X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=shellcode%2Fchipcon%2Fcc1110%2Freflexframe.c;fp=shellcode%2Fchipcon%2Fcc1110%2Freflexframe.c;h=0ca561dbd5ab31c85f063174c47a75ef89facd6f;hp=0000000000000000000000000000000000000000;hb=8f3ecaa2ecd27948480534d866f9c686fa14a019;hpb=d104aae4508ff7fbbe99a1d12fed27f6d859518f

diff --git a/shellcode/chipcon/cc1110/reflexframe.c b/shellcode/chipcon/cc1110/reflexframe.c
new file mode 100644
index 0000000..0ca561d
--- /dev/null
+++ b/shellcode/chipcon/cc1110/reflexframe.c
@@ -0,0 +1,65 @@
+#include <cc1110.h>
+#include "cc1110-ext.h"
+
+char __xdata at 0xfe00 packet[256] ;
+
+void sleepMillis(int ms) {
+	int j;
+	while (--ms > 0) { 
+		for (j=0; j<1200;j++); // about 1 millisecond
+	};
+}
+
+//! Wait for a packet to come, then immediately return.
+void rxwait(){
+  //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);
+  
+  //Incoming!  Return to let the jammer handle things.
+  
+}
+
+//! 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);
+
+  while(1){
+    
+    rxwait();
+    
+    //idle a bit.
+    RFST=RFST_SIDLE;
+    while(MARCSTATE!=MARC_STATE_IDLE);
+    
+    SYNC1=0xAA;
+    SYNC0=0xAA;
+    
+    //Transmit carrier for 10ms
+    RFST=RFST_STX;
+    while(MARCSTATE!=MARC_STATE_TX);
+    sleepMillis(20);
+    
+    //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;
+}