nerdegutta
- Joined Dec 15, 2009
- 2,684
Good tip. Thanks.
PIC18f with GPS to the LCD, small issue--need help
- Thread starter chillcat
- Start date
I will send SMS, I have the basic code written, my PIC seems to cycle through the sending routine 3 times and stops, based on my oscilloscope. I can't figure that one out yet, I want it to continually send every 15 secs (for now). Attached is my new code.
Code:
// GPS function using PIC18f4520....Team Unicorn
#define _XTAL_FREQ 8000000 // subject to change
#include <stdint.h> // width values
#include <stdio.h>
#include <stdlib.h>
#include <xc.h>
#include <string.h> // string readout data
#pragma config BOREN=ON,LVP=OFF,CPD=OFF,OSC=INTIO7,WDT=OFF
void GPS_DATA(void);
void LCDinit(), LCDcmd(int unicorn), LCDstring(char *unicorn), LCDdata(int unicorn); // LCD stuff
void Delay_Ms(unsigned int delay);
void UART_Write(char data),UART_Write_Text(char *text);
void UART_Read_Text(char *Output, unsigned int length),uart_init(void);
// void UTC_to_EST(void);
char UART_Read(),UART_Data_Ready(),UART_TX_Empty();
char UART_Init(const long int baudrate);
unsigned char LATITUDE[9],LAT_Dir[1],LONGITUDE[10],LON_Dir[1],buffer[7],gps_header[]="GPGGA,"; // for GPS string array
unsigned char TIME[6];
char UART_TX_Empty(){
return TRMT;}
void UART_Read_Text(char *Output, unsigned int length){
int i;
for(int i=0; i<length; i++)
Output[i] = UART_Read();}
void UART_Write(char data){
while(!TRMT);
TXREG = data;}
void UART_Write_Text(char *text){
int i;
for(i=0; text[i]!='\0'; i++)
UART_Write(text[i]);}
void send_sms(){
UART_Write_Text("AT+CMGF=1\r\n");
__delay_ms(10); // sets SMS mode to text
UART_Write_Text("AT+CMGS=");
__delay_ms(10);
UART_Write_Text("\"");
__delay_ms(10);
UART_Write_Text("+013526010100");
__delay_ms(10);
UART_Write_Text("\"\r\n");
__delay_ms(10);
UART_Write_Text("LAT=");
__delay_ms(10);
UART_Write_Text(LATITUDE,LAT_Dir);
__delay_ms(10);
UART_Write_Text("LON=");
__delay_ms(10);
UART_Write_Text(LONGITUDE,LON_Dir);
__delay_ms(10);
UART_Write(0x1A);
__delay_ms(50);
}
void GPS_DATA(void){ // $GPRMC,[194530][.000,A,][3051.8007],[N],[10035.9989],[W],1.49,111.67,310714,,,A*74
// HOME: 29.0152284,-82.5726796
int i;
// i = 0;
char Temp = 0;
Temp = UART_Read();
if(Temp == '$'){
for(i=0; i<6; i++){
Temp = UART_Read();
buffer[i] = Temp;} // puts $GPGGA, into buffer
if(strcmp(buffer, gps_header) == 0){ // compare buffer data with header title "GPGGA", STARTS AT THAT STRING!
