?? xmodem.lst
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C51 COMPILER V8.16 XMODEM 12/09/2009 15:02:55 PAGE 1
C51 COMPILER V8.16, COMPILATION OF MODULE XMODEM
OBJECT MODULE PLACED IN xmodem.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE xmodem.c BROWSE
line level source
1 #include <reg52.h>
2 #include <string.h>
3 #include <intrins.h>
4 #include <stdio.h>
5 #include <absacc.h>
6 #include "FlashRam.h"
7 extern int TimeSec;
8
9 /*
10 Xmodem Frame form: <SOH><blk><255-blk><--128 data bytes--><CRC hi><CRC lo>
11 1K-Xmodem Frame form: <SOH><blk><255-blk><--1024 data bytes--><CRC hi><CRC lo>
12 */
13 //#define XMODEM_SOH 0x01
14 //#define XMODEM_STX 0x02
15 #define XMODEM_EOT 0x04
16 #define XMODEM_ACK 0x06
17 #define XMODEM_NAK 0x15
18 #define XMODEM_CAN 0x18 // Cancel
19
20
21 #define USE_1K_XMODEM 1 /* 1 for use 1k_xmodem, 0 for xmodem */
22
23 #if (USE_1K_XMODEM) //for 1K xmodem protocol
24 #define XMODEM_DATA_SIZE 1024
25 #define XMODEM_HEAD 0x02
26
27 #else //for Xmodem protocol
#define XMODEM_DATA_SIZE 128
#define XMODEM_HEAD 0x01
#endif
32
33 unsigned char xdata frame_data[128];
34 unsigned char pack_counter = 0;
35 // Table of CRC constants - implements x^16+x^12+x^5+1
36 unsigned int code crc16_tab[] = {
37 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
38 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
39 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
40 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
41 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
42 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
43 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
44 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
45 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
46 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
47 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
48 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
49 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
50 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
51 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
52 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
53 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
54 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
55 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
C51 COMPILER V8.16 XMODEM 12/09/2009 15:02:55 PAGE 2
56 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
57 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
58 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
59 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
60 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
61 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
62 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
63 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
64 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
65 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
66 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
67 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
68 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
69 };
70
71 /*
72 // 計算CRC
73 unsigned int crc16(unsigned char *buf, int len)
74 {
75 int i;
76 unsigned int cksum;
77
78 cksum = 0;
79 for (i = 0; i < len; i++) {
80 cksum = crc16_tab[((cksum>>8) ^ buf[i]) & 0xFF] ^ (cksum << 8);
81 }
82 return cksum;
83 } */
84
85 // 從串口接收一字節(jié)
86 unsigned char serial_get_char(void)
87 {
88 1 unsigned char cTm;
89 1 while(!RI);
90 1 cTm = SBUF;
91 1 RI=0;
92 1 return cTm;
93 1 }
94
95 // 向串口發(fā)送一字節(jié)
96 void serial_put_char(unsigned char c)
97 {
98 1 while(!TI);
99 1 TI=0;
100 1 SBUF=c;
101 1 }
102
103 // 等串口有數(shù)據(jù)
104 // 返回0=無數(shù)據(jù),1=有數(shù)據(jù)
105 char WaitChar(int tn)
106 {
107 1 unsigned long ulTmo;
108 1 while(tn--)
109 1 {
110 2 for (ulTmo=0; ulTmo<40000; ulTmo++)
111 2 {
112 3 if (RI)return 1;
113 3 }
114 2 }
115 1 return 0;
116 1 }
117
C51 COMPILER V8.16 XMODEM 12/09/2009 15:02:55 PAGE 3
118 // 發(fā)送數(shù)據(jù)幀
119 void SendRecord(unsigned char * buff)
120 {
121 1 unsigned int chk;
122 1 int i;
123 1
124 1 serial_put_char(XMODEM_HEAD);
125 1 serial_put_char(pack_counter);
126 1 serial_put_char(255-pack_counter);
127 1 chk = 0;
128 1 for(i=0; i < XMODEM_DATA_SIZE; ++i)
129 1 {
130 2 chk = crc16_tab[((chk>>8) ^ buff[i]) & 0xFF] ^ (chk << 8);
131 2 serial_put_char(buff[i]);
132 2 }
133 1 serial_put_char((chk >> 8));
134 1 serial_put_char(chk);
135 1 }
136
137 // xmodem協(xié)議發(fā)送文件
138 // 收到請求符"C"后進入此函數(shù)
139 int xmodem_tx(void)
140 {
141 1 char complete,retry_num;
142 1 unsigned char ack_id;
143 1
144 1 if (fopen()<0)
145 1 {
146 2 return(2);
147 2 }
148 1
149 1 ack_id = XMODEM_ACK;
150 1 pack_counter = 0;
151 1 complete = 0;
152 1
153 1 while (complete == 0)
154 1 {
155 2 switch (ack_id)
156 2 {
157 3 case XMODEM_ACK: // 正確應答
158 3 retry_num = 0;
159 3 pack_counter ++;
160 3 memset(frame_data,0,XMODEM_DATA_SIZE); // 緩沖區(qū)清零
161 3 if (fread(frame_data,XMODEM_DATA_SIZE)>0) // 從flash讀取數(shù)據(jù)到緩沖區(qū)
162 3 {
163 4 SendRecord(frame_data); // 發(fā)送數(shù)據(jù)幀
164 4 ack_id = serial_get_char(); // 等應答
165 4 break;
166 4 }
167 3 else // 數(shù)據(jù)已傳送完
168 3 {
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