3 replies to this topic

[sfugarino]

I was looking at some Arduino code that uses timer interrupts and was wondering if there was an equivalent using the MF. There are something like 8 timers on the STM32F205RF. The Arduinoo code looks like this:

void init_interrupts(void)
{
/* First disable the timer overflow interrupt while we're configuring */
TIMSK1 &= ~(1<<TOIE1);

/* Configure timer2 in normal mode (pure counting, no PWM etc.) */
TCCR1A &= ~((1<<WGM11) | (1<<WGM10));
TCCR1B &= ~((1<<WGM13) | (1<<WGM12));


/* Disable Compare Match A interrupt enable (only want overflow) */
TIMSK1 &= ~(1<<OCIE1A);

// Prescalar = 8. Time between interrupts ~=32ms;
TCCR1B &= ~(1<<CS12); // Clear bit
TCCR1B |= (1<<CS11); // Set bit
TCCR1B &= ~(1<<CS10); // Clear bit

/* Finally load and enable the timer */
TCNT1 = tcnt1;
TIMSK1 |= (1<<TOIE1);
}


I suppose one would have write custom firmware to get at timer registers.


REF:

http://www.protostac...n-an-atmega168/

[Nevyn]

Depends upon the accuracy you are after.  NETMF has timers built in to the framework.  Have a look at this article if you are interested in finding out more.

 

Regards,

Mark

[sfugarino]

Exactly what I was looking for, thanks.

[sfugarino]

I found some code for the Cerberous boards that, I guess, uses custom firmware. Would tiis code work for Netduino? Also how about adding a HAL in the future that would give similar access to the controller's register. Arduino has this, chipKit does, and apparently GHI does or can. See the attached file.

Attached Files

•  658_755_Timer3.zip   776.54KB   5 downloads