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Altera_Forum's avatar
Altera_Forum
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8 years ago

Set initial value at beginning

I am using the Deo Nano SoC and I want to initialize some register values at startup without hitting a reset button. If there is a way to do this, please show me. I need this for run time and not sim...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

For this question, Verilog is good and I am working on the FPGA side. I did not want to pick a language and scare off ~1/2 of my answer base.

I have read in some discussions that something like

reg [31:0] a_word = 32'd123;

is only good for simulation and the value "123" gets ignored when it is put in a .sof file to load in the FPGA for synthesizing.

The syntax 'reg id = constant;' is all you need to do to get the configured powerup value of the register to be set to that constant.

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