The CC2420 radio requires the acknowledgment request flag be set in the FCF byte before it will automatically generate a hardware acknowledgment for any received packet.
-David -----Original Message----- From: Rodolfo de Paz Alberola [mailto:[EMAIL PROTECTED] Sent: Thursday, February 14, 2008 9:12 AM To: David Moss Cc: 'tinyos-help' Subject: RE: [Tinyos-help] CC2420 Hardware ACKs Hi David, On Thu, 2008-02-14 at 08:56 -0700, David Moss wrote: Are you requesting an acknowledgment before sending? > > call PacketAcknowledgements.requestAck(&myMsg); > call AMSend.send(0x0, &myMsg, sizeof(my_payload_t)); > No, I thought that only calling the command setAutoAck it should enable MDMCTRL0.AUTOACK leaving to the CC2420 radio chip all the process. This command that you mention for requesting acks I think that only works for SW acks. Does it the software work as expected using software acknowledgments? > Yes, I did another application using software acknowledgments and it works fine, but in this case I would like to use hw acks since i am trying to model the cc2420 radiochip which has hw acks as well. Thanks for your help. Any idea? -------- Rodo On Thu, 2008-02-14 at 08:56 -0700, David Moss wrote: > Are you requesting an acknowledgment before sending? > > call PacketAcknowledgements.requestAck(&myMsg); > call AMSend.send(0x0, &myMsg, sizeof(my_payload_t)); > > Does it the software work as expected using software acknowledgments? > > -David > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Rodolfo de > Paz Alberola > Sent: Thursday, February 14, 2008 4:28 AM > To: tinyos-help > Subject: [Tinyos-help] CC2420 Hardware ACKs > > Hi all, > > I was trying to set Hardware ACKs for CC2420 radio chip. I did a simple > ping pong application in which I posted a task call ack() inside the > event SplitControl.startDone(error_t error). > > The task call ack activates HW acknowledgements in the following way: > > bool activated = TRUE; > task void ack() { > atomic{ > call CC2420Config.setAutoAck(activated,activated); > if (call CC2420Config.sync() != SUCCESS) { > post ack(); > } > } > > However, the mote that is sending messages is not receiving any ack. > Should I do anything else to activate CC2420 HW acks?. Any help? > > Regards, > > ----- > Rodo > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
