To implement hardware encryption on my telosb's CC2420 I'm using code from
seluge project (
http://discovery.csc.ncsu.edu/software/Seluge/index.html#Seluge)
I'm desperate to get some form of symmetric key encryption working on my
telosb motes in tinyos1.x, so any feedback would be appreciated.
I'll even settle for ridicule :/
here goes!
If I have a piece of code like: ( this code goes in the
CC2420RadioM file)
atomic{
bSpiAvail = FALSE;
TOSH_CLR_CC_CS_PIN(); //enable chip select
outp( (( 0x08b & 0x7F) | 0x80),SPDR); //ls address and set RAM/Reg
flagbit;
while (!(inp(SPSR) & 0x80)){}; //wait for spi xfr to complete
status = inp(SPDR);
outp( ((0x08b >> 1) & 0xC0) | 0x20,SPDR); //ms address
while (!(inp(SPSR) & 0x80)){}; //wait for spi xfr to complete
status = inp(SPDR);
outp( 0 ,SPDR);
while (!(inp(SPSR) & 0x80)){}; //wait for spi xfr to complete
sender = inp(SPDR);
nonce[8] = (uint8_t)(sender & 0x00ff); //source address
TOSH_SET_CC_CS_PIN();
bSpiAvail = TRUE;
}
And I want to port it to MSP430 (telosb) I think it should look something
like this:
if (call BusArbitration.getBus() == SUCCESS) {
TOSH_CLR_RADIO_CSN_PIN();
call USARTControl.isTxIntrPending();
call USARTControl.rx(); //isRxIntrPending();
call USARTControl.tx(0x08b & 0x7F) | 0x80);
while(!(call USARTControl.isRxIntrPending())) ;
status = adjustStatusByte(call USARTControl.rx());
call USARTControl.tx((0x08b >> 1) & 0xC0) | 0x20);
while(f.enabled && !(call USARTControl.isRxIntrPending())) ;
status = adjustStatusByte(call USARTControl.rx());
call USARTControl.tx(0);
while( !(call USARTControl.isRxIntrPending())) ;
sender = (call USARTControl.rx());
TOSH_SET_RADIO_CSN_PIN();
atomic f.busy = FALSE;
call BusArbitration.releaseBus();
}
Does this look even remotely like it could work?
Jacques.
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