From: Othmar Gsenger <otti@realraum.at>
Date: Mon, 28 Mar 2011 23:06:32 +0000 (+0000)
Subject: rf433rcv neerly working version
X-Git-Url: https://git.realraum.at/?p=svn42.git;a=commitdiff_plain;h=c4c34a4239839e73fea31251ccd6dd04f9a80827

rf433rcv neerly working version
---

diff --git a/rf433rcv/rf433rcv.pde b/rf433rcv/rf433rcv.pde
index ac3ac3e..f464499 100644
--- a/rf433rcv/rf433rcv.pde
+++ b/rf433rcv/rf433rcv.pde
@@ -115,20 +115,46 @@ void stop_timer() // stop the timer
   TIMSK1 = 0; // disable timer interrupt
 }
 
-byte rf433_data=0;
-byte rf433_cnt=0;
+union {
+  byte uint8[4];
+  uint32_t uint32;
+} rf433_data;
+byte rf433_hi_cnt=0;
+byte rf433_lo_cnt=0;
+byte last_sample=0;
+int valid=0;
 ISR(TIMER1_COMPA_vect)
 {
-  rf433_data<<=1;
-  if (digitalRead(RF433_PIN) == HIGH)
-    rf433_data |=1;
-  rf433_cnt++;
-  if (rf433_cnt>7)
+  byte sample = digitalRead(RF433_PIN);
+  if (last_sample!=sample && sample==HIGH)
   {
-    Serial.print(rf433_data);
-    rf433_cnt=0;
-    rf433_data=0;
+    if ( rf433_lo_cnt > 2 && rf433_lo_cnt<6 && rf433_hi_cnt>10 && rf433_hi_cnt < 14)
+    {
+      rf433_data.uint32<<=1;
+      rf433_data.uint32|=1;
+      valid++;
+    } else if (rf433_hi_cnt > 2 && rf433_hi_cnt<6 && rf433_lo_cnt>10 && rf433_lo_cnt < 14) {
+      rf433_data.uint32<<=1;
+      valid++;
+    } else if (rf433_hi_cnt > 2 && rf433_hi_cnt<6 && rf433_lo_cnt>120 && rf433_lo_cnt < 128 && valid >=24) {
+      //rf433_data.uint8[3]=0;
+      //Serial.print(rf433_data.uint32);
+      Serial.print(rf433_data.uint8[0],BYTE);
+      Serial.print(rf433_data.uint8[1],BYTE);
+      Serial.print(rf433_data.uint8[2],BYTE);
+      //Serial.print(rf433_data.uint8[3],BYTE);
+    } else {
+      valid=0;
+      rf433_data.uint32=0;
+    }
+    rf433_hi_cnt=0;
+    rf433_lo_cnt=0;
   }
+  if (sample == HIGH)
+    rf433_hi_cnt++;
+  else 
+    rf433_lo_cnt++;
+  last_sample=sample;
 }
 
 //unsigned long wm_start_[3]={0,0,0};