Merge pull request #8 from jetannenbaum/master

[micorpython_ir.git] / ir_rx / samsung.py

diff --git a/ir_rx/samsung.py b/ir_rx/samsung.py
new file mode 100644 (file)
index 0000000..382dcbf
--- /dev/null
+++ b/ir_rx/samsung.py
@@ -0,0 +1,37 @@
+# samsung.py Decoder for IR remote control using synchronous code\r
+# Supports Samsung TV remote protocols.\r
+\r
+# Author: J.E. Tannenbaum\r
+# Copyright J.E.Tannenbaum 2021 Released under the MIT license\r
+\r
+from utime import ticks_us, ticks_diff\r
+from ir_rx import IR_RX\r
+\r
+class SAMSUNG(IR_RX):\r
+    def __init__(self, pin, callback, *args):\r
+        super().__init__(pin, 68, 80, callback, *args)\r
+\r
+    def decode(self, _):\r
+        def near(v, target):\r
+            return target * 0.8 < v < target * 1.2\r
+\r
+        lb = self.edge - 1  # Possible length of burst\r
+        burst = []\r
+        for x in range(lb):\r
+            dt = ticks_diff(self._times[x + 1], self._times[x])\r
+            if x > 0 and dt > 10000:  # Reached gap between repeats\r
+                break\r
+            burst.append(dt)\r
+\r
+        lb = len(burst)  # Actual length\r
+        cmd = 0\r
+        if near(burst[0], 4500) and near(burst[1], 4500) and lb == 67:\r
+            # Skip the starting bits and the checksum at the end of the sequence\r
+            for x in range(2, lb - 1, 2):\r
+                cmd *= 2\r
+                # Test for logical 1 (One byte low, next byte high)\r
+                if burst[x] < 1000 and burst[x + 1] > 1000:\r
+                    cmd += 1\r
+\r
+        # Set up for new data burst and run user callback\r
+        self.do_callback(cmd, 0, 0)\r