import Chisel._
import chisel3.experimental.{withClockAndReset}
import freechips.rocketchip.config.Field
-import freechips.rocketchip.coreplex.{HasPeripheryBus, HasInterruptBus}
+import freechips.rocketchip.util.SyncResetSynchronizerShiftReg
+import freechips.rocketchip.coreplex.{HasPeripheryBus, PeripheryBusParams, HasInterruptBus}
import freechips.rocketchip.diplomacy.{LazyModule, LazyMultiIOModuleImp}
import sifive.blocks.devices.pinctrl.{Pin}
-import sifive.blocks.util.ShiftRegisterInit
case object PeripheryUARTKey extends Field[Seq[UARTParams]]
trait HasPeripheryUART extends HasPeripheryBus with HasInterruptBus {
- val uartParams = p(PeripheryUARTKey)
+ private val divinit = (p(PeripheryBusParams).frequency / 115200).toInt
+ val uartParams = p(PeripheryUARTKey).map(_.copy(divisorInit = divinit))
val uarts = uartParams map { params =>
val uart = LazyModule(new TLUART(pbus.beatBytes, params))
uart.node := pbus.toVariableWidthSlaves
override def cloneType: this.type =
this.getClass.getConstructors.head.newInstance(pingen).asInstanceOf[this.type]
- def fromUARTPort(uart: UARTPortIO, clock: Clock, reset: Bool, syncStages: Int = 0) {
+ def fromPort(uart: UARTPortIO, clock: Clock, reset: Bool, syncStages: Int = 0) {
withClockAndReset(clock, reset) {
txd.outputPin(uart.txd)
val rxd_t = rxd.inputPin()
- uart.rxd := ShiftRegisterInit(rxd_t, syncStages, Bool(true))
+ uart.rxd := SyncResetSynchronizerShiftReg(rxd_t, syncStages, init = Bool(true), name = Some("uart_rxd_sync"))
}
}
}