Another suggestion (probably not causing problems here) is to compare counters with ">=" to make sure you won't skip the "equal to" condition by glitches.
Harri
At 18:59 11.2.2005 +0100, Christian Fl�gel wrote:
Hi all!
I have wired a button to the INT0 external interrupt so that every time said button is pressed the red led should be toggled. So press button once red led is on pres it again red led is off.
Oh and I am using a mica2dot.
I have coded it in the following way
In the header file:
TOSH_ALIAS_PIN(BUTTON, INT0)
In the code
TOSH_MAKE_BUTTON_INPUT();
To debounce the button I have defined a timer which will fire every 5 Milliseconds. if several consecutive values (up to MAX_THRESHOLD) of READ_PIN are the same and indicate that the button was pressed I toggle the Led
event result_t BounceTimer.fired(){
if ((TOSH_READ_BUTTON_PIN() == 1)) { result_counter++; } else if(TOSH_READ_TASTER_PIN() == 0) { result_counter = 0; }
if(result_counter == MAX_THRESHOLD ) { result_counter = 0; if(statusOccupied == FALSE) { statusOccupied = TRUE; call Leds.redOn(); } else if(statusOccupied == TRUE) { statusOccupied = FALSE; call Leds.redOff(); } } }
This will not work as intended. If I press the button the red LED will toggle between on and off for several seconds before setttling in either the on or off state. This happens regardless of the value of MAX_THRESHOLD or the timer interval. (only the duration of the pulses is different)
So something is wrong but I do not get what it might be. Either it is my code or some other problem. The button is wired to the INT0 Pin (TP19) and the VCC Pin (TP6). My only other suggestion is that there are distortion on the wire connecting the mote and the mica2dot because it has roughly the same length as the antenna.
Any help is greatly appreciated.
Christian
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