X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=shellcode%2Fchipcon%2Fcc1110%2Freflexframe.c;h=57aa2ab049599c0bc1a9b53edc6c8a9194f9cbdf;hp=1081c8d21943eb3a17134421c9cebed32f925258;hb=81bbb3ce2efc1a032937f2a8da9806011aba6c8e;hpb=f9fa242f4cd7c7ad6ff7f2a603d77e721595a7ac

diff --git a/shellcode/chipcon/cc1110/reflexframe.c b/shellcode/chipcon/cc1110/reflexframe.c
index 1081c8d..57aa2ab 100644
--- a/shellcode/chipcon/cc1110/reflexframe.c
+++ b/shellcode/chipcon/cc1110/reflexframe.c
@@ -16,16 +16,18 @@ void carrier(){
    * used, except that "unmodulated" is chosen in the "Simple RX tab". This
    * results in an umodulated carrier with a frequency of approx. 2.433 GHz.
    */
-  FSCTRL1   = 0x0A;   // Frequency synthesizer control.
-  FSCTRL0   = 0x00;   // Frequency synthesizer control.
+  //FSCTRL1   = 0x0A;   // Frequency synthesizer control.
+  //FSCTRL0   = 0x00;   // Frequency synthesizer control.
+  
   
   
-    
   MDMCFG4   = 0x86;   // Modem configuration.
   MDMCFG3   = 0x83;   // Modem configuration.
   MDMCFG2   = 0x30;   // Modem configuration.
   MDMCFG1   = 0x22;   // Modem configuration.
   MDMCFG0   = 0xF8;   // Modem configuration.
+  
+  /*
   CHANNR    = 0x00;   // Channel number.
   DEVIATN   = 0x00;   // Modem deviation setting (when FSK modulation is enabled).
   FREND1    = 0x56;   // Front end RX configuration.
@@ -51,13 +53,15 @@ void carrier(){
   PKTCTRL0  = 0x22;   // Packet automation control.
   ADDR      = 0x00;   // Device address.
   PKTLEN    = 0xFF;   // Packet length.
-
+  */
   /* Settings not from SmartRF® Studio. Setting both sync word registers to
    * 0xAA = 0b10101010, i.e., the same as the preamble pattern. Not necessary,
    * but gives control of what the radio attempts to transmit.
    */
-  SYNC1     = 0xAA;
-  SYNC0     = 0xAA;
+  
+  //These sync values are better for jamming, but they break reception.
+  //SYNC1     = 0xAA;
+  //SYNC0     = 0xAA;
 
   /* Put radio in TX. 
   RFST      = RFST_STX;
@@ -81,83 +85,90 @@ void sleepMillis(int ms) {
 	};
 }
 
-//! Wait for a packet to come, then immediately return.
-void rxwait(){
-  int i=0;
-
-  //Disable interrupts.
-  RFTXRXIE=0;
-  
-  //idle a bit.
-  RFST=RFST_SIDLE;
-  while(MARCSTATE!=MARC_STATE_IDLE);
-  
-  sleepMillis(10);
-  //Begin to receive.
-  RFST=RFST_SRX;
-  while(MARCSTATE!=MARC_STATE_RX);
-  //while(MARCSTATE!=MARC_STATE_RX_OVERFLOW);
-  
-  
-  
-  //Incoming!
-  /*
-  //Fixed length
-  packet[i++]=PKTLEN;
-  while(i<PKTLEN){
-    while(!RFTXRXIF); //Wait for byte to be ready.
-    RFTXRXIF=0;      //Clear the flag.
-    
-    packet[i++]=RFD; //Grab the next byte.
-  }
-  */
-  //sleepMillis(10);
-  //RFST = RFST_SIDLE; //End receive.  
-}
 
 //! Reflexively jam on the present channel by responding to a signal with a carrier wave.
 void main(){
   unsigned char threshold=packet[0], i=0, rssi=0;;
   
-  PKTCTRL0=0x02;
   //Disable interrupts.
   RFTXRXIE=0;
   
   //carrier();
   
   //idle a bit.
-  //RFST=RFST_SIDLE;
-  //while(MARCSTATE!=MARC_STATE_IDLE);
+  RFST=RFST_SIDLE;
+  while(MARCSTATE!=MARC_STATE_IDLE);
 
   while(1){
+    //idle a bit.
+    RFST=RFST_SFSTXON;
+    while(MARCSTATE!=MARC_STATE_FSTXON);
     
+    
+    sleepMillis(5);
     rxwait();
     
-    //idle a bit.
-    RFST=RFST_SIDLE;
-    while(MARCSTATE!=MARC_STATE_IDLE);
+    //idle w/ oscillator
+    RFST=RFST_SFSTXON;
+    while(MARCSTATE!=MARC_STATE_FSTXON);
     //HALT;
     
-    RFOFF;
+    //RFOFF;
     
     //SYNC1=0xAA;
     //SYNC0=0xAA;
     
     //Transmit carrier for 10ms
-    /*
-      RFST=RFST_STX;
-      while(MARCSTATE!=MARC_STATE_TX);
-      sleepMillis(20);
-    */
-    
-    //RFON;
-    sleepMillis(200);
-    
-    //Carrier will clear when the loop continue,
-    //but we can HALT to give the host a chance to take over.
+    carrier();
+    RFON;
     HALT;
-  }  
-  RFST = RFST_SIDLE; //End transmit.
+  }
+}
+
+//! Receives a packet out of the radio from 0xFE00.
+void rxwait(){
+  unsigned char len=16, i=0;
   
-  HALT;
+  do{
+    //1-out the buffer.
+    for(i=0;i<64;i++)
+      packet[i]=0xFF;
+    i=0;
+    
+    //Disable interrupts.
+    RFTXRXIE=0;
+    
+    //idle a bit.
+    RFST=RFST_SIDLE;
+    while(MARCSTATE!=MARC_STATE_IDLE);
+    
+    //Begin to receive.
+    RFST=RFST_SRX;
+    while(MARCSTATE!=MARC_STATE_RX);
+    
+    if(PKTCTRL0&1){
+      //auto length
+      while(i<len+3){ //len+3 if status is appended.
+	while(!RFTXRXIF); //Wait for byte to be ready.
+	RFTXRXIF=0;      //Clear the flag.
+	
+	packet[i++]=RFD; //Grab the next byte.
+	len=packet[0];   //First byte of the packet is the length.
+      }
+    }else{
+      //Fixed length
+      packet[i++]=PKTLEN;
+      while(i<PKTLEN){
+	while(!RFTXRXIF); //Wait for byte to be ready.
+	RFTXRXIF=0;      //Clear the flag.
+	
+	packet[i++]=RFD; //Grab the next byte.
+      }
+    }
+    RFST = RFST_SIDLE; //End receive.
+    
+    //This while loop can be used for filtering.  Unused for now.
+  }while(0); //packet[0]==(char) 0x0f || packet[1]==(char) 0xFF || packet[9]==(char) 0x03);
 }
+
+