custom component and system.h

Hello,

It's allready some time ago, but I found a solution for QSYS:

In the xxx_hw.tcl:

#  #  parameters#  
add_parameter CLOCK_RATE POSITIVE 100000000 ""
set_parameter_property CLOCK_RATE DEFAULT_VALUE 100000000
set_parameter_property CLOCK_RATE DISPLAY_NAME CLOCK_RATE
set_parameter_property CLOCK_RATE WIDTH ""
set_parameter_property CLOCK_RATE TYPE POSITIVE
set_parameter_property CLOCK_RATE UNITS Hertz
set_parameter_property CLOCK_RATE DESCRIPTION ""
set_parameter_property CLOCK_RATE HDL_PARAMETER true
set_parameter_property CLOCK_RATE SYSTEM_INFO_TYPE CLOCK_RATE
set_parameter_property CLOCK_RATE SYSTEM_INFO_ARG clock
#  #  parameters for system.h#  set in ELABORATION_CALLBACK because only then, the parameters are set...#  
set_module_property ELABORATION_CALLBACK elaborate
proc elaborate {} {
    set_module_assignment embeddedsw.CMacro.FREQ u
}

This gives the folowing line in system.h:

#define MODULE_NAME_FREQ 100000000u

This solution is not realy documented somewhere. But it looks like

set_module_assignment embeddedsw.CMacro.XXX text

defines

#define MODULE_NAME_XXX text

For the clock frequenty, this can only be done in the elaborate callback because the clock is not known at loading time.

Regards,

Hannes