jim hamblen / Mbed 2 deprecated uLCD144G2_demo

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

Files at this revision

API Documentation at this revision

Revision 6:f752accd632c, committed 2013-11-22

Comitter:
4180_1
Date:
Fri Nov 22 02:45:05 2013 +0000
Parent:
5:a1ef40ff0f78
Child:
7:7bd7397ab89f
Commit message:
ver1.4

Changed in this revision

4DGL-uLCD-SE.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- a/4DGL-uLCD-SE.lib	Wed Nov 20 03:26:19 2013 +0000
+++ b/4DGL-uLCD-SE.lib	Fri Nov 22 02:45:05 2013 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/4180_1/code/4DGL-uLCD-SE/#74df7fc26fef
+http://mbed.org/users/4180_1/code/4DGL-uLCD-SE/#8936798c19a3

--- a/main.cpp	Wed Nov 20 03:26:19 2013 +0000
+++ b/main.cpp	Fri Nov 22 02:45:05 2013 +0000
@@ -19,15 +19,15 @@
 #include "mbed.h"
 #include "uLCD_4DGL.h"
 
-#define SIZE_X  128
-#define SIZE_Y  128
+//#define SIZE_X  128
+//#define SIZE_Y  128
 //
 
 uLCD_4DGL uLCD(p9,p10,p11); // serial tx, serial rx, reset pin;
 
