Livt.Bus

tests/bridges/WishboneToAvalonBridgeTest.lvt

namespace Livt.Bus.Tests.Bridges

using Livt.Bus.Avalon.Testing
using Livt.Bus.Bridges
using Livt.Bus.Wishbone.Testing

/**
 * Verifies Wishbone Classic cycles converted to Avalon-MM.
 */
@Test
component WishboneToAvalonBridgeTest
{
	// Wishbone transaction source under test.
	upstream: WishboneTestMaster32

	// Bridge subject under test.
	bridge: WishboneToAvalonBridge32

	// Configurable Avalon-MM target.
	target: AvalonTestSlave32

	/**
	 * Connects the Wishbone source, bridge, and Avalon target.
	 */
	new()
	{
		this.upstream = new WishboneTestMaster32()
		this.bridge = new WishboneToAvalonBridge32(this.upstream)
		this.target = new AvalonTestSlave32(this.bridge)
	}

	/**
	 * Verifies delayed requests, masked writes, stored responses, and timeouts.
	 */
	@Test
	fn ForwardsTransactionsAndRecordsResponse()
	{
		target.Clear()
		target.Configure(2 as uint, 0b00)
		var bridgeTimeout = this.context.TicksFor(10us)
		var upstreamTimeout = this.context.TicksFor(20us)
		bridge.SetTimeoutTicks(bridgeTimeout)
		upstream.SetTimeoutTicks(upstreamTimeout)
		assert bridge.GetTimeoutTicks() == bridgeTimeout
		assert upstream.TryWrite32(0x08 as uint, 0x12345678 as uint, 0b1111) == true
		assert upstream.TryWrite32(0x08 as uint, 0xAA00CC00 as uint, 0b1010) == true
		assert upstream.TryRead32(0x08 as uint) == true
		assert upstream.LastReadValue() == (0xAA34CC78 as uint)
		assert bridge.LastResponse() == 0b00
		assert bridge.LastTimedOut() == false
		target.Configure(0 as uint, 0b10)
		assert upstream.TryRead32(0x08 as uint) == true
		assert bridge.LastResponse() == 0b10
		assert bridge.LastTimedOut() == false

		bridge.SetTimeoutTicks(3 as uint)
		upstream.SetTimeoutTicks(10 as uint)

		target.Configure(100 as uint, 0b00)
		assert upstream.TryWrite32(0x10 as uint, 0x55667788 as uint, 0b1111) == false
		assert bridge.IsRecovering() == true
		Simulation.Wait(120)
		assert bridge.IsRecovering() == false

		assert upstream.TryRead32(0x08 as uint) == false
		assert bridge.LastResponse() == WishboneToAvalonBridge32.RESPONSE_SLVERR
		assert bridge.LastTimedOut() == true
		Simulation.Wait(120)
		assert bridge.IsRecovering() == false

		target.Configure(0 as uint, 0b00)
		bridge.SetTimeoutTicks(10 as uint)
		upstream.SetTimeoutTicks(30 as uint)
		assert upstream.TryRead32(0x08 as uint) == true
		assert upstream.LastReadValue() == (0xAA34CC78 as uint)
		assert bridge.LastTimedOut() == false
	}
}