109 lines
4.2 KiB
Python
109 lines
4.2 KiB
Python
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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__name__ = "ExtendedMFRC522"
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from mfrc522 import SimpleMFRC522
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class ExtendedMFRC522(SimpleMFRC522):
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def __init__(self, start_section=1, sections=0, blocks_per_section=4, block_size=16, encoding='utf8'):
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self.START_SECTION = start_section
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self.SECTIONS = sections
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self.BLOCKS_PER_SECTIONS = blocks_per_section
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self.DATA_BLOCKS = self.BLOCKS_PER_SECTIONS - 1
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self.BLOCK_SIZE = block_size
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self.ENCODING = encoding
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if self.START_SECTION < 1:
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self.START_SECTION = 1
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super().__init__()
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def read_no_block(self):
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(status, size) = self.READER.MFRC522_Request(self.READER.PICC_REQIDL)
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if status != self.READER.MI_OK:
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return None, None
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(status, uid) = self.READER.MFRC522_Anticoll()
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if status != self.READER.MI_OK:
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return None, None
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id = self.uid_to_num(uid)
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self.READER.MFRC522_SelectTag(uid)
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data = bytearray()
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start_section = self.START_SECTION
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if start_section > size:
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start_section = size - 1
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sections = size - start_section
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if self.SECTIONS > 0 and self.SECTIONS <= sections:
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sections = self.SECTIONS
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for section in range(start_section, start_section + sections):
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trailer_block = section * self.BLOCKS_PER_SECTIONS + self.DATA_BLOCKS
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status = self.READER.MFRC522_Auth(
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self.READER.PICC_AUTHENT1A, trailer_block, self.KEY, uid)
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if status == self.READER.MI_OK:
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for i in range(self.DATA_BLOCKS):
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block_addr = section * self.BLOCKS_PER_SECTIONS + i
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block = self.READER.MFRC522_Read(block_addr)
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if block:
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data.extend(bytearray(block))
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else:
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return None, None
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text_read = ''
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if data:
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while data and data[0] == 0:
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data.pop(0)
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while data and data[-1] == 0:
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data.pop()
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if data:
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text_read = data.decode(self.ENCODING)
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self.READER.MFRC522_StopCrypto1()
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return id, text_read
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def write_no_block(self, text):
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(status, size) = self.READER.MFRC522_Request(self.READER.PICC_REQIDL)
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if status != self.READER.MI_OK:
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return None, None
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(status, uid) = self.READER.MFRC522_Anticoll()
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if status != self.READER.MI_OK:
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return None, None
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id = self.uid_to_num(uid)
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self.READER.MFRC522_SelectTag(uid)
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start_section = self.START_SECTION
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if start_section > size:
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start_section = size - 1
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sections = size - start_section
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if self.SECTIONS > 0 and self.SECTIONS <= sections:
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sections = self.SECTIONS
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data = text.strip().encode(self.ENCODING)
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data_sections = [data[i:i + self.BLOCK_SIZE * self.DATA_BLOCKS]
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for i in range(0, len(data), self.BLOCK_SIZE * self.DATA_BLOCKS)]
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for section in range(start_section, start_section + sections):
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trailer_block = section * self.BLOCKS_PER_SECTIONS + self.DATA_BLOCKS
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status = self.READER.MFRC522_Auth(
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self.READER.PICC_AUTHENT1A, trailer_block, self.KEY, uid)
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self.READER.MFRC522_Read(trailer_block)
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section_data = bytearray(self.DATA_BLOCKS * self.BLOCK_SIZE)
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if len(data_sections) > (section - start_section):
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section_data = bytearray(
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data_sections[section - start_section])
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section_data.extend(
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bytearray(self.DATA_BLOCKS * self.BLOCK_SIZE - len(section_data)))
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if status == self.READER.MI_OK:
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for i in range(self.DATA_BLOCKS):
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block_addr = section * self.BLOCKS_PER_SECTIONS + i
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block_data = section_data[(
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i*self.BLOCK_SIZE):(i+1)*self.BLOCK_SIZE]
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self.READER.MFRC522_Write(
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block_addr, block_data)
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self.READER.MFRC522_StopCrypto1()
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return id, data[0:(len(self.BLOCK_ADDRS) * self.BLOCK_SIZE * sections)].decode(self.ENCODING)
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