Atmel C one cycle

the diagram is garbled, try again with a fixed-pitch font (eg courier).

Hi, I couldnt figure out the font thing after testing, so i've placed the image on a webpage -

I want to use the atmel for the clock, and its not really fussy regarding time as the device only requires that the data be transfered in this means with a clock cycle of greater than 25ns.

thanks

David

I see this _ _ _ _ | |_| |_| |_| |_ clk ___ ___ | |___| |___ data

you will too if you paste it into notepad etc...

and 'im guessing both are outputs, and possibly that data could have other patterns.

try this:

int a=databyte; /* databyte is 0x55 in the example waveform */ int n=8; int keep=(inportb(PORTNUMBER)&1)|2; do { int bits=(a&1)|keep; outportb(PORTNUMBER,bits); a=a>>1; bits&=~2; outportb(PORTNUMBER,bits); } while(--n); that'll send the data out bit 0 and the clock out bit 1 of port whose output is addresed by PORTNUMBER.LSB first, as fast as it can, which means if your clock is less than about 100Mhz it should work for you...

you'll probably need to modify parts of this to get it to work with the c compiler you have...