//--------------------------------------------------------- /* NHD_7_0_800480EF_mega.ino Program for writing to Newhaven Display 7.0” TFT with NHD-5.0-800480TF-20 Controller Board (SSD1963, 8-bit) (c)2013 Mike LaVine - Newhaven Display International, LLC. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. */ //--------------------------------------------------------- // The 8 bit data bus is connected to PORTA of the Arduino Mega2560 // 5V voltage regulator on Arduino Mega has been replaced with a 3.3V regulator to provide 3.3V logic int RS = 30; // RS signal connected to Arduino digital pin 30 int WR = 31; // /WR signal connected to Arduino digital pin 31 int RD = 32; // /RD signal connected to Arduino digital pin 32 int RES = 33; // /RES signal connected to Arduino digital pin 33 int DIS = 34; // DISP signal connected to Arduino digital pin 34 // /CS signal tied to GND //;****************************************************************************** void TFT_Write_Command(unsigned char command) { digitalWrite(RS, LOW); PORTA = command; digitalWrite(WR, LOW); digitalWrite(WR, HIGH); } //;****************************************************************************** void TFT_Write_Data(unsigned char data) { //digitalWrite(RS, HIGH); PORTA = data; digitalWrite(WR, LOW); digitalWrite(WR, HIGH); } //==================================================== void TFT_Command_Write(unsigned char REG,unsigned char VALUE) { TFT_Write_Command(REG); digitalWrite(RS, HIGH); TFT_Write_Data(VALUE); } //====================================================== void WindowSet(unsigned int s_x,unsigned int e_x,unsigned int s_y,unsigned int e_y) { TFT_Write_Command(0x2a); //SET column address digitalWrite(RS, HIGH); TFT_Write_Data((s_x)>>8); //SET start column address TFT_Write_Data(s_x); TFT_Write_Data((e_x)>>8); //SET end column address TFT_Write_Data(e_x); TFT_Write_Command(0x2b); //SET page address digitalWrite(RS, HIGH); TFT_Write_Data((s_y)>>8); //SET start page address TFT_Write_Data(s_y); TFT_Write_Data((e_y)>>8); //SET end page address TFT_Write_Data(e_y); } void disp() { unsigned int i, j; WindowSet(0,799,0,479); //set start/end column/page address (full screen) TFT_Write_Command(0x2C); //command to begin writing to frame memory digitalWrite(RS, HIGH); for(i=0;i<480;i++) //fill screen with blue pixels { for(j=0;j<800;j++) { TFT_Write_Data(0xFF); TFT_Write_Data(0x00); TFT_Write_Data(0x00); } } WindowSet(0,799,0,479); //set start/end column/page address (full screen) TFT_Write_Command(0x2C); //command to begin writing to frame memory digitalWrite(RS, HIGH); for(i=0;i<480;i++) //fill screen with green pixels { for(j=0;j<800;j++) { TFT_Write_Data(0x00); TFT_Write_Data(0xFF); TFT_Write_Data(0x00); } } WindowSet(0,799,0,479); //set start/end column/page address (full screen) TFT_Write_Command(0x2C); //command to begin writing to frame memory digitalWrite(RS, HIGH); for(i=0;i<480;i++) //fill screen with red pixels { for(j=0;j<800;j++) { TFT_Write_Data(0x00); TFT_Write_Data(0x00); TFT_Write_Data(0xFF); } } } //====================================================== void setup() { DDRA = 0xFF; PORTA = 0x00; DDRC = 0xFF; PORTC = 0x00; digitalWrite(DIS, HIGH); digitalWrite(RD, HIGH); digitalWrite(WR, LOW); digitalWrite(RES, LOW); delay(120); digitalWrite(RES, HIGH); delay(120); TFT_Write_Command(0x01); //Software reset delay(120); TFT_Write_Command(0xe2); //set multiplier and divider of PLL digitalWrite(RS, HIGH); TFT_Write_Data(0x1d); TFT_Write_Data(0x02); TFT_Write_Data(0x04); TFT_Command_Write(0xe0,0x01); //Enable PLL delay(1); TFT_Command_Write(0xe0,0x03); //Lock PLL TFT_Write_Command(0x01); //Software reset delay(120); TFT_Write_Command(0xb0); //SET LCD MODE SET TFT 18Bits MODE digitalWrite(RS, HIGH); TFT_Write_Data(0x08); //SET TFT MODE & hsync+Vsync+DEN MODE TFT_Write_Data(0x80); //SET TFT MODE & hsync+Vsync+DEN MODE TFT_Write_Data(0x03); //SET horizontal size=800-1 HightByte TFT_Write_Data(0x1f); //SET horizontal size=800-1 LowByte TFT_Write_Data(0x01); //SET vertical size=480-1 HightByte TFT_Write_Data(0xdf); //SET vertical size=480-1 LowByte TFT_Write_Data(0x00); //SET even/odd line RGB seq.=RGB TFT_Command_Write(0xf0,0x00); //SET pixel data I/F format=8bit TFT_Command_Write(0x36,0x09); //SET address mode=flip vertical TFT_Write_Command(0xe6); //SET PCLK freq digitalWrite(RS, HIGH); TFT_Write_Data(0x0f); TFT_Write_Data(0xff); TFT_Write_Data(0xff); TFT_Write_Command(0xb4); //SET HBP digitalWrite(RS, HIGH); TFT_Write_Data(0x04); //SET HSYNC Total=1056 TFT_Write_Data(0x20); TFT_Write_Data(0x00); //SET HBP 88 TFT_Write_Data(0x58); TFT_Write_Data(0x80); //SET HSYNC Pulse Width=128=127pixels+1 TFT_Write_Data(0x00); //SET Hsync pulse start position TFT_Write_Data(0x00); TFT_Write_Data(0x00); //SET Hsync pulse subpixel start position TFT_Write_Command(0xb6); //SET VBP digitalWrite(RS, HIGH); TFT_Write_Data(0x02); //SET Vsync total 525 TFT_Write_Data(0x0d); TFT_Write_Data(0x00); //SET VBP=32 TFT_Write_Data(0x20); TFT_Write_Data(0x01); //SET VSYNC Pulse Width= 0=0lines+1 TFT_Write_Data(0x00); //SET Vsync pulse start position TFT_Write_Data(0x00); TFT_Write_Command(0x13); //SET display on TFT_Write_Command(0x38); //SET display on TFT_Write_Command(0x29); //SET display on delay(10); } void loop() { disp(); delay(1000); }