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TLB – Top Level Baseline презентация
Содержание
- 1. TLB – Top Level Baseline
- 2. Top Level? A VI that can be
- 3. Get Installed Install VI Package Manager (free
- 4. Get Developing Tools>>TLB – New Baseline Follow Interactive Dialog
- 5. Baseline Architecture Application INIT once and only
- 6. Application INIT Sequence of cases primes the
- 7. Event Handler Responsive to button pushes and
- 8. Primary Execution Pre-defined cases handle common functions
- 9. Application Close Handles display consideration if built
- 10. The SHIFTER Master state cluster ALL data
- 11. ‘User Parameters’ Scalar inputs on the front
- 12. ‘Display Data’ Scalars, plots etc Any thing
- 13. Extra Handy Things Gracefully shuts down both
- 14. Closing note Appropriate for simple and intermediate
Top Level? A VI that can be considered the primary of a system or major component of a system Typically has front panel shown but not a requirement Controls
Слайд 1TLB – Top Level Baseline
application and component
template/tool
Norman Kirchner
Norm.Kirchner@NI.com
Слайд 2Top Level?
A VI that can be considered the primary of a
system
or major component of a system
Typically has front panel shown
but not a requirement
Controls flow of application and processing
Processing happens within executed states
Runs for lifetime of application or component
or major component of a system
Typically has front panel shown
but not a requirement
Controls flow of application and processing
Processing happens within executed states
Runs for lifetime of application or component
Слайд 3Get Installed
Install VI Package Manager (free community edition)
www.jki.net
Install package
http://lavag.org/topic/13003-tlb-top-level-baseline/
Restart LV
Refreshes tools
menu
Слайд 5Baseline Architecture
Application INIT
once and only once code
Event Handler Loop
user interaction response
Primary
Execution Loop
main flow of program
main flow of program
App Close
close references & shutdown
Слайд 6Application INIT
Sequence of cases
primes the application
stacked instead of flat for cleanliness
Not
‘all’ init. code goes here
Just once and only once stuff
Enqueues specific set of states to Primary Execution
Just once and only once stuff
Enqueues specific set of states to Primary Execution
Слайд 7Event Handler
Responsive to button pushes and value changes
Pre-defined cases handle window
close and shutdown
Source of queued messages to Primary Execution
Source of queued messages to Primary Execution
Слайд 8Primary Execution
Pre-defined cases handle common functions
Init
Error
95% of work happens here
‘Default’ case
handles state typos
Слайд 9Application Close
Handles display consideration if built into EXE
No real processing should
happen here
Use ‘Exit’ in Primary Execution
Use ‘Exit’ in Primary Execution
Слайд 10The SHIFTER
Master state cluster
ALL data associated with application
NEVER send into sub-VI
Easily
add elements through Typedef shortcut
Слайд 11‘User Parameters’
Scalar inputs on the front panel
numerics, strings, etc.
Register for ‘value
change’ event dynamically
Prevents event structure bloat
All terminals in 1 state: Update User Param.
Enables all param to be accessible to entire program without need for local Var
Prevents event structure bloat
All terminals in 1 state: Update User Param.
Enables all param to be accessible to entire program without need for local Var
Слайд 12‘Display Data’
Scalars, plots etc
Any thing that needs to get updated on
the panel
Store in shifter to provide data access to entire app
Instead of outputting directly to indicator
Call ‘Update Display’ state to refresh display
Store in shifter to provide data access to entire app
Instead of outputting directly to indicator
Call ‘Update Display’ state to refresh display
Слайд 13Extra Handy Things
Gracefully shuts down both loops
Idle state defaults to 1s
delay
Caches current values of controls on startup in case of change while not running
Graceful error in case of typo
Interactive or headless execution
Your choice
Error handling allows Stop OR continue
Caches current values of controls on startup in case of change while not running
Graceful error in case of typo
Interactive or headless execution
Your choice
Error handling allows Stop OR continue
Слайд 14Closing note
Appropriate for simple and intermediate grade applications
THIS IS NOT OVERKILL
– it has all those things that you end up implementing anyway
