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Altera_Forum
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11 years ago

tcl commands

For master_write_32 $master_path [expr $base_reconfig + 0x40*4], can anybody tell me what *4 means exactly? Thanks
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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For master_write_32 $master_path [expr $base_reconfig + 0x40*4], can anybody tell me what *4 means exactly? Thanks

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Avalon-MM master addresses are 32-bits wide. The address map for the reconfiguration controller probably has the register offsets in words, i.e., the register located at 32-bit word offset 0x40 is located at byte offset 4*0x40.

If the address map for the reconfiguration controller is already in byte offsets, and the register you want to access is at byte-offset 0x40, then the 4* would be unnecessary.

Cheers,

Dave