How to solve undefined identifier "OPTION_REGbits"?

[Elson Ong]

I used PIC16F877A, software MPLAB IDE v.8.89 and build with compiler v.9.70. with Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 48.1 undefined identifier "OPTION_REGbits". Does anyone can help to enlighten me on this? Thanks a lot ^^


#include "GPRSv1.h"
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>




//configuration
//================================================== ========================
__CONFIG(0x3F32); //configuration for the microcontroller


//global variables
//================================================== ========================
char buffer[96];
char outbuf[80];
char minute_flag = 1;
char seconds = 0;

// Initialization
void init(void)
{
//set I/O input output
TRISB = 0b00000011; //configure PORTB I/O direction
TRISD = 0b00000000; //configure PORTD I/O direction
TRISA = 0b00001111; //configure PORTA I/O direction

//setup ADC
ADRESH = 0; //clear A/D result
ADRESL = 0; //clear A/D result
ADCON1 = 0b11000100; // A/D result right justified,
// configure RA0, RA1 and RA3 as analog inputs

//setup Timer 0
OPTION_REGbits.T0CS = 0; //use internal clock
OPTION_REGbits.PSA = 0; //assign prescaler to timer
OPTION_REGbits.PS = 0b111; //prescaler 1:256
TMR0 = -TIMER_CYCLE; //set to 10ms interrupt

//setup UART
SPBRG=10; //set baud rate as 115200 baud
TXSTAbits.BRGH=1; //baud rate high speed option
TXSTAbits.TXEN=1; //enable transmission
TXSTAbits.TX9 =0; //8-bit transmission
RCSTAbits.RX9 =0; //8-bit reception
RCSTAbits.CREN=1; //enable reception
RCSTAbits.SPEN=1; //enable serial port

//setup interrupt
INTCONbits.GIE = 1; //enable global interrupt
INTCONbits.PEIE = 1; //enable peripheral interrupt
INTCONbits.TMR0IF = 0; //enable timer 0 interrupt
INTCONbits.TMR0IE = 1;
PIR1bits.RCIF = 0; //enable UART interrupt
PIE1bits.RCIE = 1;

//configure lcd
lcd_send_config(0b00000001); //clear display at lcd
lcd_send_config(0b00000010); //lcd return to home
lcd_send_config(0b00000110); //entry mode-cursor increase 1
lcd_send_config(0b00001100); //display on, cursor off and cursor blink off
lcd_send_config(0b00111000); //function set

//display startup message
lcd_clr(); //clear lcd
lcd_send_string(BANNER1); //display Banner 1
lcd_goto(20); //set the lcd cursor to location 20
lcd_send_string(BANNER2); //display Banner 2

//blink LEDs once
LED1 = LED2 = 1; //switch on LEDs
delay(125000); //delay 1 second
LED1 = LED2 = 0; //switch off LEDs
}


// Entry point
void main(void)
{
init();
LED1 = 1; LED2 = 0;

if (!gsm_ping()) {
lcd_clr();
lcd_send_string("No GSM Device");
delay(7500000); // delay 1 minute, then reset to try again.
reset();
}

#ifdef GSM_SIMPIN
gsm_cpin_write(GSM_SIMPIN);
pause();
#endif
if (!gsm_cpin_read()) {
lcd_clr();
lcd_send_string("SIM card error");
delay(7500000); // delay 1 minute, then reset to try again.
reset();
}

while (!gsm_cgatt_write(1)) {
lcd_clr();
lcd_send_string("No network");
delay(1250000); // delay 10 seconds, then try again.
}
lcd_clr();
lcd_send_string("Network ready");

gsm_cmgf_write(1);
gsm_ciphead_write(1);
gsm_cdnsorip_write(1);
gsm_cipsprt_write(1);

