artiq/artiq/devices
Robert Jördens 6a0e97f161 pdq2: refactor program_frame(), cleanup test, stall correctly
Once the Sequencer ack's a line, the Parser starts preparing the
next one. This includes jumping through the frame table if necessary.
To stall the Parser while the Sequencer executes the last line of a
frame and to ensure that the frame select lines can be set up and their
sampling is synchronized to a trigger, we add a triggered stall line
at the end of the frame.

When that line is triggered the Parser jumps through the table and starts
parsing the first line of the next frame. We let the duration of this
last stall line be 10 cycles (200ns@50MHz) to be able to distinguish this
sampling of the frame select lines from the triggering of the first line
in the next frame.

frame           f
parser     n     f 0
stb        __---________---___
trigger    ___----_______----_
ack        ____-__________-___
sequencer  n-1 n          0
2015-04-14 18:18:16 -06:00
..
lda Controller cleanups 2015-03-23 17:02:39 +01:00
novatech409b novatech409b: cleanup 2015-03-25 16:11:11 +01:00
pdq2 pdq2: refactor program_frame(), cleanup test, stall correctly 2015-04-14 18:18:16 -06:00
thorlabs_tcube thorlabs_tcube: spelling, fix ping 2015-03-23 17:24:12 +01:00
__init__.py Fix module installation 2014-10-11 00:42:26 +08:00