hello @system.great job. but i have a confusion in the part of seeing the image " For receiving images you will need to install the software from one of the tutorials from the first post"...please help me with this stuff..
thank you
The image is transmitted over serial so you have to use a program in a PC to see it.
Hi @system,
I just brought OV7670 without FIFO and Arduino Mega and as per your documentation i tried it but unfortunately i am not getting exact images 
. Check at GDrive.
I have done same connection for Mega and also using your sketch but its not working. I am doing this for my college project.
Will you please help me???
Hi @system,
Thank you for the code you uploaded. I am just trying to get it to work, but I had the following questions:
1- The arduino outputs the 8MHz clock with a peak to peak voltage of 5V, I believe this isn't good for the sensor,are the two 4.7k resistors you included in between the arduino and the external clock supposed to reduce this to 3.3V?
2- When I run your code, even though I've put a 1MHz baud rate on my terminal, I am receiving weird values such as backwards questions marks. Have you had this problem before? If so, do you have any suggested solutions?
Thanks,
Kasra
i am trying to get the image data pixel by pixel from ov7670 to serial monitor and to store it into arduino memory which i can access later. i am using arduino mega and the camera is configured to 160x120 resolution. Any suggestions or code from which i can get help from?
hye i also buy the same camera module as yours.im using your code and circuit connection but in cmd it stated that the image is not found.please help me.
// Pins configurations:
// SDA/SIOD ---> pin A4 (for Arduino UNO) | pin 20/SDA (for Arduino MEGA)
// SCL/SIOC ---> pin A5 (for Arduino UNO) | pin 21/SCL (for Arduino MEGA)
// MCLK/XCLK --> pin 11 (for Arduino UNO) | pin 10 (for Arduino MEGA)
// PCLK -------> pin 2
// VS/VSYNC ---> pin 3
// HS/HREF ----> pin 8
// D0 ---------> pin A0
// D1 ---------> pin A1
// D2 ---------> pin A2
// D3 ---------> pin A3
// D4 ---------> pin 4
// D5 ---------> pin 5
// D6 ---------> pin 6
// D7 ---------> pin 7
#include <Wire.h>
#define CAMERA_ADDRESS 0x21
// Definitions of functions for manipulating the Arduino boards pins according to each Arduino board registers, so the code will work for both Arduino UNO and Arduino MEGA:
// The only change is the connections of the SDA/SIOD, SCL/SIOC and MCLK/XCLK pins to each board (see the pins configurations above).
#if defined(AVR_ATmega1280) || defined(AVR_ATmega2560) // If you are using Arduino MEGA the IDE will automatically define the "AVR_ATmega1280" or "AVR_ATmega2560" constants.
#define TIMER2_PWM_A_PIN_MODE_OUTPUT() ({ DDRB |= 0b00010000; })
#define PIN2_DIGITAL_READ() ({ (PINE & 0b00010000) == 0 ? LOW : HIGH; })
#define PIN3_DIGITAL_READ() ({ (PINE & 0b00100000) == 0 ? LOW : HIGH; })
#define PIN4_DIGITAL_READ() ({ (PING & 0b00100000) == 0 ? LOW : HIGH; })
#define PIN5_DIGITAL_READ() ({ (PINE & 0b00001000) == 0 ? LOW : HIGH; })
#define PIN6_DIGITAL_READ() ({ (PINH & 0b00001000) == 0 ? LOW : HIGH; })
#define PIN7_DIGITAL_READ() ({ (PINH & 0b00010000) == 0 ? LOW : HIGH; })
#define PIN8_DIGITAL_READ() ({ (PINH & 0b00100000) == 0 ? LOW : HIGH; })
#define PINA0_DIGITAL_READ() ({ (PINF & 0b00000001) == 0 ? LOW : HIGH; })
#define PINA1_DIGITAL_READ() ({ (PINF & 0b00000010) == 0 ? LOW : HIGH; })
#define PINA2_DIGITAL_READ() ({ (PINF & 0b00000100) == 0 ? LOW : HIGH; })
#define PINA3_DIGITAL_READ() ({ (PINF & 0b00001000) == 0 ? LOW : HIGH; })
#elif defined(AVR_ATmega328P) // If you are using Arduino UNO the IDE will automatically define the "AVR_ATmega328P" constant.
