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33 lines
984 B
Scala
33 lines
984 B
Scala
// Copyright 2021 Howard Lau
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package board.basys3
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import chisel3._
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class OnboardDigitDisplay extends Module {
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val io = IO(new Bundle {
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val digit_mask = Output(UInt(4.W))
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})
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val counter = RegInit(UInt(16.W), 0.U)
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val digit_mask = RegInit(UInt(4.W), "b0111".U)
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counter := counter + 1.U
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when(counter === 0.U) {
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digit_mask := (digit_mask << 1.U).asUInt + digit_mask(3)
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}
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io.digit_mask := digit_mask
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}
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