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host/driver/reg: use burst mode to speed up upload of data (useful with Etherbone)

This commit is contained in:
Florent Kermarrec 2015-02-23 00:09:31 +01:00
parent a802a5c535
commit 861c54760e
1 changed files with 13 additions and 8 deletions
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21
litescope/host/driver/reg.py
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@ -12,19 +12,24 @@ class MappedReg:
def read(self): def read(self):
if self.mode not in ["rw", "ro"]: if self.mode not in ["rw", "ro"]:
raise KeyError(name + "register not readable") raise KeyError(name + "register not readable")
r = 0 datas = self.readfn(self.addr, burst_length=self.length)
for i in range(self.length): if isinstance(datas, int):
r |= self.readfn(self.addr + 4*i) return datas
if i != (self.length-1): else:
r <<= self.busword data = 0
return r for i in range(self.length):
data |= datas[i]
if i != (self.length-1):
data <<= self.busword
return data
def write(self, value): def write(self, value):
if self.mode not in ["rw", "wo"]: if self.mode not in ["rw", "wo"]:
raise KeyError(name + "register not writable") raise KeyError(name + "register not writable")
datas = []
for i in range(self.length): for i in range(self.length):
dat = (value >> ((self.length-1-i)*self.busword)) & (2**self.busword-1) datas.append((value >> ((self.length-1-i)*self.busword)) & (2**self.busword-1))
self.writefn(self.addr + 4*i, dat) self.writefn(self.addr, datas)
class MappedRegs: class MappedRegs:
def __init__(self, d): def __init__(self, d):