Dot Matrix Display

Projects Programming
1

Working with a dot matrix display and a couple of 74HC595 shift registers. the circuit is pretty complex and uses every jumper wire I have. Following the setup video tutorial exactly, my last resort is that there must be something wrong with the code

const int latchPin = 8;//Pin connected to ST_CP of 74HC595
const int clockPin = 12;//Pin connected to SH_CP of 74HC595
const int dataPin = 11; //Pin connected to DS of 74HC595
int tim = 100;
int datcol[8] = {127,191,223,239,247,251,253,254};
int data[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/" ",0/
0xFF,0xC1,0xBE,0xBE,0xBE,0xC1,0xFF,0xFF,
0xFF,0xDF,0xDF,0x80,0xFF,0xFF,0xFF,0xFF,/"1",2/
0xFF,0xDC,0xBC,0xBA,0xB6,0xCE,0xFF,0xFF,/"2",3/
0xFF,0xDD,0xBE,0xB6,0xB6,0xC9,0xFF,0xFF,/"3",4/
0xFB,0xF3,0xEB,0xDB,0x80,0xFB,0xFF,0xFF,/"4",5/
0xFF,0x8D,0xAE,0xAE,0xAE,0xB1,0xFF,0xFF,/"5",6/
0xFF,0xC1,0x96,0xB6,0xB6,0xD9,0xFF,0xFF,/"6",7/
0xFF,0xBF,0xBC,0xB3,0xAF,0x9F,0xFF,0xFF,/"7",8/
0xFF,0xC9,0xB6,0xB6,0xB6,0xC9,0xFF,0xFF,/"8",9/
0xFF,0xCD,0xB6,0xB6,0xB4,0xC1,0xFF,0xFF,/"9",10/
0xFC,0xF3,0xCB,0x9B,0xEB,0xF3,0xFC,0xFF,/"A",11/
0xFF,0x80,0xB6,0xB6,0xB6,0xB6,0xC9,0xFF,/"B",12/
0xFF,0xE3,0xDD,0xBE,0xBE,0xBE,0xBE,0xDD,/"C",13/
0xFF,0x80,0xBE,0xBE,0xBE,0xBE,0xDD,0xE3,/"D",14/
0xFF,0x80,0xB6,0xB6,0xB6,0xB6,0xBE,0xFF,/"E",15/
0xFF,0x80,0xB7,0xB7,0xB7,0xB7,0xBF,0xFF,/"F",16/
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/" ",0/};/"0",1/
void setup ()
{
//set pins to output
pinMode(latchPin,OUTPUT);
pinMode(clockPin,OUTPUT);
pinMode(dataPin,OUTPUT);
}
void loop()
{

for(int n = 0; n < 136; n++)
{
for(int t = 0;t < 10;t ++)//Show repeated 10 times
{
int dat = 0x01;
for(int num = n; num < 8+n; num++)
{
dat = dat<<1;
delay(1); //wait for a microsecond
shiftOut(dataPin,clockPin,MSBFIRST,data[num+0]);
shiftOut(dataPin,clockPin,MSBFIRST,dat);
//return the latch pin high to signal chip that it
//no longer needs to listen for information
digitalWrite(latchPin,HIGH); //pull the latchPin to save the data
//delay(1); //wait for a microsecond
digitalWrite(latchPin,LOW); //ground latchPin and hold low for as long as you are transmitting
}
}
}
}

Any assistance would be greatly appreciated

2

just to update, there is no clear way to know which is the top row and which is the bottom, but when connected one way, i get all LEDs lit and the other just some gibberish moving across the screen.

