Hi!
Thanks for the ideas. Yesterday I realized what wasn't working. I had to
recalculate the crc and now it is working. Very strange, but as long as it's
working I don't mind:)
Adina
> OK, I'm starting to get the picture I think...
> But can you just send me the whole module code,
> I'm having trouble figuring out which "data" is what.
>
> Make sure you are using ints everywhere,
> especially when calculating lengths. You may have
> some place that thinks of your buffer as chars,
> which would double the length value and cause an
> overrun someplace that is thinking in ints.
>
> Also, as long as you have the significant data length
> at the receiver, you don't really need to fill the
> rest of the buffer...or you could do a memset() on
> the whole thing first...
>
> MS
>
> adina wrote:
> > Hi!
> >
> > The Data_Message_PC is encapsulated in the TOS_Msg.data.
> >
> > The idea is the following: I receive from a mote via radio the following
> > payload:
> >
> > 01 00 02 00 03 00 04 00 05 00 06 00
> >
> > This data I want to stuff in the field actualData from the
> Data_Message_PC.
> >
> > typedef struct Data_Message_PC
> > {
> > uint16_t actualData[MAX_DATA];
> > }Data_Message_PC;
> >
> > Let's say that the variable MAX_DATA is 8. This means that I have to
> create
> > a Data_Message_PC message, which has 16 bytes of actualData, but I only
> > received 12 bytes via radio, so I need to stuff the rest of the bytes
> with
> > some values(zero for example). So the Data_Message_PC that I want to
> send
> > should look like this:
> >
> > 01 00 02 00 03 00 04 00 05 00 06 00 00 00 00 00
> >
> > As I said before, I am trying to use a for loop like this:
> >
> > for (i=0;i<lengthDataReceivedByRadio;i++) data_pc->data[i] =
> > dataReceived->data[i];
> > for (i=lengthDataReceivedByRadio;i<MAX_DATA;i++) data_pc->data[i] = 0;
> >
> > If I try to send this, the send command fails.
> >
> > Any idea is welcome,
> >
> > Adina
> >
> >
> >> I'm not entirely clear on what you are doing here. Is your
> Data_Message_PC
> >> encapsulated in TOS_Msg.data ? If not, and you are using java tools
> >> Packetizer.java (which I think MIG generated files depend on) you'll
> >> probably never see it...
> >>
> >> I just sent a reply to a message:
> >> "Receiving packets from the base station"
> >> with a couple pointers to info about the message structure.
> >>
> >> If you are trying to take a full TOS_Msg off the radio and stuff it
> >> into your Data_Message_PC the message size will be too large and you
> >> will not have the right crc. Perhaps you want to just copy the data
> >> portions from one message to another?
> >>
> >> Or are you trying to re-create the function of TOSBase, which sends
> >> messages between the pc-UART-radio?
> >>
> >> Also see how demo apps like Oscilloscope build their message packets.
> >>
> >> MS
> >>
> >>
> >> adina wrote:
> >>> Hello!
> >>>
> >>> I have a problem with sending some a message over the UART. The
> message
> >>> looks like this:
> >>>
> >>> typedef struct Data_Message_PC
> >>> {
> >>> uint16_t actualData[MAX_DATA];
> >>> uint16_t lengthData;
> >>> }Data_Message_PC;
> >>>
> >>> I receive a message from a node, that has the length of the actualData
> >> of a
> >>> length less than MAX_DATA and I need
> >>> to send it to the UART, so that a Java application can parse the
> message
> >>> received.
> >>> The Java application is using classes generated with MIG, so it always
> >>> expects that the actualData received
> >>> be of MAX_DATA length.
> >>>
> >>> I have tried to use a for(which is the solution that should have
> sense),
> >> but
> >>> it doesn't seem to work.
> >>>
> >>> for (i=0;i<lengthDataReceived;i++) data_pc->data[i] =
> >>> dataReceived->data[i];
> >>> for (i=lengthDataReceived;i<MAX_DATA;i++) data_pc->data[i] = 0;
> >>>
> >>> If I try to do it like the following, I can see using
> >>> net.tinyos.tools.Listen that it has received the message, but this
> >> doesn't
> >>> work for
> >>> me:((
> >>>
> >>
> >>
> >
>
memcpy(data_pc->data,dataReceived->data,sizeof(uint16_t)*lengthDataReceived);
> >>> call SendDataToUART.send(TOS_UART_ADDR,
> >>> sizeof(uint8_t)*(lengthDataReceived*2+7), &m_msg))
> >>>
> >>> Any help is more than welcome:)
> >>>
> >>> Thanks,
> >>> Adina
> >>>
> >
>
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