Ok, got a GDS out, running through DRC's taking f...
# openlanet
tnt
11/17/2020, 10:43 AMOk, got a GDS out, running through DRC's taking forever. Also ... no idea if there was errors, couldn't see the whole scroll back.
d
drr
11/17/2020, 10:59 AMare you using the exploration script to try different variables or just manually tweaking the config and re running?
t
tnt
11/17/2020, 11:00 AMI manually tweaked.
tnt
11/17/2020, 11:01 AMWith auto placement or auto-sizing I could never even get past placement. With auto pins I couldn't get past routing. So I ended up with manual size specifications, manual macro placement and manual pin placement.
tnt
11/17/2020, 11:04 AMBut ATM I'm just in openlane, not in the caravel. Haven't even looked at that yet 😩
d
drr
11/17/2020, 11:09 AMby manual pin placement, do you mean this kind of env in config.tcl?
https://github.com/efabless/caravel/blob/release/openlane/user_project_wrapper/config.tcl#L4
t
tnt
11/17/2020, 11:09 AMyes
👍 1
d
drr
11/17/2020, 11:21 AMgetting the caravel sim going wasn't too bad after the library stuff was fixed. I forgot how slow vanilla SPI flash XIP code was though 😬 Not a big deal for my project, not enough to put effort into making the program faster anyway
drr
11/17/2020, 11:40 AMgoing to try the pin_order config too and see if it makes triton happy
t
tnt
11/17/2020, 11:42 AMYeah, this might be a problem for me ... running off flash is going to suck for a usb stack 😕
d
drr
11/18/2020, 1:25 AMallocating 1KB of the included DFFRAM for the hottest of hot functions sounds annoying, but not sure what the alternative is if speed is important
drr
11/18/2020, 1:25 AMunless you can squeeze in another one of those openRAM blocks..
t
tnt
11/18/2020, 7:02 AMI probably can squeeze more SRAM. The complete usb core is only 0.75 mm^2