RE: [microblaze-uclinux] "Value too large to represent" error during FPGA 'libs' build

["Kevin Somervill" <kevin.m.somervill@xxxxxxxx>]

Hello David,
|
|OK, I've traced this error:
|
|to this parameter definition:
|
|>C_TRI_DEFAULT = 11111111111111111111111111111111
|
|which is a binary definition, but is missing the '0b' prefix 
|that the Tcl script expects to be in front of binary constants.
|
|However, I can't find this parameter's definition anywhere! Is 
|this a default? If so, can anyone point me to the file that 
|defines it, so that I can add the '0b' prefix?

The file is in
$EDK\hw\XilinxProcessorIPLib\pcores\opb_gpio_v3_01_a\data\opb_gpio_v2_1_
0.mpd, but it won't have a 0b in front.  This is probably a bug in the
TCL script in that it should be able to translate the value since it's
defined as DT = std_logic_vector.  You could try to put the 0b in the
file, but this is not a long term solution since a lot of files use this
(the default for hdl std_logic_vector is bit fields).

The significance of the value is opb_gpio.pdf page 7.  It's the startup
value of the tri-state control for the gpio register.

/ks

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