char retry_count = 0;
while (1) {
if (retry_count != 0) {
lcd_clr();
lcd_send_string("Connection error");
lcd_goto(20);
lcd_send_string("Retry in 10 secs");
delay(1250000); // delay 10 seconds
}
if (++retry_count > GSM_MAX_RETRY) {
lcd_clr();
lcd_send_string("Connection error");
lcd_goto(20);
lcd_send_string("Give up retrying");
gsm_cmgs_write(GSM_DEST_NO, STATION_ID ": Network Error. "
"Max retries exceeded. Reply \""
STATION_ID " RESET\" to reset device.");
while (1) {
delay(7500000); // delay 1 minute.
// Wait for SMS, then reset.
char *from = &outbuf[40];
char *message;
char i;
for (i = 1; i <= 30; i++) {
message = gsm_cmgr_write(i, from);
if (message != NULL) {
char match = (strcmp(message, STATION_ID " RESET") == 0)
&& (strcmp(from, GSM_DEST_NO) == 0);
pause();
pause();
gsm_cmgd_write(i);
pause();
if (match) reset();
} else {
pause();
pause();
}
}
}
}

lcd_clr();
lcd_send_string("Connecting...");

gsm_cgact_write(1, 0);
gsm_cipshut_exec();

if (!gsm_cgdcont_write(1, GSM_APN)) continue;
if (!gsm_cgact_write(1, 1)) continue;
if (!gsm_cstt_write(GSM_APN, GSM_USERNAME, GSM_PASSWORD)) continue;
if (!gsm_cdnscfg_write(GSM_DNS_PRI_SERVER, GSM_DNS_SEC_SERVER)) continue;
if (!gsm_ciicr_exec()) continue;
if (gsm_cifsr_exec() == NULL) continue;

char *status = gsm_cipstatus_exec();
if (status == NULL) continue;
if (strncmp(status, "PDP DEACT", 9) == 0) continue;

if (gsm_cdnsgip_write(GSM_SERVER_DOMAIN) == NULL) continue;

lcd_clr();
lcd_send_string("Connected");

while (1) {
if (!minute_flag) {
sprintf(outbuf, "%u seconds", 60 - seconds);
lcd_clr();
lcd_send_string("Next update in");
lcd_goto(20);
lcd_send_string(outbuf);
pause();
continue;
}
minute_flag = 0;

/* ADC sampling and conversion */
unsigned short ch0, ch1, ch3;
ADCON0 = CHANNEL0; // select channel 0
ch0 = (float)read_adc() * (5000.0 / 1024); // convert output to mV
ADCON0 = CHANNEL1; // select channel 1
ch1 = (float)read_adc() * (5000.0 / 1024); // convert output to mV
ADCON0 = CHANNEL3; // select channel 3
ch3 = (float)read_adc() * (5000.0 / 1024); // convert output to mV

if (!gsm_cipstart_write("TCP", GSM_SERVER_DOMAIN, GSM_SERVER_PORT)) {
break;
}
lcd_clr();
lcd_send_string("Sending data...");

gsm_cipsend_exec(0, "");
sprintf(outbuf, "GET /?StationId=%s&Magnitude=%i.%.3i HTTP/1.1",
STATION_ID, ch0 / 1000, ch0 % 1000);
gsm_cipsend_exec(1, outbuf);
gsm_cipsend_exec(2, "Host: " GSM_SERVER_DOMAIN);
gsm_cipsend_exec(3, "Connection: Keep-Alive");
gsm_cipsend_exec(4, "Accept: */*");
gsm_cipsend_exec(5, "Accept-Language: en-us");
gsm_cipsend_exec(6, "");
if (!gsm_cipsend_exec(255, "")) {
break;
}

lcd_clr();
lcd_send_string("Data sent");

delay(3750000); // wait 30 seconds for all data to arrive.
gsm_cipclose_exec();
retry_count = 1; // reset retry count, since we have successfully sent data.
}
}

