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65 lines
2 KiB
C
65 lines
2 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2020 tharexde
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Low frequency EM4x50 structs
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//-----------------------------------------------------------------------------
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#ifndef EM4X50_H__
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#define EM4X50_H__
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#define EM4X50_NO_WORDS 34
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// special words
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#define EM4X50_DEVICE_PASSWORD 0
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#define EM4X50_PROTECTION 1
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#define EM4X50_CONTROL 2
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#define EM4X50_DEVICE_SERIAL 32
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#define EM4X50_DEVICE_ID 33
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// control word (word = 4 bytes)
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#define FIRST_WORD_READ 0 // first byte
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#define LAST_WORD_READ 1 // second byte
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#define CONFIG_BLOCK 2 // third byte
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#define PASSWORD_CHECK 0x80 // first bit in third byte
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#define READ_AFTER_WRITE 0x40 // second bit in third byte
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// protection word
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#define FIRST_WORD_READ_PROTECTED 0 // first byte
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#define LAST_WORD_READ_PROTECTED 1 // second byte
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#define FIRST_WORD_WRITE_INHIBITED 2 // third byte
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#define LAST_WORD_WRITE_INHIBITED 3 // fourth byte
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// misc
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#define STATUS_NO_WORDS 0xfc
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#define STATUS_SUCCESS 0x2
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#define STATUS_LOGIN 0x1
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#define NO_CHARS_MAX 400
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#define TIMEOUT 2000
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typedef struct {
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bool addr_given;
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bool pwd_given;
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bool newpwd_given;
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uint8_t password[4];
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uint8_t new_password[4];
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uint8_t addresses[4];
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uint8_t address;
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uint8_t word[4];
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} PACKED em4x50_data_t;
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typedef struct {
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uint8_t byte[4];
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uint8_t row_parity[4];
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uint8_t col_parity;
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uint8_t stopbit;
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bool rparity[4];
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bool cparity[8];
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bool stopparity;
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bool parity;
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} PACKED em4x50_word_t;
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#endif /* EM4X50_H__ */
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