GSM 300 Response on LCD wit PIC16F877A

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
#ifndef _SERIAL_H_
#define _SERIAL_H_
 
#define _XTAL_FREQ 4000000L
 
//#ifndef _SERIAL_H_
#define _SERIAL_H_
 
#define BAUD 9600
#define FOSC 4000000L
#define NINE 0 /* Use 9bit communication? FALSE=8bit */
 
#define DIVIDER ((int)(FOSC/(16UL * BAUD) -1))
#define HIGH_SPEED 1
 
#if NINE == 1
#define NINE_BITS 0x40
#else
#define NINE_BITS 0
#endif
 
#if HIGH_SPEED == 1
#define SPEED 0x4
#else
#define SPEED 0
#endif
#define RX_PIN TRISC7
#define TX_PIN TRISC6
 
/* Serial initialization */
#define init_comms()\
RX_PIN = 1; \
TX_PIN = 1; \
SPBRG = DIVIDER; \
RCSTA = (NINE_BITS|0x90); \
TXSTA = (SPEED|NINE_BITS|0x20)
#endif
__CONFIG(XT & WDTDIS & PWRTEN & BORDIS & LVPDIS &
 
main()
{
INTCON = 0xC0;
init_comms();
wait(10);
lcd_init();
wait(10);
clearBuffer();
lcd_clear();
i=0;
Tx_string("AT\r");
while(RCIF){
buffer[i]=RCREG;
i++;
}
buffer[i]= '\0';
 
for(i=0;buffer[i]!='\0';i++)
{
buffer[i]+= 0x30;
lcd_goto(0x00+i);
wait(10);
lcd_putch(buffer[i]);
wait(50);
} while(1);
 
 
void clearBuffer()
{
for(i = 0;i < 95;i++)buffer[i] = ' ';
 
}

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
do {
 
    i = 0;
 
    Tx_string("AT\r");
 
    //while(!RCIF);
 
    while(i < 6) {  // \r\nOK\r\n = 6 characters
        if(RCIF)
            buffer[i++] = RCREG;
 
        RCIF = 0;
                
    }
 
    buffer[i]= '\0';
 
    for(i = 0; buffer[i] != '\0'; i++)
    {
        if((buffer[i] != '\r') || (buffer[i] != '\n')) {
        
            lcd_goto(i);
            wait(10);
            lcd_putch(buffer[i]);
            wait(50);
        }
    }
 
} while(1);