Thanks Xiaoyang for the help and suggestions. Will go through the mentioned documentations and try "*byte-by-byte" * handling.
Regards Jobish john On Mon, Jan 1, 2018 at 9:18 PM, Xiaoyang Zhong <xiaoz...@umail.iu.edu> wrote: > The idea is to use "*async event void UartStream.receivedByte(uint8_t > data)*" to process the stream *"byte-by-byte"*, instead of calling the > "*UartSream.receive(buf, > len)"* function. The later would return only when exactly "len" bytes are > received, and it would hold the resource. > > Processing the uart stream byte by byte is actually how the serial library > handles the received packets, since the packet length usually varies. > Please read the code in */tos/lib/serial* carefully, especially the > implementations in SerialDispatcherP, HdlcTranslateC, and SerialP. > > You should also configure the serial port to the same baud rate as the > sensor. An example uartstream with configuration is provided here: > http://tinyos-help.10906.n7.nabble.com/any-working-example-of-UartStream- > receive-td4750.html. > > Also, the following link using the Decagon MPS-2 sensor with telosb, as > your reference, especially part 2: https://zhongcs.wordpress. > com/2015/02/15/decagon-mps-2-water-potential-sensor-with-telosb-mote/. > > > > > > On Mon, Jan 1, 2018 at 9:23 AM, Jobish John <jobishjohn.m...@gmail.com> > wrote: > >> Hi, >> >> I am using telosb mote and UartStream interface in nesc to receive data >> from a sensor (Tinyos 2.1.2). Once UartStream.receive() is initiated and >> due to some reasons if the data is not received, the mote will keep on >> waiting for the data and is not able to receive or transmit any packets >> after that. >> >> I have tried to implement a timeout, based on a timer and resource >> interface as shown below. But it could not solve the issue. >> >> uses interface Resource as Resource_uart_TIVAC; >> uses interface UartStream as uart_TIVAC; >> ----------- >> ----------- >> event void Resource_uart_TIVAC.granted() >> { >> if ((call uart_TIVAC.receive(refbuf, 4))== SUCCESS) >> call uarttimeout_timer.startOneShot(1024); >> } >> ------------ >> event void uarttimeout_timer.fired() >> { >> if(call Resource_uart_TIVAC.release()!= SUCCESS) >> { >> printf("uart not released\n"); >> printfflush(); >> } >> } >> -------------- >> components new Msp430Uart0C() as uart_sensor; >> >> The uart is not getting released and telosb radio is not able to transmit >> or receive any packets after that. Please suggest a way to handle this. >> >> Thanks for your valuable time. >> >> Regards >> Wishing you a happy new year 2018.. >> Jobish John >> >> _______________________________________________ >> Tinyos-help mailing list >> Tinyos-help@millennium.berkeley.edu >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > >
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