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5.9.3.2
QMatrix acquisition method libraries
The QMatrix acquisition method software was subject to the above mentioned MISRA compliance
rules. The following exceptions have not been fixed as they are required for the implementation of
the library.
Applicable
release
QTouch libraries ver 5.0
Rule No
1.1
10.1
10.6
19.10
19.12
Rule Description
Rule states that all code
shall conform to ISO 9899
standard C, with no
extensions permitted.
Rule states that Illegal
implicit conversion from
Underlying long to unsigned
long
This Rule says that a 'U'
suffix shall be applied to all
constants of 'unsigned' type
Rule states that In the
definition of a function-like
macro, each instance of a
parameter shall be enclosed
in parenthesis
Rule states that there shall
be at most one occurrence
of the # or ## preprocessor
Exceptions Reason
This Rule is not supported as the library
implementation requires IAR extensions like
__interrupt. These intrinsic functions relates to
device hardware functionality, and cannot
practically be avoided
The library uses macros to combine symbol
definitions to form a unique expanded symbol
name and in this, the usage of unsigned qualifiers
for numeric constants (e.g. 98u) causes name
mangling. This is the only occurrence of this error
in the library.
The library uses macros to combine symbol
definitions to form a unique expanded symbol
name and in this, the usage of unsigned qualifiers
for numeric constants (e.g. 98u) causes name
mangling. This is the only occurrence of this error
in the library.
There is one instance where the library breaks this
rule where two macro definitions are combined to
form a different symbol name. Usage of
parenthesis cannot be used in this scenario.
There is one instance in the library where this rule
is violated where the library concatenates two
macro definitions to arrive at a different definition.
operator in a single macro
definition
5.10 Known Issues
Issue
Buiding QTouch Libraries Release 5.0 with
WinAVR Compiler results in Linker Error.
(Skipping Library libavrxxx.a, File not found).
The GCC example projects for QMatrix does not
compile the delay cycles
(QT_DELAY_CYCLES) above a value of 5
because of the preprocessor expansions.
Cause
QTouch Libraries
Release 5.0 are
build with Atmel
Studio6 Native
Toolchain Flavor.
Remedy / workaround
Always use Native Toolchain Flavor
(Advanced Tab in Project properties)
setting in Atmel Studio6 for Building
QTouch Library Release.
Recommended to remove UL from
the preprocessor constants and in
the chain of macros used for
QT_DELAY_CYCLES. Valid for
QT_DELAY_CYCLES = 5,10,25,50.
Compiling
QT600
project
files
throws
These variables are available in
111
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