Hi All,
I am trying to create a message board using a 128x64 LCD screen. The one I have is this one from Jaycar: https://www.jaycar.com.au/arduino-compatible-128x64-dot-matrix-lcd-display-module/p/XC4617
I am using an Arduino Uno R3
The datasheet is here: https://www.jaycar.com.au/medias/sys_master/images/images/10222065909790/XC4617-dataSheetMain.pdf
The setup I have so far is here:
Yes, I realised after taking the photo that the yellow wire was broken off. That was from turning the screen over to get a photo of the pin details.
Please don't shoot me for soldering these in. The store I visited for the screen did not have header strips in stock. I'll grab one elsewhere tomorrow.
So, what am I trying to do? Well, at this point I am trying to do a "Hello World" test to make sure things are wired up correctly and that I am using the correct comment line and the correct settings for the pins to match the U8GLIB settings. I currently have the below comment running, but so far no luck. Once I have it running, I want to have a message board that rotates through the preset messages each day.
U8GLIB_ST7920_128X64_1X u8g(10, 11, 13)
The default in the library was set as U8GLIB_ST7920_128X64_1X u8g(18, 16, 17)
The whole code is below which I got here: GitHub - olikraus/u8glib: Arduino Monochrom Graphics Library for LCDs and OLEDs I have removed all of the comments that do not relate to the LCD screen to wade through the mess.
Based on the above images attached and the code below, can you see any reason why this is not working? Any assistance would be very much appreciated.
Thanks, Dave
/*
HelloWorld.pde
"Hello World!" example code.
>>> Before compiling: Please remove comment from the constructor of the
>>> connected graphics display (see below).
Universal 8bit Graphics Library, https://github.com/olikraus/u8glib/
Copyright (c) 2012, olikraus@gmail.com
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "U8glib.h"
// setup u8g object, please remove comment from one of the following constructor calls
// IMPORTANT NOTE: The following list is incomplete. The complete list of supported
// devices with all constructor calls is here: https://github.com/olikraus/u8glib/wiki/device
//U8GLIB_ST7920_128X64_1X u8g(8, 9, 10, 11, 4, 5, 6, 7, 18, 17, 16); // 8Bit Com: D0..D7: 8,9,10,11,4,5,6,7 en=18, di=17,rw=16
//U8GLIB_ST7920_128X64_4X u8g(8, 9, 10, 11, 4, 5, 6, 7, 18, 17, 16); // 8Bit Com: D0..D7: 8,9,10,11,4,5,6,7 en=18, di=17,rw=16
**U8GLIB_ST7920_128X64_1X u8g(10, 11, 13);** // SPI Com: SCK = en = 18, MOSI = rw = 16, CS = di = 17
//U8GLIB_ST7920_128X64_4X u8g(18, 16, 17); // SPI Com: SCK = en = 18, MOSI = rw = 16, CS = di = 17
void draw(void) {
// graphic commands to redraw the complete screen should be placed here
u8g.setFont(u8g_font_unifont);
//u8g.setFont(u8g_font_osb21);
u8g.drawStr( 0, 22, "Hello World!");
}
void setup(void) {
// flip screen, if required
// u8g.setRot180();
// set SPI backup if required
//u8g.setHardwareBackup(u8g_backup_avr_spi);
// assign default color value
if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
u8g.setColorIndex(255); // white
}
else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
u8g.setColorIndex(3); // max intensity
}
else if ( u8g.getMode() == U8G_MODE_BW ) {
u8g.setColorIndex(1); // pixel on
}
else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
u8g.setHiColorByRGB(255,255,255);
}
pinMode(8, OUTPUT);
}
void loop(void) {
// picture loop
u8g.firstPage();
do {
draw();
} while( u8g.nextPage() );
// rebuild the picture after some delay
//delay(50);
}