// UTC TIME (character count)
for(i=0; i<6; i++){
Temp = UART_Read();
TIME[i] = Temp; }
// garbage (.000,A,)
for(i=0; i<5; i++){
Temp = UART_Read();}
// LATITUDE (character count)
for(i=0; i<9; i++){
Temp = UART_Read();
LATITUDE[i] = Temp;}
// garbage (,)
for(i=0; i<1; i++){Temp = UART_Read();}
// NORTH
for(i=0; i<1; i++){
Temp = UART_Read();
LAT_Dir[i] = Temp;}
// garbage (,)
for(i=0; i<1; i++){Temp = UART_Read();}
// LONGITUDE (character count)
for(i=0; i<10; i++){
Temp = UART_Read();
LONGITUDE[i] = Temp;}
// garbage (,)
for(i=0; i<1; i++){Temp = UART_Read();}
// WEST
for(i=0; i<1; i++){
Temp = UART_Read();
LON_Dir[i] = Temp;}
// UTC TIME (LCD display)
LCDcmd(0x80),LCDstring("TIME: ");
LCDdata(TIME[0]),LCDdata(TIME[1]),LCDstring(":");
LCDdata(TIME[2]),LCDdata(TIME[3]),LCDstring(":");
LCDdata(TIME[4]),LCDdata(TIME[5]),LCDstring(" ");
// LATITUDE (LCD display)
LCDcmd(0xC0),LCDstring("LAT: ");
LCDdata(LATITUDE[0]),LCDdata(LATITUDE[1]),LCDstring("°"),LCDdata(LATITUDE[2]);
LCDdata(LATITUDE[3]),LCDdata(LATITUDE[4]),LCDdata(LATITUDE[5]);
LCDdata(LATITUDE[6]),LCDdata(LATITUDE[7]),LCDdata(LATITUDE[8]);
LCDstring(" "),LCDdata(LAT_Dir[0]);
// LONGITUDE (LCD display)
LCDcmd(0x94),LCDstring("LON: ");
LCDdata(LONGITUDE[0]),LCDdata(LONGITUDE[1]),LCDdata(LONGITUDE[2]),LCDstring("°");
LCDdata(LONGITUDE[3]),LCDdata(LONGITUDE[4]),LCDdata(LONGITUDE[5]);
LCDdata(LONGITUDE[6]),LCDdata(LONGITUDE[7]),LCDdata(LONGITUDE[8]);
LCDdata(LONGITUDE[9]),LCDstring(" "),LCDdata(LON_Dir[0]);
// HORSE STATUS (LCD display) <--------------- Interrupt will take over elsewhere from this point!!!
LCDcmd(0xD4),LCDstring("Status: Healthy ");
}
}
}
int main(void){
OSCCON = 0x76; // Sets internal oscillator to 8MHz
TRISA = 0b11111110; // LED: for Interrupt warnings. breakaway, horse health
// TRISB = 0b11110111; // Interupt: B3 (breakaway out), B4 (breakaway in), PIC2 input on port B also!!!
TRISD = 0b01100000; // LCD: E-D7,RS-D4, Data-3:0
TRISC = 0b11111111; // GPS(RC7)
Delay_Ms(10);
LCDinit();
Delay_Ms(10);
LCDcmd(0x80),LCDstring(" TEAM UNICORN "),LCDcmd(0xC0),LCDstring("My Horse is Amazing");
LCDcmd(0x94),LCDstring(""),LCDcmd(0xD4),LCDstring("Searching Satellites");
// Delay_Ms(100);
UART_Init(9600);
Delay_Ms(10);
PORTAbits.RA0 = 0;
while(1){
GPS_DATA();
Delay_Ms(500);
send_sms();
Delay_Ms(50);
// PORTAbits.RA0 = 1;
Delay_Ms(1000);
// LATITUDE[9]=0,LAT_Dir[1]=0,LONGITUDE[10]=0,LON_Dir[1]=0,buffer[7]=0;
// Delay_Ms(100);
}
}
char UART_Init(const long int baudrate){
unsigned int x;
x = (_XTAL_FREQ - baudrate*64)/(baudrate*64);
SPBRG = x;
SYNC = 0, SPEN = 1;
TRISC7 = 1, TRISC6 = 1;
CREN = 1, TXEN = 1;
return 1;
// return 0;
}
char UART_Read(){
while(RCIF == 0); // wait until receive completes
return RCREG;}Ok with the gps fixed, now the output TX is giving me an issue. So upon reprogramming or restarting chip I get 3 data sends occurring on the osillosope within 5 secs of each other. I set the delay time after SEND_SMS function low so it's outputing to gsm every 5 secs or so, I see the data pulse 3 times in row then stops. I don't have any limitation that I know of so I'm not sure why it stops, I should see it continually send every 5 secs. Does the PIC have a limitation that if the gsm doesn't respond then it quits sending data ? Currently have no gsm connected as I'm still shopping for one. Just scoping it for now
Code:
// GPS function using PIC18f4520....Team Unicorn
#define _XTAL_FREQ 8000000 // subject to change
