Lea/microcontrolling
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

interrupts but real

Browse source
This commit is contained in:
Lea 2023-08-29 18:52:13 +02:00
parent eb9ac17e13
commit 517d589650
Signed by: Lea
GPG key ID: 1BAFFE8347019C42
1 changed files with 7 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
main.c
View file

@ -10,19 +10,20 @@
#include "lib/7segment.h" #include "lib/7segment.h"
#include "lib/7segment_4digits.h" #include "lib/7segment_4digits.h"
volatile int ticks = 0; int timer_start = 0xffff - (F_CPU / 1024 / 1000);
volatile uint32_t ticks = 0;
// https://gist.github.com/Wollw/2381139 // https://gist.github.com/Wollw/2381139
void start_timer() { void start_timer() {
// Sets the Clock Select. See table on page 157 the Atmel datasheet. // Sets the Clock Select. See table on page 157 the Atmel datasheet.
TCCR1B |= _BV(CS10) | _BV(CS12); TCCR1B |= _BV(CS10) | _BV(CS12); // clk/1024
// Set the TOIE (Timer Overflow Interrupt Enable) bit // Set the TOIE (Timer Overflow Interrupt Enable) bit
// on TIMSK1 (Timer 1 Interrupt Mask Register). // on TIMSK1 (Timer 1 Interrupt Mask Register).
TIMSK1 |= _BV(TOIE1); TIMSK1 |= _BV(TOIE1);
// Sets the current timer value // Sets the current timer value
TCNT1 = 63974; TCNT1 = timer_start;
// Enable interrupts // Enable interrupts
sei(); sei();
@ -36,8 +37,8 @@ void main() {
// ISR is used to handle interrupts. TIMER1_OVF_vect // ISR is used to handle interrupts. TIMER1_OVF_vect
// is triggered whenever timer 1 (16 bit) overflows. // is triggered whenever timer 1 (16 bit) overflows.
ISR(TIMER1_OVF_vect) { ISR(TIMER1_OVF_vect) {
TCNT1 = 63974; // TODO figure out how to get the correct number TCNT1 = timer_start; // TODO figure out how to get the correct number
ticks++; ticks += 1;
} }
void prog_7segment() { void prog_7segment() {
@ -76,7 +77,7 @@ void prog_7segment_4digit() {
bool pressed = false; bool pressed = false;
while(1) { while(1) {
show_float(ticks); show_float(ticks / 1000.0f);
float sleep_time = update_display(); float sleep_time = update_display();
if (!pressed && bit_is_clear(PINK, PINK7)) { if (!pressed && bit_is_clear(PINK, PINK7)) {