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بسم الله الرحمن الرحيم

الاخوه في منتديات القريه الالكترونيه

السلام عليكم ورحمه الله

سوف اضع الشرح ورسم الدائره والكود لمشروع ربط المايكروكنترولا بجهاز تجديد المواقع

فقط اريد مساعدتكم في عملية المحاكاه باستخدام البروتس
انشاء الله سوف اسلم هذا المشروع لاستاذي بعد غدا"
ارجو من احدكم ان يرسل لي ملف البروتس للدائره ادناه الرابط اسفل:::



شرح عن الدائره
GPS modem is a device which receives signals from satellite and provides information about latitude, longitude, altitude, time etc. The GPS navigator is more famous in mobiles to track the road maps. The GPS modem has an antenna which receives the satellite signals and transfers them to the modem. The modem in turn converts the data into useful information and sends the output in serial RS232 logic level format. The information about latitude, longitude etc is sent continuously and accompanied by an identifier string.
This article shows how to interface the GPS modem with ATmega16 and extract the location (latitude and longitude) from the GPGGA string and display it on LCD.


الكود:::::::::::::::::

// Program to get latitude and longitude value from GPS modem and display it on LCD:
/*
LCD DATA port----PORT A
signal port------PORT B
rs-------PB0
rw-------PB1
en-------PB2
*/

#define F_CPU 12000000UL

#include<avr/io.h>
#include<util/delay.h>

#define USART_BAUDRATE 4800
#define BAUD_PRESCALE (((F_CPU / (USART_BAUDRATE * 16UL))) - 1)


#define LCD_DATA PORTA //LCD data port

#define ctrl PORTB
#define en PB2 //enable signal
#define rw PB1 //read/write signal
#define rs PB0 //resister select signal

void LCD_cmd(unsigned char cmd);
void init_LCD(void);
void LCD_write(unsigned char data);
void LCD_write_string(unsigned char *str);

void usart_init();
unsigned int usart_getch();

unsigned char value,i,lati_value[15],lati_dir, longi_value[15], longi_dir, alti[5] ;

int main(void)
{
DDRA=0xff; //LCD_DATA port as out put port
DDRB=0x07; //ctrl as out put
init_LCD(); //initialization of LCD
_delay_ms(50); // delay of 50 mili seconds
LCD_write_string("we at");
LCD_cmd(0xC0);
usart_init(); // initialization of USART
while(1)
{
value=usart_getch();
if(value=='$')
{
value=usart_getch();
if(value=='G')
{
value=usart_getch();
if(value=='P')
{
value=usart_getch();
if(value=='G')
{
value=usart_getch();
if(value=='G')
{
value=usart_getch();
if(value=='A')
{
value=usart_getch();
if(value==',')
{
value=usart_getch();
while(value!=',')
{
value=usart_getch();
}
lati_value[0]=usart_getch();
value=lati_value[0];
for(i=1;value!=',';i++)
{
lati_value[i]=usart_getch();
value=lati_value[i];
}
lati_dir=usart_getch();
value=usart_getch();
while(value!=',')
{
value=usart_getch();
}
longi_value[0]=usart_getch();
value=longi_value[0];
for(i=1;value!=',';i++)
{
longi_value[i]=usart_getch();
value=longi_value[i];
}
longi_dir=usart_getch();
LCD_cmd(0x01);
_delay_ms(1);
LCD_cmd(0x80);
_delay_ms(1000);
i=0;
while(lati_value[i]!='\0')
{
LCD_write(lati_value[j]);
j++;
}
LCD_write(lati_dir);
LCD_cmd(0xC0);
_delay_ms(1000);
i=0;
while(longi_value[i]!='\0')
{
LCD_write(longi_value[i]);
i++;
}
LCD_write(longi_dir);
_delay_ms(1000);

}
}
}
}
}
}
}
}
}

void init_LCD(void)
{
LCD_cmd(0x38); //initialization of 16X2 LCD in 8bit mode
_delay_ms(1);

LCD_cmd(0x01); //clear LCD
_delay_ms(1);

LCD_cmd(0x0E); //cursor ON
_delay_ms(1);

LCD_cmd(0x80); // ---8 go to first line and --0 is for 0th position
_delay_ms(1);
return;
}


void LCD_cmd(unsigned char cmd)
{
LCD_DATA=cmd;
ctrl =(0<<rs)|(0<<rw)|(1<<en);
_delay_us(40);
ctrl =(0<<rs)|(0<<rw)|(0<<en);
//_delay_ms(50);
return;
}


void LCD_write(unsigned char data)
{
LCD_DATA= data;
ctrl = (1<<rs)|(0<<rw)|(1<<en);
_delay_us(40);
ctrl = (1<<rs)|(0<<rw)|(0<<en);
//_delay_ms(50);
return ;
}


void usart_init()
{

UCSRB |= (1<<RXCIE) | (1 << RXEN) | (1 << TXEN); // Turn on the transmission and reception circuitry
UCSRC |= (1 << URSEL) | (1 << UCSZ0) | (1 << UCSZ1); // Use 8-bit character sizes

UBRRL = BAUD_PRESCALE; // Load lower 8-bits of the baud rate value into the low byte of the UBRR register
UBRRH = (BAUD_PRESCALE >> 8); // Load upper 8-bits of the baud rate value into the high byte of the UBRR register
}


unsigned int usart_getch()
{

while ((UCSRA & (1 << RXC)) == 0); // Do nothing until data have been recieved and is ready to be read from UDR
return(UDR); // return the byte
}

void LCD_write_string(unsigned char *str) //take address vaue of the string in pionter *str
{
int i=0;
while(str[i]!='\0') // loop will go on till the NULL charaters is soon in string
{
LCD_write(str[i]); // sending data on CD byte by byte
i++;
}
return;
}

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