Hi.
I have had similar problems with this project and identical errors when compiling.
I have made a couple of changes to the code to get it to compile but I am still struggling to get the project to work.
Some of the changes are:
1) where there is “RCSTA.SPEN=1” for instance I have needed to change this to “RCSTAbits.SPEN=1” this needs to be done wherever there is a register.port command
2) needed to include the correct “.h” file otherwise commands which use LATA and PORTA etc give errors
3) Also there is no “Delay_ms” function even though it is referred to in the code – not sure if maybe other versions of the compiler has this as a standard function. I have just made my own delay function
4) The checking of the Port D input pins makes no sense to me and it gives an error. So I have changed them – see the code below.
Like I said I’m still battling to get this project working and I am by no means an expert in these matters – but maybe the author can respond to some of these suggested changes.
Code below. Cheers.
#include <p18f4550.h>
#include <timers.h>
//Program to interface GSM Modem with PIC18F4550 Microcontroller
//This code takes four choices as four inputs
//Choice 1 : Test the simple AT Command.
//Choice 2 : Find out the IMEI number of the GSM Modem.
//Choice 3 : Connect a call to a GSM mobile number.
//Choice 4 : Send a text message to a mobile number.
#define FREQ 12000000
#define baud 9600
#define spbrg_value (((FREQ/64)/baud)-1)
// #define rs LATA.F0
// #define rw LATA.F1
// #define en LATA.F2
//LCD Control pins
#define rs PORTBbits.RB4
#define rw PORTBbits.RB3
#define en PORTBbits.RB2
#define lcdport LATB
void tx_data(unsigned char);
unsigned char rx_data();
void lcd_ini(void);
void lcdcmd(unsigned char);
void lcddata(unsigned char);
void gsm_cmd(unsigned char *);
void output(void);
void Delay_ms ( int delay );
unsigned char value=0;
int i=0,j,k,temp,flag,choice;
unsigned char *starting_text=”Enter choice=”;
unsigned char *dial_text=”Dialing…”;
unsigned char *at_cmd=”AT”;
unsigned char *imei_cmd=”AT+GSN”;
unsigned char *call_cmd=”ATD9xxxxxxxxx;”; // Provide a 10-Digit Mobile Number
unsigned char *sms_format=”AT+CMGF=1″;
unsigned char *sms_write=”AT+CMGS=”xxxxxxxxxx””; // 10-Digit Mobile Number
unsigned char *sms=”Hello”;
unsigned char *sms_report=”SMS Sent…”;
unsigned char sms_terminate=0x1A;
unsigned char enter=0x0D;
unsigned char *data;
void main()
{
TRISB=0; // Set Port B as output port
LATB=0;
TRISA=0;
LATA=0;
TRISD=0xFF;
LATD=0;
SPBRG=spbrg_value; // Fill SPBRG register to set the baud rate
RCSTAbits.SPEN=1; // To activate serial port (Tx and Rx pins)
TXSTAbits.TXEN=1; // Activate Transmissiom
RCSTAbits.CREN=1; // Activate Reception
PIE1bits.RCIE=1; // Enable Reception interrupt
INTCONbits.GIE=1; // Enable Global interrupt
INTCONbits.PEIE=1; // Enable Peripheral interrupt
lcd_ini();
while(1)
{
k=0;
lcdcmd(0x80);
while(starting_text[k]!=’ ’)
{
lcddata(starting_text[k]);
k++;
}
//Check inputs
//Choice 1
if(PORTD=0xfe)
{
gsm_cmd(at_cmd);
output();
Delay_ms(1000);
}
//Choice 2
if(PORTD=0xfd)
{
gsm_cmd(imei_cmd);
output();
Delay_ms(1000);
}
//Choice 3
if(PORTD=0xfb)
{
gsm_cmd(call_cmd);
output();
Delay_ms(1000);
}
//Choice 4
if(PORTD=0xf7)
{
gsm_cmd(sms_format);
output();
Delay_ms(1000);
gsm_cmd(sms_write);
output();
Delay_ms(1000);
gsm_cmd(sms);
output();
tx_data(0x1A);
Delay_ms(1000);
}
}
}
void gsm_cmd(unsigned char *string)
{
i=0;j=0;
while(string!=’ ’)
{
temp=0;
if(string==0x5C) // Not to send ” cahracter
i++;
tx_data(string); // Send by serial communication
i++;
while(temp!=1);
}
temp=0;
tx_data(enter); // Send ASCII code for ‘Enter’ key
while(temp!=1);
}
void output(void) // To print data on LCD
{
lcdcmd(0x01);
i=-1;flag=0;
while(i<j)
{
if(flag>1)
{
flag=0;
Delay_ms(500);
lcdcmd(0x01);
lcdcmd(0x80);
}
if(data==0x0A) // This condition is to avoid double Enter
// during execution of a command
{
flag++;
lcdcmd(0xc0);
}
if(data==’>’||data=='”‘) // Not to print this character
{
i++;
lcdcmd(0xc0);
}
if(data!=0x0D&&data!=0x0A&&data!=0x1A) // Condition to print the data
// except ‘Enter’,’New line’ and ‘Submit’
{
lcddata(data);
i++;
}
else
i++;
Delay_ms(300);
}
lcdcmd(0x01);
}
void tx_data(unsigned char serial_data) // Transmit data function
{
TXREG=serial_data;
while(PIR1bits.TXIF==0);
}
void interrupt()
{
data[j]=RCREG; // Store the data into array when Reception interrupt occurs
value=RCREG;
j++;
temp=1;
}
void lcd_ini(void)
{
lcdcmd(0x38); // Configure the LCD in 8-bit mode, 2 line and 5×7 font
lcdcmd(0x0C); // Display On and Cursor Off
lcdcmd(0x01); // Clear display screen
lcdcmd(0x06); // Increment cursor
lcdcmd(0x80); // Set cursor position to 1st line, 1st column
}
void lcdcmd(unsigned char cmdout)
{
lcdport=cmdout; //Send command to lcdport=PORTB
rs=0;
rw=0;
en=1;
Delay_ms(10);
en=0;
}
void lcddata(unsigned char dataout)
{
lcdport=dataout; //Send data to lcdport=PORTB
rs=1;
rw=0;
en=1;
Delay_ms(10);
en=0;
}
void Delay_ms ( int delay )
{
int ms, x;
for ( ms = 0; ms< delay; ms ++ )
for ( x = 0; x < 70; x ++ );
}