Do you mean I don't remove the 0x7e bytes on each end?
Inderjit On 4/12/07, Ben Buckner <[EMAIL PROTECTED] > wrote:
Oh, you have to provide the framing structure with any packet you send to the mote. The protocol doesn't change. Ben -----Original Message----- From: Inderjit Singh [mailto:[EMAIL PROTECTED] Sent: Thursday, April 12, 2007 2:46 AM To: Ben Buckner Subject: Re: [Tinyos-help] UART ReceiveMsg Thanks Ben, I tried something very simple: 1. I get the byte stream from usb sent from the TMote like: 7e 42 xx xx xx xx 7e 2. I remove the 7e from the stream and send it back as it is (42 xx xx xx xx). But I still don't get it. C/C++ should be able to handle this no? Is there any doc on how the serial communication should be established. I have gone through the java code for sending but still it would help with a doc. Indy On 4/11/07, Ben Buckner <[EMAIL PROTECTED] > wrote: > > Hi, > > > > I have trouble sending msg from laptop (using c++) code to tmote. All the > > code is at the bottom. I have no problem reading the data from the serial > > but sending it back dooesn't seam to work. Anyone knows why? Thanks. > > > > Indy > [...] > > memcpy(output_buffer, &msgOUT, sizeof(msgOUT)); > > Out of the dozens of things that could be wrong, it might be worth pointing > out that C does not guarantee that structures can be serialized by copying > bytewise out of memory like that. It can work, but you never know. The most > usual reason why that would fail is if the compiler tries to align the > members of the structure and inserts padding (which it almost always does > with odd-sized byte fields). At any rate, it would be a good idea to make > sure that the code really generates the byte stream that you think it's > generating. > > Ben B. > > > > _______________________________________________ > Tinyos-help mailing list > [EMAIL PROTECTED] > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
_______________________________________________ Tinyos-help mailing list [EMAIL PROTECTED] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
