no i seem to be at a loss with it too, im not advanced enough to understand how to control them looking at the timing chart on the datasheet

I will have to keep digging

Thanks for that Garcia, i understand what it does but at the moment i am a little bit behind on the coding, the library i found on Github works great and usues simple functions to call, similar to what you have mentioned about the array, but works in the way led.set("led number" "red value" "green value" "blue value")

Rich

Hi All, i am contructing a CAN based keypad for a motorsport vehicle,

Currently i am merging some code to read a keypad and switch on a corresponding LED above it

I am having trouble with the Boolean "i" ststement as it requires 2 pushes of a keypad to extinguish or illuminate an led, if the same operation has been perfomed on a diffrerent key

I understand why it is doing it, as it needs to switch from i = 1 to i = 0 before it can switch an LED on again, i just cant seem to get my head round doing it, also i would like to simplify it a little but not sure how.

Hope you are able to help

Many thanks

Rich

Code:

#include <Keypad.h> // Include Keypad library
#include <Ucs1903.h> // Include LED Controller Library



#define NUM_LEDS 4  // Defines Number of LED's
#define PIN 13      // Defines Data Pin for LED's

Ucs1903 ledStrip(PIN, NUM_LEDS);


boolean i = 0; //Defines Switch State

int j = 0;   // Variable to Define which LED to Switch


const byte ROWS = 5; //defines number of rows
const byte COLS = 3; //defines number of columns

char keys[ROWS][COLS] = {  //define the symbols on the buttons of the keypads as an array
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'0','A','B'},
  {'C','D','E'},
};

byte rowPins[ROWS] = {9, 8, 7, 6, 5}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {12, 11, 10,}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );




void setup(){


keypad.addEventListener(keypadEvent); //Listen for a keypad Press
}
  
void loop(){
  char key = keypad.getKey();
  
  if (key) {
}
  
     if (i==1){
  ledStrip.setLed(j, 0, 0, 75);  // Turn on LED if Putton has been Pressed
  }
  
   else
    ledStrip.setLed(j, 0, 0, 0);   // Else Turn LED Off
 
    
    ledStrip.show();   // Send Data to LED Controller
    
}


void keypadEvent(KeypadEvent key){         //What to do when a particular Key is pressed
  switch (keypad.getState()){
    case PRESSED:
      switch (key){
        case '1':  i = !i, j= 0; break;
        case '2':  i = !i, j= 1; break;
        case '3':  i = !i, j= 2; break;
        case '4':  i = !i, j= 3; break;
        case '5':  break;
        case '6':  break;
        case '7':  break;
        case '8':  break;
        case '9':  break;
      }
    break;
  }
    
}

Thanks Alll, i have now found a Library to do this

Rich

http://code.google.com/p/fastspi/

This is the site i got the code from, it works fine with the 1903 strip, i just cant get my head around the commands used in the examples there

If i simply wanted to set led 1 to Red for example, what is the simpilest way to do it, once i understand the basic principals of using the keywords i will be fine i think

I hope this all helps in some answers

Cheers

Rich

The testLeds_2 folder actually contains support for the UCS1903 so i have it working on the bench and changing colour, but i dont understand the example code as i posted above,

The TLC5490 was simple, LED.Set and LED.update were simple commands, but i dont understand the commands used to set the data, the layout of the data its expecting to see, and the command to update the data in the chip?

