| package primitives |
| import org.scalatest._ |
| import chiseltest._ |
| import chisel3._ |
| |
| class FifoTest extends FlatSpec with ChiselScalatestTester with Matchers { |
| behavior of "FIFO" |
| it should "store data in 2 rows and read out the first written data" in { |
| test(new Fifo(width = 8, depth = 4, pass = false, outputZeroIfEmpty = false)) {c => |
| // 1 CC |
| c.io.wvalid_i.poke(true.B) |
| c.io.wdata_i.poke("h4".U) |
| c.clock.step(1) |
| // 2 CC |
| c.io.rdata_o.expect("h4".U) |
| |
| c.io.wdata_i.poke("h8".U) |
| |
| c.clock.step(1) |
| // 3 CC |
| c.io.wvalid_i.poke(false.B) |
| |
| c.io.rready_i.poke(true.B) |
| c.io.rdata_o.expect("h4".U) |
| |
| c.clock.step(1) |
| // 4 CC |
| // |
| c.io.rdata_o.expect("h8".U) |
| // |
| c.clock.step(1) |
| // 5 CC |
| // |
| c.io.rdata_o.expect(0.U) |
| c.io.depth_o.expect(0.U) |
| // |
| c.io.wvalid_i.poke(true.B) |
| c.io.wdata_i.poke("hc".U) |
| |
| c.clock.step(1) |
| // 6 CC |
| // |
| // c.clock.step(1) |
| // |
| c.io.rdata_o.expect("hc".U) |
| c.io.depth_o.expect(1.U) |
| |
| c.io.wdata_i.poke("hd".U) |
| |
| c.clock.step(1) |
| // 7 CC |
| |
| c.io.rdata_o.expect("hd".U) |
| c.io.depth_o.expect(1.U) |
| |
| c.io.wvalid_i.poke(false.B) |
| //// |
| c.clock.step(1) |
| // 8 CC |
| c.io.wvalid_i.poke(true.B) |
| c.io.wdata_i.poke("he".U) |
| c.io.rready_i.poke(false.B) |
| |
| c.clock.step(1) |
| c.io.rdata_o.expect("he".U) |
| c.io.wdata_i.poke("hf".U) |
| |
| c.clock.step(1) |
| c.io.rdata_o.expect("he".U) |
| c.io.wdata_i.poke("h10".U) |
| |
| c.clock.step(1) |
| c.io.wdata_i.poke("h14".U) |
| |
| c.clock.step(1) |
| c.io.rdata_o.expect("he".U) |
| c.io.rready_i.poke(true.B) |
| c.io.wvalid_i.poke(false.B) |
| c.clock.step(1) |
| |
| c.io.rdata_o.expect("hf".U) |
| |
| c.clock.step(1) |
| |
| c.io.rdata_o.expect("h10".U) |
| c.io.rready_i.poke(false.B) |
| c.io.wvalid_i.poke(true.B) |
| c.io.wdata_i.poke("h18".U) |
| |
| c.clock.step(1) |
| |
| c.io.rready_i.poke(true.B) |
| c.io.wvalid_i.poke(false.B) |
| |
| c.clock.step(1) |
| c.io.rdata_o.expect("h14".U) |
| |
| c.clock.step(1) |
| c.io.rdata_o.expect("h18".U) |
| } |
| } |
| } |
