>From the datasheet:
Two command strobes, SACK and SACKPEND are defined to transmit acknowledge frames with the frame pending field cleared or set, respectively. The acknowledge frame is only transmitted if the CRC is valid. The CRC is checked in hardware before the acknowledgment frame is transmitted. -David _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of renjie huang Sent: Sunday, March 16, 2008 2:12 PM To: tinyos-help@millennium.berkeley.edu Subject: [Tinyos-help] SACK It seems that in TinyOS-2.x for CC2420 SACK strobe is issued when SACK_HEADER_LENGTH bytes of data is received and address check is passed. In this way it does not check crc before issuing SACK. Is it reliable enough? Why don't we wait until the whole packet is received from RXFIFO? If I want to issue SACK strobe only after receiving the whole packet from RXFIFO, is there something I should be careful? Thanks. -- Renjie
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