another movement done

semestralka1/src/hardware/uart.cpp

@@ -0,0 +1,51 @@
+// src/hardware/uart.cpp
+#include "uart.h"
+#include <cstring>
+
+UartReader::UartReader(BufferedSerial &serial, DigitalOut &led_pin)
+    : serial_port(serial), led(led_pin) {
+  memset(rx_buffer, 0, sizeof(rx_buffer));
+  memset(message, 0, sizeof(message));
+}
+
+UartEvent UartReader::poll() {
+  bool changed = false;
+  bool triggered = false;
+
+  // cita spravu z uartu
+  if (serial_port.readable()) {
+    memset(rx_buffer, 0, sizeof(rx_buffer));
+    ssize_t num = serial_port.read(rx_buffer, sizeof(rx_buffer) - 1);
+    if (num > 0) {
+      led = !led; // toogle ledky
+      strncpy(message, rx_buffer, sizeof(message) - 1);
+      message_active = true;
+      changed = true;
+      triggered = true;
+    }
+  }
+
+  // casovac na 1s zobrazenia spravy
+  if (!timer_started) {
+    msg_timer.start();
+    timer_started = true;
+  }
+
+  // po jednu sekundu sa sprava zobrazi
+  if (message_active && msg_timer.elapsed_time() > MESSAGE_DISPLAY_DURATION) {
+    message_active = false;
+    memset(message, 0, sizeof(message));
+    msg_timer.reset();
+    changed = true;
+  }
+
+  if (triggered)
+    return UartEvent::Triggered;
+  if (changed)
+    return UartEvent::MessageUpdate;
+  return UartEvent::NoChange;
+}
+
+const char* UartReader::get_message() const {
+  return message_active ? message : nullptr;
+}