//! Handles a Chipcon SPI command.
void ccspi_handle_fn( uint8_t const app,
- uint8_t const verb,
- uint32_t const len);
+ uint8_t const verb,
+ uint32_t const len);
// define the ccspi app's app_t
app_t const ccspi_app = {
DIRSS;
DIRCE;
- P4OUT|=BIT5; //activate CC2420 voltage regulator
+ //P4OUT|=BIT5; //activate CC2420 voltage regulator
msdelay(100);
//Reset the CC2420.
- P4OUT&=~BIT6;
- P4OUT|=BIT6;
+ /*P4OUT&=~BIT6; FIXME Does the new code work on Z1 and Telosb?
+ P4OUT|=BIT6;*/
+ CLRCE;
+ SETCE;
//Begin a new transaction.
CLRSS;
}
+//! 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 bytes into the CC2420's RAM. Untested.
+void ccspi_pokeram(u8 addr, char *data, int len){
+ CLRSS;
+ //Begin with the start address.
+ ccspitrans8(0x80 | (addr & 0x7F));
+ ccspitrans8(((addr>>1)&0xC0) // MSBits are high bits of 9-bit address.
+ // Read/!Write bit should be clear to write.
+ );
+
+ //Data goes here.
+ while(len--)
+ ccspitrans8(*data++);
+
+ SETSS;
+}
+
+//! Read bytes from the CC2420's RAM. Untested.
+void ccspi_peekram(u16 addr, u8 *data, u16 len){
+ CLRSS;
+
+ //Begin with the start address.
+ ccspitrans8(0x80 | (addr & 0x7F));
+ ccspitrans8(((addr>>1)&0xC0) // MSBits are high bits of 9-bit address.
+ | BIT5 // Read/!Write bit should be set to read.
+ );
+
+ //Data goes here.
+ while(len--)
+ *data++=ccspitrans8(0);
+
+ SETSS;
+}
+
+//! Updates the Nonce's sequence number.
+void ccspi_updaterxnonce(u32 seq){
+
+}
+
//! Writes a register
u8 ccspi_regwrite(u8 reg, const u8 *buf, int len){
CLRSS;
uint8_t const verb,
uint32_t const len){
unsigned long i;
+ u8 j;
//debugstr("Chipcon SPI handler.");
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.
+ cmddata[0]=j&~0x40;//Restore address.
txdata(app,verb,len);
break;
case SETUP:
ccspisetup();
txdata(app,verb,0);
break;
+ case CCSPI_PEEK_RAM:
+ i=cmddataword[1]; // Backup length.
+ ccspi_peekram(cmddataword[0], // First word is the address.
+ cmddata, // Return in the same buffer.
+ cmddataword[1] // Second word is the length.
+ );
+ txdata(app,verb,i);
+ break;
+ case CCSPI_POKE_RAM:
+ ccspi_pokeram(cmddataword[0], //First word is address
+ cmddata+2, //Remainder of buffer is dat.
+ len-2 //Length implied by packet length.
+ );
+ txdata(app,verb,0);
+ break;
case CCSPI_RX:
#ifdef FIFOP
//Has there been an overflow?
if((!FIFO)&&FIFOP){
- //debugstr("Clearing overflow");
+ debugstr("Clearing overflow");
CLRSS;
ccspitrans8(0x08); //SFLUSHRX
+ ccspitrans8(0x08); //SFLUSHRX
SETSS;
+ txdata(app,verb,0); //no packet
+ return;
}
-
+
+ /* Uncomment this to wait around a bit for the packet.
+ Might reduce dropped packet count.
+ i=1000; //Number of tries.
+ while(!(FIFOP&&FIFO) && i--);
+ */
+
//Is there a packet?
- if(FIFOP&&FIFO){
+ if (FIFOP && FIFO){
//Wait for completion.
while(SFD);
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);
+ cmddata[0]=0x20; //to be replaced with length
+
+
+ /* This reads too far on some CC2420 revisions, but on others it
+ works fine. It probably has to do with whether FIFO drops
+ before or after the SPI clocking.
+
+ A software fix is to reset the CC2420 between packets. This
+ works, but a better solution is desired.
+ */
+ //for(i=0;i<cmddata[0]+1;i++)
+ for(i=0;FIFO && i<0x80;i++)
+ cmddata[i]=ccspitrans8(0x00);
+ SETSS;
+
+ /* We used to flush the RX buffer after receive. No longer.
+ CLRSS;
+ ccspitrans8(0x08); //SFLUSHRX
+ SETSS;
+ */
+
+ //Only transmit a packet if the length is legal.
+ if(cmddata[0]&0x80 || cmddata[0]==0) i=0;
+ txdata(app,verb,i);
+ }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_RXDEC:
+#ifdef FIFOP
+ //Has there been an overflow?
+ if((!FIFO)&&FIFOP){
+ debugstr("Clearing overflow");
+ CLRSS;
+ ccspitrans8(0x08); //SFLUSHRX
SETSS;
+ txdata(app,verb,0); //no packet
+ return;
+ }
- //Flush buffer.
- //CLRSS;
- //ccspitrans8(0x08); //SFLUSHRX
- //SETSS;
+ //Is there a packet?
+ if(FIFOP&&FIFO){
+ //Wait for completion.
+ while(SFD);
+
+ CLRSS;
+ ccspitrans8(CCSPI_RXFIFO | 0x40);
+ // Grab the length.
+ cmddata[0]=ccspitrans8(0x00);
+
+ //Read the header first.
+ for(i=1;i<cmddata[0]+1 && i<0x11;i++)
+ cmddata[i]=ccspitrans8(0x00);
+ SETSS;
+
+ //Is the frame encrypted?
+ if(cmddata[1]&BIT3){
+ //Copy the sequence number to the Nonce.
+
+
+ //Decrypt the rest of the packet.
+ CLRSS; ccspitrans8(CCSPI_SRXDEC); SETSS;
+
+ //Wait for decryption to complete.
+ while(!FIFO);
+
+ }
+
+
+ //Get the packet, which is now decrypted in position.
+ CLRSS;
+ ccspitrans8(CCSPI_RXFIFO | 0x40);
+ //ccspitrans8(0x3F|0x40);
- //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);
+ /* This reads too far on some CC2420 revisions, but on others it
+ works fine. It probably has to do with whether FIFO drops
+ before or after the SPI clocking.
+
+ A software fix is to reset the CC2420 between packets. This
+ works, but a better solution is desired.
+ */
+ for(;i<cmddata[0]+1;i++)
+ cmddata[i]=ccspitrans8(0x00);
+ SETSS;
+
+ //Only forward a packet if the length is legal.
+ if(cmddata[0]&0x80) i=0;
+ txdata(app,verb,i);
}else{
//No packet.
txdata(app,verb,0);
break;
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.
+ ccspireflexjam(len?cmddataword[0]:0);
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)
//TODO disable AUTOCRC here again to go back to promiscous mode
//Turn off LED 2 (green) as signal
- PLED2DIR |= PLED2PIN;
- PLED2OUT |= PLED2PIN;
+ PLED2DIR |= PLED2PIN;
+ PLED2OUT |= PLED2PIN;
}
//TODO the firmware stops staying in this mode after a while, and stops jamming... need to find a fix.
#else
//Wait for last packet to TX.
//while(ccspi_status()&BIT3);
+
+ //Flush TX buffer.
+ CLRSS;
+ ccspitrans8(0x09); //SFLUSHTX
+ SETSS;
+
//Load the packet.
CLRSS;
//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.");
projects / goodfet / blobdiff