Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

[ARM] problem in i2c protocol

Status
Not open for further replies.

priyaembedded

Newbie level 1
Joined
Jun 9, 2015
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
18
hi
I am using keil and lpc2138 interface with 24lc512 eeprom by using i2c protocol but i am facing a problem below is my program


Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
#include<lpc213x.h>
#define RS 16
#define RW 17
#define EN 18
 
void delay(unsigned int j)
{  unsigned int q,w;
    for(q=0;q<j;q++)
    for(w=0;w<j;w++);
}
 
void cmd(unsigned char a)
{
    IOCLR1=0xffffffff;
    IOCLR0=0xff<<8;
    IOSET0=a<<8;
    IOSET1=1<<18;
    delay(5);
    IOCLR1=1<<18;
 
}
void data(unsigned char b)
{
    IOCLR1=0xffffffff;
    IOSET1=1<<16;
    IOCLR0=0xff<<8;
    IOSET0=b<<8;
    IOSET1=1<<18;
    delay(5);
    IOCLR1=1<<18;
 
}
void wrte(unsigned int adr,unsigned char dat)
{
I2C0CONCLR=0x000000ff;
 
I2C0CONSET=1<<6;
 
I2C0CONSET=0x20;
while(I2C0STAT!=0x08);
 
I2C0CONCLR=0x28;
 
I2C0DAT=0xA0;
I2C0CONCLR=0x08;
while(I2C0STAT!=0x18);
 
I2C0DAT=(adr&0xff00)>>8;
I2C0CONCLR=0x08;
while(I2C0STAT!=0x28);
 
I2C0DAT=(adr&0x00ff);
I2C0CONCLR=0x08;
while(I2C0STAT!=0x28);
 
I2C0DAT=dat;
I2C0CONCLR=0x08;
while(I2C0STAT!=0x28);
I2C0CONCLR=0x08;
 
I2C0CONSET=1<<4;
delay(10);
}
 
 
lcd_init()
{
    cmd(0x38);
    cmd(0x0E);
}
 
void main()
{ unsigned int l;
IODIR0=0xffffffff;
IODIR1=0xffffffff;
PINSEL0=((1<<4)|(1<<6));
lcd_init();  
cmd(0x80);
data(0x39);
VPBDIV=0x01;
I2C0SCLL=80;
I2C0SCLH=70;
 
   wrte(0,10); cmd(0x94);data(0x38);
    while(1)
    {     
        I2C0CONCLR = 0x000000ff;
  
        I2C0CONSET=1<<6;
        I2C0CONSET=1<<5;
        while(I2C0STAT!=0x08);
        I2C0CONCLR=0x08;
 
        I2C0DAT=0xA0;
        while(I2C0STAT!=0x18);
        I2C0CONCLR=0x08;
 
        I2C0DAT=(0x00&0xff00)>>8;
        while(I2C0STAT!=0x28);
        I2C0CONCLR=0x08;
 
        I2C0DAT=0x00&0x00ff;
        while(I2C0STAT!=0x28);
        I2C0CONCLR=0x08;
         
        //I2C0CONSET=1<<5;
        //while(I2C0STAT!=0x10);
 
        I2C0DAT=0xA1;
        while(I2C0STAT!=0x18);
        I2C0CONCLR=0x08;
 
        l=I2C0DAT;
        while(I2C0STAT!=0x58);
        I2C0CONCLR=0x08;
        
        I2C0CONSET=1<<4;
 
        cmd(0xc0);
        data(48+((l/10)%10));
        data(48+(l%10));
    }
}





is there any mistake in the above program
 
Last edited by a moderator:

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top