added basic sender features

[svn42.git] / rf433rcv / teensy / example.c

diff --git a/rf433rcv/teensy/example.c b/rf433rcv/teensy/example.c
index 649b207..282e0bc 100644 (file)
--- a/rf433rcv/teensy/example.c
+++ b/rf433rcv/teensy/example.c
@@ -28,17 +28,21 @@
 #include "usb_rawhid.h"
 
 #define CPU_PRESCALE(n)        (CLKPR = 0x80, CLKPR = (n))
-
-volatile uint8_t do_output=0;
-uint8_t read_buffer[64];
-uint8_t write_buffer[64];
+#define RF_SEND_BUFFER_LEN_MAX 128
+volatile uint16_t output_count=0;
+volatile uint8_t active_buffer=0;
+volatile uint16_t send_buffer=0;
+volatile uint8_t capture=0;
+volatile uint8_t rf_send=0; //count of bits in rf_send_buffer that should be sent
+volatile uint8_t rf_send_reload=0; //count of bits in rf_send_buffer that should be sent
+volatile uint8_t rf_send_reload_count=0; // number of repetitions (times rf_send gets reloaded;
+uint8_t read_buffer[64]; // buffer for reading usb signals
+uint8_t write_buffer[2][64]; // buffer for writing usb signals
+uint8_t rf_send_buffer[RF_SEND_BUFFER_LEN_MAX]; // buffer for sending rf433 signals
+uint8_t rf_send_buffer_len=0;
 
 int main(void)
 {
-  int8_t r;
-  uint8_t i;
-  uint16_t val, count=0;
-
   // set for 16 MHz clock
   CPU_PRESCALE(0);
   DDRF|=3;
@@ -47,7 +51,7 @@ int main(void)
   // 200*8 clock cycles, 100us
   TCCR0A = 1<<WGM01;
   TCCR0B = 1<<CS01;
-  OCR0A = 199;
+  OCR0A = 249;
   TCNT0 = 0;
   TIMSK0 = (1<<OCIE0A);
 
@@ -61,10 +65,42 @@ int main(void)
   _delay_ms(1000);
   while (1) {
     // if received data, do something with it
-    r = usb_rawhid_recv(read_buffer, 0);
+    int8_t r = usb_rawhid_recv(read_buffer, 0);
     if (r>0)
-      usb_rawhid_send(read_buffer, 50);
-
+    {
+      if (read_buffer[0]=='b') //begin capture
+        capture=1;
+      else if (read_buffer[0]=='e') //end capture
+        capture=0;
+      else if (read_buffer[0]=='f') //fill send buffer
+      {
+        int8_t byte_rem = r-1;
+        while(byte_rem && rf_send_buffer_len<RF_SEND_BUFFER_LEN_MAX)
+        {
+          rf_send_buffer[rf_send_buffer_len]=read_buffer[r-byte_rem];
+          rf_send_buffer_len++;
+          byte_rem--;
+        }
+      }
+      else if (read_buffer[0]=='c') // clear send buffer
+      {
+        rf_send_buffer_len=0;
+      }
+      else if (read_buffer[0]=='s') //send
+      {
+        capture=0;
+        if (r>2)
+          rf_send_reload=rf_send_buffer_len*8-read_buffer[2]; // substract bit offset
+        else
+          rf_send_reload=rf_send_buffer_len*8;
+        rf_send_reload_count=read_buffer[1];  
+      }
+    }
+    if (send_buffer)
+    {
+      send_buffer=0;
+      usb_rawhid_send(write_buffer[active_buffer?0:1], 45);
+    }
   }
 }
 
@@ -72,8 +108,28 @@ int main(void)
 ISR(TIMER0_COMPA_vect)
 {
   PORTF^=2;
-
+  if (rf_send)
+  {
+    if (rf_send_buffer[rf_send/8] & 0x80)
+    {
+     PORTF|=1;
+    } else {
+     PORTF&=~1;
+    }
+    rf_send_buffer[rf_send/8]<<=1;
+    rf_send--;
+  } else if (rf_send_reload_count) {
+    rf_send=rf_send_reload;
+  } else if (capture) {
+    write_buffer[active_buffer][output_count/8]<<=1;
+    write_buffer[active_buffer][output_count++/8]|=PINB&1;
+    if (output_count>=64*8)
+    {
+      output_count=0;
+      active_buffer=active_buffer?0:1;
+      send_buffer=1;
+    }
+  }
 }
 
 
-