Demo of 4DGL library for the uLCD-144-G2 128 by 128 color display. See https://mbed.org/users/4180_1/notebook/ulcd-144-g2-128-by-128-color-lcd/ for instructions

Dependencies:   4DGL-uLCD-SE mbed

Fork of uVGAII_demo by jim hamblen

The uLCD-144-G2 from 4D Systems is a low-cost ($25 qty. 100) smart color LCD display board with a serial interface. They are also available from Sparkfun. It looks like a nice alternative to the now hard to find Nokia 6100 LCD breakout boards. It has a TTL level serial interface and a reset pin. An optional uSD card inserted in the display module's socket can be used to load fonts, images, and play videos in response to serial commands. It has a built in system font and the driver supports the use of printfs, so it is very easy to use and hookup. Here is the wiring for the demo program:

mbeduLCD HeaderuLCD cable
5V=VU5V5V
GndGndGnd
TX=P9RXTX
RX=P10TXRX
P11ResetReset

/media/uploads/4180_1/ulcdpins.jpg

In the drawing above, the pins are labeled from the LCDs perspective with TX and RX pins. Mbed RX goes to LCD TX and mbed TX goes to LCD RX. So mbed TX goes to the middle pin on the connector which is the uVGA II RX pin. The included cable seen below is plugged into the bottom row of pins and plugged into a breadboard using the male header pins for hookup. Note that on the cable silkscreen seen in the image below RX and TX have been swapped to indicate the connections needed to the microprocessor pins.

/media/uploads/4180_1/150mm_5_way_female-female_jumper_cable_dsc_2303.jpg /media/uploads/4180_1/5_way_male-male_adaptor_dsc_2299.jpg

// uLCD-144-G2 basic text demo program for uLCD-4GL LCD driver library
//
#include "mbed.h"
#include "uLCD_4DGL.h"

uLCD_4DGL uLCD(p9,p10,p11); // serial tx, serial rx, reset pin;

int main()
{
    // basic printf demo = 16 by 18 characters on screen
    uLCD.printf("\nHello uLCD World\n"); //Default Green on black text
    uLCD.printf("\n  Starting Demo...");
    uLCD.text_width(4); //4X size text
    uLCD.text_height(4);
    uLCD.color(RED);
    for (int i=10; i>=0; --i) {
        uLCD.locate(1,2);
        uLCD.printf("%2D",i);
        wait(.5);
    }
}


Video of longer demo code with both text and graphics. A micro SD card on the LCD module is required for the images and videos seen at the end of the video. The display is actually a bit more colorful and clearer than it appears in the video. Demos include text using printfs, basic graphics commands, a simple bouncing ball animation, computing the Mandelbrot set pixel by pixel, a Plasma wave BLIT, a JPEG image, and a *.wmv video clip.

See https://mbed.org/users/4180_1/notebook/ulcd-144-g2-128-by-128-color-lcd/ for complete info, wiring, breadboard hints on avoiding the use of the cable, and how to work with fonts, images, and videos on the uSD card

