Commit Graph

10 Commits

Author SHA1 Message Date
Sebastien Bourdeauducq ae8ef18f47 rtlink: sanity-check parameters 2018-11-26 01:14:02 +08:00
Robert Jördens 3a6566f949 rtio: judicious spray with reset_less=True
Hoping to reduce rst routing difficulty and easier RTIO timing closure.
2018-03-07 14:57:18 +00:00
Sebastien Bourdeauducq 65baca8c57 rtio: clean up error-prone rtlink.get_or_zero() 2017-09-17 16:11:36 +08:00
Robert Jördens 6cdb96c5e0 rtio: add support for latency compensation in phy
* if multiple RTIO channels influence the same data stream and physical
output channel (see SAWG) differential latency needs to be compensated
* this is a NOP for phys with zero delay (default)
* if delay==1, it adds one timestamp-wide register
* if delay >1, it adds one adder and one register
* latency compensation using (~10-50 deep) delay lines is about as
expensive as a single adder+register but very tedious to implement
2016-12-14 19:16:07 +01:00
Sebastien Bourdeauducq 542a375305 rtio: remove NOP suppression capability
Back when RTIO was driving TTLs, this functionality made it simpler to use by removing some irrelevant underflows.

The same technique is not applicable to DDS and SPI, so the user will have to deal with such underflows.

This patch makes the behavior of RTIO more consistent and the code simpler.
2016-03-10 09:47:29 +08:00
Sebastien Bourdeauducq 03b53c3af9 rtio: disable replace on rt2wb channels 2016-03-09 23:37:04 +08:00
Sebastien Bourdeauducq e26147b2ac gateware,runtime: use new migen/misoc 2015-11-04 00:35:03 +08:00
Sebastien Bourdeauducq 71167b8adf rtio: do not attempt latency compensation in gateware 2015-04-16 13:09:29 +08:00
Sebastien Bourdeauducq 26003781b4 rtio/rtlink: add 'like' methods to clone interfaces 2015-04-16 13:02:39 +08:00
Sebastien Bourdeauducq ff9a7727d2 rtio: add rtlink definition (currently unused) 2015-04-13 22:19:18 +08:00