#define TIMER2_PWM_A_PIN_MODE_OUTPUT() ({ DDRB |= 0b00001000; })
#define PIN2_DIGITAL_READ() ({ (PIND & 0b00000100) == 0 ? LOW : HIGH; })
#define PIN3_DIGITAL_READ() ({ (PIND & 0b00001000) == 0 ? LOW : HIGH; })
#define PIN4_DIGITAL_READ() ({ (PIND & 0b00010000) == 0 ? LOW : HIGH; })
#define PIN5_DIGITAL_READ() ({ (PIND & 0b00100000) == 0 ? LOW : HIGH; })
#define PIN6_DIGITAL_READ() ({ (PIND & 0b01000000) == 0 ? LOW : HIGH; })
#define PIN7_DIGITAL_READ() ({ (PIND & 0b10000000) == 0 ? LOW : HIGH; })
#define PIN8_DIGITAL_READ() ({ (PINB & 0b00000001) == 0 ? LOW : HIGH; })
#define PINA0_DIGITAL_READ() ({ (PINC & 0b00000001) == 0 ? LOW : HIGH; })
#define PINA1_DIGITAL_READ() ({ (PINC & 0b00000010) == 0 ? LOW : HIGH; })
#define PINA2_DIGITAL_READ() ({ (PINC & 0b00000100) == 0 ? LOW : HIGH; })
#define PINA3_DIGITAL_READ() ({ (PINC & 0b00001000) == 0 ? LOW : HIGH; })
#endif
void initializePWMTimer() {
cli();
TIMER2_PWM_A_PIN_MODE_OUTPUT(); // Set the A PWM pin of TIMER2 to output
ASSR &= ~(_BV(EXCLK) | _BV(AS2));
TCCR2A = (1 << COM2A0) | (1 << WGM21) | (1 << WGM20);
TCCR2B = (1 << WGM22) | (1 << CS20);
OCR2A = 0;
sei();
}
byte readCameraRegister(byte registerId) {
Wire.beginTransmission(CAMERA_ADDRESS);
Wire.write(registerId);
Wire.endTransmission();
Wire.requestFrom(CAMERA_ADDRESS, 1);
while (Wire.available() <= 0);
byte registerValue = Wire.read();
delay(1);
return registerValue;
}
void writeCameraRegister(byte registerId, byte registerValue) {
Wire.beginTransmission(CAMERA_ADDRESS);
Wire.write(registerId);
Wire.write(registerValue);
Wire.endTransmission();
delay(1);
}
void captureFrame(unsigned int frameWidth, unsigned int frameHeight) {
Serial.print("RDY"); // send to the frame capture software a "start of frame" message for beginning capturing
delay(1000);
cli(); // disable all interrupts during frame capture (because it needs to be as fast as possible)
while (PIN3_DIGITAL_READ() == LOW); // wait until VS/VSYNC pin is high
while (PIN3_DIGITAL_READ() == HIGH); // wait until VS/VSYNC pin is low
unsigned int tempWidth = 0;
while (frameHeight--) {
tempWidth = frameWidth;
while (tempWidth--) {
while (PIN2_DIGITAL_READ() == LOW); // wait until PCLK pin is high
while (PIN2_DIGITAL_READ() == HIGH); // wait until PCLK pin is low
byte byteToWrite = 0b00000000;
byteToWrite |= ((PIN7_DIGITAL_READ() == HIGH) << 7);
byteToWrite |= ((PIN6_DIGITAL_READ() == HIGH) << 6);
byteToWrite |= ((PIN5_DIGITAL_READ() == HIGH) << 5);
byteToWrite |= ((PIN4_DIGITAL_READ() == HIGH) << 4);
byteToWrite |= ((PINA3_DIGITAL_READ() == HIGH) << 3);
byteToWrite |= ((PINA2_DIGITAL_READ() == HIGH) << 2);
byteToWrite |= ((PINA1_DIGITAL_READ() == HIGH) << 1);
byteToWrite |= ((PINA0_DIGITAL_READ() == HIGH));
UDR0 = byteToWrite; // send data via serial connection with UART register (we need to use the serial register directly for fast transfer)
while (PIN2_DIGITAL_READ() == LOW); // wait until PCLK pin is high
while (PIN2_DIGITAL_READ() == HIGH); // wait until PCLK pin is low
// ignore each second byte (for a grayscale image we only need each first byte, which represents luminescence)
}
}
sei(); // enable all interrupts
delay(1000);
}
void setup() {
initializePWMTimer();
Wire.begin();
Serial.begin(1000000); // the frame capture software communicates with the Arduino at a baud rate of 1MHz
}
void loop() {
captureFrame(320, 240); // capture a frame at QVGA resolution (320 x 240)
}
bikram05:
i have a confusion in the part of seeing the image " For receiving images you will need to install the software from one of the tutorials from the first post"...please help me with this stuff..
thank you
you will need to install java jdk and follow the steps
hello.. i am also using ov7670 camera and the codes are working i mean it is successfully uploaded. As far as i have i have read about the working of the camera and arduino, i get to konw that due less memory of arduino uno only one single row pixels are stored at a time in the flash memory of arduino uno and as we know that the camera outputs two bytes data for each pixel. so is it possible to read those bytes for a complete row in serial monitor? if possible, how can we do that? Also after uploading is over, if i open the serial monitor i get the following thing RDY???(a lots of question mrak) why is it so? and does it mean? can anybody please tell me soon??
Omany:
i try this but get this can u tell me how to fixed
i am also have same this problem
1 Like
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@junlong898989 - I assume that you reported this topic because you wanted it opened for comment
Open Sesame !
It's done
I run the code that you posted and it causes my serial port reader to output "Error. Operation Timed Out" What do I do to fix this problem?
I also have this error..please help me
Hi, did you use( https://www.instructables.com/OV7670-Arduino-Camera-Sensor-Module-Framecapture-T/ ) this website in the bracket to capture images using the OV7670 camera module? And how do you stream videos? Did you use java?
@system when I run your code, and set my serial monitor to the 1,000,000 baudrate, I see "*RDY*" followed by a lot of corrupted characters. Is there any reason I couldn't use:
Serial.print(byteToWrite);instead of:
UDR0 = byteToWrite;because when I use Serial.print() to print the data it shows up in the serial monitor as numbers instead of boxes, question marks, and the like.
Here is an example of what I am seeing when using your code as-is:
"⸮*RDY*SJ*b@⸮Άv⸮"... (except the garbage data continues on for another several thousand characters).
Worth noting, there's a "⸮" just before the "*RDY*" command and I'm not sure why.
But when I use Serial.print(), I'm pretty sure my board isn't able to keep up, hence why I am getting corrupted image data.
Any help from anybody would be appreciated. I am using an Arduino Mega 2560, and using an OV7670 camera just like OP is.
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