1MHz+ Driver for Linear CCD using GPIO

[ahmedj]

Hi

I was wondering if the Pi is capable enough to drive the following CCD at 1MHz+ using the GPIO.

http://www.adelco.it/online/company/Son ... LX554B.pdf

The idea is to run at a frame rate of 500 to 1000fps to a fast ADC and read back to the Pi via the SPI. Is this doable?

Thx

[jdb]

The chip outputs an analogue signal clocked by a digital signal. It's also a 5V power supply with 5V digital IO

The Pi is perfectly capable of driving a clock, and with level shifting can drive the clock input. The problem is the A/D required for converting vout into a sensible bit code. It would also have to be clocked and sample at the right time because the output waveform has a start-of-pixel edge as well as the sample.

[FLYFISH TECHNOLOGIES]

Hi,

The idea is to run at a frame rate of 500 to 1000fps to a fast ADC and read back to the Pi via the SPI. Is this doable?

I've skimmed the datasheet... it seems to me that the data output has just few levels and is not "very analog". Consequently, I see comparator as more suitable element (faster, no SPI, easier code) than the ADC is.


Best wishes, Ivan Zilic.

[ahmedj]

The chip outputs an analogue signal clocked by a digital signal. It's also a 5V power supply with 5V digital IO

The Pi is perfectly capable of driving a clock, and with level shifting can drive the clock input. The problem is the A/D required for converting vout into a sensible bit code. It would also have to be clocked and sample at the right time because the output waveform has a start-of-pixel edge as well as the sample.

Ah. Didn't notice the leading edge on the output. Looking at other sensors, that doesn't seem to be there.

Regarding interfacing the converted data back to the Pi, would SPI be the best option in terms of speed?