Homebrew PCBs

The C84 has about 15us reading clock.
Writing is much slower, but that is only done when it is powered off.

I think eddie just pulled the data line low at the right moment.


What do you suggest how i proceed? I'm not sure how to go about making a  
software for this.

Do i have to get the logic analyzer out to decode the pattern? I don't  
think the memory of my scope is deep enough to do that. Or is the pattern  
known already?

ST


On Fri, 30 Jun 2006 23:33:48 +0200, Volkan Sahin <vsahin@...>  
wrote:

> The printer that I am using has a serial clk of 4usec it is fast for a  
> micro and I could not able to write a fast enough interrupt handling  
> routine that can run on 8Mhz MSP430 micro. It can be different for your  
> printer model.
>  I think in Eddie's solution micro works in parallel with cartridge  
> chips, either he is sending complete zero for first 2 byte or  
> reprogramming the chips (but I am not sure). In my solution I am  
> completely emulating chips and not using the power source from the  
> cartridge connection so I don't have any startup or power on reset  
> problem. Sure new printers check everything, after writing it verifies  
> the written data. If it fails, it gives error messages. I have tried to  
> send same ink level; it accepts it after doing recharging (waste of  
> ink). BTW Atmel has also very fast AVR series.
> Volkan