I am trying to capture a 1 second block of time (count).

volatile int32_t the_time;
volatile int32_t count;
SIGNAL(SIG_OUTPUT_COMPARE0A) {
  // when Timer0 gets to its Output Compare value,
  // one one-hundredth of a second has elapsed (0.01 seconds).
  the_time++;
  if (the_time = 100) {
      count++;
  }
}

int main() {
  realtimeclock_setup();
  lcd_init();               // init lcd
  FILE lcd_stream = FDEV_SETUP_STREAM(lcd_putchar, 0, _FDEV_SETUP_WRITE);
  lcd_home();
  uart_init();              // init serial port
  FILE uart_stream = FDEV_SETUP_STREAM(uart_putchar, uart_getchar, _FDEV_SETUP_RW);
  stdin = stdout = &uart_stream;
  sei();                    // turn on interrupt handler

  while(1) {
    lcd_home();
    fprintf_P(&lcd_stream, PSTR("%16.2f sec"), (double) the_time / 100.0);
//* 
    lcd_line_two();
    fprintf_P(&lcd_stream, PSTR("Count: %.0f"), count);   
//*/
    if (count = 10)         // 10 second block
    {
        count=0;            // Start over
    }
  } 
  return 0;
}

Time stands still.

I get 1.00 sec and Count: 0

frozen nothing more.

It seems logical (doesn't it) that the the_time counts up to 100 then count is incremented by 1. Then do it again.

Why does it freeze (or more concisely why doesn't it work)?

Ralph

= is the assignment operator == is for checking a variable against another.

So when you said on line 7 if (the_time = 100) you assigned the_time the value of 100. To check against 100 it should read if (the_time == 100)

The same is true for the if statement on line 29.

Hope that helps out, I still catch myself doing this on occasion,

Rick