Livt.Bus

tests/wishbone/WishboneMasterTest.lvt

namespace Livt.Bus.Tests.Wishbone

using Livt.Bus.Wishbone
using Livt.Bus.Wishbone.Testing

@Test
component WishboneMasterTest
{
	master: WishboneMaster32
	slave: WishboneTestSlave32

	new()
	{
		this.master = new WishboneMaster32()
		this.slave = new WishboneTestSlave32(this.master)
	}

	@Test
	fn RunsDelayedAndMaskedTransactions()
	{
		slave.Clear()
		var timeoutTicks = this.context.TicksFor(2us)
		master.SetTimeoutTicks(timeoutTicks)
		slave.ConfigureAckDelay(3 as uint)

		assert master.TryWrite32(0x0C as uint, 0x12345678 as uint, 0b1111) == true
		assert master.TryWrite32(0x0C as uint, 0xAA00CC00 as uint, 0b1010) == true
		assert master.TryRead32(0x0C as uint) == true
		assert master.LastReadValue() == (0xAA34CC78 as uint)
		assert master.LastTimedOut() == false
		assert master.cyc == 0b0
		assert master.stb == 0b0
		assert master.we == 0b0
		assert master.sel == 0b0000
	}

	@Test
	fn ReportsTimeout()
	{
		master.SetTimeoutTicks(2 as uint)
		slave.ConfigureAckDelay(20 as uint)
		assert master.TryWrite32(0x00 as uint, 0x55AA55AA as uint, 0b1111) == false
		assert master.LastTimedOut() == true
		assert master.LastResponse() == WishboneMaster32.RESPONSE_SLVERR
		assert master.cyc == 0b0
		assert master.stb == 0b0

		// The target observes cancellation and is immediately reusable.
		slave.ConfigureAckDelay(0 as uint)
		master.SetTimeoutTicks(10 as uint)
		assert master.TryRead32(0x00 as uint) == true
		assert master.LastReadValue() == (0x00000000 as uint)
		assert master.LastResponse() == WishboneMaster32.RESPONSE_OKAY
	}
}