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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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