It worked! Thank you very much! Jung Il
On Thu, Jun 10, 2010 at 11:09 AM, Janos Sallai <[email protected]>wrote: > Jung Il: > > First, half of the packet is loaded using SpiPacket interface as usual, and >> I issue STXON command. And then the rest of the packet is loaded using >> TXFIFO_RAM interface to specify the offset in the TXFIFO. But during this >> TXFIFO_RAM.write() operation, a TX underflow occurs. CC2420 is sending some >> signal that is invisible to the sniffer. >> > Use TXFIFO.write() instead of TXFIFO_RAM.write(). The number of bytes > written to TXFIFO using TXFIFO.write() must be length+1 (the length byte and > then the payload of length lenght). TXFIFO_RAM.write() is only used to > modify whatever is in the TXFIFO. > > In theory, this must work since SPI is faster than RF. >> > On the micaz, it is possible to issue STXON first, and then upload the > whole (!) packet. I haven't tried that on the telos yet. The SPI speed on > the telos is 500kbps, which should be enough. I checked in a FastSpiByte > implementation for the msp430 recently, I suggest that you try that. > > Janos >
_______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
