📄 dds.lst
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C51 COMPILER V8.04 DDS 10/31/2006 11:10:06 PAGE 1
C51 COMPILER V8.04, COMPILATION OF MODULE DDS
OBJECT MODULE PLACED IN E:\03440136\资料会总9.7\程序9.7\7279C发送接收程序\DDS.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE E:\03440136\资料会总9.7\程序9.7\7279C发送接收程序\DDS.C DB SB OE OT(0)
line level source
1 //用于MCS51的C语言例子程序
2 //这是用于7279A评估板的C51子程序
3 #include<reg51.h>
4 //#include<at89x55>
5
6 //***函数定义***
7 void long_delay(void); //***长延时***
8 void short_delay(void); //***短延时***
9 void delay10ms(unsigned char); //延时10MS
10 void write7279(unsigned char, unsigned char);// 写入到HD7279
11 unsigned char read7279(unsigned char);// 从HD7279读出
12 void send_byte(unsigned char); //发送一个字节
13 unsigned char receive_byte(void); //接收一个字节
14
15 //**定义变量及I/O口**
16
17 unsigned char digit[5];
18 unsigned char key_number, j, k;
19 unsigned int tmr,sum=0;
20 unsigned char cnter=1;
21
22 sbit cs=P1^0; // cs at P1.0
23 sbit clk=P1^1; // clk 连接于P1.1
24 sbit dat=P1^2; // data 连接于P1.2
25 sbit key=P1^3; // key 连接于P1.3
26
27 //****** HD7279A指令 ******
28 #define CMD_RESET 0xa4 //复位（清除）指令
29 #define CMD_TEST 0xbf //测试指令
30 #define DECODE0 0x80
31 #define DECODE1 0xc8
32 #define CMD_READ 0x15
33 #define UNDECODE 0x90
34 #define RTL_CYCLE 0xa3
35 #define RTR_CYCLE 0xa2
36 #define RTL_UNCYL 0xa1
37 #define RTR_UNCYL 0xa0
38 #define ACTCTL 0x98
39 #define SEGON 0xe0
40 #define SEGOFF 0xc0
41 #define BLINKCTL 0x88
42
43 //***主程序***
44 void main()
45 {
46 1 while(1)
47 1 {
48 2 for (tmr=0;tmr<0x2000;tmr++); //上电延时
49 2 send_byte(CMD_RESET); // 复位HD7279A
50 2 while (1)
51 2 {
52 3 if (!key) //如果有键按下
53 3 {
54 4 key_number=read7279(CMD_READ);//读出键码
55 4 P0=key_number;
C51 COMPILER V8.04 DDS 10/31/2006 11:10:06 PAGE 2
56 4 //sum=sum+cnter*key_number;
57 4 //cnter=cnter*10;
58 4 write7279(DECODE1+7,key_number&0x0F);//显示键码
59 4 send_byte(RTL_CYCLE); // 循环左移23次
60 4 delay10ms(12);
61 4 while (!key); //等待按键放开
62 4 cnter+=1;
63 4 }
64 3 }
65 2 cnter=0;
66 2 }
67 1 }
68
69 //**********************************************
70 //****写****
71 void write7279(unsigned char cmd, unsigned char dta)
72 {
73 1 send_byte (cmd);
74 1 send_byte (dta);
75 1 }
76
77 //*********读出********
78 unsigned char read7279(unsigned char command)
79 {
80 1 send_byte(command);
81 1 return(receive_byte());
82 1 }
83
84 //***发送***
85 void send_byte( unsigned char out_byte)
86 {
87 1 unsigned char i;
88 1 cs=0;
89 1 long_delay();
90 1 for (i=0;i<8;i++)
91 1 {
92 2 if (out_byte&0x80)
93 2 {dat=1;}
94 2 else
95 2 {dat=0;}
96 2 clk=1;
97 2 short_delay();
98 2 clk=0;
99 2 short_delay();
100 2 out_byte=out_byte*2;
101 2 }
102 1 dat=0;
103 1 }
104
105 //***接收***
106 unsigned char receive_byte(void)
107 {
108 1 unsigned char i, in_byte;
109 1 dat=1; //设为输入状态
110 1 long_delay();
111 1 for (i=0;i<8;i++)
112 1 {
113 2 clk=1;
114 2 short_delay();
115 2 in_byte=in_byte*2;
116 2 if (dat)
117 2 {in_byte=in_byte|0x01;}
C51 COMPILER V8.04 DDS 10/31/2006 11:10:06 PAGE 3
118 2 clk=0;
119 2 short_delay();
120 2 }
121 1 dat=0;
122 1 return (in_byte);
123 1 }
124
125 //***长延时***
126 void long_delay(void)
127 {
128 1 unsigned char i;
129 1 for (i=0;i<0x30;i++);
130 1 }
131
132 //***短延时***
133 void short_delay(void)
134 {
135 1 unsigned char i;
136 1 for (i=0;i<8;i++);
137 1 }
138 // ********************* 延时n*10ms **********************
139 void delay10ms(unsigned char time)
140 {
141 1 unsigned char i;
142 1 unsigned int j;
143 1 for (i=0;i<time;i++)
144 1 {
145 2 for(j=0;j<0x390;j++)
146 2 {
147 3 if (!key)
148 3 {
149 4 //key_int();
150 4 }
151 3 }
152 2 }
153 1 }
C51 COMPILER V8.04 DDS 10/31/2006 11:10:06 PAGE 4
NAME CLASS MSPACE TYPE OFFSET SIZE
==== ===== ====== ==== ====== ====
receive_byte . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
i. . . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
in_byte. . . . . . . . . . . . . . . AUTO DATA U_CHAR 0001H 1
P0 . . . . . . . . . . . . . . . . . . SFR DATA U_CHAR 0080H 1
P1 . . . . . . . . . . . . . . . . . . SFR DATA U_CHAR 0090H 1
_write7279 . . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
cmd. . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
dta. . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0001H 1
digit. . . . . . . . . . . . . . . . . PUBLIC DATA ARRAY 0000H 5
cnter. . . . . . . . . . . . . . . . . PUBLIC DATA U_CHAR 0005H 1
long_delay . . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
i. . . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
short_delay. . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
i. . . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
main . . . . . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
key_number . . . . . . . . . . . . . . PUBLIC DATA U_CHAR 0006H 1
dat. . . . . . . . . . . . . . . . . . ABSBIT ----- BIT 0092H 1
clk. . . . . . . . . . . . . . . . . . ABSBIT ----- BIT 0091H 1
_send_byte . . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
out_byte . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
i. . . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0001H 1
key. . . . . . . . . . . . . . . . . . ABSBIT ----- BIT 0093H 1
tmr. . . . . . . . . . . . . . . . . . PUBLIC DATA U_INT 0007H 2
_delay10ms . . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
time . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
i. . . . . . . . . . . . . . . . . . AUTO DATA U_CHAR 0001H 1
j. . . . . . . . . . . . . . . . . . AUTO DATA U_INT 0002H 2
cs . . . . . . . . . . . . . . . . . . ABSBIT ----- BIT 0090H 1
sum. . . . . . . . . . . . . . . . . . PUBLIC DATA U_INT 0009H 2
j. . . . . . . . . . . . . . . . . . . PUBLIC DATA U_CHAR 000BH 1
k. . . . . . . . . . . . . . . . . . . PUBLIC DATA U_CHAR 000CH 1
_read7279. . . . . . . . . . . . . . . PUBLIC CODE PROC 0000H -----
command. . . . . . . . . . . . . . . AUTO DATA U_CHAR 0000H 1
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 271 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 26 ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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