diff options
| author | whitequark <whitequark@whitequark.org> | 2019-10-03 02:56:47 +0000 |
|---|---|---|
| committer | whitequark <whitequark@whitequark.org> | 2019-10-03 02:59:20 +0000 |
| commit | 5f30a7890a60824ac0a76c409d10b5df0e3c043f (patch) | |
| tree | ad122181a047dde390d9985608a27802ad41e2b0 /nmigen_boards/mercury.py | |
| parent | 1da974cdacebc0d4e5e9f0864b374afe3c6b8102 (diff) | |
[breaking-change] Factor out "display_7seg" resource.
With the expectation that "display_9seg", "display_14seg" and
"display_16seg" will be forthcoming.
There are no provisions in this resource itself for multiplexing
the display. It is expected that on boards with multiplexed displays,
an additional resource "display_7seg_ctrl" will be provided, and it
would have either an n-bit signal "sel" (binary encoded) or an n-bit
signal "en" (one-hot encoded). (This may be revisited in the future.)
Fixes #17.
Diffstat (limited to 'nmigen_boards/mercury.py')
| -rw-r--r-- | nmigen_boards/mercury.py | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/nmigen_boards/mercury.py b/nmigen_boards/mercury.py index c14e85c..5395fba 100644 --- a/nmigen_boards/mercury.py +++ b/nmigen_boards/mercury.py @@ -4,6 +4,7 @@ import subprocess from nmigen.build import * from nmigen.vendor.xilinx_spartan_3_6 import * from .dev import * +from .dev.user import Display7SegResource __all__ = ["MercuryPlatform"] @@ -176,18 +177,14 @@ class MercuryPlatform(XilinxSpartan3APlatform): ] _sevenseg = [ - Resource("sevenseg", 0, - Subsignal("a", PinsN("13", dir="o", conn=("gpio", 0))), - Subsignal("b", PinsN("14", dir="o", conn=("gpio", 0))), - Subsignal("c", PinsN("15", dir="o", conn=("gpio", 0))), - Subsignal("d", PinsN("16", dir="o", conn=("gpio", 0))), - Subsignal("e", PinsN("17", dir="o", conn=("gpio", 0))), - Subsignal("f", PinsN("18", dir="o", conn=("gpio", 0))), - Subsignal("g", PinsN("19", dir="o", conn=("gpio", 0))), - Subsignal("dp", PinsN("20", dir="o", conn=("gpio", 0))), - Subsignal("en", Pins("9 10 11 12", dir="o", - conn=("gpio", 0))), - Attrs(IOSTANDARD="LVTTL") + Display7SegResource(0, + a="gpio_0:13", b="gpio_0:14", c="gpio_0:15", d="gpio_0:16", + e="gpio_0:17", f="gpio_0:18", g="gpio_0:19", dp="gpio_0:20", + invert=True, attrs=Attrs(IOSTANDARD="LVTTL") + ), + Resource("display_7seg_ctrl", 0, + Subsignal("en", Pins("9 10 11 12", dir="o", conn=("gpio", 0))), + Attrs(IOSTANDARD="LVTTL") ) ] |