 int main()
 {
-    int pixelcolors[40][40];
+
     // 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...");
@@ -40,8 +40,9 @@
         wait(.5);
     }
     uLCD.cls();
-    uLCD.baudrate(256000); //jack up baud rate to max
-    //demo graphics
+    uLCD.baudrate(600000); //jack up baud rate to max for fast display
+    //if demo hangs here - try lower baud rates
+    //demo graphics commands
     uLCD.background_color(DGREY);
     uLCD.circle(60, 50, 30, 0xFF00FF);
     uLCD.triangle(120, 100, 40, 40, 10, 100, 0x0000FF);
@@ -52,9 +53,11 @@
     uLCD.circle(120, 60, 10, BLACK);
     uLCD.set_font(FONT_7X8);
     uLCD.text_mode(TRANSPARENT);
+    uLCD.text_bold(ON);
     uLCD.text_char('B', 9, 8, BLACK);
     uLCD.text_char('I',10, 8, BLACK);
     uLCD.text_char('G',11, 8, BLACK);
+    uLCD.text_italic(ON);
     uLCD.text_string("This is a test of string", 1, 4, FONT_7X8, WHITE);
     wait(2);
     // printf text only mode demo
@@ -71,23 +74,38 @@
         uLCD.printf("TxtLine %2D Page %D\n",i%16,i/16 );
         i++; //16 lines with 18 charaters per line
     }
-//draw an image using BLIT (Block Image Transfer) fastest way to transfer pixel data
+    wait(0.5);
+//Bouncing Ball Demo
+    int x=50,y=21,vx=1,vy=1, radius=4;
     uLCD.background_color(BLACK);
     uLCD.cls();
-    for(int i=0; i<40; i++) {
-        for(int k=0; k<40; k++) {
-            pixelcolors[i][k] = RED;
-        }
+    //draw walls
+    uLCD.line(0, 0, 127, 0, WHITE);
+    uLCD.line(127, 0, 127, 127, WHITE);
+    uLCD.line(127, 127, 0, 127, WHITE);
+    uLCD.line(0, 127, 0, 0, WHITE);
+    for (int i=0; i<1000; i++) {
+        //draw ball
+        uLCD.circle(x, y, radius, RED);
+        //bounce off edge walls?
+        if ((x<=radius+1) || (x>=126-radius)) vx = -vx;
+        if ((y<=radius+1) || (y>=126-radius)) vy = -vy;
+        //erase old ball location
+        uLCD.circle(x, y, radius, BLACK);
+        //move ball
+        x=x+vx;
+        y=y+vy;
     }
-    uLCD.BLIT(50, 50, 40, 40, &pixelcolors[0][0]);
-    wait(5);
+    wait(1);
 //draw an image pixel by pixel
+    int pixelcolors[50][50];
     uLCD.background_color(BLACK);
     uLCD.cls();
-//compute Mandelbrot image for display
+//compute Mandelbrot set image for display
 //image size in pixels and  setup
     const unsigned ImageHeight=128;
     const unsigned ImageWidth=128;
+    //region to display
     double MinRe = -0.75104;
     double MaxRe = -0.7408;
     double MinIm = 0.10511;
@@ -100,26 +118,26 @@
         for(unsigned x=0; x<ImageWidth; ++x) {
             double c_re = MinRe + x*Re_factor;
             double Z_re = c_re, Z_im = c_im;
-            bool isInside = true;
             int niterations=0;
             for(unsigned n=0; n<MaxIterations; ++n) {
                 double Z_re2 = Z_re*Z_re, Z_im2 = Z_im*Z_im;
                 if(Z_re2 + Z_im2 > 4) {
                     niterations = n;
-                    isInside = false;
                     break;
                 }
                 Z_im = 2*Z_re*Z_im + c_im;
                 Z_re = Z_re2 - Z_im2 + c_re;
             }
-            if(isInside==false) uLCD.pixel(x,y,((niterations & 0xF00)<<12)+((niterations & 0xF0)<<8)+((niterations & 0x0F)<<4) );
+            if (niterations!=(MaxIterations-1))
+                uLCD.pixel(x,y,((niterations & 0xF00)<<12)+((niterations & 0xF0)<<8)+((niterations & 0x0F)<<4) );
         }
     }
     wait(5);
-    // PLASMA wave BLIT animation
+// PLASMA wave BLIT animation
+//draw an image using BLIT (Block Image Transfer) fastest way to transfer pixel data
     uLCD.cls();
-    int num_cols=40;
-    int num_rows=40;
+    int num_cols=50;
+    int num_rows=50;
     double a,b,c=0.0;
     while(1) {
         for (int k=0; k<num_cols; k++) {
@@ -131,15 +149,15 @@
                 // uses a and b to compute pixel colors based on rol and col location in array
                 // also keeps colors at the same brightness level
                 if ((a+b) <.667)
-                    pixelcolors[i][k] =  (255-(int(240.0*((a+b)/0.667)))<<16) | (int(240.0*((a+b)/0.667))<<8) | 0;
+                    pixelcolors[i][k] =  (255-(int(254.0*((a+b)/0.667)))<<16) | (int(254.0*((a+b)/0.667))<<8) | 0;
                 else if ((a+b)<1.333)
-                    pixelcolors[i][k] = (0 <<16) | (255-(int (240.0*((a+b-0.667)/0.667)))<<8) | int(240.0*((a+b-0.667)/0.667));
+                    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));
                 else
-                    pixelcolors[i][k] = (int(255*((a+b-1.333)/0.667))<<16) | (0<<8)  | (255-(int (240.0*((a+b-1.333)/0.667))));
+                    pixelcolors[i][k] = (int(255*((a+b-1.333)/0.667))<<16) | (0<<8)  | (255-(int (254.0*((a+b-1.333)/0.667))));
             }
         }
-        uLCD.BLIT(50, 50, 40, 40, &pixelcolors[0][0]);
+        uLCD.BLIT(39, 39, 50, 50, &pixelcolors[0][0]);
         c = c + 0.0314159*3.0;
         if (c > 6.2831) c = 0.0;
     }
-}
\ No newline at end of file
+}

--- a/mbed.bld	Wed Nov 20 03:26:19 2013 +0000
+++ b/mbed.bld	Fri Nov 22 02:45:05 2013 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/9114680c05da
+http://mbed.org/users/mbed_official/code/mbed/builds/f37f3b9c9f0b
\ No newline at end of file