// Code for testing purpose.
while (1) {
if (SW1 == 0) {
if (gsm_ping()) {
LED1 = 1;
LED2 = 1;
}
delay(125000);
} else if (SW2 == 0) {
char *from = &outbuf[40];
char *message;
char i;
for (i = 1; i <= 30; i++) {
message = gsm_cmgr_write(i, from);
if (message != NULL) {
if ((strcmp(message, STATION_ID " RESET") == 0) &&
(strcmp(from, GSM_DEST_NO) == 0)) {
LED1 = 0; LED2 = 1;
break;
}
} else {
pause();
}
pause();
pause();
}
delay(125000);
}
}
}


// Coarse delay function (125000 unit = 1 second approx.)
void delay(unsigned long delay_unit)
{
while (delay_unit--);
}

void pause()
{
delay(2000);
}

// Pseudo-random number generator. May not be accurate.
char random()
{
return TMR0;
}

// Software reset
void reset()
{
PCLATH = 0x00;
PCL = 0x00;
}

// interrupt service routine
//================================================== ========================
void serial_isr(void)
{
unsigned char c = RCREG;
}

void timer_isr(void)
{
static char counter = 0;
if (++counter == 100) {
LED1 ^= 1;
LED2 ^= 1;
counter = 0;
if (++seconds == 60) {
minute_flag = 1;
seconds = 0;
}
}
}

void interrupt my_isr(void)
{
if ((TMR0IE) && (TMR0IF)) {
timer_isr();
TMR0 = -TIMER_CYCLE;
TMR0IF = 0;
} else if ((RCIE) && (RCIF)) {
serial_isr();
RCIF = 0;
}
}


// GSM Modem Wrapper functions
// Divided into four types: Test, Read, Write, Execute
// Suffix are added to the function names: _test, _read, _write, _exec
// to indicate its command type.
// So a function name is built up of ('gsm_' + AT command + suffix).
//================================================== ========================

// Ping whether device exists. Return 1 if success, 0 if failed.
char gsm_ping()
{
gsm_execute("AT", 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Read SIM Card lock state. Return 1 if ready, 0 if locked or unready.
char gsm_cpin_read()
{
gsm_execute("AT+CPIN?", 1);
return (strncmp(buffer, "+CPIN: READY", 12) == 0);
}

char gsm_cpin_write(unsigned int pin_no)
{
sprintf(outbuf, "AT+CPIN=%u", pin_no);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

//-------- SMS commands --------//
// Delete SMS message. Return 1 if success, 0 if failed.
char gsm_cmgd_write(char index)
{
sprintf(outbuf, "AT+CMGD=%u", index);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Read and return sms format (0 - PDU mode, 1 - text mode, [-1] - unreadable)
char gsm_cmgf_read()
{
gsm_execute("AT+CMGF?", 1);
if (strncmp(buffer, "+CMGF:", 6) == 0) {
return atoi(buffer+7);
} else {
return -1;
}
}

// Write sms format (0 - PDU mode, 1 - text mode). Return 1 if success, 0 if failed.
char gsm_cmgf_write(char format)
{
sprintf(outbuf, "AT+CMGF=%u", format);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// List all stored sms. Filter can be 'all', 'rec unread', 'rec read',
// 'sto unsent', or 'sto sent'.
void gsm_cmgl_write(const char *filter)
{
sprintf(outbuf, "AT+CMGL=\"%.10s\"", filter);
gsm_execute(outbuf, 1);
}

// Read sms refered by index.
char * gsm_cmgr_write(char index, char *from)
{
from[0] = 0;
sprintf(outbuf, "AT+CMGR=%u", index);
gsm_execute(outbuf, 1);
if (strncmp(buffer, "+CMGR:", 6) == 0) {
char *pos = strchr(buffer, '"');
pos = strchr(pos + 1, '"');
pos = strchr(pos + 1, '"');
*(strchr(pos + 1, '"')) = 0;
strcpy(from, pos + 1);
pause();
gsm_execute(outbuf, 1);
gsm_read_more(1);
*(strchr(buffer, '\r')) = 0;
return buffer;
}
return NULL;
}

