Echelon Neuron C - Manual (Page 177)

Neuron C Programmer’s Guide 165
out, and the device resets. To avoid the watchdog timer reset, use the #pragma
deadlock_is_infinite compiler directive. Do not use this directive for release
targets; it is intended only for debug targets. See the
Neuron C Reference Guide
for information about this directive.
Restrictions for Using Interrupts
Networking activity is prohibited within an interrupt task, and from any function
called from the interrupt task. If the interrupt task calls a messaging or network
variable API, the system firmware logs an error and ensures that no other action
is taken. The messaging or network variable API call returns results that
indicate an error condition, such as “no new message available” or “no buffers
available.”
Declaring one or more interrupt tasks with target hardware that does not
support this hardware interrupts yields a linker error, NLD#506.
Declaring an interrupt task in pure-C mode yields a compiler error. That is, you
cannot create a binary library of interrupt tasks, just as you cannot use when-
tasks in a precompiled function library.
Sleep Mode
You can use sleep mode to place a Series 3100 Neuron Chip or Smart Transceiver
in a low-power state. To instruct a Series 3100 Neuron Chip or Smart
Transceiver to enter sleep mode, perform the following steps:
1
Flush all pending network variable updates as well as all outstanding
outgoing and incoming messages.
2 Put the Neuron Chip or Smart Transceiver into sleep mode after the
flush completes. The Neuron Chip or Smart Transceiver always wakes
up when the service pin is activated, or when there is activity on an I/O
pin (the pin selected is configurable) or on the communications channel,
or both.
Series 5000 chips do not support sleep mode.
Example:
mtimer m_30;
network output SNVT_switch nvoValue;
static SNVT_switch temp;
when (timer_exp(m_30))
{
nvoValue = temp;
flush(TRUE);
}
when (flush_completes)
{
sleep(COMM_IGNORE);
}