启用中断，开始调中断软件

src/main/scala/backBoard/pico/picorv32.scala

@@ -10,7 +10,7 @@ import chisel3.experimental._
 class picorv32 extends BlackBox() with HasBlackBoxResource {
   val io = IO(new Bundle {
 	val clk = Input(Bool())
-  val resetn = Input(Bool())
+	val resetn = Input(Bool())
 	val trap = Output(Bool())
 
 	val mem_valid = Output(Bool())