// Send sms. Return 1 if success, 0 if failed.
char gsm_cmgs_write(const char *hp_number, const char *message)
{
sprintf(outbuf, "AT+CMGS=\"%s\"", hp_number);
RCIE = 0;
gsm_send_command(outbuf);
unsigned char rcv_data = uart_rec();
RCIE = 1;

if (rcv_data == '>') {
sprintf(outbuf, "%s%c", message, 26); // message + 26(Ctrl Z)
gsm_execute(outbuf, 1);
return (strncmp(buffer, "+CMGS:", 6) == 0);
} else {
return 0;
}
}

//-------- GPRS commands --------//
// Read network state (1 - attached, 0 - detached, [-1] - read failed)
char gsm_cgatt_read()
{
gsm_execute("AT+CGATT?", 1);
if (strncmp(buffer, "+CGATT:", 7) == 0) {
return atoi(buffer+8);
} else {
return -1;
}
}

// Set network state. Return 1 if success, 0 if failed.
char gsm_cgatt_write(char state)
{
sprintf(outbuf, "AT+CGATT=%u", state);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Read PDP context settings. Return 1 if success, 0 if failed.
char gsm_cgdcont_read()
{
gsm_execute("AT+CGDCONT?", 1);
return (strncmp(buffer, "+CGDCONT:", 9) == 0) ||
(strncmp(buffer, "OK", 2) == 0);
}

// Write settings to PDP context. Return 1 if success. 0 if failed.
char gsm_cgdcont_write(char cid, const char *apn)
{
sprintf(outbuf, "AT+CGDCONT=%u,\"IP\",\"%s\"", cid, apn);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Read PDP status. (1 - activated, 0 - deactivated, [-1] - read failed)
char gsm_cgact_read(char cid)
{
gsm_execute("AT+CGACT?", 1);
while (strncmp(buffer, "+CGACT:", 7) == 0) {
if (cid == atoi(buffer + 8)) {
char * pos = strchr(buffer + 8, ',');
if (pos != NULL) {
return atoi(pos+1);
} else {
return -1;
}
} else {
gsm_read_more(1);
}
}
return -1;
}

// Set PDP status. Return 1 if success, 0 if failed.
char gsm_cgact_write(char cid, char state)
{
sprintf(outbuf, "AT+CGACT=%u,%u", state, cid);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0) ||
(strncmp(buffer, "NO CARRIER", 10) == 0);
}

// Read and return pdp address. Otherwise, return NULL if failed.
char * gsm_cgpaddr_write(char cid)
{
sprintf(outbuf, "AT+CGPADDR=%u", cid);
gsm_execute(outbuf, 1);
char * pos = strchr(buffer, ',');
if (pos != NULL) {
pos[17] = 0;
return pos + 2;
} else {
return NULL;
}
}

//-------- TCPIP commands --------//
// Start up tcp or udp connection. Return 1 if success, 0 if failed.
char gsm_cipstart_write(const char *mode, const char *address, unsigned int port)
{
sprintf(outbuf, "AT+CIPSTART=\"%s\",\"%s\",\"%u\"", mode, address, port);
gsm_execute(outbuf, 1);
if (strncmp(buffer, "OK", 2) == 0) {
gsm_read_more(2);
char *pos = strchr(buffer, '\n');
if (pos != NULL) {
pos += 1;
return (strncmp(pos, "CONNECT OK", 10) == 0);
}
}
return 0;
}

// Send data through tcp or udp connection.
// When line = 0, send AT+CIPSEND command.
// When 0 < line < 255, send data line.
// When line = 255, send termination character Ctrl+Z(26).
// Return 1 if success, 0 if failed.
char gsm_cipsend_exec(char line, const char *data)
{
if (line == 0) {
gsm_execute("AT+CIPSEND", 0);
return 1;
} else if (line == 255) {
gsm_execute("\x1A", 1);
return (strncmp(buffer, "SEND OK", 7) == 0);
} else {
gsm_execute(data, 0);
return 1;
}
}

