Interface a CMOS image sensor to a DSP Module

[fasmatikos]

ti with image sensor interface

Hi guys,

Can you please help me with this project?
I 'm currenrly trying to interface the omnivision 7620 colour image sensor with the TI DSP TMS320C6711. I think that I have to built the I2C intrface to an FPGA or somethink like that ... Does any of you have any ideas about what should I do?

waiting for any reply
thank you
fasmatikos

 

[jarodz]

sccb i2c

Does the TI DSP has GPIO output?
If it does, you can write a sub-function to generate the I2C waveform to configure the sensor. Or not, I think you must implement it by FPGA.

Regards,
Jarod

 

[ezpcb]

interfacing of cmos image sensor with ti dsp

Hi fasmatikos
There're 16 GPIO pins on C6711, did you used all of them for other applications? Only 2 need for I2C..

mike

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www.ezpcb.com

 

[fasmatikos]

interface directly to cmos image sensor with fpga

Sorry guys , but because i'm new in this, do i have to pull wires from the sensor to the fpga and then interface the fpga (ALTERA FLEX10K) with the c6711 or i can do it directly without the help of the fpga? this is my graduation project but it seems very blury to me...

 

[jarodz]

interfacing cmos image sensor to fpga

For I2C, you can direct connect sensor to dsp by pull-high circuit(using a pull high resitance, see the datasheet or I2C specfication.

The clock rate of sensor output data may be from 1M~12M according the oscillator and the configure setting. You must check the speed of GPIO to decide the output rate.

Regards,
Jarod

 

[ezpcb]

cmos dps module

Start with C6711! You must be a brave newbie

No fpga is needed. just connect 2 GPIO of 6711 to SCL and SDA, then program the GPIO by the sequence of I2C. Don't forget to pull up the SCL and SDA with 4.7k resistor

mike

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www.ezpcb.com

 

[fasmatikos]

image sensor interface fpga

Ok we will use the GPIO with the I2C to configure the sensor.
a) How I interface the sensor to the DSP in order to acquire the image ?
b) How the acquired image can be saved into the DSP RAM ?
c) I have to write a C program for the I2C interface right?
Doyou know where to find this source code?

Is these too much to ask?
thank a lot

 

[jarodz]

cmos image sensor +interface

The DSP have 16 GPIOs.
Two for I2C
Two for HSYNC/VSYNC
Ten for data.
So it is enough.

To received the data, you must check the syncs.
There are two type.
One is CCIR656, the sync information is embedded in data.(See the datasheet)
The other is two seperate line called HSYNC and VSYNC.

Regards,
Jarod

 

[fasmatikos]

cmos image sensor interface

I looked into the TI datasheets but i could find information about the GPIO pins.
The only thing that i found is that i can use the McBSP pins as GPIO...


is that what you say?

 

[jarodz]

dsp sensors interfacing

I have no ideas about the TI DSP. I just follow ezpcb's word.
My experiment is to control the sensor that I can share to you.

Regards,
Jarod

 

[fasmatikos]

omnivision interface sccb i2c

Let me ask you something else...
Wthat are the defferences between SCCB and I2C interface?
The omnivision camera datasheet says that the interface is SCCB while in the site it is mentioned that I2C is used!!!! (The camera is OV7620)

 

[jarodz]

sccb to i2c interface

The time diagram of SCCB look like that of I2C. I think they are the same.
If you want the soure code to generate I2C waveform, you can search other forum in this site. I have see someone post, but I don't remeber where it is.


Regards,
Jarod

 

[artem]

interfacing cmos image sensors

look at this one - it should help you :
**broken link removed**

 

[fasmatikos]

sccb interface omnivision programming

Should I Use the DMA Controllerfor the interfacing?
I think so,because in qvga mode the rate is 60 fps ! It is vary fast for iterrupts isn't it?