X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=shellcode%2Fchipcon%2Fcc1110%2Freflexframe.c;h=28c2da161d2aaa31ad77c0211ba8628dbbdbe7f0;hp=1081c8d21943eb3a17134421c9cebed32f925258;hb=6b7c1890ea90e22ec2c75506b274e21c35fc8af9;hpb=f9fa242f4cd7c7ad6ff7f2a603d77e721595a7ac

diff --git a/shellcode/chipcon/cc1110/reflexframe.c b/shellcode/chipcon/cc1110/reflexframe.c
index 1081c8d..28c2da1 100644
--- a/shellcode/chipcon/cc1110/reflexframe.c
+++ b/shellcode/chipcon/cc1110/reflexframe.c
@@ -2,6 +2,26 @@
 #include "cc1110-ext.h"
 
 char __xdata at 0xfe00 packet[256] ;
+
+char __xdata at 0xfdf0 cfg[5] ;
+//! Save MDMCFG*
+void save_settings(){
+  cfg[0]=MDMCFG0;
+  cfg[1]=MDMCFG1;
+  cfg[2]=MDMCFG2;
+  cfg[3]=MDMCFG3;
+  cfg[4]=MDMCFG4;
+  
+}
+//! Restore MDMCFG*
+void restore_settings(){
+  MDMCFG0=cfg[0];
+  MDMCFG1=cfg[1];
+  MDMCFG2=cfg[2];
+  MDMCFG3=cfg[3];
+  MDMCFG4=cfg[4];
+}
+
 void carrier(){
   // Set the system clock source to HS XOSC and max CPU speed,
   // ref. [clk]=>[clk_xosc.c]
@@ -16,54 +36,24 @@ 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.
-  FREND0    = 0x10;   // Front end RX configuration.
-  MCSM0     = 0x14;   // Main Radio Control State Machine configuration.
-  FOCCFG    = 0x16;   // Frequency Offset Compensation Configuration.
-  BSCFG     = 0x6C;   // Bit synchronization Configuration.
-  AGCCTRL2  = 0x03;   // AGC control.
-  AGCCTRL1  = 0x40;   // AGC control.
-  AGCCTRL0  = 0x91;   // AGC control.
-  FSCAL3    = 0xE9;   // Frequency synthesizer calibration.
-  FSCAL2    = 0x2a;   // Frequency synthesizer calibration.
-  FSCAL1    = 0x00;   // Frequency synthesizer calibration.
-  FSCAL0    = 0x1f;   // Frequency synthesizer calibration
-  
-  TEST2     = 0x88;   // Various test settings.
-  TEST1     = 0x31;   // Various test settings.
-  TEST0     = 0x09;   // Various test settings.
   
-  //FE is too high
-  PA_TABLE0 = 0xFF;   // PA output power setting.
-  PKTCTRL1  = 0x04;   // Packet automation control.
-  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;
-
-  /* Put radio in TX. 
-  RFST      = RFST_STX;
-  while ((MARCSTATE & MARCSTATE_MARC_STATE) != MARC_STATE_TX);
-  */
-
+  
+  //These sync values are better for jamming, but they break reception.
+  //SYNC1     = 0xAA;
+  //SYNC0     = 0xAA;
   
 #define RFON RFST = RFST_SIDLE; RFST = RFST_STX; while ((MARCSTATE & MARCSTATE_MARC_STATE) != MARC_STATE_TX);
 #define RFOFF RFST = RFST_SIDLE; //while ((MARCSTATE & MARCSTATE_MARC_STATE) != MARC_STATE_IDLE);
@@ -81,83 +71,101 @@ 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;
   
+  save_settings();
+  
   //carrier();
   
-  //idle a bit.
-  //RFST=RFST_SIDLE;
-  //while(MARCSTATE!=MARC_STATE_IDLE);
-
+  
   while(1){
-    
-    rxwait();
-    
     //idle a bit.
     RFST=RFST_SIDLE;
     while(MARCSTATE!=MARC_STATE_IDLE);
+    
+    
+    restore_settings();
+    //idle a bit, unecessary
+    //RFST=RFST_SFSTXON;
+    //while(MARCSTATE!=MARC_STATE_FSTXON);
+    
+    //sleepMillis(5);
+    rxwait();
+    
+    //idle w/ oscillator
+    RFST=RFST_SFSTXON;
+    while(MARCSTATE!=MARC_STATE_FSTXON);
+    
+    //HALT;
+    //sleepMillis(500);
     //HALT;
     
-    RFOFF;
+    //RFOFF;
     
     //SYNC1=0xAA;
     //SYNC0=0xAA;
     
     //Transmit carrier for 10ms
-    /*
-      RFST=RFST_STX;
-      while(MARCSTATE!=MARC_STATE_TX);
-      sleepMillis(20);
-    */
+    carrier();
+    RFON;
     
-    //RFON;
     sleepMillis(200);
     
-    //Carrier will clear when the loop continue,
-    //but we can HALT to give the host a chance to take over.
-    HALT;
-  }  
-  RFST = RFST_SIDLE; //End transmit.
+    //sleepMillis(20);
+    //HALT;
+  }
+}
+
+//! 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);
 }
+
+