// Close tcp or udp connection. Return 1 if success, 0 if failed.
char gsm_cipclose_exec()
{
gsm_execute("AT+CIPCLOSE", 1);
return (strncmp(buffer, "CLOSE OK", 8) == 0);
}

// Deactivate PDP context. Return 1 if success, 0 if failed.
char gsm_cipshut_exec()
{
gsm_execute("AT+CIPSHUT", 1);
return (strncmp(buffer, "SHUT OK", 7) == 0);
}

// Set local port. Return 1 if success, 0 if failed.
char gsm_clport(const char *mode, unsigned int port)
{
sprintf(outbuf, "AT+CLPORT=\"%s\",%u", mode, port);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Start task and set apn, username, password. Return 1 if success, 0 if failed.
char gsm_cstt_write(const char *apn, const char *username, const char *password)
{
sprintf(outbuf, "AT+CSTT=\"%s\",\"%s\",\"%s\"", apn, username, password);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Start task. Return 1 if success, 0 if failed.
char gsm_cstt_exec()
{
gsm_execute("AT+CSTT", 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Bring up wireless connecion. Return 1 if success, 0 if failed.
char gsm_ciicr_exec()
{
gsm_execute("AT+CIICR", 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Read and return local ip address. Otherwise, return NULL if failed.
char * gsm_cifsr_exec()
{
gsm_execute("AT+CIFSR", 1);
if (strncmp(buffer, "ERROR", 5) == 0) {
return NULL;
} else {
*(strchr(buffer, '\r')) = 0;
return buffer;
}
}

// Query current connection status. Otherwise, return NULL if failed.
char * gsm_cipstatus_exec()
{
gsm_execute("AT+CIPSTATUS", 3);
char *pos = strstr(buffer, "STATE: ");
if (pos != NULL) {
pos += 7;
*(strchr(pos, '\r')) = 0;
return pos;
} else {
return NULL;
}
}

// Configure domain name server. Return 1 if success, 0 if failed.
char gsm_cdnscfg_write(const char *pri_dns, const char *sec_dns)
{
sprintf(outbuf, "AT+CDNSCFG=\"%s\",\"%s\"", pri_dns, sec_dns);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Query ip address of given domain name. Otherwise, return NULL if failed.
char * gsm_cdnsgip_write(const char *domain_name)
{
sprintf(outbuf, "AT+CDNSGIP=\"%s\"", domain_name);
gsm_execute(outbuf, 1);
if (strncmp(buffer, "OK", 2) == 0) {
gsm_read_more(2);
char *pos = strchr(buffer, '\n');
if (pos != NULL) {
pos += 1;
*(strchr(pos, '\r')) = 0;
}
return pos;
} else {
return NULL;
}
}

// Select which method to use in AT+CIPSTART (0 - IP address, 1 - domain name)
// Return 1 if success, 0 if failed.
char gsm_cdnsorip_write(char mode)
{
sprintf(outbuf, "AT+CDNSORIP=%u", mode);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Set whether to add IP head when rcv data. Return 1 if success, 0 if failed.
char gsm_ciphead_write(char mode)
{
sprintf(outbuf, "AT+CIPHEAD=%u", mode);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Set prompt of '>' when sending data. Return 1 if success, 0 if failed.
char gsm_cipsprt_write(char mode)
{
sprintf(outbuf, "AT+CIPSPRT=%u", mode);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Configure as a server. Return 1 if success, 0 if failed.
char gsm_cipserver_exec()
{
gsm_execute("AT+CIPSERVER", 1);
if (strncmp(buffer, "OK", 2) == 0) {
gsm_read_more(2);
char *pos = strchr(buffer, '\n');
if (pos != NULL) {
pos += 1;
return (strncmp(pos, "SERVER OK", 9) == 0);
}
}
return 0;
}