Committer:
4180_1
Date:
Fri Nov 22 02:45:05 2013 +0000
Revision:
6:f752accd632c
Parent:
5:a1ef40ff0f78
Child:
7:7bd7397ab89f
ver1.4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
4180_1 0:cfcf73272647 1 //
4180_1 0:cfcf73272647 2 // TFT_4DGL is a class to drive 4D Systems TFT touch screens
4180_1 0:cfcf73272647 3 //
4180_1 0:cfcf73272647 4 // Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr>
4180_1 0:cfcf73272647 5 //
4180_1 0:cfcf73272647 6 // TFT_4DGL is free software: you can redistribute it and/or modify
4180_1 0:cfcf73272647 7 // it under the terms of the GNU General Public License as published by
4180_1 0:cfcf73272647 8 // the Free Software Foundation, either version 3 of the License, or
4180_1 0:cfcf73272647 9 // (at your option) any later version.
4180_1 0:cfcf73272647 10 //
4180_1 0:cfcf73272647 11 // TFT_4DGL is distributed in the hope that it will be useful,
4180_1 0:cfcf73272647 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
4180_1 0:cfcf73272647 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4180_1 0:cfcf73272647 14 // GNU General Public License for more details.
4180_1 0:cfcf73272647 15 //
4180_1 0:cfcf73272647 16 // You should have received a copy of the GNU General Public License
4180_1 0:cfcf73272647 17 // along with TFT_4DGL. If not, see <http://www.gnu.org/licenses/>.
4180_1 0:cfcf73272647 18
4180_1 0:cfcf73272647 19 #include "mbed.h"
4180_1 2:75727e89a717 20 #include "uLCD_4DGL.h"
4180_1 0:cfcf73272647 21
4180_1 6:f752accd632c 22 //#define SIZE_X 128
4180_1 6:f752accd632c 23 //#define SIZE_Y 128
4180_1 1:38ef731c7bdf 24 //
4180_1 1:38ef731c7bdf 25
4180_1 2:75727e89a717 26 uLCD_4DGL uLCD(p9,p10,p11); // serial tx, serial rx, reset pin;
4180_1 0:cfcf73272647 27
4180_1 2:75727e89a717 28 int main()
4180_1 2:75727e89a717 29 {
4180_1 6:f752accd632c 30
4180_1 3:454d1f4c8fd7 31 // basic printf demo = 16 by 18 characters on screen
4180_1 3:454d1f4c8fd7 32 uLCD.printf("\nHello uLCD World\n"); //Default Green on black text
4180_1 3:454d1f4c8fd7 33 uLCD.printf("\n Starting Demo...");
4180_1 3:454d1f4c8fd7 34 uLCD.text_width(4); //4X size text
4180_1 3:454d1f4c8fd7 35 uLCD.text_height(4);
4180_1 3:454d1f4c8fd7 36 uLCD.color(RED);
4180_1 3:454d1f4c8fd7 37 for (int i=10; i>=0; --i) {
4180_1 3:454d1f4c8fd7 38 uLCD.locate(1,2);
4180_1 3:454d1f4c8fd7 39 uLCD.printf("%2D",i);
4180_1 3:454d1f4c8fd7 40 wait(.5);
4180_1 3:454d1f4c8fd7 41 }
4180_1 3:454d1f4c8fd7 42 uLCD.cls();
4180_1 6:f752accd632c 43 uLCD.baudrate(600000); //jack up baud rate to max for fast display
4180_1 6:f752accd632c 44 //if demo hangs here - try lower baud rates
4180_1 6:f752accd632c 45 //demo graphics commands
4180_1 2:75727e89a717 46 uLCD.background_color(DGREY);
4180_1 2:75727e89a717 47 uLCD.circle(60, 50, 30, 0xFF00FF);
4180_1 2:75727e89a717 48 uLCD.triangle(120, 100, 40, 40, 10, 100, 0x0000FF);
4180_1 2:75727e89a717 49 uLCD.line(0, 0, 80, 60, 0xFF0000);
4180_1 2:75727e89a717 50 uLCD.rectangle(50, 50, 100, 90, 0x00FF00);
4180_1 2:75727e89a717 51 uLCD.pixel(60, 60, BLACK);
4180_1 2:75727e89a717 52 uLCD.read_pixel(120, 70);
