Commit Graph

6 Commits (68c48d9bd4ffb86fd1c8554aa2e9d6ceef3ca5eb)

Author SHA1 Message Date
Istvan Csomortani 115c8f2ba6 license: Update old license headers 2017-07-28 12:47:14 +01:00
Rejeesh Kutty 6a437472f2 jesd204-sub-ip- no top files 2017-06-01 15:48:48 -04:00
Istvan Csomortani 50cdb6db67 Merge branch 'jesd204' into dev 2017-05-31 20:44:32 +03:00
Lars-Peter Clausen aba62d96c9 util_cdc: Add multi-bit data synchronization module
The sync_data module can be used to continuously transfer multi-bit signals
like status signals safely from the source to the destination clock
domain. A transfer takes 2 source and 2 destination clock cycles. It is not
guaranteed that all transitions on the source side will be visible on the
target side if the signal is changing faster than this. Logic using this
block should be aware of it. The primary intention is for it to be used for
slowly changing status signals.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-05-23 11:16:07 +02:00
Lars-Peter Clausen ab381825da util_cdc: Add event synchronizer
The event synchronizer can be used to safely transfer 1-bit 1-clock cycle
event signals from one clock domain to another.

For each event recorded in the source domain it is guaranteed that a event
will be generated in the target domain at a later point in time. It is
possible though that multiple events in the source domain will be coalesced
into a single event in the target domain if events are generated faster
than they can be transferred.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-05-23 11:16:07 +02:00
Lars-Peter Clausen 01aea161fa Create CDC helper library
Move the CDC helper modules to a dedicated helper modules. This makes it
possible to reference them without having to use file paths that go outside
of the referencing project's directory.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2017-05-23 11:16:07 +02:00