// Set CSD or GPRS for connection mode. Return 1 if success, 0 if failed.
char gsm_cipcsgp_write(char mode, const char *apn, const char *username, const char *password)
{
sprintf(outbuf, "AT+CIPCSGP=%u,\"%s\",\"%s\",\"%s\"", mode, apn, username, password);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Choose connection (1 - client, 2 - server). Return 1 if success, 0 if failed.
char gsm_cipccon_write(char connection)
{
sprintf(outbuf, "AT+CIPCCON=%u", connection);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Set whether fix the local port. Return 1 if success, 0 if failed.
char gsm_cipflp_write(char mode)
{
sprintf(outbuf, "AT+CIPFLP=%u", mode);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Save TCPIP application context. Return 1 if success, 0 if failed.
char gsm_cipscont_exec()
{
gsm_execute("AT+CIPSCONT", 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// Select TCPIP application mode (0 - normal, 1 - tcp channel mode).
// Return 1 if success, 0 if failed.
char gsm_cipmode_write(char mode)
{
sprintf(outbuf, "AT+CIPMODE=%u", mode);
gsm_execute(outbuf, 1);
return (strncmp(buffer, "OK", 2) == 0);
}

// send and store result from gsm command
unsigned char gsm_execute(const char *command, unsigned char nlines)
{
unsigned char rcv_len = 0;
RCIE = 0;
gsm_send_command(command);
buffer[0] = 0;
while (nlines--) {
rcv_len += gsm_read_line(buffer + rcv_len);
}
RCIE = 1;
buffer[rcv_len] = 0;
return rcv_len;
}

// read some more lines after gsm_execute.
unsigned char gsm_read_more(unsigned char nlines)
{
unsigned char rcv_len = 0;
RCIE = 0;
buffer[0] = 0;
while (nlines--) {
rcv_len += gsm_read_line(buffer + rcv_len);
}
RCIE = 1;
buffer[rcv_len] = 0;
return rcv_len;
}


// UART helper functions
//================================================== ========================
unsigned char uart_rec(void) //receive uart value
{
unsigned char rec_data;
while(RCIF==0); //wait for data
rec_data = RCREG;
return rec_data; //return the data received
}

void uart_send(unsigned char data)
{
while(TXIF==0); //only send the new data after
TXREG=data; //the previous data finish sent
}


void uart_str(const char *s)
{
while(*s)uart_send(*s++);
}


void gsm_send_command(const char *command)
{
unsigned char rec_data;

while (*command != 0)
{
uart_send(*command++); // Send the AT command.
rec_data = uart_rec(); // Read the echo.
}

// Send <ENTER>.
uart_str("\r\n");

// Read the echo until Line Feed character is received.
do {
rec_data = uart_rec();
} while (rec_data != '\n');
}



unsigned char gsm_read_line(char *buffer)
{
unsigned char rec_data;
unsigned char rec_len = 0;

// Read the data until Line Feed character is received.
do {
rec_data = uart_rec();
*buffer++ = rec_data;
++rec_len;
} while (rec_data != '\n' && rec_len < 80);

// return the length of data received.
return rec_len;
}


// LCD Display functions
//================================================== ========================
void lcd_send_config(unsigned char data) //send lcd configuration
{
rs=0; //set lcd to configuration mode
lcd_data=data; //lcd data port = data
e=1; //pulse e to confirm the data
delay(50);
e=0;
delay(50);
}

void lcd_send_char(unsigned char data) //send lcd character
{
rs=1; //set lcd to display mode
lcd_data=data; //lcd data port = data
e=1; //pulse e to confirm the data
delay(10);
e=0;
delay(10);
}

void lcd_goto(unsigned char data) //set the location of the lcd cursor
{ //if the given value is (0-15) the
if(data<16) //cursor will be at the upper line
{ //if the given value is (20-35) the
lcd_send_config(0x80+data); //cursor will be at the lower line
} //location of the lcd cursor(2X16):
else // -----------------------------------------------------
{ // | |00|01|02|03|04|05|06|07|08|09|10|11|12|13|14|15| |
data=data-20; // | |20|21|22|23|24|25|26|27|28|29|30|31|32|33|34|35| |
lcd_send_config(0xc0+data); // -----------------------------------------------------
}
}

void lcd_clr(void) //clear the lcd
{
lcd_send_config(0x01);
delay(600);
}

void lcd_send_string(const char *s) //send a string to display in the lcd
{
while (s && *s) lcd_send_char (*s++);
}


