171HZ
+	EPD_4IN2_SendData(0x1f);		    // 400x300 B/W mode, LUT from OTP
 
 	EPD_4IN2_SendCommand(0x61);			// resolution setting
 	EPD_4IN2_SendData (EPD_4IN2_WIDTH / 256);
 	EPD_4IN2_SendData (EPD_4IN2_WIDTH % 256);
 	EPD_4IN2_SendData (EPD_4IN2_HEIGHT / 256);
 	EPD_4IN2_SendData (EPD_4IN2_HEIGHT % 256);
 
-	EPD_4IN2_SendCommand(0x82);			// vcom_DC setting  	
-	EPD_4IN2_SendData (0x12);	        // -0.1 + 18 * -0.05 = -1.0V
-
 	EPD_4IN2_SendCommand(0x50);         // VCOM AND DATA INTERVAL SETTING
 	EPD_4IN2_SendData(0x97);            // LUTB=0 LUTW=1 interval=10
-
-	EPD_4IN2_SetLut();
 }
 
 /******************************************************************************

diff --git a/html/js/main.js b/html/js/main.js
@@ -71,6 +71,9 @@ async function sendCmWithData(cmd, data){
 }
 
 async function send4GrayLut() {
+	await sendcmd("0300");
+	await sendcmd("043F"); // Load LUT from register
+
 	await sendCmWithData("20", "000A0000000160141400000100140000000100130A010001000000000000000000000000000000000000"); // vcom
 	await sendCmWithData("21", "400A0000000190141400000110140A000001A01301000001000000000000000000000000000000000000"); // red not use
 	await sendCmWithData("22", "400A0000000190141400000100140A000001990C01030401000000000000000000000000000000000000"); // bw r
@@ -95,7 +98,7 @@ async function sendimg(cmdIMG) {
 	if (mode === "4gray") {
 		await send4GrayLut();
 		await sendcmd("05");
-		await sendcmd(`01${driver}`);
+		await sendcmd(`01${driver}`); // restore lut
 	} else {
 		await sendcmd("05");
 	}