2026-01-20

i2c-schedule.py

@@ -0,0 +1,49 @@
+from time import sleep
+from random import binomialvariate
+
+DISPLAY = "display"
+SENSOR = "sensor"
+ZIGBEE = "zigbee"
+LABELS = {DISPLAY, SENSOR, ZIGBEE}
+
+time = 0
+
+transactions  = []
+active_transaction = None
+slice_labels = {l: "" for l in LABELS}
+
+def display():
+    if time % 5 == 1:
+        transactions.append((DISPLAY, 4 if binomialvariate(p=0.15) else 2, 50))
+
+def sensor():
+    if time % 5 == 0:
+        transactions.append((SENSOR, 1, 10))
+
+def zigbee():
+    if time % 15 == 14:
+        transactions.append((ZIGBEE, 10, 100))
+
+print(' '*5, *(l[0] for l in LABELS))
+while True:
+
+    display()
+    sensor()
+    zigbee()
+
+    if active_transaction is None and transactions:
+        active_transaction = min(transactions, key=lambda t: t[2])
+        transactions.remove(active_transaction)
+
+    print(f"t={time:02}: ", end="")
+    if active_transaction is not None:
+        label, duration, priority = active_transaction
+        print(*('x' if l == label else '#' if any(t[0]==l for t in transactions) else ' ' for l in LABELS))
+
+        active_transaction = (label, duration-1, priority) if duration > 1 else None
+        transactions = [(l, d, p*0.8) for (l, d, p) in transactions]
+    else:
+        print("   ")
+
+    time += 1
+    sleep(1)