// ADC helper functions
//================================================== ========================
unsigned short read_adc(void)
{
unsigned short i;
unsigned short result;
unsigned long result_temp=0;
for(i=2000;i>0;i-=1) //looping 2000 times for getting average value
{
ADCON0bits.GO = 1; //ADGO is the bit 2 of the ADCON0 register
while(ADCON0bits.GO==1); //ADC start, ADGO=0 after finish ADC progress
result=ADRESH;
result=result<<8; //shift to left for 8 bit
result=result|ADRESL; //10 bit result from ADC

result_temp+=result;
}
result = result_temp/2000; //getting average value
return result;
}

 

[jayanth.devarayanadurga]

Are you using Hi Tech C Compiler? If yes, you have to include htc.h file. If you get the error even after including the file then view the contents of htc.h file and see how OPTION_REG register bits are used. If it is used like below then use in that way

OPTIONREGbits.T0CS
OPTIONbits.T0CS

Edit: In pic16f877a.h it is used as

OPTION_REG so you have to use OPTION_REGbits.T0CS and similar. Try including htc.h as I said before. If that doesn't work then include pic16f877a.h also.

Also edit your last post and add code tags or syntax tags. Click # button to get code tags and put your code between the tags.

Can you post the code of GPRSv1.h file? Id htc.h included in the GPRSv1.h file?

 

[Elson Ong]

Re: How to solve undefined identifier &amp;quot;OPTION_REGbits&amp;quot;?

*include <#include <htc.h>> => the same error still exist
*include <pic16f877a.h> => Error [141] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.h; 16.23 can't open include file "pic16f877a.h": No such file or directory

- - - Updated - - -

GPRSv1.h file is as shown below:


#ifndef __GPRSV1_H
#define __GPRSV1_H

// include
//==========================================================================
#include <pic.h>
#include <htc.h>
#include <pic16f877a.h>

// define
//==========================================================================
#define rs RB4 //RS pin of the LCD display
#define e RB5 //E pin of the LCD display

#define lcd_data PORTD //LCD 8-bit data PORT

#define CHANNEL0 0b10000001 // AN0 (ADC)
#define CHANNEL1 0b10001001 // AN1
#define CHANNEL3 0b10011001 // AN3

#define SW1 RB0
#define SW2 RB1

#define LED1 RB6
#define LED2 RB7

#define _XTAL_FREQ 20000000 // crystal frequency - 20 MHz
#define ICLK_FREQ 5000000 // instruction clock frequency - 5 MHz
#define PRESCALER 256 // use prescaler 1:256
#define TIMER_CYCLE 195 // set to (195 * prescaler / 5M) = 10ms


// function declaration
//==========================================================================
void init(void);
void main(void);
void delay(unsigned long delay_unit);
void pause();
char random();
void reset();

void serial_isr(void);
void timer_isr(void);
void interrupt my_isr(void);

char gsm_ping();
char gsm_cpin_read();
char gsm_cpin_write(unsigned int pin_no);
char gsm_cmgd_write(char index);
char gsm_cmgf_read();
char gsm_cmgf_write(char format);
void gsm_cmgl_write(const char *filter);
char * gsm_cmgr_write(char index, char *from);
char gsm_cmgs_write(const char *hp_number, const char *message);
char gsm_cgatt_read();
char gsm_cgatt_write(char state);
char gsm_cgdcont_read();
char gsm_cgdcont_write(char cid, const char *apn);
char gsm_cgact_read(char cid);
char gsm_cgact_write(char cid, char state);
char * gsm_cgpaddr_write(char cid);

