48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
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import csv
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class MappedReg:
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def __init__(self, readfn, writefn, name, addr, length, mode):
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self.readfn = readfn
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self.writefn = writefn
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self.addr = addr
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self.length = length
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self.mode = mode
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def read(self):
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if self.mode not in ["rw", "ro"]:
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raise KeyError(name + "register not readable")
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r = 0
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for i in range(self.length):
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r |= self.readfn(self.addr + 4*i)
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if i != (self.length-1):
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r <<= 8
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return r
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def write(self, value):
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if self.mode not in ["rw", "wo"]:
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raise KeyError(name + "register not writable")
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for i in range(self.length):
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dat = (value >> ((self.length-1-i)*8)) & 0xff
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self.writefn(self.addr + 4*i, dat)
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class MappedRegs:
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def __init__(self, d):
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self.d = d
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def __getattr__(self, attr):
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try:
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return self.__dict__['d'][attr]
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except KeyError:
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pass
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raise KeyError("No such register " + attr)
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def build_map(addrmap, readfn, writefn):
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csv_reader = csv.reader(open(addrmap), delimiter=',', quotechar='#')
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d = {}
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for item in csv_reader:
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name, addr, length, mode = item
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addr = int(addr.replace("0x", ""), 16)
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length = int(length)
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d[name] = MappedReg(readfn, writefn, name, addr, length, mode)
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return MappedRegs(d)
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