avr microcontroller interfacing with graphical lcd

[bagavathi]

hai friends,

i tried to interface glcd jhd 12864e with avr 8535 microcontroller it display some line but not data.
please give any idea for how to interface even though i took program from engineers garage and modified for avr it is not working i attached code

---

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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
#define F_CPU 1000000UL
 
#include<avr/io.h>
#include<util/delay.h>
#include<string.h>
#include<FONT.H>
#include<FONT2.H>
#include<SMILEY.H>
 
 
#define dport PORTA
#define cntrl PORTC
#define rs  PC0 
#define rw  PC1 
#define en  PC2 
#define cs1 PC3
#define cs2 PC4
 
#define input PIND
 
void init(void);
void cmd(unsigned char cmd);
void data(unsigned char data);
void display_data(unsigned char *x);
 
 
//unsigned int temp=0,i=0,y=0;
//unsigned char a[]="siva  ",b[]="amar  ",c[]="basha ",d[]="welcome";
 
 
 
unsigned char c;
unsigned char z=0;
 
void ctrloff()
{
    /*rs=0;
    rw=0;
    en=0;
    cs1=0;
    cs2=0;*/
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(0<<cs1)|(0<<cs2);
_delay_ms(10);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(0<<cs1)|(0<<cs2);
_delay_ms(10);
 
}
 
             
void displayon()
{ 
    ctrloff();
    dport=0x3f;  
/*  cs1=1;cs2=1;
    rw=0;rs=0;
    en=1;
    _nop_();  
    en=0;*/
 
cntrl=(0<<rs)|(0<<rw)|(1<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
 
}
 
void displayoff()
{
    ctrloff();
    dport=0x3e;
/*  cs1=1;cs2=1;
    rs=0;rw=0;
    en=1;
    _nop_(); 
    en=0;*/
cntrl=(0<<rs)|(0<<rw)|(1<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
 
 
}
 
void setcolumn(unsigned char y)
{
    if(y<64)
    {
        ctrloff();
        c=y;
        dport=0x40|(y&63);    //0x40 represents Column 0
        /*cs1=1;cs2=0;
        rs=0;
        rw=0;
        en=1;
        _nop_();  
        en=0;*/
cntrl=(0<<rs)|(0<<rw)|(1<<en)|(1<<cs1)|(0<<cs2);
_delay_ms(1);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(1<<cs1)|(0<<cs2);
_delay_ms(1);
 
    }
    else
    { 
        c=y;
        dport=0x40|((y-64)&63);   //0x40 represents Column 0
    /*  cs2=1;cs1=0;
        rs=0;
        rw=0;
        en=1;
        _nop_(); 
        en=0;*/
cntrl=(0<<rs)|(0<<rw)|(1<<en)|(0<<cs1)|(1<<cs2);
_delay_ms(1);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(0<<cs1)|(1<<cs2);
_delay_ms(1);
 
  
    }
}
 
void setpage(unsigned char x)
{
    ctrloff();
    dport= 0xb8|x;     //0xb8 represents Page 0
    /*cs1=1;
    cs2=1;
    rs=0;
    rw=0;
    en=1;
    _nop_();
    en=0; */
cntrl=(0<<rs)|(0<<rw)|(1<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
 
}
 
//Function to Scroll Strings
void setstartline(unsigned char z)           
{
    ctrloff();
    dport=0xc0|z;      //0xc0 represents Line 0
/*  cs1=1;
    cs2=1;
    rs=0;
    rw=0;
    en=1;
    _nop_();  
    en=0;         */
cntrl=(0<<rs)|(0<<rw)|(1<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
cntrl=(0<<rs)|(0<<rw)|(0<<en)|(1<<cs1)|(1<<cs2);
_delay_ms(10);
 
} 
 
void lcddata(unsigned char *value,unsigned int limit)
{
    unsigned int i;
    for(i=0;i<limit;i++)
    {
        if(c<64)
        {
            dport=value[i];
        /*  cs1=1;cs2=0;
            rs=1;
            rw=0;
            en=1;
            _nop_(); 
            en=0    ;*/
cntrl=(1<<rs)|(0<<rw)|(1<<en)|(1<<cs1)|(0<<cs2);
_delay_ms(10);
cntrl=(1<<rs)|(0<<rw)|(0<<en)|(1<<cs1)|(0<<cs2);
_delay_ms(10);
 
            c++;
        }
        else
        { 
            setcolumn(c);
            dport=value[i];
            /*cs2=1;cs1=0;
            rs=1;
            rw=0;
            en=1;
            _nop_();  
            en=0    ;*/
cntrl=(1<<rs)|(0<<rw)|(1<<en)|(0<<cs1)|(1<<cs2);
_delay_ms(10);
cntrl=(1<<rs)|(0<<rw)|(0<<en)|(0<<cs1)|(1<<cs2);
_delay_ms(10);
 
            c++;
        }
        if(c>127)
               return;
    }
}
 
void lcdputs1(unsigned char y,unsigned char x,unsigned char *str)
{
    unsigned char i;
    unsigned int a;
    setcolumn(y);
    setpage(x);
    for(i=0;str[i]!=0;i++)
    {
        a=(*(str+i));
        a*=8;
        lcddata(&Character8x8[a],8);
    }
}
 
void lcdputs2(unsigned char y,unsigned char x,unsigned char *str)
{
    unsigned char i;
    unsigned int a;
    setcolumn(y);
    setpage(x);
    for(i=0;str[i]!=0;i++)
    {
        a=(*(str+i)-32);
        a*=5;
        lcddata(&font5x7[a],5);
    }
}
 
//Function to display Image
void picture(unsigned char * val)
{
    unsigned char j;
    setcolumn(0);
    setpage(0);
    for (j=0;j<8;j++)
    {
        setpage(j);
        setcolumn(0);
        lcddata(&val[(j*128)],128);              
    }
}
 
void clrlcd()
{
    unsigned char i,j;
    for (i=0;i < 8;i++)
    {
    setpage(i);
    setcolumn(0);
        for (j= 0 ;j < 128; j++)
        lcddata(&z,1);
    }
}
 
 
unsigned char ar0[]="****************";
unsigned char ar1[]="EngineersGarage";
unsigned char ar2[]="Inspiring Creations";
unsigned char ar3[]="Graphics LCD";
unsigned char ar4[]="128x64";
 
int main(void)
{
DDRA=0xff;
DDRB=0xff;
DDRC=0xff;
 
    unsigned char i;
    
    /*setstartline(0);
    clrlcd();
    picture(&smiley[0][0]); 
    _delay_ms(100);*/
    clrlcd();
    setcolumn(0);
    setpage(0);
    displayon();
    lcdputs1(0,1,ar0);
    lcdputs1(0,2,ar1);
    lcdputs2(0,3,ar2);
    lcdputs2(0,4,ar3);
    lcdputs2(0,5,ar4);
    _delay_ms(10);
    
    for(i=0;i<5;i++)
    {
        displayoff();
        _delay_ms(10);
        displayon();
        
    }
    i=0;
    while(1)
    {
        setstartline(i++);   //Function to Scroll Strings
        _delay_ms(100);
    }
}

---