| --- Log opened Tue Apr 21 00:00:16 2015 | ||
| olofk | Has anyone made a wishbone CDC component? | 07:02 |
|---|---|---|
| stekern | not me, but I'd want one | 07:03 |
| stekern | ...or _franck__ did a simple one, but it'd be nice to have one that supports bursts | 07:04 |
| olofk | I only need to sync cyc, stb, ack and err atm | 07:05 |
| olofk | Wishbone is crap for bursts over CDC | 07:05 |
| olofk | At least if you want errors to be propagated back | 07:06 |
| olofk | But I guess it's ok to let the CDC component ack even if the master has not acked in most cases | 07:06 |
| stekern | hmm? | 07:08 |
| stekern | but doing wb CDC without burst support is easy | 07:13 |
| stekern | the only caveat is that you have to register the return data on reads | 07:14 |
| stekern | hmm, looks like I'll need to kill this FIXME: https://github.com/skristiansson/wb_sdram_ctrl/blob/master/rtl/verilog/wb_port.v#L379 | 07:27 |
| stekern | this is a bit tricky, since agnus can't take no for an answer | 07:34 |
| olofk | stekern: I made some heavy changes to wb_sdram_ctrl a few months ago to make it a bit faster, smaller and to support DDR2 as well. Should clean up that a bit and see if I have patches to apply. Might have something for that FIXME actually | 07:44 |
| stekern | great | 07:48 |
| olofk | Doh. ssh server isn't turned on | 11:13 |
| _franck__ | olofk: as you are sometimes looking for small uart examples, https://github.com/fjullien/orsboot/commits/master | 15:24 |
| stekern | bah, this isn't going to work, wb_sdram_ctrl's latencies are too indeterministic | 16:12 |
| olofk | stekern: oh.. I just realized that the upsizer is already in wb_intercon-1.0 | 17:52 |
| olofk | olofk/wb_intercon | 17:52 |
| olofk | Looks like I commited the testbench as well. Not sure if any of it works though | 17:55 |
| olofk | _franck_: Thanks. That's a useful reference | 17:55 |
| olofk | I did init and read in asm last week actually | 17:56 |
| olofk | https://github.com/olofk/or1k-hexloader | 17:56 |
| bandvig | stekern: which test do you use to check modifications in pipeline? | 19:07 |
| --- Log closed Wed Apr 22 00:00:17 2015 | ||
Generated by irclog2html.py 2.15.2 by Marius Gedminas - find it at mg.pov.lt!