البرنامج :
كود:
unsigned short current_duty, old_duty; // Define variables
// current_duty and old_duty
void initMain() {
ANSEL = 0; // All I/O pins are configured as digital
ANSELH = 0;
PORTA = 255; // Port A initial state
TRISA = 255; // All port A pins are configured as inputs
PORTB = 0; // Initial state of port B
TRISB = 0; // All port B pins are configured as outputs
PORTC = 0; // Port C initial state
TRISC = 0; // All port C pins are configured as outputs
PWM1_Init(5000); // PWM module initialization (5KHz)
}
void main() {
initMain();
current_duty = 16; // Initial value of variable current_duty
old_duty = 0; // Reset variable old_duty
PWM1_Start(); // Start PWM1 module
while (1) { // Endless loop
if (Button(&PORTA, 0,1,1)) // If the button connected to RA0 is pressed
current_duty++ ; // increment variable current_duty
if (Button(&PORTA, 1,1,1)) // If the pressed button is connected to RA1
current_duty-- ; // decrement value current_duty
if (old_duty != current_duty) { // If current_duty and old_duty are not
PWM1_Set_Duty(current_duty); // equal set PWM to a new value,
old_duty = current_duty; // save the new value
PORTB = old_duty; // and show it on port B
}
Delay_ms(200); // 200mS delay
}
}
