Indexing of elements in a Seq of string with chisel

Question

I have, tab=Array(1.U, 6.U, 5.U, 2.U, 4.U, 3.U) and Y=Seq(b,g,g,g,b,g), tab is an array of UInt. I want to do a map on tab as follows:

tab.map(case idx=>Y(idx))

But I keep getting the error: found chisel3.core.UInt, required Int. I tried using the function peek() to convert idx to an Int by doing

tab.map(case idx=>Y(peek(idx).toInt)

but I get peek not found. I also saw that I cannot convert a chisel UInt to an Int here but did not understand the use of peek well with the example given. So please, is there another approach to do the above? Thanks!

Answer 1

The immediate problem is that you cannot access the elements of scala collections using a hardware construct like UInt or SInt. It should work if you wrap Y in a Vec. Depending on your overall module this would probably look like

val YVec = VecInit(Y)
val mappedY = tab.map { case idx => YVec(idx) }