?? rtccrc.lst
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C51 COMPILER V6.02 RTCCRC 12/11/2003 11:17:47 PAGE 1
C51 COMPILER V6.02, COMPILATION OF MODULE RTCCRC
OBJECT MODULE PLACED IN F:\MAIN00\ZHU9600_A\RTCCRC.OBJ
COMPILER INVOKED BY: C:\COMP51\C51.EXE F:\MAIN00\ZHU9600_A\RTCCRC.C DB SB OE LA
stmt level source
1 #include"at89x55.h"
2 #include"intrins.h"
3
4 #define uchar unsigned char
5 #define uint unsigned int
6
7 #define useRTC
8 //用到的系統資源
9 sbit T_SCLK = P1^0;
10 sbit T_IO = P1^1;
11 sbit T_RST = P1^2;
12
13 //操作:先命令字節,后數據字節;寫:先送數據位,后上升沿,數據位送出;讀:先下降沿,讀到數據位;
14 //是否用到它的RAM,NV(nonvolatile)掉電保存數據?
15 //CLOCK,RAM都設為突發模式,脈沖式電流充電,兩個二極管,4k歐
16 //根據匯編言語改寫
17
18 //寫
19 void write_ds(uchar aa,uchar bb)//aa:commmand,b:parament
20 {
21 1 uchar data i,cc;
22 1 T_SCLK=0; //時鐘停止
23 1 T_RST=0;
24 1 for(i=0;i<8;i++) //command byte
25 1 {
26 2 T_SCLK=0;
27 2 cc=aa>>i&0x01;
28 2 T_IO=cc;
29 2 _nop_();
30 2 T_SCLK=1;
31 2 }
32 1 for(i=0;i<8;i++) //parament byte
33 1 {
34 2 T_SCLK=0;
35 2 cc=bb>>i&0x01;
36 2 T_IO=cc;
37 2 _nop_();
38 2 T_SCLK=1;
39 2 }
40 1 T_RST=1; //時鐘運行
41 1 }
42 void clock_write(uchar * clock_w) //寫時鐘日歷
43 {
44 1 uchar data i,mm,nn;
45 1 for(i=0;i<6;i++)
46 1 {
47 2 mm=0x8C-i*2; //command,地址減2//年在前
48 2 if(i)mm-=2; //不寫星期
49 2 //nn=clock_w[i];
50 2 nn=*clock_w++;
51 2 nn=nn/10*16+nn%10;//parament,BCD2HEX
52 2 write_ds(mm,nn);
53 2 }
54 1 }
55 void setup_write() //設置時鐘控制,充電模式
C51 COMPILER V6.02 RTCCRC 12/11/2003 11:17:47 PAGE 2
56 {
57 1 write_ds(0x8E,0); //清寫保護
58 1 write_ds(0x90,0xAA); //兩二極管,40千歐方式充電
59 1 }
60
61 #ifdef useRTC
62 //讀
63
64 unsigned char read_ds(uchar aa)//aa:commmand
65 {
66 1 uchar data i=0,cc,dd=0;
67 1 T_SCLK=0; //時鐘停止
68 1 T_RST=0;
69 1 for(i=0;i<8;i++) //command byte
70 1 {
71 2 T_SCLK=0;
72 2 cc=aa>>i&0x01;
73 2 T_IO=cc;
74 2 _nop_();
75 2 _nop_();
76 2 T_SCLK=1;
77 2 }
78 1 for(i=0;i<8;i++) //read byte
79 1 {
80 2 T_SCLK=0;
81 2 cc=T_IO;
82 2 dd=dd+(cc<<i);
83 2 T_SCLK=1;
84 2 _nop_();
85 2 }
86 1 T_RST=1; //時鐘運行
87 1 return(dd);
88 1 }
89
90 void clock_read(uchar * pp)
91 {
92 1 uchar data i,mm,nn; //讀取的數據是HEX表示
93 1 pp+=6;
94 1 for(i=0;i<6;i++)
95 1 {
96 2 mm=0x81+i*2; //command
97 2 if(i==5)mm+=2; //不讀星期
98 2 nn=read_ds(mm);
99 2 nn=nn/16*10+nn%16; //BCD2Hex
100 2 *--pp=nn;
