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| 1 | 6 | kaklik | /*! \file xmodem.h \brief XModem Transmit/Receive Implementation with CRC and 1K support. */ |
| 2 | //***************************************************************************** |
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| 3 | // |
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| 4 | // File Name : 'xmodem.h' |
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| 5 | // Title : XModem Transmit/Receive Implementation with CRC and 1K support |
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| 6 | // Author : Pascal Stang - Copyright (C) 2006 |
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| 7 | // Created : 4/22/2006 |
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| 8 | // Revised : 7/22/2006 |
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| 9 | // Version : 0.1 |
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| 10 | // Target MCU : AVR processors |
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| 11 | // Editor Tabs : 4 |
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| 12 | // |
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| 13 | /// \ingroup general |
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| 14 | /// \defgroup xmodem XModem Transmit/Receive Implementation with CRC and 1K support (xmodem.c) |
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| 15 | /// \code #include "xmodem.h" \endcode |
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| 16 | /// \par Overview |
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| 17 | /// This XModem implementation supports both 128b and 1K packets with or |
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| 18 | /// without CRC checking. The xmodem library must be initialized to use |
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| 19 | /// a particular I/O stream by passing appropriate getbyte() and sendbyte() |
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| 20 | /// functions to xmodemInit(). The xmodem transfer routines also expect |
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| 21 | /// function pointers to read and write data blocks on the local system. |
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| 22 | /// While this use of function pointers increases code size, it has great |
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| 23 | /// adaptability. The generalized read/write data functions mean that it |
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| 24 | /// is easy to pipe data to/from any storage device like EEPROMs or flash |
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| 25 | /// cards, rather than being limited to just processor RAM. |
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| 26 | // |
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| 27 | // This code is distributed under the GNU Public License |
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| 28 | // which can be found at http://www.gnu.org/licenses/gpl.txt |
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| 29 | // |
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| 30 | //***************************************************************************** |
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| 31 | //@{ |
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| 32 | |||
| 33 | #ifndef XMODEM_H |
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| 34 | #define XMODEM_H |
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| 35 | |||
| 36 | // xmodem control characters |
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| 37 | #define SOH 0x01 |
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| 38 | #define STX 0x02 |
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| 39 | #define EOT 0x04 |
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| 40 | #define ACK 0x06 |
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| 41 | #define NAK 0x15 |
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| 42 | #define CAN 0x18 |
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| 43 | #define CTRLZ 0x1A |
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| 44 | |||
| 45 | // xmodem timeout/retry parameters |
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| 46 | #define XMODEM_TIMEOUT_DELAY 1000 |
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| 47 | #define XMODEM_RETRY_LIMIT 16 |
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| 48 | |||
| 49 | // error return codes |
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| 50 | #define XMODEM_ERROR_REMOTECANCEL -1 |
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| 51 | #define XMODEM_ERROR_OUTOFSYNC -2 |
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| 52 | #define XMODEM_ERROR_RETRYEXCEED -3 |
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| 53 | |||
| 54 | |||
| 55 | //! initialize xmodem stream I/O routines |
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| 56 | void xmodemInit(void (*sendbyte_func)(unsigned char c), int (*getbyte_func)(void)); |
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| 57 | |||
| 58 | //! xmodem receive |
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| 59 | long xmodemReceive( int (*write)(unsigned char* buffer, int size) ); |
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| 60 | |||
| 61 | //! xmodem transmit |
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| 62 | long xmodemTransmit( int (*read)(unsigned char* buffer, int size) ); |
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| 63 | |||
| 64 | //! xmodem CRC/checksum error checking |
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| 65 | int xmodemCrcCheck(int crcflag, const unsigned char *buffer, int size); |
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| 66 | |||
| 67 | // extra stream I/O functions |
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| 68 | //! get incoming character (wait for timeout) |
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| 69 | int xmodemInTime(unsigned short timeout); |
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| 70 | |||
| 71 | //! flush incoming character stream |
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| 72 | void xmodemInFlush(void); |
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| 73 | |||
| 74 | #endif |
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| 75 | |||
| 76 | //@} |
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