try running it on console and see its ouput

it works now

I'm trying to visit the request access page, but i get to see the source code of the html form!!! It's insane.

I'm using firefox 2.0.0.4 under gentoo linux.

overload? just download the zip and check the code, it's small enough IMO.

you can try with this lib: http://www.arduino.cc/playground/Main/MsTimer2

what library is that? can i see it?

try setting it as: volatile int, since interrupts sometimes do bad things with your registers.

check the FrecuencyTimer2 library on the playground.

http://www.arduino.cc/playground/Code/FrequencyTimer2

allows you to set timer2 at high rates like 40khz

May be any of you can help me.

Sometimes, when speaking to arduino from linux, i just read crap from arduino, and after some refreshes, i read good values.
Both are configured at 9600, no parity, 8bits, 1 stop bit.

Do you know why is it happening?

check the library here: http://www.arduino.cc/playground/Main/MsTimer2
i hope you like it

BroHogan, i've already done a stand-alone version (and better) that i'll post in an hour or so.

thanks, i only hope future versions of arduino compiler support something similar since it's more user-friendly IMO

woot, 2nd version, now with multiple triggers for the same timer!

Code:

// up to 5 "virtual" overflows with the same timer
#define _TIMERS 5

static unsigned int _msecs[_TIMERS];
static unsigned int _counters[_TIMERS];
static void (*_funcs[_TIMERS])();

void _overFlow();
void Timer2Init();
void Timer2Func(byte num, void (*f)());
void Timer2Ms(byte num, unsigned int msecs);  // msecs = 0 for disabling


void _overFlow() {
  byte tmp;
  
  for(tmp = 0; tmp < _TIMERS; tmp++) {
    if (_msecs[tmp] > 0) {
      _counters[tmp] += 1;
      if ((_counters[tmp] % (_msecs[tmp]*2)) == 0) {
        _counters[tmp] = 0;
        (*(_funcs[tmp]))();
      }
      }
  }
}

void Timer2Init() {
  byte tmp;
  
  for(tmp = 0; tmp < _TIMERS; tmp++) {
        _msecs[tmp] = 0;
      _funcs[tmp] = 0;
      _counters[tmp] = 0;
  }
  
  FrequencyTimer2::setPeriod(1000);
  FrequencyTimer2::setOnOverflow(_overFlow);
}

void Timer2Func(byte num, void (*f)()) {
  _funcs[num] = f;
}

void Timer2Ms(byte num, unsigned int msecs) {
  _msecs[num] = msecs;
}

And a simple example:

Code:

void flash() {
  static boolean output = HIGH;
  
  digitalWrite(13, output);
  output = !output;
}

void flash2() {
  static boolean output = HIGH;
  
  digitalWrite(12, output);
  output = !output;
}

void setup() {
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  Timer2Init();
  Timer2Ms(0, 1000);  // flash a led each second
  Timer2Func(0, flash);
  Timer2Ms(1, 3000);
  Timer2Func(1, flash2);  // flash a led each 3 seconds
}

void loop() {
}

Since this library sets timer2 interrupt using microseconds and not letting you counting in seconds, i've written a wrapper to allow this.

Code:

static unsigned int _msecs = 0;
static void (*_func)() = 0;

void _overFlow();
void Timer2Init();
void Timer2Func(void (*f)());
void Timer2Ms(unsigned int msecs);

void _overFlow() {
  static unsigned int _counter = 0;
  
  _counter += 1;
  
  if ((_counter % (_msecs*2)) == 0) {
    _counter = 0;
    (*_func)();
  }
}

void Timer2Init() {
  FrequencyTimer2::setPeriod(1000);
  FrequencyTimer2::setOnOverflow(_overFlow);
}

void Timer2Func(void (*f)()) {
  _func = f;
}

void Timer2Ms(unsigned int msecs) {
  _msecs = msecs;
}

How to use? it's very easy:

Code:

void flashLed() {
  static boolean value = HIGH;
  digitalWrite(13, value);
  value = !value;
}
  
void setup() {
  pinMode(13, OUTPUT);
  Timer2Init();
  Timer2Ms(1000); // overflow each second
  Timer2Func(flashLed);
}

void loop() {
}

Do you like it?

no existe problema alguno, cada ADC tarda su tiempo y punto.