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Altera_Forum's avatar
Altera_Forum
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13 years ago

synthesis error 10818

Hi, while working with OpenCores SD card controller ( http://opencores.org/project,sdcard_mass_storage_controller ) I got error 10818 while trying to synthesize this for Cyclone IV (DE2-115). ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

You can use something like 

always @ (posedge clk, posedge rst) begin
if (rst) begin
 // Reset code; compile time only constants.
 xyz <= 0;
else if (enable) begin 
 // Synchronous code
 xyz <= 0;
 if (somecondition)
  xyz <= 1;
 else if (someother condition)
  xyz <= 2;
end
end

The problem in your first code snippet was that you have an action outside the first "if/else" block, so the behavior wasn't clear to the tool.