4180_1 2:75727e89a717 53 uLCD.circle(120, 60, 10, BLACK);
4180_1 3:454d1f4c8fd7 54 uLCD.set_font(FONT_7X8);
4180_1 2:75727e89a717 55 uLCD.text_mode(TRANSPARENT);
4180_1 6:f752accd632c 56 uLCD.text_bold(ON);
4180_1 2:75727e89a717 57 uLCD.text_char('B', 9, 8, BLACK);
4180_1 2:75727e89a717 58 uLCD.text_char('I',10, 8, BLACK);
4180_1 2:75727e89a717 59 uLCD.text_char('G',11, 8, BLACK);
4180_1 6:f752accd632c 60 uLCD.text_italic(ON);
4180_1 3:454d1f4c8fd7 61 uLCD.text_string("This is a test of string", 1, 4, FONT_7X8, WHITE);
4180_1 3:454d1f4c8fd7 62 wait(2);
4180_1 3:454d1f4c8fd7 63 // printf text only mode demo
4180_1 3:454d1f4c8fd7 64 uLCD.background_color(BLUE);
4180_1 3:454d1f4c8fd7 65 uLCD.cls();
4180_1 3:454d1f4c8fd7 66 uLCD.locate(0,0);
4180_1 3:454d1f4c8fd7 67 uLCD.color(WHITE);
4180_1 3:454d1f4c8fd7 68 uLCD.textbackground_color(BLUE);
4180_1 3:454d1f4c8fd7 69 uLCD.set_font(FONT_7X8);
4180_1 3:454d1f4c8fd7 70 uLCD.text_mode(OPAQUE);
4180_1 3:454d1f4c8fd7 71 int i=0;
4180_1 3:454d1f4c8fd7 72 while(i<64) {
4180_1 3:454d1f4c8fd7 73 if(i%16==0) uLCD.cls();
4180_1 3:454d1f4c8fd7 74 uLCD.printf("TxtLine %2D Page %D\n",i%16,i/16 );
4180_1 3:454d1f4c8fd7 75 i++; //16 lines with 18 charaters per line
4180_1 3:454d1f4c8fd7 76 }
4180_1 6:f752accd632c 77 wait(0.5);
4180_1 6:f752accd632c 78 //Bouncing Ball Demo
4180_1 6:f752accd632c 79 int x=50,y=21,vx=1,vy=1, radius=4;
4180_1 4:25a266a74a4c 80 uLCD.background_color(BLACK);
4180_1 4:25a266a74a4c 81 uLCD.cls();
4180_1 6:f752accd632c 82 //draw walls
4180_1 6:f752accd632c 83 uLCD.line(0, 0, 127, 0, WHITE);
4180_1 6:f752accd632c 84 uLCD.line(127, 0, 127, 127, WHITE);
4180_1 6:f752accd632c 85 uLCD.line(127, 127, 0, 127, WHITE);
4180_1 6:f752accd632c 86 uLCD.line(0, 127, 0, 0, WHITE);
4180_1 6:f752accd632c 87 for (int i=0; i<1000; i++) {
4180_1 6:f752accd632c 88 //draw ball
4180_1 6:f752accd632c 89 uLCD.circle(x, y, radius, RED);
4180_1 6:f752accd632c 90 //bounce off edge walls?
4180_1 6:f752accd632c 91 if ((x<=radius+1) || (x>=126-radius)) vx = -vx;
4180_1 6:f752accd632c 92 if ((y<=radius+1) || (y>=126-radius)) vy = -vy;
4180_1 6:f752accd632c 93 //erase old ball location
4180_1 6:f752accd632c 94 uLCD.circle(x, y, radius, BLACK);
4180_1 6:f752accd632c 95 //move ball
4180_1 6:f752accd632c 96 x=x+vx;
4180_1 6:f752accd632c 97 y=y+vy;
4180_1 4:25a266a74a4c 98 }
4180_1 6:f752accd632c 99 wait(1);
4180_1 3:454d1f4c8fd7 100 //draw an image pixel by pixel
4180_1 6:f752accd632c 101 int pixelcolors[50][50];
4180_1 3:454d1f4c8fd7 102 uLCD.background_color(BLACK);
4180_1 3:454d1f4c8fd7 103 uLCD.cls();
4180_1 6:f752accd632c 104 //compute Mandelbrot set image for display
4180_1 3:454d1f4c8fd7 105 //image size in pixels and setup
4180_1 3:454d1f4c8fd7 106 const unsigned ImageHeight=128;
4180_1 3:454d1f4c8fd7 107 const unsigned ImageWidth=128;
4180_1 6:f752accd632c 108 //region to display
4180_1 3:454d1f4c8fd7 109 double MinRe = -0.75104;
4180_1 3:454d1f4c8fd7 110 double MaxRe = -0.7408;
4180_1 3:454d1f4c8fd7 111 double MinIm = 0.10511;
4180_1 3:454d1f4c8fd7 112 double MaxIm = MinIm+(MaxRe-MinRe)*ImageHeight/ImageWidth;
