Problem with digital pins

Using Arduino General Electronics
1

Hi there

I have WaveShare VGA PS2 board, I connected pins to GND, HSYNC, VSYNC, R, G and B, how ever I got no signal on my monitor, i tried check pins using digitalRead but it always return 0, i tried with different cables but still nothing, first time I tried it yesterday, monitor got signal but black screen on it due to wrong pin connection, today I don't have even signal on it. I don't know what's I did wrong (definitely I did not make accidentally damage or short circuit to board because I will saw if something wents wrong). Some one used this WaveShare board with Arduino and can help or explain to me what I did wrong? Thank i advance for every response

2

Where have you conect this pins?

Ref: https://www.waveshare.com/wiki/VGA_PS2_Board

3

GND to GND, HSYNC to D9 pin, VSYNC to D8, R to D3, G to D5 and B to D6

4

Maybe say which Arduino board you are connecting.
Is 5V or 3V might make a difference.

Without looking I am guessing you chose what it says to use and this should be easy kit. But I am wondering about power?

EDIT: after visiting the WIKI I think I would not buy what has so little information about.

5

What exactly was this check pins procedure?

6 
const int HSYNC_PIN = 9;
const int VSYNC_PIN = 8;
const int R_PIN = 3;
const int G_PIN = 5;
const int B_PIN = 6;

void setup() {
  Serial.begin(9600);
  pinMode(HSYNC_PIN, INPUT);
  pinMode(VSYNC_PIN, INPUT);
  pinMode(R_PIN, INPUT);
  pinMode(G_PIN, INPUT);
  pinMode(B_PIN, INPUT);

void loop() {
  int hstate = digitalRead(HSYNC_PIN);
  int vstate = digitalRead(VSYNC_PIN);
  int rstate = digitalRead(R_PIN);
  int gstate = digitalRead(G_PIN);
  int bstate = digitalRead(B_PIN);

  Serial.print("HSYNC: ");
  Serial.println(hstate);
  Serial.print("VSYNC: ");
  Serial.println(vstate);
  Serial.print("R: ");
  Serial.println(rstate);
  Serial.print("G: ");
  Serial.println(gstate);
  Serial.print("B: ");
  Serial.println(bstate);
}
7

Thanks.
Was this using another Arduino while the first one was running the sketch? Did you connect the grounds to these two processors together?

I can't see any setting of the baud rate in this sketch, was it fast?

8

I used only one Arduino, I set speed to 9600

9

Then you will never see anything from this method because the code that generates the pulses you are trying to see, that is the processor in the wave shield, is not running, so there will be nothing to see.

Not in the code you posted in post#6 you didn't.
In fact that post is missing all the pin definitions as well so it will not even compile. When you post code you must post ALL your code.

Why so slow? You would be seeing rapid change in the pulses if any were being generated so you need to print out the data as quickly as possible.

10

Sorry, I was replying fast, now I edited with full code

11

Problem solved, I wrong connect HSYNC and VSYNC pins in other places than VGA library requires