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// See LICENSE for license details.
package chiselTests
import java.io.File
import org.scalatest._
import chisel3._
import chisel3.experimental._
import chisel3.testers.BasicTester
import chisel3.util._
// Avoid collisions with regular BlackBox tests by putting ExtModule blackboxes
// in their own scope.
package ExtModule {
class BlackBoxInverter extends ExtModule {
val in = IO(Input(Bool()))
val out = IO(Output(Bool()))
}
class BlackBoxPassthrough extends ExtModule {
val in = IO(Input(Bool()))
val out = IO(Output(Bool()))
}
}
class ExtModuleTester extends BasicTester {
val blackBoxPos = Module(new ExtModule.BlackBoxInverter)
val blackBoxNeg = Module(new ExtModule.BlackBoxInverter)
blackBoxPos.in := 1.U
blackBoxNeg.in := 0.U
assert(blackBoxNeg.out === 1.U)
assert(blackBoxPos.out === 0.U)
stop()
}
/** Instantiate multiple BlackBoxes with similar interfaces but different
* functionality. Used to detect failures in BlackBox naming and module
* deduplication.
*/
class MultiExtModuleTester extends BasicTester {
val blackBoxInvPos = Module(new ExtModule.BlackBoxInverter)
val blackBoxInvNeg = Module(new ExtModule.BlackBoxInverter)
val blackBoxPassPos = Module(new ExtModule.BlackBoxPassthrough)
val blackBoxPassNeg = Module(new ExtModule.BlackBoxPassthrough)
blackBoxInvPos.in := 1.U
blackBoxInvNeg.in := 0.U
blackBoxPassPos.in := 1.U
blackBoxPassNeg.in := 0.U
assert(blackBoxInvNeg.out === 1.U)
assert(blackBoxInvPos.out === 0.U)
assert(blackBoxPassNeg.out === 0.U)
assert(blackBoxPassPos.out === 1.U)
stop()
}
class ExtModuleSpec extends ChiselFlatSpec {
"A ExtModule inverter" should "work" in {
assertTesterPasses({ new ExtModuleTester },
Seq("/chisel3/BlackBoxTest.v"))
}
"Multiple ExtModules" should "work" in {
assertTesterPasses({ new MultiExtModuleTester },
Seq("/chisel3/BlackBoxTest.v"))
}
}
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