Test for UART

UARTTest.scala

import chisel3.iotesters.PeekPokeTester
import chisel3.iotesters.Driver
import org.scalatest._

class TestTX(dut: BufferTx) extends PeekPokeTester(dut) {
    poke(dut.io.channel.data, 0x55)
    poke(dut.io.channel.valid, 0)
    step(500)
    poke(dut.io.channel.valid, 1)
    step(10)
    poke(dut.io.channel.valid, 0)
    step(100)
    poke(dut.io.channel.data, 0x33)
    poke(dut.io.channel.valid, 1)
    step(10)
    poke(dut.io.channel.valid, 0)
    step(400)
    poke(dut.io.channel.data, 0xAA)
    poke(dut.io.channel.valid, 0)
    step(500)
    poke(dut.io.channel.valid, 1)
    step(10)  
    poke(dut.io.channel.valid, 0)
    step(100)
    poke(dut.io.channel.data, 0x33)
    poke(dut.io.channel.valid, 1)
    step(10)
    poke(dut.io.channel.valid, 0)
    step(800)
    step(800)
}

// class TestTXSpec extends FlatSpec with Matchers {
//     "TestTX" should "pass" in {
//     Driver.execute(
//       Array("--generate-vcd-output","on"), 
//       () => new BufferTx(50*1000*1000,115200*10)) {
//         c => new TestTX(c) 
//       } should be (true)
//     }
// }

class TestSender(dut: Sender) extends PeekPokeTester(dut) {
    step(1000)
    step(1000)
    step(1000)
    step(1000)
    step(1000)
    step(1000)
}
// class SenderTXSpec extends FlatSpec with Matchers {
//     "SenderTX" should "pass" in {
//     Driver.execute(
//       Array("--generate-vcd-output","on"), 
//       () => new Sender(50*1000*1000,115200*10)) {
//         c => new TestSender(c) 
//       } should be (true)
//     }
// }

class TestRx(dut: Echo) extends PeekPokeTester(dut) {
    poke(dut.io.rxd, 1)
    step(12*43)
    poke(dut.io.rxd,0)
    step(43)
    poke(dut.io.rxd,0) //1
    step(43)
    poke(dut.io.rxd,1) //2
    step(43) 
    poke(dut.io.rxd,0) //3
    step(43)
    poke(dut.io.rxd,1) //4
    step(43)
    poke(dut.io.rxd,1) //5
    step(43)
    poke(dut.io.rxd,1) //6
    step(43)
    poke(dut.io.rxd,0) //7
    step(43)              
    poke(dut.io.rxd,0) //8
    step(43)          
    poke(dut.io.rxd,1) //S1
    step(43)
    poke(dut.io.rxd,1) //S2
    step(43)  
    step(12*43)      
}
// class TestRxSpec extends FlatSpec with Matchers {
//     "TestRX" should "pass" in {
//     Driver.execute(
//       Array("--generate-vcd-output","on"), 
//       () => new Rx(50*1000*1000,115200*10)) {
//         c => new TestRx(c) 
//       } should be (true)
//     }
// }
class TestEchoSpec extends FlatSpec with Matchers {
    "TestEcho" should "pass" in {
    Driver.execute(
      Array("--generate-vcd-output","on"), 
      () => new Echo(50*1000*1000,115200*10)) {
        c => new TestRx(c) 
      } should be (true)
    }
}