3 
int data[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/*" ",0*/
              0xFF,0xC1,0xBE,0xBE,0xBE,0xC1,0xFF,0xFF,
              0xFF,0xDF,0xDF,0x80,0xFF,0xFF,0xFF,0xFF,/*"1",2*/
              0xFF,0xDC,0xBC,0xBA,0xB6,0xCE,0xFF,0xFF,/*"2",3*/
              0xFF,0xDD,0xBE,0xB6,0xB6,0xC9,0xFF,0xFF,/*"3",4*/
              0xFB,0xF3,0xEB,0xDB,0x80,0xFB,0xFF,0xFF,/*"4",5*/
              0xFF,0x8D,0xAE,0xAE,0xAE,0xB1,0xFF,0xFF,/*"5",6*/
              0xFF,0xC1,0x96,0xB6,0xB6,0xD9,0xFF,0xFF,/*"6",7*/
              0xFF,0xBF,0xBC,0xB3,0xAF,0x9F,0xFF,0xFF,/*"7",8*/
              0xFF,0xC9,0xB6,0xB6,0xB6,0xC9,0xFF,0xFF,/*"8",9*/
              0xFF,0xCD,0xB6,0xB6,0xB4,0xC1,0xFF,0xFF,/*"9",10*/
              0xFC,0xF3,0xCB,0x9B,0xEB,0xF3,0xFC,0xFF,/*"A",11*/
              0xFF,0x80,0xB6,0xB6,0xB6,0xB6,0xC9,0xFF,/*"B",12*/
              0xFF,0xE3,0xDD,0xBE,0xBE,0xBE,0xBE,0xDD,/*"C",13*/
              0xFF,0x80,0xBE,0xBE,0xBE,0xBE,0xDD,0xE3,/*"D",14*/
              0xFF,0x80,0xB6,0xB6,0xB6,0xB6,0xBE,0xFF,/*"E",15*/
              0xFF,0x80,0xB7,0xB7,0xB7,0xB7,0xBF,0xFF,/*"F",16*/
              0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/*" ",0*/};/*"0",1*/

How many of those values require an int type?

int datcol[8] = {127,191,223,239,247,251,253,254};

We can only guess how you came up with these values (that don't need to be int, either). Personally, I'm not into guessing.

The code does something. You want it to do something. Again, I'm not into guessing.

4

Looks like you have an error in your second line for the int data call...this should fix it...

const int latchPin = 8;//Pin connected to ST_CP of 74HC595
const int clockPin = 12;//Pin connected to SH_CP of 74HC595
const int dataPin = 11; //Pin connected to DS of 74HC595
int data[] = {
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/" ",0/
0xFF,0xC1,0xBE,0xBE,0xBE,0xC1,0xFF,0xFF,/"0",1/
0xFF,0xDF,0xDF,0x80,0xFF,0xFF,0xFF,0xFF,/"1",2/
0xFF,0xDC,0xBC,0xBA,0xB6,0xCE,0xFF,0xFF,/"2",3/
0xFF,0xDD,0xBE,0xB6,0xB6,0xC9,0xFF,0xFF,/"3",4/
0xFB,0xF3,0xEB,0xDB,0x80,0xFB,0xFF,0xFF,/"4",5/
0xFF,0x8D,0xAE,0xAE,0xAE,0xB1,0xFF,0xFF,/"5",6/
0xFF,0xC1,0x96,0xB6,0xB6,0xD9,0xFF,0xFF,/"6",7/
0xFF,0xBF,0xBC,0xB3,0xAF,0x9F,0xFF,0xFF,/"7",8/
0xFF,0xC9,0xB6,0xB6,0xB6,0xC9,0xFF,0xFF,/"8",9/
0xFF,0xCD,0xB6,0xB6,0xB4,0xC1,0xFF,0xFF,/"9",10/
0xFC,0xF3,0xCB,0x9B,0xEB,0xF3,0xFC,0xFF,/"A",11/
0xFF,0x80,0xB6,0xB6,0xB6,0xB6,0xC9,0xFF,/"B",12/
0xFF,0xE3,0xDD,0xBE,0xBE,0xBE,0xBE,0xDD,/"C",13/
0xFF,0x80,0xBE,0xBE,0xBE,0xBE,0xDD,0xE3,/"D",14/
0xFF,0x80,0xB6,0xB6,0xB6,0xB6,0xBE,0xFF,/"E",15/
0xFF,0x80,0xB7,0xB7,0xB7,0xB7,0xBF,0xFF,/"F",16/
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/" ",17/
};
void setup ()
{
//set pins to output
pinMode(latchPin,OUTPUT);
pinMode(clockPin,OUTPUT);
pinMode(dataPin,OUTPUT);
}
void loop()
{

for(int n = 0; n < 136; n++)
{
for(int t = 0;t < 10;t ++)//Show repeated 10 times
{
int dat = 0x01;
for(int num = n; num < 8+n; num++)
{

shiftOut(dataPin,clockPin,MSBFIRST,~data[num]);//control ROW of dot matrix
shiftOut(dataPin,clockPin,MSBFIRST,~dat); //control COL of dot matrix
//return the latch pin high to signal chip that it
//no longer needs to listen for information
digitalWrite(latchPin,HIGH); //pull the latchPin to save the data
//delay(1); //wait for a microsecond
digitalWrite(latchPin,LOW); //ground latchPin and hold low for as long as you are transmitting
dat = dat<<1;
delay(1); //wait for a microsecond
}
}
}
}