val reg = RegInit(0.U(8.W)) //ok
val reg = RegInit(0.UInt(8.W)) //err
U 使用在数字 . 后边50.U
UInt 使用在IO(new Bundle val a = Input(UInt(8.W)) 或者 def counter(max:UInt, a1:UInt)
package empty
import chisel3._
import chisel3.util._
class MyCounter extends Module {
val io = IO(new Bundle {
val a = Input(UInt(8.W))
//val a = Input(U(8.W))
val c = Output(UInt(8.W))
})
val init = io.a
def counter(max:UInt, a1:UInt) ={
//max:U //err
val reg = RegInit(a1) //ok
//val reg = RegInit(0.U(8.W)) //ok
//val reg = RegInit(0.UInt(8.W)) //err
when(reg===max) {
reg := 0.U(max.getWidth.W)
}.otherwise {
reg := reg + 1.U(1.W)
}
reg // return value
}
io.c := counter(50.U, io.a)
}
object MyCounterMain extends App {
println("Generating the adder hardware")
emitVerilog(new MyCounter(), Array("--target-dir", "generated"))
}
