unsigned long RPM_Value;
// Define LCD module connections.
sbit LCD_RS at RB5_bit;
sbit LCD_EN at RB4_bit;
sbit LCD_D4 at RA0_bit;
sbit LCD_D5 at RA1_bit;
sbit LCD_D6 at RA2_bit;
sbit LCD_D7 at RA3_bit;
sbit LCD_RS_Direction at TRISB5_bit;
sbit LCD_EN_Direction at TRISB4_bit;
sbit LCD_D4_Direction at TRISA0_bit;
sbit LCD_D5_Direction at TRISA1_bit;
sbit LCD_D6_Direction at TRISA2_bit;
sbit LCD_D7_Direction at TRISA3_bit;
// End LCD module connection definition
sbit IR_Tx at RA4_bit;
// Define Messages
char message1[] = "Tachometer";
char *RPM = "00000 RPM";
void Display_RPM(unsigned long num){
RPM[0] = num/10000 + 48;
RPM[1] = (num/1000)%10 + 48;
RPM[2] = (num/100)%10 + 48;
RPM[3] = (num/10)%10 + 48;
RPM[4] = num%10 + 48;
Lcd_Out(2,4,RPM);
}
void main() {
CMCON = 0x07; // Disable comparators
ADCON1 = 0x0F; // Disable Analog functions
TRISC = 0x00;
TRISB = 0x00;
PORTA = 0x00;
TRISA = 0b00010000;
T0CON = 0x08; // TMR0 as 16-bit counter
Lcd_Init(); // Initialize LCD
Lcd_Cmd(_LCD_CLEAR); // CLEAR display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Out(1,4,message1); // Write message1 in 1st row
do {
T0CON.TMR0ON = 1;
TMR0L = 0;
TMR0H = 0;
IR_Tx = 1;
Delay_ms(1000); // Wait for 1 sec
IR_Tx = 0;
T0CON.TMR0ON = 0; // Stop the timer
RPM_Value = (256*TMR0H + TMR0L)*60;
Display_RPM(RPM_Value);
} while(1); // Infinite Loop
}