Hi! Use the PacketLink interface provided by ActiveMessageC (or RF230ActiveMessageC). There you can set the retry count on a per packet basis.
Miklos 2011/10/21 Correo de Wacka <yo_wa...@hotmail.com>: > > Hi Miklos, > > Thanks for your tips. Only one more question.. what do u mean with "use > PacketLink"? I haven't found how to fix a number of retries... > >> Date: Fri, 21 Oct 2011 14:11:27 +0200 >> Subject: Re: HardACK timeout and Retries >> From: mmar...@math.u-szeged.hu >> To: yo_wa...@hotmail.com >> CC: tinyos-help@millennium.berkeley.edu >> >> Hi Correo, >> >> 2011/10/21 Correo de Wacka <yo_wa...@hotmail.com>: >> > Hi Miklos, >> > >> > I've been reading all the post about ACK's on RF230. I would like to >> > know >> > wether is possible to change the timeout ACK for HARDWARE ACKs or is >> > fixed >> > by the transceiver. I've read int the datasheet that this timeout is 864 >> > μs. >> >> No, it is not possible to change the ACK timeout. Also, in the first >> hardware revision of the RF230 the ack timeout is way to short (I >> think it is like 5 bytes = 160 us), so you have to keep that in mind. >> >> > Because softwareack timeout has to be increased till 1100 in my app, but >> > I >> >> The shoftware ACK is increased because under heavy load the MCU cannot >> keep up (someone has to update the BaseStation and serial code for >> example, or use the fastserial lib). >> >> > don't know why, the first time I call ackrequest(), the field of MAC >> > layer >> > doesn't appear set.The next times it works fine. >> >> You have to call Packet.clear! >> >> > And my last question is, is possible to define a number of automatic >> > retries >> > if an ack is not delivered using softACKS? or is possible using >> > hardACKS? In >> > the datasheet appear that If no valid ACK is received or a timeout >> > (after >> > 864 μs) occurred, the radio transceiver retries the entire transaction, >> > including CSMA-CA execution. This repeats until the >> > frame has been acknowledged or the maximum number of retransmissions (as >> > set >> > by the register bits MAX_FRAME_RETRIES in register 0x2C) has been >> > reached. >> >> use PacketLink, it works both for HW and SW acks. No, you cannot use >> the MAX_FRAME_RETRIES parameter in HW ack mode, that is not >> implemented and never used. >> >> Best, >> Miklos >> >> > >> > >> > >> > Best regards >> > >> > David >> > >> > >> > > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
