X-Git-Url: https://git.realraum.at/?a=blobdiff_plain;f=rf433rcv%2Frf433rcv.cpp;fp=rf433rcv%2Frf433rcv.cpp;h=3e05fec7aa60d41283bf935cac3f10ca12b6f450;hb=3dd363874cc677b1403c7c86bb582707821b61cc;hp=0000000000000000000000000000000000000000;hpb=52738a9c3bc2b9bbd0729d8ba1dcb1b970681e67;p=svn42.git

diff --git a/rf433rcv/rf433rcv.cpp b/rf433rcv/rf433rcv.cpp
new file mode 100644
index 0000000..3e05fec
--- /dev/null
+++ b/rf433rcv/rf433rcv.cpp
@@ -0,0 +1,209 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <inttypes.h>
+#define RF433_PIN 0
+//********************************************************************//
+
+typedef unsigned char byte;
+
+typedef struct {
+  byte offset;
+  byte state;
+} rf_bit_t;
+
+// offset is number of alphas (0.08ms)
+
+const rf_bit_t zero_bit[] = { {  4, 1 },
+                              { 16, 0 },
+                              { 20, 1 },
+                              { 32, 0 },
+                              {  0, 0 } };
+
+const rf_bit_t one_bit[] = { { 12, 1 },
+                             { 16, 0 },
+                             { 28, 1 },
+                             { 32, 0 },
+                             {  0, 0 } };
+
+const rf_bit_t float_bit[] = { {  4, 1 },
+                               { 16, 0 },
+                               { 28, 1 },
+                               { 32, 0 },
+                               {  0, 0 } };
+
+const rf_bit_t sync_bit[] = { {   4, 1 },
+                              { 128, 0 },
+                              {   0, 0 } };
+
+typedef enum { ZERO = 0, ONE , FLOAT , SYNC } adbit_t;
+typedef byte ad_bit_t;
+#define WORD_LEN 13
+typedef ad_bit_t word_t[WORD_LEN];
+
+const rf_bit_t* bit_defs[] = { zero_bit, one_bit, float_bit, sync_bit };
+
+byte alpha_cnt = 0;
+byte bit_cnt = 0;
+byte chunk_cnt = 0;
+byte word_cnt = 0;
+const ad_bit_t* current_word;
+byte volatile frame_finished = 1;
+
+#define FRAME_LEN 8
+
+#define A1_ON  0
+#define A1_OFF 1
+#define A2_ON  2
+#define A2_OFF 3
+
+#define B1_ON  4
+#define B1_OFF 5
+#define B2_ON  6
+#define B2_OFF 7
+
+#define C1_ON  8
+#define C1_OFF 9
+#define C2_ON  10
+#define C2_OFF 11
+
+#define D1_ON  12
+#define D1_OFF 13
+#define D2_ON  14
+#define D2_OFF 15
+
+const word_t words[]  = { 
+{ ZERO,  ZERO,  FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // A1_ON
+{ ZERO,  ZERO,  FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // A1_OFF
+{ ZERO,  ZERO,  FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // A2_ON
+{ ZERO,  ZERO,  FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // A2_OFF
+
+{ FLOAT, ZERO,  FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // B1_ON
+{ FLOAT, ZERO,  FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // B1_OFF
+{ FLOAT, ZERO,  FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // B2_ON
+{ FLOAT, ZERO,  FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // B2_OFF
+
+{ ZERO,  FLOAT, FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // C1_ON
+{ ZERO,  FLOAT, FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // C1_OFF
+{ ZERO,  FLOAT, FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // C2_ON
+{ ZERO,  FLOAT, FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // C2_OFF
+
+{ FLOAT, FLOAT, FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // D1_ON
+{ FLOAT, FLOAT, FLOAT, FLOAT, ZERO,  ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }, // D1_OFF
+{ FLOAT, FLOAT, FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, FLOAT, SYNC }, // D2_ON
+{ FLOAT, FLOAT, FLOAT, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO, FLOAT, FLOAT, ZERO,  SYNC }  // D2_OFF
+};
+
+
+//********************************************************************//
+
+void start_timer()
+{
+  // timer 1: 2 ms
+  TCCR1A = 0;                    // prescaler 1:8, WGM = 4 (CTC)
+  TCCR1B = 1<<WGM12 | 1<<CS11;   // 
+  OCR1A = 159;        // (1+159)*8 = 1280 -> 0.08ms @ 16 MHz -> 1*alpha
+//  OCR1A = 207;        // (1+207)*8 = 1664 -> 0.104ms @ 16 MHz -> 1*alpha
+  TCNT1 = 0;          // reseting timer
+  TIMSK1 = 1<<OCIE1A; // enable Interrupt
+}
+
+void stop_timer() // stop the timer
+{
+  // timer1
+  TCCR1B = 0; // no clock source
+  TIMSK1 = 0; // disable timer interrupt
+}
+
+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)
+{
+  byte sample = digitalRead(RF433_PIN);
+  if (last_sample!=sample && sample==HIGH)
+  {
+    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};
+//bool wait_millis(unsigned long *start_time, unsigned long ms)
+//{
+//  if (ms == 0)
+//    return false;
+//  else if (*start_time > 0)
+//  {
+//    if (millis() < *start_time || millis() > (*start_time) + ms)
+//    {
+//      *start_time = 0;
+//      return false;
+//    }
+//    else
+//      return true;
+//  }
+//  else
+//  {
+//    *start_time=millis();
+//    return true;
+//  }
+//}
+
+//********************************************************************//
+
+void setup()
+{
+  pinMode(RF433_PIN, INPUT);      // set pin to input
+  digitalWrite(RF433_PIN, LOW);  // turn of pullup resistors 
+
+  Serial.begin(57600);
+//  Serial.println("starting timer");
+  start_timer();
+}
+
+
+void loop()
+{
+}
+
+int main(void)
+{
+  init();
+
+  setup();
+
+  for (;;)
+    loop();
+
+  return 0;
+}
+