最初コミット

2026-03-01 17:41:24 +09:00
commit 01705ab778
2 changed files with 228 additions and 0 deletions
--- a/play.ino
+++ b/play.ino
@@ -0,0 +1,12 @@
+void play(byte pin, unsigned int frequency, byte duty, unsigned long duration) {
+  unsigned long period = 1000000UL / frequency;
+  unsigned long high = period * duty / 100UL;
+  unsigned long low = period - high;
+
+  for (unsigned long i = 0; i < duration * 1000UL; i += period) {
+    digitalWrite(pin, HIGH);
+    delayMicroseconds(high);
+    digitalWrite(pin, LOW);
+    delayMicroseconds(low);
+  }
+}