esptool.py 文件源码

def flash_digest(self, addr, length, digest_block_size=0):
        self._esp.write(struct.pack(b'<B', self.CMD_FLASH_DIGEST))
        self._esp.write(struct.pack(b'<III', addr, length, digest_block_size))
        digests = []
        while True:
            p = self._esp.read()
            if len(p) == 16:
                digests.append(p)
            elif len(p) == 1:
                status_code = struct.unpack('<B', p)[0]
                if status_code != 0:
                    raise FatalError('Write failure, status: %x' % status_code)
                break
            else:
                raise FatalError('Unexpected packet: %s' % hexify(p))
        return digests[-1], digests[:-1]