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 emptyimport 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.adef counter(max:UInt, a1:UInt) ={  //max:U  //errval reg = RegInit(a1)   //ok//val reg = RegInit(0.U(8.W))  //ok//val reg = RegInit(0.UInt(8.W))  //errwhen(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"))
}