101 2 }
102 1 }
103 #endif
104 code const CRCTable[256]=
105 {
106 0x0000,0x1021,0x2042,0x3063,0x4084,0x50A5,0x60C6,0x70E7,
107 0x8108,0x9129,0xA14A,0xB16B,0xC18C,0xD1AD,0xE1CE,0xF1EF,
108 0x1231,0x0210,0x3273,0x2252,0x52B5,0x4294,0x72F7,0x62D6,
109 0x9339,0x8318,0xB37B,0xA35A,0xD3BD,0xC39C,0xF3FF,0xE3DE,
110 0x2462,0x3443,0x0420,0x1401,0x64E6,0x74C7,0x44A4,0x5485,
111 0xA56A,0xB54B,0x8528,0x9509,0xE5EE,0xF5CF,0xC5AC,0xD58D,
112 0x3653,0x2672,0x1611,0x0630,0x76D7,0x66F6,0x5695,0x46B4,
113 0xB75B,0xA77A,0x9719,0x8738,0xF7DF,0xE7FE,0xD79D,0xC7BC,
114 0x48C4,0x58E5,0x6886,0x78A7,0x0840,0x1861,0x2802,0x3823,
115 0xC9CC,0xD9ED,0xE98E,0xF9AF,0x8948,0x9969,0xA90A,0xB92B,
116 0x5AF5,0x4AD4,0x7AB7,0x6A96,0x1A71,0x0A50,0x3A33,0x2A12,
117 0xDBFD,0xCBDC,0xFBBF,0xEB9E,0x9B79,0x8B58,0xBB3B,0xAB1A,
C51 COMPILER V6.02 RTCCRC 12/11/2003 11:17:47 PAGE 3
118 0x6CA6,0x7C87,0x4CE4,0x5CC5,0x2C22,0x3C03,0x0C60,0x1C41,
119 0xEDAE,0xFD8F,0xCDEC,0xDDCD,0xAD2A,0xBD0B,0x8D68,0x9D49,
120 0x7E97,0x6EB6,0x5ED5,0x4EF4,0x3E13,0x2E32,0x1E51,0x0E70,
121 0xFF9F,0xEFBE,0xDFDD,0xCFFC,0xBF1B,0xAF3A,0x9F59,0x8F78,
122 0x9188,0x81A9,0xB1CA,0xA1EB,0xD10C,0xC12D,0xF14E,0xE16F,
123 0x1080,0x00A1,0x30C2,0x20E3,0x5004,0x4025,0x7046,0x6067,
124 0x83B9,0x9398,0xA3FB,0xB3DA,0xC33D,0xD31C,0xE37F,0xF35E,
125 0x02B1,0x1290,0x22F3,0x32D2,0x4235,0x5214,0x6277,0x7256,
126 0xB5EA,0xA5CB,0x95A8,0x8589,0xF56E,0xE54F,0xD52C,0xC50D,
127 0x34E2,0x24C3,0x14A0,0x0481,0x7466,0x6447,0x5424,0x4405,
128 0xA7DB,0xB7FA,0x8799,0x97B8,0xE75F,0xF77E,0xC71D,0xD73C,
129 0x26D3,0x36F2,0x0691,0x16B0,0x6657,0x7676,0x4615,0x5634,
130 0xD94C,0xC96D,0xF90E,0xE92F,0x99C8,0x89E9,0xB98A,0xA9AB,
131 0x5844,0x4865,0x7806,0x6827,0x18C0,0x08E1,0x3882,0x28A3,
132 0xCB7D,0xDB5C,0xEB3F,0xFB1E,0x8BF9,0x9BD8,0xABBB,0xBB9A,
133 0x4A75,0x5A54,0x6A37,0x7A16,0x0AF1,0x1AD0,0x2AB3,0x3A92,
134 0xFD2E,0xED0F,0xDD6C,0xCD4D,0xBDAA,0xAD8B,0x9DE8,0x8DC9,
135 0x7C26,0x6C07,0x5C64,0x4C45,0x3CA2,0x2C83,0x1CE0,0x0CC1,
136 0xEF1F,0xFF3E,0xCF5D,0xDF7C,0xAF9B,0xBFBA,0x8FD9,0x9FF8,
137 0x6E17,0x7E36,0x4E55,0x5E74,0x2E93,0x3EB2,0x0ED1,0x1EF0
138 };
139
140 uint CrcCheck(uchar * pData,uint nDataLength)
141 {
142 1 uint xdata i,j,checksum=0;
143 1 for(i=0;i<nDataLength;i++)
144 1 {
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