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            addr += cin_maxsize
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            addr += cin_maxsize
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        return string
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        return string
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    def i2cread(self, index, slaveaddr, startaddr, size):
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    def i2cread(self, index, slaveaddr, startaddr, size):
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        """ Reads data from an i2c slave """
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        """ Reads data from an i2c slave """
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        if size > 256 or size < 1:
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            raise ValueError("Size must be a number between 1 and 256")
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        if size == 256:
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        data = ""
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            size = 0
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        for i in range(size):
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        resp = self.lib.monitorcommand(struct.pack("IBBBBII", 8, index, slaveaddr, startaddr, size, 0, 0), "III%ds" % size, (None, None, None, "data"))
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            resp = self.lib.monitorcommand(struct.pack("IBBBBII", 8, index, slaveaddr, startaddr + i, 1, 0, 0), "III1s", (None, None, None, "data"))
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            data += resp.data
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        return resp.data
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        return data
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    def i2cwrite(self, index, slaveaddr, startaddr, data):
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    def i2cwrite(self, index, slaveaddr, startaddr, data):
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        """ Writes data to an i2c slave """
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        """ Writes data to an i2c slave """
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        size = len(data)
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        size = len(data)
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        if size > 256 or size < 1:
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        if size > 256 or size < 1: