Echelon Neuron C - Manual (Page 57)

Neuron C Reference Guide 37
Neuron 3120E1 Chip, Neuron 3120E2 Chip, and 3120 Smart Transceiver,
firmware version 6 (or later) supports either algorithm. For the Neuron 3120
Chip, firmware version 4 (or later) supports either algorithm. For a Series
5000 device, firmware version 18 (or later) supports either algorithm. The
newer version of transaction tracking (the on option) is used by default when
available, unless the device is a L ON W ORKS network interface (for example,
running the MIP), or the device’s application program generates explicit
destination addresses.
These directives are not supported in model files.
#pragma unknown_system_image_extension_isa_warning
This directive causes the [NLD#477] linker message, which normally reports
an error for the use of #pragma system_image_extensions nv_length_override
on a version of the Neuron firmware that does not support system image
extension, to be changed to a warning. This change allows you to compile the
same application code for different targets with respect to their system image
support.
The Code Wizard in NodeBuilder 3.1 (and later) uses this directive to
generate Neuron C source code that compiles, for example, for a LTM-10A
target (debug platform), and a TP/FT-10F Flash Control Module (release
platform). See the discussion on Changeable Type Network Variables in the
chapter How Devices Communicate Using Network Variables of the Neuron
C Programmer's Guide for more information.
You normally do not need to specify this directive if your debug and release
targets use the same system firmware version and hardware, or if you use
conditional compilation to distinguish between the targets.
This directive is not supported in model files.
#pragma warnings_off
#pragma warnings_on
Controls the compiler’s printing of warning messages. Warning messages
generally indicate a problem in a program, or a place where code could be
improved. Warning messages are on by default at the start of a compilation.
These pragmas can be intermixed multiple times throughout a program to
turn warning message printing on and off as desired.
These directives override the settings for the #pragma enable_warning
number and #pragma disable_warning number directives.
The warnings_off and warnings_on directives are deprecated. Use the
enable_warning and disable_warning directives instead.
Other Directives
The following additional directives are defined in Neuron C Version 2.2:
#error “ text ”
This directive allows you to issue a custom error message. When this
directive is processed, program compilation fails. This directive is useful for
managing conditional compilation, for example:
#ifdef XXX