Removed the delay for now. Works with it, however.

[goodfet] / shellcode / chipcon / cc1110 / reflexframe.c

diff --git a/shellcode/chipcon/cc1110/reflexframe.c b/shellcode/chipcon/cc1110/reflexframe.c
index 0ca561d..4dd3ecf 100644 (file)
--- a/shellcode/chipcon/cc1110/reflexframe.c
+++ b/shellcode/chipcon/cc1110/reflexframe.c
@@ -3,63 +3,172 @@
 
 char __xdata at 0xfe00 packet[256] ;
 
-void sleepMillis(int ms) {
-       int j;
-       while (--ms > 0) { 
-               for (j=0; j<1200;j++); // about 1 millisecond
-       };
+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];
 }
 
-//! Wait for a packet to come, then immediately return.
-void rxwait(){
-  //Disable interrupts.
-  RFTXRXIE=0;
+void carrier(){
+  // Set the system clock source to HS XOSC and max CPU speed,
+  // ref. [clk]=>[clk_xosc.c]
+  SLEEP &= ~SLEEP_OSC_PD;
+  while( !(SLEEP & SLEEP_XOSC_S) );
+  CLKCON = (CLKCON & ~(CLKCON_CLKSPD | CLKCON_OSC)) | CLKSPD_DIV_1;
+  while (CLKCON & CLKCON_OSC);
+  SLEEP |= SLEEP_OSC_PD;
+
+
+  /* Setup radio with settings from SmartRF® Studio. The default settings are
+   * 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.
+  
   
-  //idle a bit.
-  RFST=RFST_SIDLE;
-  while(MARCSTATE!=MARC_STATE_IDLE);
+  MDMCFG4   = 0x86;   // Modem configuration.
+  MDMCFG3   = 0x83;   // Modem configuration.
+  MDMCFG2   = 0x30;   // Modem configuration.
+  MDMCFG1   = 0x22;   // Modem configuration.
+  MDMCFG0   = 0xF8;   // Modem configuration.
   
-  //Begin to receive.
-  RFST=RFST_SRX;
-  while(MARCSTATE!=MARC_STATE_RX);
+  /* 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.
+   */
   
-  //Incoming!  Return to let the jammer handle things.
+  //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);
+  //RFON;
+  //while(1);  
+  
+  
+}
+
+
+void sleepMillis(int ms) {
+       int j;
+       while (--ms > 0) { 
+               for (j=0; j<1200;j++); // about 1 millisecond
+       };
 }
 
+
 //! 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;;
   
-  
   //Disable interrupts.
   RFTXRXIE=0;
   
-  //idle a bit.
-  //RFST=RFST_SIDLE;
-  //while(MARCSTATE!=MARC_STATE_IDLE);
-
+  save_settings();
+  
+  //carrier();
+  
+  
   while(1){
+    //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(100);
     rxwait();
     
+    //idle w/ oscillator
+    //RFST=RFST_SFSTXON;
+    //while(MARCSTATE!=MARC_STATE_FSTXON);
+    
+    //HALT;
+    //sleepMillis(500);
+    //HALT;
+    
+    //RFOFF;
+    
+    //SYNC1=0xAA;
+    //SYNC0=0xAA;
+    
+    //Transmit carrier for 10ms
+    carrier();
+    RFON;
+    
+    //sleepMillis(200);
+    //sleepMillis(100);
+    //sleepMillis(50);
+    sleepMillis(10);
+    //HALT;
+  }
+}
+
+//! Receives a packet out of the radio from 0xFE00.
+void rxwait(){
+  unsigned char len=16, i=0;
+  
+  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);
     
-    SYNC1=0xAA;
-    SYNC0=0xAA;
+    //Begin to receive.
+    RFST=RFST_SRX;
+    while(MARCSTATE!=MARC_STATE_RX);
     
-    //Transmit carrier for 10ms
-    RFST=RFST_STX;
-    while(MARCSTATE!=MARC_STATE_TX);
-    sleepMillis(20);
+    /*
+    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<3){ //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.
     
-    //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.
-  
-  HALT;
+    //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);
 }
+
+