49 lines
1.4 KiB
C
49 lines
1.4 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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#define MAX_PER 0x50
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void init_TCA0() {
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//code
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PORTMUX.TCAROUTEA = PORTMUX_TCA0_PORTD_gc;
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// port d ??? why
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PORTD.DIR = PIN0_bm;
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//code
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//TCA0.SINGLE.PERBUF = MAX_PER;
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TCA0.SINGLE.PERBUF = (F_CPU * (1 / timer_period_ms) / 1024); /* F_CPU * F_IRQ / TCA_prescaler */
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TCA0.SINGLE.CMP0BUF = MAX_PER/2;
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TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | 0x03;
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TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;
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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(uint16_t test, uint16_t time) {
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fan_speed = (test / time)*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 PORTB_init() {
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PORTA.OUTSET |= PIN5_bm;
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PORTA.DIRSET |= PIN5_bm;
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}
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//-----------------------------------------------------------------------------------------------------
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//-------------------------------------- S E T U P-----------------------------------------------------
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