ES ordening

2025-05-27 23:20:05 +02:00
parent d9244f1ae3
commit 39269a71a7
49 changed files with 1952 additions and 0 deletions
--- a/5/Assignment-C/main.cpp
+++ b/5/Assignment-C/main.cpp
@@ -0,0 +1,101 @@
+#include  <Arduino.h>
+
+#define LED0 PORTD5  // D5
+#define LED1 PORTD6  // D6
+#define LED2 PORTB0  // D8
+#define LED3 PORTB1  // D9
+#define BUILTIN_LED PORTB5  // D13
+
+#define BUTTON_SLOW PINB2  // D10
+#define BUTTON_FAST PINB3  // D11
+
+#define COMPARE_MIN 1000
+#define COMPARE_MAX 50000
+
+volatile unsigned char counter = 0;
+volatile unsigned int compareValue = COMPARE_MAX;
+
+void setupIO() {
+  // LEDs output
+  DDRD |= (1 << LED0) | (1 << LED1);
+  DDRB |= (1 << LED2) | (1 << LED3) | (1 << BUILTIN_LED);
+
+  // Buttons input with pull-up
+  DDRB &= ~((1 << BUTTON_SLOW) | (1 << BUTTON_FAST));
+  PORTB |= (1 << BUTTON_SLOW) | (1 << BUTTON_FAST);
+
+  // Pin change interrupt for D10/D11
+  PCICR |= (1 << PCIE0);
+  PCMSK0 |= (1 << PCINT2) | (1 << PCINT3);
+}
+
+// Setup Timer1 with COMPA (counter) and COMPB (1Hz LED)
+void setupTimer1() {
+  TCCR1A = 0;
+  TCCR1B = (1 << WGM12) | (1 << CS11) | (1 << CS10); // CTC, prescaler 64
+
+  OCR1A = compareValue;      // 4-bit counter update speed
+  OCR1B = 249999;            // 1 Hz = (16e6 / 64) / 250000
+  TIMSK1 = (1 << OCIE1A) | (1 << OCIE1B); 
+}
+
+// Show counter value on 4 LEDs
+void updateLEDs(unsigned char val) {
+  if (val & 0x01) PORTD |= (1 << LED0); else PORTD &= ~(1 << LED0);
+  if (val & 0x02) PORTD |= (1 << LED1); else PORTD &= ~(1 << LED1);
+  if (val & 0x04) PORTB |= (1 << LED2); else PORTB &= ~(1 << LED2);
+  if (val & 0x08) PORTB |= (1 << LED3); else PORTB &= ~(1 << LED3);
+}
+
+// Counter interrupt (frequency adjustable)
+ISR(TIMER1_COMPA_vect) {
+  counter = (counter + 1) & 0x0F;
+  updateLEDs(counter);
+}
+
+ISR(TIMER1_COMPB_vect) {
+  PINB |= (1 << BUILTIN_LED); // Toggle built-in LED
+}
+
+// Button interrupt: handle speed control
+ISR(PCINT0_vect) {
+  static unsigned char lastState = 0xFF;
+  unsigned char current = PINB;
+
+  // Falling edge: slow down
+  if (!(current & (1 << BUTTON_SLOW)) && (lastState & (1 << BUTTON_SLOW))) {
+    if (compareValue < COMPARE_MAX) {
+      compareValue <<= 1;
+      if (compareValue > COMPARE_MAX) compareValue = COMPARE_MAX;
+    }
+  }
+
+  // Falling edge: speed up
+  if (!(current & (1 << BUTTON_FAST)) && (lastState & (1 << BUTTON_FAST))) {
+    if (compareValue > COMPARE_MIN) {
+      compareValue >>= 1;
+      if (compareValue < COMPARE_MIN) compareValue = COMPARE_MIN;
+    }
+  }
+
+  lastState = current;
+}
+
+void setup() {
+  cli();
+  setupIO();
+  setupTimer1();
+  sei();
+}
+
+void loop() {
+  static unsigned int lastValue = 0;
+  cli();
+  if (compareValue != lastValue) {
+    TIMSK1 &= ~(1 << OCIE1A);    
+    OCR1A = compareValue;
+    TIMSK1 |= (1 << OCIE1A);
+    lastValue = compareValue;
+}
+sei();
+}