Fixed fanspeed

prosjekt.X/fan_speeeed.c

@@ -8,57 +8,62 @@ uint16_t fan_speed;
 volatile uint16_t falling_edge_counter = 0;
 #define MAX_PER 0x50
 
+
 void init_TCA0() {
     
     //code 
-    PORTMUX.TCAROUTEA = PORTMUX_TCA0_PORTD_gc; 
+   // PORTMUX.TCAROUTEA = PORTMUX_TCA0_PORTD_gc; 
     // port d ??? why 
-    PORTD.DIR = PIN0_bm; 
+    //PORTD.DIR = PIN0_bm; 
     //code 
     //TCA0.SINGLE.PERBUF = MAX_PER; 
-    TCA0.SINGLE.PERBUF = (F_CPU * (1 / timer_period_ms) / 1024); /* F_CPU * F_IRQ / TCA_prescaler */
+    //TCA0.SINGLE.PERBUF = (F_CPU * (1 / timer_period_ms) / 1024); /* F_CPU * F_IRQ / TCA_prescaler */
-    TCA0.SINGLE.CMP0BUF = MAX_PER/2;
+    //TCA0.SINGLE.CMP0BUF = MAX_PER/2;
-    TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | 0x03;
+    //TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | 0x03;
-    TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;
+    //TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;
     
     //TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm;
     //TCA0.SINGLE.CTRLA = TCA_SINGLE_ENABLE_bm | TCA_SINGLE_CLKSEL_DIV1024_gc; /* Sysclk /1024 */
     //TCA0_update_period_ms();
+    TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm ;
+    TCA0.SINGLE.CTRLA = TCA_SINGLE_ENABLE_bm | TCA_SINGLE_CLKSEL_DIV1024_gc ; /* Sysclk /1024 */
+    TCA0.SINGLE.PERBUF = 3906;
+    //TCA0_update_period_ms();
 }
 
 void TCA0_update_period_ms() {
     TCA0.SINGLE.PERBUF = (F_CPU * (1 / timer_period_ms) / 1024); /* F_CPU * F_IRQ / TCA_prescaler */
 }
 
-uint16_t RPM_calculation(uint16_t test, uint16_t time) {
+uint16_t RPM_calculation(uint16_t time) {
-    fan_speed = (test / time)*6000 * 3;
+    printf("time: %u", time);
+    fan_speed = (falling_edge_counter / time);
+    fan_speed = fan_speed/2; 
+    fan_speed = fan_speed * 60/5;
+    printf("falling edge: %u", falling_edge_counter);
     falling_edge_counter = 0;
-    printf("%u", fan_speed);
+    printf("falling edge: ", falling_edge_counter);
+    printf("fanspeed %u \n", fan_speed);
     return fan_speed;
 }
 
 
-
-
 void PORTB_init() {
     PORTA.OUTSET |= PIN5_bm;
     PORTA.DIRSET |= PIN5_bm;
 }
-// Voltage reference
-#define VDACREF 
-#define VREF 
-#define DACREF_VALUE (VDACREF * 256 / VREF)
-
 
 void init_ac0(){
     // CONFIGURE PINS AS ANALOG INPUTS
-    PORTD.DIRSET &= PIN6_bm;
+    PORTD.DIRSET &= ~PIN6_bm;
     PORTD.PIN6CTRL &= ~ PORT_ISC_gm;
     PORTD.PIN6CTRL = PORT_ISC_INPUT_DISABLE_gc;
     
+    PORTD.DIRSET &= ~PIN7_bm;
     PORTD.PIN7CTRL &= ~ PORT_ISC_gm ;
     PORTD.PIN7CTRL = PORT_ISC_INPUT_DISABLE_gc;
     
+    PORTD.DIRSET &= PIN3_bm;
     PORTD.PIN3CTRL &= ~ PORT_ISC_gm ;
     PORTD.PIN3CTRL = PORT_ISC_INPUT_DISABLE_gc;
     
@@ -68,28 +73,35 @@ void init_ac0(){
     //SELECT POSITIVE AND NEGATIVE INPUTS FOR COMPARRISON
     // FAN USE PD6 & PD7, COMPARE WITH PD3
     AC0.MUXCTRL = AC_MUXPOS_AINP3_gc | AC_MUXNEG_AINN0_gc;
-  //AC_MUXPOS_AINP1_gc
+    //AC_MUXPOS_AINP1_gc
     
     // OPTIONAL: ENABLE INNPUT PIN BY WRITING "1" TO OUTEN
     //AC0.CTRLA = 0x40; // 0b01000000
     // ENABLE AC BY WRITING 1 TO ENABLE BIT IN ACN.CTRLA
-    AC0.CTRLA |= PIN0_bm; // 0b00000001
+    //AC0.CTRLA |= PIN0_bm; // 0b00000001
-    //AC0.CTRLA = AC_ENABLE_bm | AC_INTMODE_NORMAL_POSEDGE_gc | AC_OUTEN_bm;
+    AC0.CTRLA = AC_ENABLE_bm | AC_INTMODE_NORMAL_POSEDGE_gc | AC_OUTEN_bm;
     
-    // SET CMP TO 1
+    // TURN ON INTERUPT
     AC0.INTCTRL = 0x01; 
 }
 
-void test(){
-    printf("yo");
-}
 
 ISR(AC0_AC_vect){ // AC0 vec flag 
+    cli();
+    falling_edge_counter++;
     AC0.STATUS |= 0x10; //CMP flag to 0.
     //printf("yo");
-    test();
+    sei();
 }
 
+ISR (TCA0_OVF_vect) {
+    cli();
+    RPM_calculation(1);
+    TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm ;
+    sei();
+}
+
+
 //-----------------------------------------------------------------------------------------------------
 //-------------------------------------- S E T U P-----------------------------------------------------
 

prosjekt.X/fan_speeeed.h

@@ -26,7 +26,7 @@ extern "C" {
     
     void init_TCA0();    
     void TCA0_update_period_ms ();
-    uint16_t RPM_calculation(uint16_t test, uint16_t time);
+    uint16_t RPM_calculation(uint16_t time);
     void init_ac0();
     
 #ifdef	__cplusplus

prosjekt.X/main.c

@@ -35,6 +35,7 @@ int main(void) {
 
     init_uart((uint16_t)9600);
     stdout = &USART_stream;
+    init_TCA0();
     init_ac0();
     sei();