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frontend/axi: improve len/size comment (-1), set default id_width to 1

This commit is contained in:
Florent Kermarrec 2018-11-09 15:29:31 +01:00
parent 71be616817
commit 3586e157f2
1 changed files with 3 additions and 3 deletions
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6
litedram/frontend/axi.py
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@ -38,8 +38,8 @@ def ax_description(address_width, id_width):
return [ return [
("addr", address_width), ("addr", address_width),
("burst", 2), # Burst type ("burst", 2), # Burst type
("len", 8), # Number of data transfers (up to 256) ("len", 8), # Number of data (-1) transfers (up to 256)
("size", 4), # Number of bytes of each data transfer (up to 1024 bits) ("size", 4), # Number of bytes (-1) of each data transfer (up to 1024 bits)
("id", id_width) ("id", id_width)
] ]
@ -64,7 +64,7 @@ def r_description(data_width, id_width):
class LiteDRAMAXIPort(Record): class LiteDRAMAXIPort(Record):
def __init__(self, data_width, address_width, id_width, clock_domain="sys"): def __init__(self, data_width, address_width, id_width=1, clock_domain="sys"):
self.data_width = data_width self.data_width = data_width
self.address_width = address_width self.address_width = address_width
self.id_width = id_width self.id_width = id_width