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i2c, uart: Use Synchronizer primitives for the inputs

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This commit is contained in:
Megan Wachs
2017-09-05 18:32:37 -07:00
parent c68d556768
commit 1feaefe4c5
2 changed files with 5 additions and 5 deletions
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6
src/main/scala/devices/i2c/I2CPins.scala
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@@ -3,7 +3,7 @@ package sifive.blocks.devices.i2c
import Chisel._
import chisel3.experimental.{withClockAndReset}
import freechips.rocketchip.util.ShiftRegInit
import freechips.rocketchip.util.SynchronizerShiftRegInit
import sifive.blocks.devices.pinctrl.{Pin, PinCtrl}
class I2CPins[T <: Pin](pingen: () => T) extends Bundle {
@@ -18,11 +18,11 @@ class I2CPins[T <: Pin](pingen: () => T) extends Bundle {
withClockAndReset(clock, reset) {
scl.outputPin(i2c.scl.out, pue=true.B, ie = true.B)
scl.o.oe := i2c.scl.oe
i2c.scl.in := ShiftRegInit(scl.i.ival, syncStages, init = Bool(true))
i2c.scl.in := SynchronizerShiftRegInit(scl.i.ival, syncStages, init = Bool(true))
sda.outputPin(i2c.sda.out, pue=true.B, ie = true.B)
sda.o.oe := i2c.sda.oe
i2c.sda.in := ShiftRegInit(sda.i.ival, syncStages, init = Bool(true))
i2c.sda.in := SynchronizerShiftRegInit(sda.i.ival, syncStages, init = Bool(true))
}
}
}

4
src/main/scala/devices/uart/UARTPeriphery.scala
View File

@@ -4,7 +4,7 @@ package sifive.blocks.devices.uart
import Chisel._
import chisel3.experimental.{withClockAndReset}
import freechips.rocketchip.config.Field
import freechips.rocketchip.util.ShiftRegInit
import freechips.rocketchip.util.SynchronizerShiftRegInit
import freechips.rocketchip.coreplex.{HasPeripheryBus, PeripheryBusParams, HasInterruptBus}
import freechips.rocketchip.diplomacy.{LazyModule, LazyMultiIOModuleImp}
import sifive.blocks.devices.pinctrl.{Pin}
@@ -51,7 +51,7 @@ class UARTPins[T <: Pin] (pingen: () => T) extends Bundle {
withClockAndReset(clock, reset) {
txd.outputPin(uart.txd)
val rxd_t = rxd.inputPin()
uart.rxd := ShiftRegInit(rxd_t, n = syncStages, init = Bool(true))
uart.rxd := SynchronizerShiftRegInit(rxd_t, n = syncStages, init = Bool(true))
}
}
}