grds
alex

#include
#define data_adc P1
#define data_lcd P2
#define RS P3_5
#define EN P3_4

//Pendeklarasian Fungsi-Fungsi yang Digunakan
void tunda(unsigned int ms);
void tulis_cmd(unsigned char data_cmd);
void tulis_char(unsigned char data_char);
void Gotoxy(unsigned char baris,unsigned char kolom);
void tulis_str(unsigned char *s);
void tampil_data(unsigned char line,unsigned char colum);
void kon_ascii();

//Pendeklarasian Variabel Secara Umum
unsigned char puluhan,satuan,ratusan,sensor;
int nilai;
void main(void) //Program Utama
{
unsigned short int ppm;
//inisialisasi LCD
data_adc = 0xff; //2
tulis_cmd(0×38); //LCD 2×16 character
tulis_cmd(0×0c); //Display on, cursor off
tulis_cmd(0×01); //hapus layar
tulis_cmd(0×06); //Pergeseran tampilan ke kanan

Gotoxy(1,5);
tulis_str(”KONSENTRASI SO2″);
tunda(5);
Gotoxy(2,9);
tulis_str(”ppm”);

while(1)
{
sensor = data_adc;
ppm = ((sensor*11)-458); //Perhitungan ppm
nilai = ppm;
tampil_data(2,5); //ditampilkan pada bris 2, kolom 4 (0cah)
}
}
//Fungsi yang digunakan
void tunda(unsigned int ms)
{ unsigned int loop;
while (ms–)
{
loop=1000; //tunda 1000 uS
while (loop–){} //Xtall 12 MHz
}
}
void tulis_cmd(unsigned char data_cmd)
{
RS = 0; //Low-kan RS
data_lcd = data_cmd; //kirim perintah ke LCD
EN = 1; //EN high
EN = 0; //EN low
tunda(1); //Tunda 2 ms
}

void tulis_char(unsigned char data_char)
{
RS = 1; //High-kan RS
data_lcd = data_char; //kirim data ke LCD
EN = 1; //EN high
EN = 0; //EN low
tunda(1); //Tunda 2 ms
}

void tulis_str(unsigned char *s)
{
while(*s)
tulis_char(*s++); //Tulis character ke LCD
}

void Gotoxy(unsigned char baris,unsigned char kolom)
{
if(baris==1)
tulis_cmd ((0×80 + kolom)-1);
else
tulis_cmd ((0xc0 + kolom)-1);
}

void tampil_data(unsigned char line,unsigned char colum)
{
kon_ascii();
Gotoxy(line,colum);
tulis_char(ratusan);
tulis_char(puluhan);
tulis_char(satuan);
}

void kon_ascii()
{
satuan = (nilai % 10) + 0×30;
nilai /=10;
puluhan = (nilai % 10) + 0×30;
nilai /=10;
ratusan = (nilai % 10) + 0×30;
}