[Tinyos-help] Re: Packet format from PC to base mote through UART

[Lei Tang]

Thanks. But it doesn't work.

If I send "7E 42 7D 5E 00 00 81 05 AA 07 44 08 11 38 40 7E", Msg->data is
"40 00 00 00 00" at the base mote. And I found that Msg->data[0] is always
the last CRC byte.

Thanks anyway.

Best,
Lei


On 6/6/06, Sankar Gorthi <sankar.b.gorthi at gmail.com> wrote:
>
> of course, i'm assuming you're using a windows based PC and are using a
> generic serial port access software (MATLAB, java etc.) to write to the
> serial port.
>
> Sankar.
>
> On Mon, 05 Jun 2006 23:35:30 -0500, Sankar Gorthi
> <sankar.b.gorthi at gmail.com> wrote:
>
> > Lei,
> >
> > you're actually right.
> >
> > You need to write to the 7E address.
> >
> > Try sending this message:
> >
> > 7E42 7D5E FFFF 7D5D 05AA 0744 0811 3840 7E
> >
> > Sankar.
> >
> >
> >
> > On Mon, 05 Jun 2006 23:23:41 -0500, Lei Tang <leitangcn at gmail.com>
> wrote:
> >
> >> Hi, Julia
> >>
> >> Thanks for your reply.
> >>
> >> I was using a general serial-port application to send data to the mote,
> >> because I want to have my own application to control motes.
> >>
> >> My steps:
> >> Firstly, I created a data file with TOS_Msg type; then the application
> >> read
> >> it and sent data to the base mote through serial port; I programmed the
> >> base
> >> mote with TOSBase, and tried to check received data in event
> >> UARTReveive.receive.
> >>
> >> Yes, you are right; the length should be 6. But I'm not sure if the
> >> address
> >> should be 0x007e, since I'm trying to send data FROM PC TO MOTE through
> >> UART. Anyway, even when I changed the two fields, Msg->data is still
> not
> >> correct.
> >>
> >> I read SimpleCmdM.nc, which is used when injecting packets (Lesson 7 in
> >> Tinyos tutorial). It seems that the received data is also TOS_Msg type
> >> (see task
> >> void cmdInterpret). I'm really confused.
> >>
> >> Thanks a lot.
> >>
> >> Best,
> >> Lei
> >>
> >> On 6/5/06, jabdo at site.uottawa.ca < jabdo at site.uottawa.ca> wrote:
> >>>
> >>>
> >>> Hi Lei,
> >>>
> >>> Are u trying to send the packet to Micaz using serial Forwarder and
> >>> Broadcast Inject. If not, What format are u using to send it???
> >>> Note: 10 represents the data length right?? so I think it should be 6
> >>> and
> >>> not 10. Also, since you are sending the packet to the UART so the
> >>> destination address should be the UART address.
> >>>
> >>>
> >>> My best regards,
> >>>
> >>> Julia
> >>>
> >>>
> >>>
> >>>
> -----------------------------------------------------------------------
> >>> >
> >>> > Hi, all
> >>> >
> >>> > I am trying to send a packet from a PC to a micaZ mote through
> serial
> >>> > cable.
> >>> > The packet looks like:
> >>> >
> >>> > 7e 42 ff ff 0 81 10 f f f f f f a1 21 7e
> >>> >        header           data    crc
> >>> >
> >>> > (I put two random bytes in the crc field, but I think that's not a
> >>> big
> >>> > problem since it doesn't filt out CRC-error packet.)
> >>> >
> >>> > At the mote, I read the received data in event TOS_MsgPrt
> >>> > UARTReveive.receive(TOS_MsgPrt Msg) {}. The header is correct, but
> >>> > Msg->data[0] is always the last CRC byte, here 0x21, and I didn't
> see
> >>> the
> >>> > data section (0xf) in Msg.
> >>> >
> >>> > Did I make a right packet? How could I send data to base mote
> >>> throught
> >>> > UART
> >>> > correctly?
> >>> >
> >>> > Thanks!
> >>> >
> >>> > Best,
> >>> > Lei Tang
> >>>
> >>>
> >>>
> >
> >
> >
>
>
>
> --
> No opera plot can be sensible, for people do not sing when they are
> feeling sensible. - W. H. Auden
>
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