#include <stdint.h> // width values
#include <stdio.h>
#include <stdlib.h>
#include <xc.h>
#include <string.h> // string readout data
#pragma config BOREN=ON,LVP=OFF,CPD=OFF,OSC=INTIO7,WDT=OFF
void GPS_DATA(void);
void LCDinit(), LCDcmd(int unicorn), LCDstring(char *unicorn), LCDdata(int unicorn); // LCD stuff
void Delay_Ms(unsigned int delay);
void UART_Write(char data),UART_Write_Text(char *text);
void UART_Read_Text(char *Output, unsigned int length),uart_init(void);
// void UTC_to_EST(void);
char UART_Read(),UART_Data_Ready(),UART_TX_Empty();
char UART_Init(const long int baudrate);
unsigned char LATITUDE[9],LAT_Dir[1],LONGITUDE[10],LON_Dir[1],buffer[7],gps_header[]="GPGGA,"; // for GPS string array
unsigned char TIME[6];
char UART_TX_Empty(){
return TRMT;}
void UART_Read_Text(char *Output, unsigned int length){
int i;
for(int i=0; i<length; i++)
Output[i] = UART_Read();}
void UART_Write(char data){
while(!TRMT);
TXREG = data;}
void UART_Write_Text(char *text){
int i;
for(i=0; text[i]!='\0'; i++)
UART_Write(text[i]);}
void send_sms(){
UART_Write_Text("AT+CMGF=1\r\n"), __delay_ms(10); // sets SMS mode to text
UART_Write_Text("AT+CMGS="), __delay_ms(10);
UART_Write_Text("\""), __delay_ms(10);
UART_Write_Text("+013526010100"), __delay_ms(10);
UART_Write_Text("\"\r\n"), __delay_ms(10);
UART_Write_Text("LAT="), __delay_ms(10);
UART_Write_Text(LATITUDE), __delay_ms(10);
UART_Write_Text("LON="), __delay_ms(10);
UART_Write_Text(LONGITUDE), __delay_ms(10);
UART_Write(0x1A), __delay_ms(50);
}
void GPS_DATA(void){ // $GPRMC,[194530][.000,A,][3051.8007],[N],[10035.9989],[W],1.49,111.67,310714,,,A*74
int i;
// i = 0;
char Temp = 0;
Temp = UART_Read();
if(Temp == '$'){
for(i=0; i<6; i++){
Temp = UART_Read();
buffer[i] = Temp;} // puts $GPGGA, into buffer
if(strcmp(buffer, gps_header) == 0){ // compare buffer data with header title "GPGGA", STARTS AT THAT STRING!
// UTC TIME (character count)
for(i=0; i<6; i++){
Temp = UART_Read();
TIME[i] = Temp; }
// garbage (.000,A,)
for(i=0; i<5; i++){
Temp = UART_Read();}
// LATITUDE (character count)
for(i=0; i<9; i++){
Temp = UART_Read();
LATITUDE[i] = Temp;}
// garbage (,)
for(i=0; i<1; i++){Temp = UART_Read();}
// NORTH
for(i=0; i<1; i++){
Temp = UART_Read();
LAT_Dir[i] = Temp;}
// garbage (,)
for(i=0; i<1; i++){Temp = UART_Read();}
// LONGITUDE (character count)
for(i=0; i<10; i++){
Temp = UART_Read();
LONGITUDE[i] = Temp;}
// garbage (,)
for(i=0; i<1; i++){Temp = UART_Read();}
// WEST
for(i=0; i<1; i++){
Temp = UART_Read();
LON_Dir[i] = Temp;}
// UTC TIME (LCD display)
LCDcmd(0x80),LCDstring("TIME: ");
LCDdata(TIME[0]),LCDdata(TIME[1]),LCDstring(":");
LCDdata(TIME[2]),LCDdata(TIME[3]),LCDstring(":");
LCDdata(TIME[4]),LCDdata(TIME[5]),LCDstring(" ");
// LATITUDE (LCD display)
LCDcmd(0xC0),LCDstring("LAT: ");
LCDdata(LATITUDE[0]),LCDdata(LATITUDE[1]),LCDstring("°"),LCDdata(LATITUDE[2]);
LCDdata(LATITUDE[3]),LCDdata(LATITUDE[4]),LCDdata(LATITUDE[5]);
LCDdata(LATITUDE[6]),LCDdata(LATITUDE[7]),LCDdata(LATITUDE[8]);
LCDstring(" "),LCDdata(LAT_Dir[0]);
// LONGITUDE (LCD display)
LCDcmd(0x94),LCDstring("LON: ");
LCDdata(LONGITUDE[0]),LCDdata(LONGITUDE[1]),LCDdata(LONGITUDE[2]),LCDstring("°");
LCDdata(LONGITUDE[3]),LCDdata(LONGITUDE[4]),LCDdata(LONGITUDE[5]);
LCDdata(LONGITUDE[6]),LCDdata(LONGITUDE[7]),LCDdata(LONGITUDE[8]);
LCDdata(LONGITUDE[9]),LCDstring(" "),LCDdata(LON_Dir[0]);
// HORSE STATUS (LCD display) <--------------- Interrupt will take over elsewhere from this point!!!
