Mikrokontrollersystemer-gruppe-4/mikrokontrollersystemer-prosjekt
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RTC init and timer

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Inamr 2024-03-20 12:33:03 +01:00
parent df3d0c6ce6
commit 88415ddec1
2 changed files with 82 additions and 37 deletions
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23
prosjekt.X/fan speeeed.h
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@ -14,17 +14,18 @@
extern "C" { extern "C" {
#endif #endif
#include <stdbool.h> #include <stdbool.h>
#include <float.h> #include <float.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <stdint.h> #include <stdint.h>
#include <math.h> #include <math.h>
#include <avr/interrupt.h> #include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/cpufunc.h>
int fan_speed(float value); int RTC_init();
int fan_speed(float voltage_value);
inline void fan_speed_toggle();
#ifdef __cplusplus #ifdef __cplusplus
} }

94
prosjekt.X/fan speeeeeeeed.c
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@ -1,32 +1,76 @@
#include "fan speeeed.h" #include "fan speeeed.h"
RTC.PITCTRLA = RTC_PERIOD_CYC32768_gc | RTC_PITEN_bm;
int fan_speed(float voltage_value){ int RTC_init() {
init_millis() uint8_t temp;
sei(); /* Initialize 32.768kHz Oscillator: */
float fan_speed; /* Disable oscillator: */
float t = 0; temp = CLKCTRL.XOSC32KCTRLA;
float past_time = 0; temp &= ~CLKCTRL_ENABLE_bm;
float start_time = 0; /* Writing to protected register */
ccp_write_io((void*) &CLKCTRL.XOSC32KCTRLA, temp);
while (CLKCTRL.MCLKSTATUS & CLKCTRL_XOSC32KS_bm) {
; /* Wait until XOSC32KS becomes 0 */
}
/* SEL = 0 (Use External Crystal): */
temp = CLKCTRL.XOSC32KCTRLA;
temp &= ~CLKCTRL_SEL_bm;
/* Writing to protected register */
ccp_write_io((void*) &CLKCTRL.XOSC32KCTRLA, temp);
/* Enable oscillator: */
temp = CLKCTRL.XOSC32KCTRLA;
temp |= CLKCTRL_ENABLE_bm;
/* Writing to protected register */
ccp_write_io((void*) &CLKCTRL.XOSC32KCTRLA, temp);
/* Initialize RTC: */
while (RTC.STATUS > 0) {
; /* Wait for all register to be synchronized */
}
/* 32.768kHz External Crystal Oscillator (XOSC32K) */
RTC.CLKSEL = RTC_CLKSEL_TOSC32K_gc;
/* Run in debug: enabled */
RTC.DBGCTRL = RTC_DBGRUN_bm;
RTC.PITINTCTRL = RTC_PI_bm; /* Periodic Interrupt: enabled */
RTC.PITCTRLA = RTC_PERIOD_CYC32768_gc /* RTC Clock Cycles 32768 */
| RTC_PITEN_bm; /* Enable: enabled */
}
int fan_speed(float voltage_value) {
int counter = 0;
int old_value = 0; int old_value = 0;
int f;
if (voltage_value > 300 && old_value < 300){ if (voltage_value > 300 && old_value < 300) {
start_time = init_millis() counter++;
t =(start_time - past_time);
past_time = start_time;
} }
voltage_value = old_value; voltage_value = old_value;
f = ((1/t)*1000); return old_value;
fan_speed = (f*60)/2; }
return fan_speed;
} inline void fan_speed_toggle() {
float fan_speed;
ISR(PORTB_PORT_vect) float t = 0;
{ f = ((1 / t)*1000);
static int counter = 0; fan_speed = (f * 60) / 2;
if (counter >=5){ return fan_speed;
PORTB.OUT ^= 0x0F; }
counter = 0;
} ISR(RTC_PIT_vect) {
PORTB.INFLAFS = PIN2_bm; RTC.PITINTFLAGS = RTC_PI_bm;
fan_speed_toggle();
}
int main(void) {
fan_speed();
RTC_init();
sei();
while (1) {
}
} }