On Thu, Sep 5, 2013 at 2:20 PM, ravim <ravi.mandl...@gmail.com> wrote:
> Thank you Gentlemen for the responses. I fear the same, my device does not
> wake up from LPM, and since everything depends on timer interrupt and it
> ceases to fire, the whole system does not other then interrupt of receiving
> packets.
>
> Here is my implementation of timer interrupt. Please correct me if I am
> doing it wrong.
>
> I call this initializeRandomTimer in main function
> void initializeRandomTimer(){
>
> BCSCTL3 |= LFXT1S_2;
> TACCTL0 = CCIE;
> TACCR0= 437 ;
> TACTL = MC_1 | TASSEL_1 | ID_3;
>
MC_1 is MC__UP, which counts up to CCR0 once then stops.
ID_3 divides the input clock by 8.
TASSEL_1 is TASSEL__ACLK which you configure to VLOCLK which is nominally
12 kHz. If you're dividing by 8, it's about 1500 Hz, which wraps at about
43 minutes. That you stop seeing activity after about 45-60 minutes (and
that VLOCLK is often slower then 12 kHz) makes this look like a candidate
source for the problem.
I didn't see anything where you clear TAR (reset it to zero, e.g. with
TACLR in the TACTL assignment), or where you reset the timer after the
first time it fires. Look at whatever code is resetting your timer, and
make sure it's done right. Or use MC_2 which does continuous, and reset
the target threshold with either:
TACCR0 += 437;
or
TACCR0 = TAR + 437;
in your interrupt routine (think about the differences and pick the one
appropriate to your needs). If in normal operation your timer does fire
about every 300ms (437/1500) for the 45 minutes the system works then
perhaps this isn't the issue. I'd still look pretty closely at the timer
configuration.
I don't know what this code you mention in your later mail does, but if it
does what its use implies it would not cause the problem. (What it should
do is save SR, disable interrupts, then restore SR. That'd be fine if
interrupts are enabled at all other times.)
bspIState_t intState;
BSP_ENTER_CRITICAL_SECTION(intState);
BSP_EXIT_CRITICAL_SECTION(intState);
Peter
> }
>
>
> here is my ISR
>
> interrupt(TIMERA0_VECTOR) Timer_A (void)
> {
> if(++sendInterval >= SENDINTERVAL){
> radioReady=1;
> sendInterval = 0;
>
> }
>
> P1OUT ^= 0x01;
> if(++timercounter>=20){
> globaltimer++;
> timercounter=0;
> // radioReady=1;
> }
>
> __bic_SR_register_on_exit(LPM1_bits);
> }
>
>
> and here is my for loop in main
>
> for(;;){
>
> //enter LPM1
> __bis_SR_register(LPM1_bits);
>
> //TIMER interrupt fired
>
>
> //If our radio is ready to fire
> if(radioReady==1){
>
> mrfiPacket_t packet;
> packet.frame[0] = 8+20;
> packet.frame[RXPACKET_HEADER] = TXHI;
> sendPacket(LOWPOWER, &packet);
> }
>
> }
>
> my global interrupts are enabled in main. Timer gets stuck after an hour
> or so, when receiving a packet from similar other device.
>
>
> Thanks and Regards,
> Ravi
>
>
> On Thu, Sep 5, 2013 at 6:52 AM, Peter Bigot-4 [via MSP430 gcc - Users] <
> ml-node+s1086195n6866...@n5.nabble.com> wrote:
>
> > Are you sure that there is an interrupt that will wake you from LPM1,
> that
> > it is firing, and that when it finishes it clears the LPM flags on the
> > stack so that the MCU will return to active mode? What you describe so
> > far
> > is exactly what should happen if no wakeup occurs. You should be able to
> > examine the SR value from mspdebug or gdb since it's r2.
> >
> >
> > On Thu, Sep 5, 2013 at 3:06 AM, Wayne Uroda <[hidden email]<
> http://user/SendEmail.jtp?type=node&node=6866&i=0>>
> > wrote:
> >
> > > I don't think bt actually works correctly on mspgdb (at least it never
> > has
> > > for me in the last 6 years). I recommend you check the sp directly with
> > the
> > > "info registers" command (or simply "i r"). The sp is r1 if I recall
> > > correctly.
> > >
> > > Then you can dump the memory in your stack and do something of a manual
> > > backtrace - if you know the current pc (again available through the
> > > registers) and you have a full assembly listing it should be possible
> to
> > > spot the return addresses in the stack (or simply check every word, if
> > it
> > > corresponds to a location in code just following where you called a
> > > function then it is likely a return address - note I've only ever done
> > this
> > > in my own software which I know back-to-front and it is all 16bit
> > > addressing, no msp430x).
> > >
> > > Or, you could try mspdebug - I think it has many debugging features and
> > > probably has a working "bt" command (I am still use mspgdb though so
> I'm
> > > not sure).
> > >
> > > - Wayne
> > >
> > > On 05/09/2013, at 16:38, ravim <[hidden email]<
> http://user/SendEmail.jtp?type=node&node=6866&i=1>>
> > wrote:
> > >
> > > > I am working on a project which involves CC2500 and msp430f2274. I
> > have
> > > been
> > > > struggling with a bug for more than 4 weeks, and still unable to
> debug
> > > it.
> > > > My code stops working after an hour (just time, however device keep
> > > > receiving packets)
> > > >
> > > > During my debugging, I have checked stack which is fine. I checked
> > > globals
> > > > too, which have legitimate values too.
> > > >
> > > > Whenever my code gets stuck, msp430-gdb bt always always gives me
> > just
> > > this
> > > >
> > > > 0x00008092 in main ()
> > > >
> > > > When I dissemble my code around that address,
> > > >
> > > > 08084: b0 12 72 86 CALL #wor_start
> > > > 08088: b0 12 38 90 CALL #initializeRandomTimer
> > > > 0808c: 32 d2 EINT
> > > > 0808e: 32 d0 50 00 BIS #0x0050, SR
> > > > 08092: 5f 42 0e 02 MOV.B &radioReady, R15
> > > > 08096: 5f 93 CMP.B #0x0001, R15
> > > >
> > > >
> > > > I believe some how my SR is getting corrupted. I would really
> > appreciate
> > > why
> > > > it could be getting corrupted. I mean what could be possible reasons
> > for
> > > > getting SR corruption.
> > > >
> > > > Thanks and regards.
> > > > Ravi
> > > >
> > > >
> > > >
> > > > --
> > > > View this message in context:
> > >
> >
> http://msp430-gcc-users.1086195.n5.nabble.com/SR-getting-corrupted-tp6864.html
> > > > Sent from the MSP430 gcc - Users mailing list archive at Nabble.com.
> > > >
> > > >
> > >
> >
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