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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