Echelon Neuron C - Manual (Page 53)

Neuron C Programmer’s Guide 41
count A value between 1 and 33,333. See the Neuron C Reference Guide for
the formula used in determining the duration of the delay. Values in
the range 33,334 .. 65,535 can be specified, but cause a watchdog
timer reset.
Example:
when (io_changes(io_switch))
{
delay(400); // wait 10msec for debounce
.
.
.
}
The msec_delay( ) function produces a delay of a fixed number of milliseconds
independent of the input clock speed. This function can be used with to delay for
a more precise, and shorter, period of time than the delay( ) and scaled_delay( )
functions. Its prototype is shown below:
void msec_delay (unsigned short milliseconds );
milliseconds A number of milliseconds to delay (max of 255 ms).
The scaled_delay( ) function produces a delay with a duration that scales with
input clock speed. Its syntax is:
void scaled_delay (unsigned long count );
count A value between 1 and 33,333. See the Neuron C Reference Guide for
the formula used in determining the duration of the delay.
EEPROM Write Timer
The accuracy of the configurable EEPROM write timer degrades with the speed
of the input clock. To determine the accuracy of an n millisecond timeout, use the
formula:
duration = n * delay(43)
For example, for a Series 3100 device at 625 kHz, a 20 millisecond EEPROM
write actually takes 55.2 milliseconds.