char gsm_cipstart_write(const char *mode, const char *address, unsigned int port);
char gsm_cipsend_exec(char line, const char *data);
char gsm_cipclose_exec();
char gsm_cipshut_exec();
char gsm_clport(const char *mode, unsigned int port);
char gsm_cstt_write(const char *apn, const char *username, const char *password);
char gsm_cstt_exec();
char gsm_ciicr_exec();
char * gsm_cifsr_exec();
char * gsm_cipstatus_exec();
char gsm_cdnscfg_write(const char *pri_dns, const char *sec_dns);
char * gsm_cdnsgip_write(const char *domain_name);
char gsm_cdnsorip_write(char mode);
char gsm_ciphead_write(char mode);
char gsm_cipsprt_write(char mode);
char gsm_cipserver_exec();
char gsm_cipcsgp_write(char mode, const char *apn, const char *username, const char *password);
char gsm_cipccon_write(char connection);
char gsm_cipflp_write(char mode);
char gsm_cipscont_exec();
char gsm_cipmode_write(char mode);

unsigned char gsm_execute(const char *command, unsigned char nlines);
unsigned char gsm_read_more(unsigned char nlines);

unsigned char uart_rec(void);
void uart_send(unsigned char data);
void uart_str(const char *s);
void gsm_send_command(const char *command);
unsigned char gsm_read_line(char *buffer);

void lcd_send_config(unsigned char data);
void lcd_send_char(unsigned char data);
void lcd_goto(unsigned char data);
void lcd_clr(void);
void lcd_send_string(const char *s);

unsigned short read_adc(void);

#endif

- - - Updated - - -

Actually the full error display is as below:

Clean: Deleting intermediary and output files.
Clean Warning: File "D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.p1" doesn't exist.
Clean: Done.
Build D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1 for device 16F877A
Using driver C:\Program Files\HI-TECH Software\PICC\9.70\bin\picc.exe

Executing: "C:\Program Files\HI-TECH Software\PICC\9.70\bin\picc.exe" --pass1 D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c -q --chip=16F877A -ID:\GPRSv1_1 -P --runtime=default,+clear,+init,-keep,+osccal,-download,-resetbits,-stackcall,-stackwarn,+clib --opt=default,+asm,-debug,-speed,+space,9 --warn=0 -D__DEBUG=1 --double=24 --float=24 --addrqual=ignore -g --asmlist "--errformat=Error [%n] %f; %l.%c %s" "--msgformat=Advisory[%n] %s" "--warnformat=Warning [%n] %f; %l.%c %s"
Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 50.1 undefined identifier "OPTION_REGbits"
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 50.21 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 51.20 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 52.19 struct/union required
Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 57.1 undefined identifier "TXSTAbits"
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 57.15 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 58.15 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 59.15 struct/union required
Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 60.1 undefined identifier "RCSTAbits"
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 60.15 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 61.15 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 62.15 struct/union required
Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 65.1 undefined identifier "INTCONbits"
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 65.16 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 66.17 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 67.19 struct/union required
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 68.19 struct/union required
Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 69.1 undefined identifier "PIR1bits"
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 69.15 struct/union required
Error [192] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 70.1 undefined identifier "PIE1bits"
Error [196] D:\GPRSv1_1\GPRSv1_1\GPRSv1\GPRSv1.c; 70.15 struct/union required
Advisory[1] too many errors (21)

********** Build failed! **********

 

[jayanth.devarayanadurga]

Re: How to solve undefined identifier &amp;quot;OPTION_REGbits&amp;quot;?

Try including the files in .c file instead of .h file. See if you have pic16f877a.h file in include folder. If you don't have download and install the latest version of Hi Tech C PICC to a temp folder and then copy pic16f877a.h file from the new hitecc to your old hitechc include folder.

Edit your posts and post the codes between code tags. Press # button to get the code tags.