Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

signed to unsigned

i, i want to convert a 10 bit signed into a 8 bit unsigned. i tried with the altbus, but when implemented if i input -32 i get FF instead of 0. Is there an other block? which settings i have to m...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

thanks for your answer. when the input is negative i want 0

if i set the alt bus unsigned 10 bit to 8, i get in simulation:

-32 -> 0

the problem is in the implementation where i get FF.

So i used the Saturate block,

i set the bus SIGNED, i took 9 bit in output rather than 8 and i set the limit for saturation 0 to 255.

This works in implementation too.