OV7670 Snapshot Test Code

gistfile1.cpp

// pin definition
int data_p[] = {0,1,2,3,4,5,6,7};
int xclock_p = 8;
int pclock_p = 9;
int href_p = 10;
int vsynch_p = 11;
// not used int siod = 12;
// not used int sioc = 13;

int lastPclock = 0;
int pclock;
int href;
int vsynch;
byte pixel;

void setup() {

  Serial.begin(9600);
  Serial.println("started");
  // configure data pins as input
  for (int i = 0; i < 8; i++) {
    pinMode(data_p[i], INPUT);
  }
  // configure rest input pins
  pinMode(xclock_p, OUTPUT);
  pinMode(pclock_p, INPUT);
  pinMode(href_p, INPUT);
  pinMode(vsynch_p, INPUT);

}

int control = 0;

void loop() {
  
  // just take one snapshot (307200 = 600 * 480) {{{
  if (control >= 307200) {
    return;
  }
  // }}}
  
  digitalWrite(xclock_p, HIGH);
  
  //Serial.println("clock written");

  vsynch = digitalRead(vsynch_p);
  href = digitalRead(href_p);
  pclock = digitalRead(pclock_p);
  
  if (vsynch == HIGH) return;
  if (href == LOW) return;
  if (!(lastPclock == HIGH && pclock == LOW)) {
    lastPclock = pclock;
    return;
  } else {
    lastPclock = pclock;
  }
  
  pixel = readByteFromDataInput();
  
  char s[10];
  sprintf(s, "%d ", pixel);
  
  Serial.println(s);

  if (control % 640 == 0) {
    Serial.println("");
  }
  
  // just take one snapshot {{{
  control++;
  // }}}

  if (control >= 307200) {
    Serial.println("finished");
  }

}

byte readByteFromDataInput() {
  byte result = 0;
  for (int i = 0; i < 8; i++) {
    result = result << 1 | digitalRead(data_p[i]);
  }
  return result;
}

Hello Francisco,

Do you had some advance in the test with this code?

Hi rafaneri, not really.

Hi - any luck/prgress with the camera ? I am working on it as well.

Francisco thought the camera when you buy 4 pins that can be difficult, but 18 pin more difficult all the complexity of the logic ...

in case of positive feedback you can answer me please ...dimates@hotmail.com

There are very few post of this House for 18 pins, yours is great pity not to have finished ..:
I saw another post is very good:

http://embeddedprogrammer.blogspot.com/2012/07/hacking-ov7670-camera-module-sccb-cheat.html#comment-form

place this example:

Thanks

I have only the following parts which are OV7670 and Arduino uno board. I wrote my code and I have to cheange the clock function code to either read or write in the registers of the camera"OV7670". But, I can't get any response from the camera.

My code has written as follows:
"Start"
Serial.println("Memory written");
}

void loop()
{
//
// Read the first page in EEPROM memory, a byte at a time
//
Serial.println("eeprom_read_byte, return: ");

Wire.beginTransmission(DEVADDR);
Wire.write(0x0B);
Wire.endTransmission();
Wire.requestFrom(int(DEVADDR), 1);
if (Wire.available()) {
rdata = Wire.read();
}
//return rdata;
Serial.println(rdata, HEX);

digitalWrite(13, HIGH);
delay(100);
digitalWrite(13, LOW);
delay(100);

}

void eeprom_write_byte(byte deviceaddress, int eeaddress, byte data)
{
// Three lsb of Device address byte are bits 8-10 of eeaddress
byte devaddr = deviceaddress | ((eeaddress >> 8) & 0x07);
byte addr = eeaddress;
Wire.beginTransmission(devaddr);
Wire.write(int(addr));
Wire.write(int(data));
Wire.endTransmission();
delay(10);
}

"End"

Thank you again and I'm looking for your help.

Regards
Saad Alasmari
salasmari@kacst.edu.sa

Hi Francisco,
Thank you very much for taking the time reading my comments.Recently, I'm testing this code for taking a snapshot too.
If possible I would like to know how to see the image taken by this code?

I look forward to receiving your reply.

best regards,
Albert

thank a lot bosssssssssssss

plz send me a video or working wile to my mail radhakrishna3579@gmail.com or send me in watsappp 9553793579

boss..i need to know how it takes snapshot and how it works?

@franciscospaeth
I would like to know how to view the snapshot taken?