Hi Sofia! On Thu, Jan 27, 2011 at 4:25 PM, sofia aparicio <[email protected]> wrote: > Hello, > > > Seems ok, but not sure how you access those pins. How did you verified >> that your code does not work? You cannot be sure that these pins are >> available on the 51-pins. > > I am using a MDA100 sensor board connected to my IRIS mote. I can see the > signals in OC3A, OC3B and OC3C using an oscilloscope. You can see the pines > in the 51-pin connector of the IRIS mote.
Ok. You should try to enable the interrupts and toggle LEDs just to be sure that the problem is not a 51-pin connector wirings. As far as I know, OC3A = PE3 = PIN26, OC3B = PE4 = PIN6, OC3C = PE5 = PIN5. >> > TCCR3A=0x57; >> >> COM3A = 1: toggle pin on compare match >> COM3B = 1: toggle pin on compare match >> COM3C = 2: clear pin on compare match >> WGM3:10 = 1 >> > TCCR3B=0x19; >> >> ICNC3 = 0: input capture noise canceler disabled >> ICES1 = 0: input capture falling edge >> CS3 = 1: clock running with no prescaling >> WGM3:32 = 3, therefore WGM3 = 0xD: reserved. > > This is not OK COM3C=1: toggle pin on compare match. > WGM3=0x0F; Fast PWM mode with OC3A as TOP value. Oh, you are right, I was tired apparently. > I think that the configuration is OK. Can I use this Fast PWM and to use the > tree output compares? > Or do I need to use the CTC mode? Ok, now since you are using Fast PWM (I thought that you used CTC), then Table 17-4 of the datasheet says that COM3X = 1 means that OC1A toggles the pin but OC1B and OC1C are disconnected! You might want to use another mode of operation (WGM or COM). >> By the way, the Atmega1281 has timer 4 and 5 as well! If possible, I >> suggest you to use Timer/Counter 4 or 5, as no other code uses that >> (Timer3 was used instead of Timer1 on the MicaZ and Mica2 motes ,so >> there could be codes that uses that) > > I did not know, but the problem is that I do not have these pines available > in the MDA sensor board (or in the IRIS connector). Yup. Best, Miklis > > Thank you very much. > > Sofia > > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
