Hi,something strange compare if I try to debug the TCNT1 and OCR1B values.
Why I get only values from 0 to 255?
The timer1 is a 16bit timer
???????????????????
----Messaggio originale----
Da: canfestival-devel@lists.sourceforge.net
Data: 11-dic-2018 10.04
A: <canfestival-devel@lists.sourceforge.net>
Ogg: [Canfestival-devel] R: R: Re: R: Re: R: Re: CanFestival on ATmega64M1 in
Arduino IDE
Hi,
probably the issue is that for the ATmega64M1 I have to use the TIMER1 in CTC
mode up to OCR1A as top value?
----Messaggio originale----
Da: canfestival-devel@lists.sourceforge.net
Data: 11-dic-2018 9.12
A: <canfestival-devel@lists.sourceforge.net>
Ogg: [Canfestival-devel] R: Re: R: Re: R: Re: CanFestival on ATmega64M1 in
Arduino IDE
I'm using 8MHz external clock.
Timer should be 8us per tick since that I'm using the clkio/64 prescaler.
So the timing frequency is, or I suppose, 125Khz --> 8us.
// The timer is incrementing every 8 us.
#define MS_TO_TIMEVAL(ms) ((ms) * 125)
#define US_TO_TIMEVAL(us) ((us)>>3)
This definition seems to be correct because each timer tick = 8us.
In order to have us we have to divide the tick count value by 8 (>>3)
instead to have ms we have to multiply by 125.
It seems exact.
Why you told me that this define are incorrect?
----Messaggio originale----
Da: canfestival-devel@lists.sourceforge.net
Data: 10-dic-2018 20.58
A: <canfestival-devel@lists.sourceforge.net>
Ogg: Re: [Canfestival-devel] R: Re: R: Re: CanFestival on ATmega64M1 in Arduino
IDE
This I should be able to help you with
in timerscfg.h there are two macros that need to be correct
MS_TO_TIMEVAL and US_TO_TIMEVAL
They are used to convert ms and us to timer ticks (TIMEVAL)
What clock frequency are you using?
On Mon, Dec 10, 2018 at 3:13 PM <canfestival-devel@lists.sourceforge.net>
wrote:
>
> Hi,
>
> the issue seems relative to the timer event.
>
> If I program a transmist PDO every 100ms I can see at the beginning some PDO
> every 1 or 2 ms.
>
> After that the CANNUS stacks and I cannot receive PDOs anymore up to a new uC
> master reset, so a new canbus initialization process.
>
> Basically the timer_AVR.c file is exactly equal to the original one (for the
> at90can128) except in the initTimer function where I use the timer1 because
> the ATmega64M1 doesn't have the timer3
>
> void initTimer(void)
> /******************************************************************************
>
> Initializes the timer, turn on the interrupt and put the interrupt time to
> zero
> INPUT void
> OUTPUT void
> ******************************************************************************/
>
> {
> TimerAlarm = 0; // Set it back to the zero
>
> // Set timer 1 for CANopen operation tick 8us max, time is 524ms
> TCCR1B = (1 << CS11) | (1 << CS10); // Timer 1 normal, mit CK/64
> TIMSK1 = 1 << OCIE1B; // Enable the interrupt
> }
>
> Any comment/suggestion?
>
> Thanks in advance
>
> ----Messaggio originale----
> Da: canfestival-devel@lists.sourceforge.net
> Data: 6-dic-2018 21.04
> A: <canfestival-devel@lists.sourceforge.net>
> Ogg: Re: [Canfestival-devel] R: Re: CanFestival on ATmega64M1 in Arduino IDE
>
> Hi,
> I do not have access to a ATmega64M1, so there is no way AFIK for me
> to run and debug your code.
> Also near zero experience with Arduino, lots of experience with
> at90can128 though.
>
> I could always look at your code, but without knowing the general
> place where the problem is, it is close to impossible... for me :)
>
> When you say that only thing that is working is THE nmt message.
> Is there only one nmt message?
> What nmt state is the node in?
> Have you tried to set it to operational state?
>
> Best Regards
> Lars
> On Tue, Dec 4, 2018 at 5:26 PM <canfestival-devel@lists.sourceforge.net>
> wrote:
> >
> > The only thing which is working is the NMT message at the startup.
> >
> > No SDO response and I cannot able to make debug now.
> >
> > Can I attach the whole directory project which stay in the
> > Arduino/libraries folder to give you the whole files package?
> >
> > Thanks
> >
> > Bye
> >
> > Alessio
> >
> > ----Messaggio originale----
> > Da: canfestival-devel@lists.sourceforge.net
> > Data: 3-dic-2018 17.52
> > A: <canfestival-devel@lists.sourceforge.net>
> > Ogg: Re: [Canfestival-devel] CanFestival on ATmega64M1 in Arduino IDE
> >
> > Hi,
> > Does anything work?
> > Like heartbeat or sdo?
> >
> > could you check if the code reaches buildPDO?
> >
> > Best Regards
> > Lars
> >
> > On Sat, Dec 1, 2018 at 6:02 PM <canfestival-devel@lists.sourceforge.net>
> > wrote:
> > >
> > >
> > > Dear all,
> > >
> > > first of all many thanks to the developers and people in general that
> > > spent time on this project making it an affordable CanOpen platform for
> > > everyone.
> > >
> > > I'm new on this mailing list and here to explain my problem.
> > >
> > > I'm an electronic engineer and a researcher of University of Brescia
> > > (Italy) and I'm trying to make the canFestival working on Arduino using
> > > the Atmega64M1 uC.
> > >
> > > I know that there is the CanFestivino project that is the CanFestival
> > > porting for the Arduino IDE and the Atmega328p with the external
> > > controller MCP2515.
> > >
> > > It works but the guy that makes the porting cut several features to fit
> > > the code with the Atmega328 ROM and RAM.
> > >
> > > I reached it compilable in Arduino starting from the AVR example for the
> > > ATCAN90128. This uC is very similar to the ATmega64M1.
> > >
> > > The only things that I did was to change the timer, from timer3 to timer1
> > > (timer3 is not present on the ATmega64M1) and some tiny modifications in
> > > the CAN driver.
> > >
> > > Actually my project is compilable in Arduino where I created an example
> > > to read an analog input (A0) sending it through a PDO each 100ms.
> > >
> > > The only thing to need in order to compile it is the Arduino IDE support
> > > files for CAN enabled Amtel AVR chips: ATmega64M1, ATmega32M1, ...HERE.
> > >
> > > I cannot figure out why but actually the example doesn't work and I'm
> > > struggling on it....making me a bit crazy because I don't understand why.
> > >
> > >
> > >
> > > Hope that someone can help me in this....
> > >
> > > Thanks
> > >
> > > Alessio
> > > _______________________________________________
> > > Canfestival-devel mailing list
> > > Canfestival-devel@lists.sourceforge.net
> > >
https://lists.sourceforge.net/lists/listinfo/canfestival-devel
> >
> >
> > _______________________________________________
> > Canfestival-devel mailing list
> > Canfestival-devel@lists.sourceforge.net
> >
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> >
> >
> > _______________________________________________
> > Canfestival-devel mailing list
> > Canfestival-devel@lists.sourceforge.net
> >
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>
>
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