From e9a9d3c9904b451ee5ed230700688714998c2546 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Thu, 17 Nov 2011 02:10:12 +0100
Subject: initial version

---
 onkyo_ri.pde | 143 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 onkyo_ri.pde

(limited to 'onkyo_ri.pde')

diff --git a/onkyo_ri.pde b/onkyo_ri.pde
new file mode 100644
index 0000000..89adcfc
--- /dev/null
+++ b/onkyo_ri.pde
@@ -0,0 +1,143 @@
+/*
+
+RI Codes:
+
+TAPE = 42157
+DVD = 31612
+CD = 71327
+PORT = 81993
+CDR = 71322
+MD = 71808
+
+*/
+
+#include "signals.h"
+
+// Digital pin #2 is the same as Pin D2 see
+// http://arduino.cc/en/Hacking/PinMapping168 for the 'raw' pin mapping
+#define IRpin_PIN      PINB
+#define IRpin          0
+
+#define ARRAY_LEN(array)    (sizeof(array)/sizeof(array[0]))
+
+#define MAXPULSE 500
+#define RESOLUTION 20
+#define FUZZINESS 20
+
+int header[] = {300, 100};
+int values[2][2] = { {100, 100}, {100, 200} };
+int trail[] = { 100 };
+uint8_t bits = 12;
+
+uint8_t raw[2];
+
+uint64_t listenForIR(void);
+int getPulseLength();
+int getPulseLengthInRange(int expected);
+
+void setup(void) {
+        Serial.begin(9600);
+        Serial.println("Ready to decode IR!");
+        pinMode(13, OUTPUT);
+}
+
+void loop(void) {
+        uint64_t code = listenForIR();
+        Serial.println(code, HEX);
+}
+
+int getPulseLength() {
+        bool high = IRpin_PIN & (1 << IRpin);
+        bool check = true;
+        int length = 0;
+
+        while (check) {
+                length++;
+                delayMicroseconds(RESOLUTION);
+
+                if (length >= MAXPULSE) {
+                        return -1;
+                }
+
+                check = IRpin_PIN & (1 << IRpin);
+                if (! high) {
+                        check = ! check;
+                }
+        }
+
+        return length * RESOLUTION / 10;
+}
+
+bool inRange(int value, int expected) {
+        return (abs(value - expected) <= FUZZINESS);
+}
+
+int getPulseLengthInRange(int expected) {
+        int length = getPulseLength();
+
+        if (!inRange(length, expected)) {
+                length = 0;
+        }
+
+        return length;
+}
+
+uint64_t listenForIR(void) {
+        int length;
+        uint64_t code;
+        uint8_t i;
+
+start:
+        code = 0;
+
+        for (i = 0; i < ARRAY_LEN(header); i++) {
+                length = getPulseLengthInRange(header[i]);
+
+                if ((length == 0) || (length < 0))
+                        goto start;
+        }
+
+        for (uint8_t j = 0; j < bits; j++) {
+                for (i = 0; i < ARRAY_LEN(raw); i++) {
+                        raw[i] = getPulseLength();
+
+                        if ((raw[i] == 0) || (raw[i] < 0))
+                                goto start;
+                }
+
+                bool found;
+
+                for (uint8_t k = 0; k < ARRAY_LEN(values); k++) {
+                        found = true;
+
+                        for (i = 0; i < ARRAY_LEN(raw); i++) {
+                                if (!inRange(raw[i], values[k][i])) {
+                                        found = false;
+                                        break;
+                                }
+                        }
+
+                        if (found) {
+                                code <<= 1;
+                                code += k;
+
+                                break;
+                        }
+                }
+
+                if (!found) {
+                        Serial.println(raw[0]);
+                        Serial.println(raw[1]);
+                        goto start;
+                }
+        }
+
+        for (i = 0; i < ARRAY_LEN(trail); i++) {
+                length = getPulseLengthInRange(trail[i]);
+
+                if ((length == 0) || (length < 0))
+                        goto start;
+        }
+
+        return code;
+}
-- 
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