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mockaon: Adds logic to detect external rtc toggles

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This commit is contained in:
Shreesha Srinath
2017-08-02 18:11:05 -07:00
parent 7f368987a8
commit 26dd0af657
1 changed files with 6 additions and 1 deletions
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7
src/main/scala/devices/mockaon/MockAONPeriphery.scala
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@@ -42,7 +42,12 @@ trait HasPeripheryMockAONModuleImp extends LazyMultiIOModuleImp with HasPeripher
outer.aon.module.clock := Bool(false).asClock
outer.aon.module.reset := Bool(true)
outer.clint.module.io.rtcTick := outer.aon.module.io.rtc.asUInt.toBool
// Synchronize the external toggle into the clint
val rtc_sync = ShiftRegister(outer.aon.module.io.rtc.asUInt.toBool, 3)
val rtc_last = Reg(init = Bool(false), next=rtc_sync)
val rtc_tick = Reg(init = Bool(false), next=(rtc_sync & (~rtc_last)))
outer.clint.module.io.rtcTick := rtc_tick
outer.aon.module.io.ndreset := outer.debug.module.io.ctrl.ndreset
}