1 // See LICENSE for license details.
2 package sifive.blocks.devices.uart
5 import chisel3.experimental.{withClockAndReset}
6 import freechips.rocketchip.util.SyncResetSynchronizerShiftReg
7 import sifive.blocks.devices.pinctrl.{Pin}
9 class UARTSignals[T <: Data] (pingen: () => T) extends Bundle {
13 override def cloneType: this.type =
14 this.getClass.getConstructors.head.newInstance(pingen).asInstanceOf[this.type]
17 class UARTPins[T <: Pin] (pingen: () => T) extends UARTSignals[T](pingen)
19 object UARTPinsFromPort {
20 def apply[T <: Pin](pins: UARTSignals[T], uart: UARTPortIO, clock: Clock, reset: Bool, syncStages: Int = 0) {
21 withClockAndReset(clock, reset) {
22 pins.txd.outputPin(uart.txd)
23 val rxd_t = pins.rxd.inputPin()
24 uart.rxd := SyncResetSynchronizerShiftReg(rxd_t, syncStages, init = Bool(true), name = Some("uart_rxd_sync"))