98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
#include "fan_speeeed.h"
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#include "uart.h"
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uint16_t timer_period_ms = 1;
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uint16_t fan_speed;
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volatile uint16_t falling_edge_counter = 0;
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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_update_period_ms();
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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_ms)/1024); /* F_CPU * F_IRQ / TCA_prescaler */
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}
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uint16_t RPM_calculation() {
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fan_speed = (falling_edge_counter/timer_period_ms)*6000*3;
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falling_edge_counter= 0;
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printf("%u", fan_speed);
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return fan_speed;
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}
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void PORT_init(){
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//compare or capture
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TCB3.CCMP = 0x00;
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//count
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TCB3.CNT = 0x00;
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//PORTD.PIN2CTRL = PORT_ISC_FALLING_gc | 0b01000000;
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// TCB3.CTRLB =0<< TCB_ASYNC_bp /* Asynchronous Enable: disabled */|0<< TCB_CCMPEN_bp /* Pin Output Enable: disabled */|0<< TCB_CCMPINIT_bp /* Pin Initial State: disabled */| TCB_CNTMODE_FRQ_gc;/* Input Capture Frequency measurement */
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// TCB3.EVCTRL =1<< TCB_CAPTEI_bp /* Event Input Enable: enabled */|0<< TCB_EDGE_bp /* Event Edge: disabled */|0<< TCB_FILTER_bp;/* Input Capture Noise Cancellation Filter: disabled */
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// TCB3.INTCTRL =1<< TCB_CAPT_bp /* Capture or Timeout: enabled */|0<< TCB_OVF_bp;/* OverFlow Interrupt: disabled */
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// TCB3.CTRLA = TCB_CLKSEL_DIV1_gc /* CLK_PER */|1<< TCB_ENABLE_bp /* Enable: enabled */|0<< TCB_RUNSTDBY_bp /* Run Standby: disabled */|0<< TCB_SYNCUPD_bp /* Synchronize Update: disabled */|0<< TCB_CASCADE_bp;/* Cascade Two Timer/Counters: disabled */
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//ASYNC disabled; CCMPINIT disabled; CCMPEN disabled; CNTMODE FRQPW;
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TCB3.CTRLB = 0x15;
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//DBGRUN disabled;
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TCB3.DBGCTRL = 0x00;
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//FILTER disabled; EDGE disabled; CAPTEI enabled;
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TCB3.EVCTRL = 0x01;
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//OVF disabled; CAPT enabled;
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TCB3.INTCTRL = 0x03;
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//OVF disabled; CAPT disabled;
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TCB3.INTFLAGS = 0x00;
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//Temporary Value
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TCB3.TEMP = 0x00;
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//RUNSTDBY disabled; CASCADE disabled; SYNCUPD disabled; CLKSEL DIV1; ENABLE enabled;
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TCB3.CTRLA = 0x01;
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EVSYS.CHANNEL0 = 0x48 + 0x05;
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EVSYS.SWEVENTA = 0x01;
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EVSYS.USERTCB3CAPT = 0x01;
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}
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/*
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ISR ( TCA0_OVF_vect ) {
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cli();
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RPM_calculation();
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TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm ;
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sei();
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}*/
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ISR (TCB3_INT_vect){
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uint16_t yo = TCB3.CNT;
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printf("CNT %u", yo);
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uint16_t stewui = TCB3.CCMP;
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printf("CCMP %u", stewui);
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TCB3.INTFLAGS = 0x03;
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//TCB3.INTFLAGS = PIN0_bm;
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}
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/*
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ISR(PORTD_PORT_vect){
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// cli();
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falling_edge_counter ++;
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PORTD.INTFLAGS = PIN2_bm;
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//sei();
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}
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* */
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