36 lines
770 B
C
36 lines
770 B
C
#include "fan_speeeed.h"
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void TCA0_init() {
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TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm ;
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TCA0.SINGLE.CTRLA = TCA_SINGLE_ENABLE_bm | TCA_SINGLE_CLKSEL_DIV1024_gc ; /* Sysclk /1024 */
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TCA0.SINGLE.PERBUF = 0x0F42;
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}
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void TCA0_update_period_ms() {
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TCA0.SINGLE.PERBUF = (F_CPU*(1/timer_period)/1024); /* F_CPU * F_IRQ / TCA_prescaler */
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}
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int read_input_get_RPM() {
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fan_speed=(voltage_value_counter/timer_period)*6000*3;
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voltage_value_counter = 0;
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return fan_speed;
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}
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void PORT_init(){
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PORTB.PIN2CTRL = PORT_ISC_FALLING_gc;
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}
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ISR ( TCA0_OVF_vect ) {
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read_input_get_RPM();
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TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm ;
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}
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ISR(PORTB_PORT_vect){
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PORTB.INTFLAGS = PIN2_bm;
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voltage_value_counter ++;
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}
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