[Tinyos-help] Link layer acknowledgement in CTP

2008-12-21 Thread Kirak Hong
Hello guys, I'm using CTP and found some redundant transmission problem. I think it retransmits redundant packets because PacketAcknowledgements.wasAcked is not working well. On transmitter side, wasAcked() in CtpForwardingEngineP.nc:SubSend.sendDone() sometimes returns FALSE although the

Re: [Tinyos-help] Link layer acknowledgement in CTP

2008-12-21 Thread Kirak Hong
. - Original Message - From: Omprakash Gnawali gnaw...@usc.edu Date: Sunday, December 21, 2008 5:07 pm Subject: Re: [Tinyos-help] Link layer acknowledgement in CTP To: Kirak Hong hok...@eecs.berkeley.edu Cc: tinyos-help@millennium.berkeley.edu On Sun, Dec 21, 2008 at 4:53 PM, Kirak Hong

Re: [Tinyos-help] Link layer acknowledgement in CTP

2008-12-21 Thread Kirak Hong
- From: Kirak Hong hok...@eecs.berkeley.edu Date: Sunday, December 21, 2008 6:23 pm Subject: Re: [Tinyos-help] Link layer acknowledgement in CTP To: Omprakash Gnawali gnaw...@usc.edu Cc: tinyos-help@millennium.berkeley.edu I just found that the wasAcked() function always returns FALSE if I don't

[Tinyos-help] About Interrupt handling

2008-09-04 Thread Kirak, Hong
Hi guys, I'm making a communication system using UART0, and it seems UART overrun error frequently happens. I read some document about UART, and it says if UART interrupt is not fast enough, that error occurs. I'm doing nothing but a UART transmission, so I'm suspecting CPU is doing

[Tinyos-help] UART with RADIO stack

2008-07-24 Thread Kirak, Hong
Hi, guys, Does anyone have used uart0 and radio concurrently on telosb mote? It seems even if I handle resource arbitration, if a radio packet arrives during uart transmission, overrun error happens on uart. I think it's because MSP 430 is too slow to handle radio interrupt within 69

[Tinyos-help] data rate of cc2420 on tmote

2008-07-14 Thread Kirak, Hong
Hi, I found some articles about cc2420 data rate from mailing list. Is it true that maximum reliable data rate is about 50kbps? (without any interferences) Actually I only achieved 30kbps, but I think it's because that I serialized sending. (send - sendDone - send - .) And I didn't

[Tinyos-help] About resource arbitration between Uart0 and Radio on telosb mote

2008-07-02 Thread Kirak, Hong
Hello, guys, I'm making a program which uses radio and uart0 on the telosb mote. Since the radio and uart0 share bus on telosb, I had to deal with resource arbitration. The thing is, when I made an uart0 manager like this, it dosen't work. More specifically, after some time, I

[Tinyos-help] Uart0 Serial Stack as Default Owner of Arbiter

2008-07-02 Thread Kirak, Hong
Hi, guys, I am struggling with some resource arbitration problem with CC2420 and UART0. What I want to do is, making UART0 serial stack as a default owner of USART bus. But it looks like it is not enough that I just connect default owner interface to serial stack because it seems like

[Tinyos-help] Resource arbitration between CC2420 and Uart0 on Telosb

2008-06-30 Thread Kirak, Hong
Hello, guys, I'm making a program which uses radio and uart0 on the telosb mote. Since the radio and uart0 share bus on telosb, I had to deal with resource arbitration. The thing is, when I made an uart0 manager like this, it dosen't work. More specifically, after some time, I