b09333f023
hw: add spi and new vexriscv to foboot
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This is the beginning of having SPI.
Also add a new two-stage pipeline.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-20 11:25:09 +08:00
c7632ae8bd
deps: litex: sync with latest version
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This pulls in several fixes, including custom vexriscv modules.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-17 17:33:31 +01:00
4aa3861c03
hw: deps: update to first feature-complete valentyusb
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This is the first version of `valentyusb` that successfully enumerates
without any errors.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-11 11:52:03 +08:00
5bcd6c44fb
deps: update valentyusb to working rev
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This revision works, although more tuning needs to be done.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-10 22:43:28 +08:00
2d7c7794f5
hw: foboot-bitstream: remove debug pins, use epfifo
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Remove the debug pins to let timing close.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-10 21:06:37 +08:00
0c6e444789
hw: foboot-bitstream: add -relut and friends to nextpnr
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Shrink the resulting gate count by adding -relut and adjusting the
number of luts that a CE signal can use.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-10 21:05:51 +08:00
8aed600cd6
hw: foboot-bitstream: specify additional clock domain constraints
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Specify all the clock domain constraints for every possible signal, to
work around the fact that nextpnr currently will pick one and ignore the
rest.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-10 21:05:12 +08:00
6638801886
hw: foboot-bitstream: remove clk48_in signal
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It's unused.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-10 21:04:19 +08:00
8fb6b5977b
hw: foboot-bitstream: remove unused clk48 net
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We only use the raw and usb48 nets.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-10 20:53:58 +08:00
13360015db
Merge branch 'master' of github.com:xobs/foboot
2019-03-08 20:49:13 +08:00
d603113b6f
foboot-bitstream: send clk48 through shifter, then through pll
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Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-08 20:47:42 +08:00
44ee19c8b4
valentyusb: use latest fix for metastable transmissions
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Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-06 14:06:17 +08:00
f34601df98
hw: lxbuildenv: fix uninitialized repo issue
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We would get stuck in a loop.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-05 22:08:11 +08:00
3df59a866d
metastable fix: wip
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Trying to figure out what's causing this problem.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-05 20:28:54 +08:00
73176b65de
hw: lxbuildenv: fix detection of .git directory
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It was giving an incorrect path, which would cause it to refresh
submodules during every build.
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-05 13:20:54 +08:00
350497924e
README: add simple readme file
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Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-05 09:17:20 +08:00
74ec6be245
hw: remove gitignore
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It's stored in the root now
Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-05 09:16:52 +08:00
1c8634e954
gitmodules: add hw deps
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Signed-off-by: Sean Cross <sean@xobs.io>
2019-03-05 09:16:36 +08:00
8fe27d9371
Add 'hw/' from commit 'd812378c4d61f7c957ac4bcba15a8344fb7fb458'
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git-subtree-dir: hw
git-subtree-mainline: e4af98b4aad812378c4d
2019-03-05 09:05:50 +08:00
