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Implementing and Handling Applications
DS1104 Hardware Installation and Configuration March 2004
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Basics of Booting the DS1104
If you power-up or perform a hardware reset of the host PC, the board
always starts executing the boot firmware contained in the flash
memory. The boot firmware checks for an application program
currently stored in flash memory. If it finds one, this application is
started. If it does not detect an application, the loader enters the idle
state.
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If power is turned off, any application that was previously loaded
to global memory is lost.
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To avoid having the DS1104 execute an application stored in flash
memory after power-up, the flash memory must be cleared (see
Clearing an application
on page 57).
Warm boot/reload
If the DS1104 is in the idle state after power-up or if an executing
application has been stopped by ControlDesk, you can start a new
application by loading it to the global or flash memory. If you load an
application to the flash memory, it is copied to the global memory
before it is started. Any application already in global memory is
overwritten.
If you start the application again using ControlDesk’s
Reload Application/Start Simulation toolbar button, you can reload the
most recently loaded application to the global memory. If the most
recently loaded application was loaded to the flash memory, it is
copied to the global memory. Then, the application is started
automatically.
Execution time
If an application is loaded to the flash memory, it is copied to the
global memory of the DS1104 before it is started. Thus, it makes no
difference to the speed and execution time of the application during
run time whether the DS1104 booted the application from the global
or the flash memory.
Содержание CLP1104
Страница 6: ...Contents DS1104 Hardware Installation and Configuration March 2004 I 6 ...
Страница 20: ...Safety Precautions DS1104 Hardware Installation and Configuration March 2004 I 20 ...
Страница 70: ...Implementing and Handling Applications DS1104 Hardware Installation and Configuration March 2004 I 70 ...
Страница 118: ...Mapping of I O Signals DS1104 Hardware Installation and Configuration March 2004 I 118 ...
Страница 156: ...Signal Connection to External Devices DS1104 Hardware Installation and Configuration March 2004 I 156 ...
Страница 162: ...Data Sheets DS1104 Hardware Installation and Configuration March 2004 I 162 ...