X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fapps%2Fradios%2Fccspi.c;h=6df045811068937ceffacd82136c5ae602630ff8;hp=bf68a58783d20eef379ddcd06535b8b5abe54c9a;hb=19c84b41b9fbde102aee56bc137a8a2885194ebf;hpb=2c299b308dca8a7667bacce7690fa6238492723f

diff --git a/firmware/apps/radios/ccspi.c b/firmware/apps/radios/ccspi.c
index bf68a58..6df0458 100644
--- a/firmware/apps/radios/ccspi.c
+++ b/firmware/apps/radios/ccspi.c
@@ -1,34 +1,64 @@
 /*! \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
+  point, all high level functionality must be moved into the client.
 */
 
 //Higher level left to client application.
 
 #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"
 
+//! Handles a Chipcon SPI command.
+void ccspi_handle_fn( uint8_t const app,
+		      uint8_t const verb,
+		      uint32_t const len);
+
+// define the ccspi app's app_t
+app_t const ccspi_app = {
+
+	/* app number */
+	CCSPI,
+
+	/* handle fn */
+	ccspi_handle_fn,
+
+	/* name */
+	"CCSPI",
 
-#define RADIOACTIVE SETCE
-#define RADIOPASSIVE CLRCE
+	/* desc */
+	"\tThe CCSPI app adds support for the Chipcon SPI register\n"
+	"\tinterface. Unfortunately, there is very little similarity\n"
+	"\tbetween the CC2420 and the CC2500, to name just two of the\n"
+	"\tmyriad of Chipcon SPI radios.  Auto-detection will be a bit\n"
+	"\tdifficult, but more to the point, all high level functionality\n"
+	"\tmust be moved into the client.\n"
+};
 
 //! Set up the pins for CCSPI mode.
 void ccspisetup(){
-  SETSS;
-  P5DIR&=~MISO;
-  P5DIR|=MOSI+SCK;
+  SPIDIR&=~MISO;
+  SPIDIR|=MOSI+SCK;
   DIRSS;
   DIRCE;
-  
+
+  P4OUT|=BIT5; //activate CC2420 voltage regulator
+  msdelay(100);
+
+  //Reset the CC2420.
+  P4OUT&=~BIT6;
+  P4OUT|=BIT6;
+
   //Begin a new transaction.
-  CLRSS; 
+  CLRSS;
   SETSS;
 }
 
@@ -37,7 +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)
@@ -45,79 +75,130 @@ u8 ccspitrans8(u8 byte){
     else
       CLRMOSI;
     byte <<= 1;
- 
+
     SETCLK;
-  
+
     /* read MISO on trailing edge */
     byte |= READMISO;
     CLRCLK;
   }
-  
+
   return byte;
 }
 
 
+//! Reflexively jam on the present channel.
+void ccspireflexjam(u16 delay){
+  unsigned long i;
+  #if defined(FIFOP) && defined(SFD) && defined(FIFO) && defined(PLED2DIR) && defined(PLED2PIN) && defined(PLED2OUT)
+  
+  prep_timer();
+  debugstr("Reflex jamming until reset.");
+  debughex(delay);
+  txdata(CCSPI,CCSPI_REFLEX,1);  //Let the client continue its business.
+  while(1) {
+    //Wait until a packet is received
+    while(!SFD){
+      //Has there been an overflow in the RX buffer?
+      if((!FIFO)&&FIFOP){
+	//debugstr("Clearing RX overflow");
+	CLRSS;
+	ccspitrans8(0x08); //SFLUSHRX
+	SETSS;
+      }
+    }
+    //Turn on LED 2 (green) as signal
+    PLED2DIR |= PLED2PIN;
+    PLED2OUT &= ~PLED2PIN;
+    
+    
+    
+    //Wait a few us to send it.
+    delay_us(delay);
+
+    //Transmit the packet.
+    CLRSS;
+    ccspitrans8(0x04);
+    SETSS;
+    
+    
+    //Load the next jamming packet.
+    //Note: attempts to preload this actually slowed the jam time down from 7 to 9 bytes.
+    CLRSS;
+    ccspitrans8(CCSPI_TXFIFO);
+    char pkt[5] = {0x05, 0, 0, 0, 0};
+    //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;
+    
+    //* I think this might be unnecessary.
+    //msdelay(100+delay);      //Instead of waiting for pulse on SFD
+    //delay_ms(1);
+    //Flush TX buffer.
+    CLRSS;
+    ccspitrans8(0x09); //SFLUSHTX
+    SETSS;
+    
+    
+    //Turn off LED 2 (green) as signal
+    PLED2DIR |= PLED2PIN;
+    PLED2OUT |= PLED2PIN;
+  }
+#else
+  debugstr("Can't reflexively jam without SFD, FIFO, FIFOP, and P2LEDx definitions - try using telosb platform.");
+  txdata(CCSPI,NOK,0);
+#endif
+}
+
+
+
 //! 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
 }
 
 //! Handles a Chipcon SPI command.
-void ccspihandle(unsigned char app,
-	       unsigned char verb,
-	       unsigned long len){
+void ccspi_handle_fn( uint8_t const app,
+		      uint8_t const verb,
+		      uint32_t const len){
   unsigned long i;
-  
-  //Drop CE to passify radio.
-  RADIOPASSIVE;
-  //Raise !SS to end transaction, just in case we forgot.
-  SETSS;
-  ccspisetup();
-  
+  u8 j;
+
+  //debugstr("Chipcon SPI handler.");
+
   switch(verb){
-    //PEEK and POKE might come later.
-  case READ:  
+  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.
+    j=cmddata[0];//Backup address.
     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.
-    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.
-    ccspitrans8(CCSPI_W_REGISTER | cmddata[0]); //001A AAAA
-    for(i=1;i<len;i++)
-      cmddata[i]=ccspitrans8(cmddata[i]);
-    SETSS;  //Raise !SS to end transaction.
+    cmddata[0]=j&~0x40;//Restore address.
     txdata(app,verb,len);
     break;
   case SETUP:
@@ -125,34 +206,218 @@ void ccspihandle(unsigned char app,
     txdata(app,verb,0);
     break;
   case CCSPI_RX:
-    RADIOPASSIVE;
-    //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:
+    ccspireflexjam(len?cmddataword[0]:0);
+    break;
+
+  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);
+    
+    //Flush TX buffer.
+    CLRSS;
+    ccspitrans8(0x09); //SFLUSHTX
+    SETSS;
+    
+
+    //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);
+    
+    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;
   }
-  
 
-  SETSS;//End session
-  RADIOACTIVE;
 }