Hey, Currently I am trying to disable the AUTOCRC on CC2420, or say disable the hardware frame check sequence (FCS) generation, so I have performed the following modification:
Change line 502 of cc2420/control/CC2420ControlP.nc: ( 1 << CC2420_MDMCTRL0_AUTOCRC ) | to ( 0 << CC2420_MDMCTRL0_AUTOCRC ) | According to datasheet of the CC2420, this will disable the CC2420 to calcualte the FCS by hardware. Although it also mentioned "CRC generation and verification must be performed by software.", before I could perform any further test, the node will completely stop transmitting packets, but its receiving function works fine and can still receive packets from other nodes (installed with unmodified tinyos program). I have used a separate sniffer to verified the node is not transmitting any packet. Also, it seems the blink program works fine with modified codes, the leds are blinking periodicity. Just for reference, the function call AMSend.send() at application layer returns SUCCESS. Any help would be greatly appreciated. Best, Dong
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