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cores/prbs: Change wrap parameter to with_errors_saturation (opposite) and disable saturation by default.

This commit is contained in:
Florent Kermarrec 2021-12-14 09:35:17 +01:00
parent fda682a4a6
commit a6ed4c5c09
1 changed files with 5 additions and 5 deletions
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10
litex/soc/cores/prbs.py
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@ -137,7 +137,7 @@ class PRBS31Checker(PRBSChecker):
# PRBS RX ------------------------------------------------------------------------------------------ # PRBS RX ------------------------------------------------------------------------------------------
class PRBSRX(Module): class PRBSRX(Module):
def __init__(self, width, reverse=False, wrap=False): def __init__(self, width, reverse=False, with_errors_saturation=False):
self.config = Signal(2) self.config = Signal(2)
self.pause = Signal() self.pause = Signal()
self.i = Signal(width) self.i = Signal(width)
@ -147,14 +147,14 @@ class PRBSRX(Module):
config = Signal(2) config = Signal(2)
# Optional bits reversing # Optional bits reversing.
prbs_data = self.i prbs_data = self.i
if reverse: if reverse:
new_prbs_data = Signal(width) new_prbs_data = Signal(width)
self.comb += new_prbs_data.eq(prbs_data[::-1]) self.comb += new_prbs_data.eq(prbs_data[::-1])
prbs_data = new_prbs_data prbs_data = new_prbs_data
# Checkers # Checkers.
self.specials += MultiReg(self.config, config) self.specials += MultiReg(self.config, config)
prbs7 = PRBS7Checker(width) prbs7 = PRBS7Checker(width)
prbs15 = PRBS15Checker(width) prbs15 = PRBS15Checker(width)
@ -166,11 +166,11 @@ class PRBSRX(Module):
prbs31.i.eq(prbs_data) prbs31.i.eq(prbs_data)
] ]
# Errors count # Errors count (with optional saturation).
self.sync += [ self.sync += [
If(config == 0, If(config == 0,
errors.eq(0) errors.eq(0)
).Elif(~self.pause & ((errors != (2**32-1)) | wrap), ).Elif(~self.pause & (~with_errors_saturation | (errors != (2**32-1))),
If(config == 0b01, If(config == 0b01,
errors.eq(errors + (prbs7.errors != 0)) errors.eq(errors + (prbs7.errors != 0))
).Elif(config == 0b10, ).Elif(config == 0b10,