Im not an experienced programmer and ive been racking my brains for hours trying different keywords in the list to get it to do a simple "set Led 1 red" for example

Cheers

Rich

Hi All, i have some 1903 RGB strip , 9 LED's long, and i would like to address each LED colour individually, i,e, set LED 1 to orange, 3 to red, 4 to greet etc

I have some experience with the TLC5490 but these are a different kettle of fish, i have a Fast Spi library i discovered on the net, but the keywords dont seem to reference to this particular chip

I have this so far

Code:

#include "FastSPI_LED2.h"




#define NUM_LEDS 4

struct CRGB { byte r; byte b; byte g; };

struct CRGB leds[NUM_LEDS];


UCS1903Controller400Mhz<3> LED; // Sets the Controller to be UCS1903



void setup()
{

LED.init();  //Initialise LED Controller
}


void loop() {

for(int i = 0; i < 3; i++) {
for(int iLed = 0; iLed < NUM_LEDS; iLed++) {
memset(leds, 0,  NUM_LEDS * sizeof(struct CRGB));
switch(i) {
case 0: leds[iLed].r = 255; break;
case 1: leds[iLed].g = 255; break;
case 2: leds[iLed].b = 255; break;
}

LED.showRGB((byte*)leds, NUM_LEDS);;

delay(100);
}
}

}

This is an expample provided which just runs the led's through each of the 3 colours continuousle, but i simple want to write a value and send it, sorry i cant offer more insight

Keywords supplied,


start   KEYWORD2
stop   KEYWORD2
init   KEYWORD2
setLeds KEYWORD2
setChipset KEYWORD2
setCPUPercentage KEYWORD2
setRGBData KEYWORD2
getRGBData KEYWORD2
setDirty KEYWORD2
show KEYWORD2
getCounter KEYWORD2
clearCounter KEYWORD2
getCycleTime KEYWORD2
getCycleTarget KEYWORD2

Thanks all

Rich

Hi all, i have recently aquired 4 off 16x32 dual colour LED Matricies from a clearance,

The datasheet shows the control chip to be from Vissem but little else,

There is a timing sheet that shows the control to be Via Serial Data, and Address A0 to A3, maybe a BCD?

Has anyone ever used one? o know of some libraries i could adapt?  there seems to be very little info on the web

many thanks to all

Rich

Well, it seems that it works on BIT_BANG, but it doesnt upate the LED's, fast enough

How can i run Both the MCP and TLC chips from the SPI bus, the CS and B;ank pins are now separate,

Do i need to add some clock timing between the devices?

Cheers
Rich

Yea, the Matricies are CSM-88121Y, i have a data sheet for them and i have a rough idea of how the shift registers will work the display, but not the BCD chip, is that just to count up and refresh each column ?

Its a bit over my head at the moment..

Thanks

Rich

OK, so i think i have decoded the schematic and it looks as if the Cathodes (Columns) are being driven via serial, ( UCN5822A ) per 8x8 Matrix, with the Anodes (Rows) being driven via a 8 channel driver, by a BCD (HEF4028BT)
I will post my (very rough) schematic below,

Where the Wavy lines break up the signal lines it is to denote that each line has an Inductor, resistor and Mosfet in as a switching circuit,

So i guess my question is, are there any libraries or anything that might help me get this up and running? i have searched the forums with little success.

Thanks

Rich

HI all i came across this in my attic, i had forgotten about it,

Just wondering if anyone had seen anyone do something with it on the Arduino so far?

10 times 8x8 matrix displays
2 off 74ABT541 Octal Buffer
1 off HEF4028BT  1 - 10 Decoder
1 off UDN2982LW  8 channel source driver
10 off UCN5822A 8 Bit Serial Input latch drivers

I am currently trying to reverse engineer the schematic to make sense of it and see how diffuclt or simple it would be to run with an Arduino




Thanks All

To create a Matrix screen of 900 LED's, to display simple graphics, Arrows, Bullseye, etc ,

Hi All, i am looking at using a matrix of 30 x 30 RGB led's using WS2801's

My question is weather each DMX channel is assigned to an individual colour of each LED, or if it is each WS2801 that is addressed?

as the SPI to DMX interface i am looking at using has a max number of channels of 1024, so a 900 LED array would need either 900 channels if each WS2801 is addressed, or 2700 channels if each colour of each RGB is addressed,

Many thanks for the information

Rich

PERFECT!!

Thanks so much for the help, just what i needed

Rich