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rtio/sed/LaneDistributor: support specifying existing CRI

This commit is contained in:
Sebastien Bourdeauducq 2017-09-16 10:52:13 +08:00
parent 1cb05f3ed5
commit 064503f224
1 changed files with 4 additions and 3 deletions
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7
artiq/gateware/rtio/sed/lane_distributor.py
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@ -7,18 +7,19 @@ from artiq.gateware.rtio.sed import layouts
__all__ = ["LaneDistributor"] __all__ = ["LaneDistributor"]
# CRI write happens in 3 cycles: # CRI write happens in 3 cycles:
# 1. set timestamp # 1. set timestamp
# 2. set other payload elements and issue write command # 2. set other payload elements and issue write command
# 3. check status # 3. check status
class LaneDistributor(Module): class LaneDistributor(Module):
def __init__(self, lane_count, seqn_width, layout_payload, fine_ts_width, enable_spread=True): def __init__(self, lane_count, seqn_width, layout_payload, fine_ts_width, enable_spread=True, interface=None):
if lane_count & (lane_count - 1): if lane_count & (lane_count - 1):
raise NotImplementedError("lane count must be a power of 2") raise NotImplementedError("lane count must be a power of 2")
self.cri = cri.Interface() if interface is None:
interface = cri.Interface()
self.cri = interface
self.minimum_coarse_timestamp = Signal(64-fine_ts_width) self.minimum_coarse_timestamp = Signal(64-fine_ts_width)
self.lane_io = [Record(layouts.fifo_ingress(seqn_width, layout_payload)) self.lane_io = [Record(layouts.fifo_ingress(seqn_width, layout_payload))
for _ in range(lane_count)] for _ in range(lane_count)]