From 32eb657a83c04b4a7499c590936da752e5b8c15e Mon Sep 17 00:00:00 2001
From: simimeie <simimeie>
Date: Wed, 30 Jun 2010 19:38:28 +0000
Subject: [PATCH] now also supporting "repeat" codes for selected keys.

---
 ircontrol.c | 33 +++++++++++++++++++++++++++++----
 ircontrol.h |  5 ++++-
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/ircontrol.c b/ircontrol.c
index e0e5317..4a8e46f 100644
--- a/ircontrol.c
+++ b/ircontrol.c
@@ -1,4 +1,4 @@
-/* $Id: ircontrol.c,v 1.4 2010/06/27 23:05:55 simimeie Exp $
+/* $Id: ircontrol.c,v 1.5 2010/06/30 19:38:28 simimeie Exp $
  * Functions for the infrared receiver
  *
  * The infrared receiver is connected to PB0 / PCINT0.
@@ -24,10 +24,13 @@
 
 /* For NEC, we start with a 9000 us pulse, then 4500 us silence.
  * Then the bits follow:
- * a 1 is a 560 us pulse followed by 1690 us of silence.
- * a 0 is a 560 us pulse followed by  560 us of silence.
+ * a 1 is a 560 us pulse followed by 1690 us of silence (=2250 us total).
+ * a 0 is a 560 us pulse followed by  560 us of silence (=1120 us total).
  * These values equal the following cpu cycle counts:
  *  9000 us = 72000 cc, 4500 us = 36000 cc, 560 us = 4480, 1690 us = 13520 cc
+ * When the key stays pressed, it is not resubmitted, but instead a special
+ * "repeat" code is sent. That is: 9000 us pulse, 2250 us silence, 560 us
+ * pulse.
  */
 #define NECSTARTLEN1 ((CPUFREQ *   9UL) / 1000UL)
 #define NECSTARTLEN2 ((CPUFREQ *  45UL) / 10000UL)
@@ -44,9 +47,14 @@
 
 static struct timestamp last0irqts;
 static struct timestamp last1irqts;
-static uint8_t lastpin = 0;
+static uint8_t lastpin = 0xff;
 static uint8_t codebytes[4];
 static uint8_t curcodebit = 0xff;
+static uint8_t lastcommand = 0xff;
+static uint8_t repeatcommand = 0xff;
+static uint16_t repeatticks = 0;
+/* Repeat after this many ticks (70 = 0.5s) */
+#define REPEATAFTERTICKS 100
 
 /* some example codes
 root@moodlight# !NSB! 11111111 00001000 11011111 00100000  (r)
@@ -90,6 +98,9 @@ ISR(PCINT0_vect) {
           console_printpgm_P(PSTR("!CRC!"));
         } else {
           /* Successful decode! */
+          lastcommand = codebytes[2];
+          repeatcommand = codebytes[2];
+          repeatticks = curirqts.ticks;
           console_printpgm_P(PSTR(" DEC>"));
           console_printhex8(codebytes[0]);
           console_printhex8(codebytes[1]);
@@ -125,6 +136,12 @@ ISR(PCINT0_vect) {
             && (ts0diff <= ((12 * NECREPEATLEN) / 10))) {
         if (curcodebit == 0xfe) {
           console_printpgm_P(PSTR(".REP."));
+          if ((curirqts.ticks - repeatticks) > REPEATAFTERTICKS) {
+            if ((repeatcommand == 0x00) || (repeatcommand == 0x01)) {
+              /* Only the up/down arrows are allowed to be repeated */
+              lastcommand = repeatcommand;
+            }
+          }
         }
     }
     last1irqts = curirqts;
@@ -173,3 +190,11 @@ void ircontrol_init(void)
   /* Enable pin change interrupt 0 (=PB0) in pcint0 */
   PCMSK0 |= _BV(PCINT0);
 }
+
+uint8_t ircontrol_getlastcommand(void)
+{
+  uint8_t res;
+  res = lastcommand;
+  lastcommand = 0xff;
+  return res;
+}
diff --git a/ircontrol.h b/ircontrol.h
index b1a42ef..f12a9e5 100644
--- a/ircontrol.h
+++ b/ircontrol.h
@@ -1,4 +1,4 @@
-/* $Id: ircontrol.h,v 1.1 2010/06/26 19:08:18 simimeie Exp $
+/* $Id: ircontrol.h,v 1.2 2010/06/30 19:38:28 simimeie Exp $
  * Functions for the infrared receiver
  */
 
@@ -8,4 +8,7 @@
 /* Init infrared receiver (pins) */
 void ircontrol_init(void);
 
+/* Get received code */
+uint8_t ircontrol_getlastcommand(void);
+
 #endif /* _IRCONTROL_H_ */
-- 
2.25.1