108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
//http://code.google.com/p/xtreamerdev/source/browse/trunk/rtdsr/?r=2#rtdsr%253Fstate%253Dclosed
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/* ymodem for RTD Serial Recovery (rtdsr)
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*
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* copyright (c) 2011 Pete B. <xtreamerdev@gmail.com>
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*
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* based on ymodem.h for bootldr, copyright (c) 2001 John G Dorsey
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef _HGL_YMODEM_H
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#define _HGL_YMODEM_H
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#define PACKET_SEQNO_INDEX (1)
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#define PACKET_SEQNO_COMP_INDEX (2)
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#define PACKET_HEADER (3) /* start, block, block-complement */
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#define PACKET_TRAILER (2) /* CRC bytes */
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#define PACKET_OVERHEAD (PACKET_HEADER + PACKET_TRAILER)
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#define PACKET_SIZE (128)
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#define PACKET_1K_SIZE (1024)
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#define PACKET_TIMEOUT (1)
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#define FILE_NAME_LENGTH (64)
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#define FILE_SIZE_LENGTH (16)
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/* Number of consecutive receive errors before giving up: */
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#define MAX_ERRORS (20)
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#define YMODEM_END_SESSION_SEND_CAN_NUM 0x07
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#define YMODEM_TIMEOUT 15
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/* ASCII control codes: */
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enum ymodem_code {
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YMODEM_CODE_NONE = 0x0,
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YMODEM_CODE_SOH = 0x01, /* start of 128-byte data packet */
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YMODEM_CODE_STX = 0x02, /* start of 1024-byte data packet */
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YMODEM_CODE_EOT = 0x04, /* end of transmission */
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YMODEM_CODE_ACK = 0x06, /* receive OK */
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YMODEM_CODE_NAK = 0x015, /* receiver error; retry */
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YMODEM_CODE_CAN = 0x018, /* two of these in succession aborts transfer */
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YMODEM_CODE_CRC = 0x43, /* use in place of first NAK for CRC mode */
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};
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enum ymodem_stage {
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YMODEM_STAGE_NONE,
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/* set when C is send */
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YMODEM_STAGE_ESTABLISHING,
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/* set when we've got the packet 0 and sent ACK and second C */
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YMODEM_STAGE_ESTABLISHED,
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/* set when the sender respond to our second C and recviever got a real
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* data packet. */
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YMODEM_STAGE_TRANSMITTING,
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/* set when the sender send a EOT */
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YMODEM_STAGE_FINISHING,
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/* set when transmission is really finished, i.e., after the NAK, C, final
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* NULL packet stuff. */
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YMODEM_STAGE_FINISHED,
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};
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struct ymodem {
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char file_name[FILE_NAME_LENGTH];
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unsigned long file_size;
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unsigned char *data; //If it is sending mode, it is file data, if it is receiving file, it will not be processed. 如果是发送文件,为文件数据,如果是接收文件,则不处理
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enum ymodem_stage stage;
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int (*putchar)(unsigned char ch);
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int (*getchar)(void);
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int (*begin_packet_cb)(const unsigned char *buf, unsigned long len);
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int (*data_packet_cb)(const unsigned char *buf, unsigned long len);
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int (*end_packet_cb)(const unsigned char *buf, unsigned long len);
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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int ymodem_receive(struct ymodem *ymodem);
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int ymodem_send(struct ymodem *ymodem);
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void put_start_char();
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int flush_serial_input();
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#ifdef __cplusplus
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}
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#endif
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#endif /*_HGL_YMODEM_H*/ |