4180_1 3:454d1f4c8fd7 113 double Re_factor = (MaxRe-MinRe)/(ImageWidth-1);
4180_1 3:454d1f4c8fd7 114 double Im_factor = (MaxIm-MinIm)/(ImageHeight-1);
4180_1 3:454d1f4c8fd7 115 unsigned MaxIterations = 4096;
4180_1 3:454d1f4c8fd7 116 for(unsigned y=0; y<ImageHeight; ++y) {
4180_1 3:454d1f4c8fd7 117 double c_im = MaxIm - y*Im_factor;
4180_1 3:454d1f4c8fd7 118 for(unsigned x=0; x<ImageWidth; ++x) {
4180_1 3:454d1f4c8fd7 119 double c_re = MinRe + x*Re_factor;
4180_1 3:454d1f4c8fd7 120 double Z_re = c_re, Z_im = c_im;
4180_1 3:454d1f4c8fd7 121 int niterations=0;
4180_1 3:454d1f4c8fd7 122 for(unsigned n=0; n<MaxIterations; ++n) {
4180_1 3:454d1f4c8fd7 123 double Z_re2 = Z_re*Z_re, Z_im2 = Z_im*Z_im;
4180_1 3:454d1f4c8fd7 124 if(Z_re2 + Z_im2 > 4) {
4180_1 3:454d1f4c8fd7 125 niterations = n;
4180_1 3:454d1f4c8fd7 126 break;
4180_1 3:454d1f4c8fd7 127 }
4180_1 3:454d1f4c8fd7 128 Z_im = 2*Z_re*Z_im + c_im;
4180_1 3:454d1f4c8fd7 129 Z_re = Z_re2 - Z_im2 + c_re;
4180_1 3:454d1f4c8fd7 130 }
4180_1 6:f752accd632c 131 if (niterations!=(MaxIterations-1))
4180_1 6:f752accd632c 132 uLCD.pixel(x,y,((niterations & 0xF00)<<12)+((niterations & 0xF0)<<8)+((niterations & 0x0F)<<4) );
4180_1 3:454d1f4c8fd7 133 }
4180_1 3:454d1f4c8fd7 134 }
4180_1 5:a1ef40ff0f78 135 wait(5);
4180_1 6:f752accd632c 136 // PLASMA wave BLIT animation
4180_1 6:f752accd632c 137 //draw an image using BLIT (Block Image Transfer) fastest way to transfer pixel data
4180_1 5:a1ef40ff0f78 138 uLCD.cls();
4180_1 6:f752accd632c 139 int num_cols=50;
4180_1 6:f752accd632c 140 int num_rows=50;
4180_1 5:a1ef40ff0f78 141 double a,b,c=0.0;
4180_1 5:a1ef40ff0f78 142 while(1) {
4180_1 5:a1ef40ff0f78 143 for (int k=0; k<num_cols; k++) {
4180_1 5:a1ef40ff0f78 144 b= (1+sin(3.14159*k*0.75/(num_cols-1.0)+c))*0.5;
4180_1 5:a1ef40ff0f78 145 for (int i=0; i<num_rows; i++) {
4180_1 5:a1ef40ff0f78 146 a= (1+sin(3.14159*i*0.75/(num_rows-1.0)+c))*0.5;
4180_1 5:a1ef40ff0f78 147 // a and b will be a sine wave output between 0 and 1
4180_1 5:a1ef40ff0f78 148 // sine wave was scaled for nice effect across array
4180_1 5:a1ef40ff0f78 149 // uses a and b to compute pixel colors based on rol and col location in array
4180_1 5:a1ef40ff0f78 150 // also keeps colors at the same brightness level
4180_1 5:a1ef40ff0f78 151 if ((a+b) <.667)
4180_1 6:f752accd632c 152 pixelcolors[i][k] = (255-(int(254.0*((a+b)/0.667)))<<16) | (int(254.0*((a+b)/0.667))<<8) | 0;
4180_1 5:a1ef40ff0f78 153 else if ((a+b)<1.333)
4180_1 6:f752accd632c 154 pixelcolors[i][k] = (0 <<16) | (255-(int (254.0*((a+b-0.667)/0.667)))<<8) | int(254.0*((a+b-0.667)/0.667));
4180_1 5:a1ef40ff0f78 155 else
4180_1 6:f752accd632c 156 pixelcolors[i][k] = (int(255*((a+b-1.333)/0.667))<<16) | (0<<8) | (255-(int (254.0*((a+b-1.333)/0.667))));
4180_1 5:a1ef40ff0f78 157 }
4180_1 5:a1ef40ff0f78 158 }
4180_1 6:f752accd632c 159 uLCD.BLIT(39, 39, 50, 50, &pixelcolors[0][0]);
4180_1 5:a1ef40ff0f78 160 c = c + 0.0314159*3.0;
4180_1 5:a1ef40ff0f78 161 if (c > 6.2831) c = 0.0;
4180_1 5:a1ef40ff0f78 162 }
4180_1 6:f752accd632c 163 }