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Altera_Forum's avatar
Altera_Forum
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13 years ago

Error: Type conversion (to UNSIGNED) can not have string literal operand

Hai all, I have run a testbench simulation in ModelSim and get this error: # ** Error: bmp_generator.vhd(401): Type conversion (to UNSIGNED) can not have string literal operand.# ** Error: ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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what the different between bp<=SXT(a,9)+b with bp<=a+b? Or is it there are same actually? Can you give simple example for both line codes? Need helps,thanks in advance

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Both are invalid syntax.

As commented in a previous thread in response to your question, SXT just extends the a signal by 1 bit.

Rather than asking these questions, you should create a Modelsim simulation and try to figure it out yourself. You'll learn much better that way.

Cheers,

Dave