LCDcmd(0xD4),LCDstring("Status: Healthy ");
}
}
}
int main(void){
// OSCCON = 0x76; // Sets internal oscillator to 8MHz
TRISA = 0b11111110; // LED: for Interrupt warnings. breakaway, horse health
// TRISB = 0b11110111; // Interupt: B3 (breakaway out), B4 (breakaway in), PIC2 input on port B also!!!
TRISD = 0b01100000; // LCD: E-D7,RS-D4, Data-3:0
TRISC = 0b11111111; // GPS(RC7)
Delay_Ms(10);
LCDinit();
Delay_Ms(10);
LCDcmd(0x80),LCDstring(" TEAM UNICORN "),LCDcmd(0xC0),LCDstring("My Horse is Amazing");
LCDcmd(0x94),LCDstring(""),LCDcmd(0xD4),LCDstring("Searching Satellites");
// Delay_Ms(100);
UART_Init(9600);
Delay_Ms(10);
PORTAbits.RA0 = 0;
while(1){
PORTAbits.RA0 = 0;
GPS_DATA();
PORTAbits.RA0 = 1;
Delay_Ms(250);
send_sms();
// Delay_Ms(50);
Delay_Ms(1000);
PORTAbits.RA0 = 1;
Delay_Ms(500);
// LATITUDE[9]=0,LAT_Dir[1]=0,LONGITUDE[10]=0,LON_Dir[1]=0,buffer[7]=0;
// Delay_Ms(100);
}
// return;
}
char UART_Init(const long int baudrate){
unsigned int x;
x = (_XTAL_FREQ - baudrate*64)/(baudrate*64);
SPBRG = x;
SYNC = 0, SPEN = 1;
TRISC7 = 1, TRISC6 = 1;
CREN = 1, TXEN = 1;
return 1;
// return 0;
}
char UART_Read(){
while(RCIF == 0); // wait until receive completes
return RCREG;}
void LCDinit(){
LCDcmd(0x33); // 4b Mode
LCDcmd(0x32); // E
LCDcmd(0x2C); // 2-L mode
LCDcmd(0x0C); // Disp On,Curs Off,Blink On
LCDcmd(0x01);} // clear
void LCDcmd(int unicorn){ // LCD CMD 4-BIT, E(bit7),RS(bit4)
PORTD = 0; // E=0 RS=0
int temp = unicorn;
_delay(2000);
unicorn = ((unicorn >> 4) & 0x0F)|0x80; // E=1 RS=0, writes UPPER NIB to LCD: S.R. 4 bits, clears upper bits, bitmask
PORTD = unicorn, _delay(2000);
unicorn = unicorn & 0x0F; // E=0, preserve lower (lower nib is to be sent)
PORTD = unicorn, _delay(2000);
PORTD = 0; // E=0 RS=0
unicorn = temp;
unicorn = (unicorn & 0x0F)|0x80; // E=1 RS=0, writes LOWER NIB to LCD: clears upper bits, bitmask
PORTD = unicorn, _delay(2000);
unicorn = unicorn & 0x0F; // E=0, preserve lower (lower nib is to be sent)
PORTD = unicorn, _delay(2000);}
void LCDdata(int unicorn){ // LCD CMD 4-BIT, E(bit7),RS(bit4)
PORTD = 0; // E=0 RS=0
int temp = unicorn;
_delay(1000);
unicorn = ((unicorn >> 4) & 0x0F)|0x90; // E=1 RS=1, writes UPPER NIB to LCD: S.R. 4 bits, clears upper bits, bitmask
PORTD = unicorn, _delay(1000);
unicorn = (unicorn & 0x0F)|0x10; // E=0 RS=1, preserve lower (lower nib is to be sent)
PORTD = unicorn, _delay(1000);
PORTD = 0; // E=0 RS=0
unicorn = temp;
unicorn = (unicorn & 0x0F)|0x90; // E=1 RS=1, writes LOWER NIB to LCD: clears upper bits, bitmask
PORTD = unicorn, _delay(1000);
unicorn = (unicorn & 0x0F)|0x10; // E=0 RS=1, preserve lower (lower nib is to be sent)
PORTD = unicorn, _delay(1000);}
void LCDstring(char *unicorn){
int I = 0;
int temp;
int count = strlen(unicorn); // count = the length of the string john
while(I < count){ // While loop to determine the length of data for LCD string
temp = unicorn[I++]; // temp = part2LCD increment for the null value places
LCDdata(temp);}}
void Delay_Ms(unsigned int delay){
unsigned int i,j;
for(i=0; i<delay; i++)
for(j=0; j<1000; j++);}
Last edited:
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