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rtio: do not create spurious CSRs when data_width/address_width is 0

This commit is contained in:
Sebastien Bourdeauducq 2015-04-16 13:04:19 +08:00
parent 26003781b4
commit 6215d63491
1 changed files with 9 additions and 6 deletions
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9
artiq/gateware/rtio/core.py
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@ -268,7 +268,9 @@ class _KernelCSRs(AutoCSR):
self.reset = CSRStorage(reset=1)
self.chan_sel = CSRStorage(chan_sel_width)
if data_width:
self.o_data = CSRStorage(data_width)
if address_width:
self.o_address = CSRStorage(address_width)
self.o_timestamp = CSRStorage(full_ts_width)
self.o_we = CSR()
@ -276,6 +278,7 @@ class _KernelCSRs(AutoCSR):
self.o_underflow_reset = CSR()
self.o_sequence_error_reset = CSR()
if data_width:
self.i_data = CSRStatus(data_width)
self.i_timestamp = CSRStatus(full_ts_width)
self.i_re = CSR()
@ -299,8 +302,7 @@ class RTIO(Module):
# CSRs
self.csrs = _CSRs()
self.kcsrs = _KernelCSRs(bits_for(len(channels)-1),
max(data_width, 1),
max(address_width, 1),
data_width, address_width,
counter_width + fine_ts_width)
# Clocking/Reset
@ -391,8 +393,9 @@ class RTIO(Module):
i_datas.append(0)
i_timestamps.append(0)
i_statuses.append(0)
if data_width:
self.comb += self.kcsrs.i_data.status.eq(Array(i_datas)[sel])
self.comb += [
self.kcsrs.i_data.status.eq(Array(i_datas)[sel]),
self.kcsrs.i_timestamp.status.eq(Array(i_timestamps)[sel]),
self.kcsrs.o_status.status.eq(Array(o_statuses)[sel]),
self.kcsrs.i_status.status.eq(Array(i_statuses)[sel])