lab2打包

lab2/朱梓涵24325356/scala/board/basys3/BCD2Segments.scala

@@ -0,0 +1,54 @@
+// Copyright 2021 Howard Lau
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.basys3
+
+import chisel3._
+import chisel3.util._
+
+class BCD2Segments extends Module {
+  val io = IO(new Bundle {
+    val bcd = Input(UInt(4.W))
+    val segs = Output(UInt(8.W))
+  })
+
+  val bcd = io.bcd
+  val segs = Wire(UInt(8.W))
+
+  segs := MuxLookup(
+    bcd,
+    0xFF.U,
+    IndexedSeq(
+      0.U -> "b10000001".U,
+      1.U -> "b11001111".U,
+      2.U -> "b10010010".U,
+      3.U -> "b10000110".U,
+      4.U -> "b11001100".U,
+      5.U -> "b10100100".U,
+      6.U -> "b10100000".U,
+      7.U -> "b10001111".U,
+      8.U -> "b10000000".U,
+      9.U -> "b10000100".U,
+      10.U -> "b00001000".U,
+      11.U -> "b01100000".U,
+      12.U -> "b00110001".U,
+      13.U -> "b01000010".U,
+      14.U -> "b00110000".U,
+      15.U -> "b00111000".U,
+    )
+  )
+
+  io.segs := segs
+}
+

lab2/朱梓涵24325356/scala/board/basys3/OnboardDigitDisplay.scala

@@ -0,0 +1,32 @@
+// Copyright 2021 Howard Lau
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.basys3
+
+import chisel3._
+
+class OnboardDigitDisplay extends Module {
+  val io = IO(new Bundle {
+    val digit_mask = Output(UInt(4.W))
+  })
+
+  val counter = RegInit(UInt(16.W), 0.U)
+  val digit_mask = RegInit(UInt(4.W), "b0111".U)
+
+  counter := counter + 1.U
+  when(counter === 0.U) {
+    digit_mask := (digit_mask << 1.U).asUInt + digit_mask(3)
+  }
+  io.digit_mask := digit_mask
+}

lab2/朱梓涵24325356/scala/board/basys3/SYSULogo.scala

@@ -0,0 +1,34 @@
+// Copyright 2021 Howard Lau
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.basys3
+
+import chisel3._
+import chisel3.util._
+
+class SYSULogo extends Module {
+  val io = IO(new Bundle {
+    val digit_mask = Input(UInt(4.W))
+    val segs = Output(UInt(8.W))
+  })
+
+  io.segs := MuxLookup(
+    io.digit_mask,
+    "b00100100".U, // "b0111".U, "b1101".U -> S
+    IndexedSeq(
+      "b1011".U -> "b01000100".U, // Y
+      "b1110".U -> "b01000001".U, // U
+    )
+  )
+}

lab2/朱梓涵24325356/scala/board/basys3/SegmentMux.scala

@@ -0,0 +1,42 @@
+// Copyright 2021 Howard Lau
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.basys3
+
+import chisel3._
+import chisel3.util._
+
+class SegmentMux extends Module {
+  val io = IO(new Bundle {
+    val digit_mask = Input(UInt(4.W))
+    val numbers = Input(UInt(16.W))
+    val segs = Output(UInt(8.W))
+  })
+
+
+  val digit = RegInit(UInt(4.W), 0.U)
+  val bcd2segs = Module(new BCD2Segments)
+
+  bcd2segs.io.bcd := digit
+  io.segs := bcd2segs.io.segs
+  digit := MuxLookup(
+    io.digit_mask,
+    io.numbers(3, 0), // "b1110".U
+    IndexedSeq(
+      "b1101".U -> io.numbers(7, 4),
+      "b1011".U -> io.numbers(11, 8),
+      "b0111".U -> io.numbers(15, 12)
+    )
+  )
+}

lab2/朱梓涵24325356/scala/board/basys3/Top.scala

@@ -0,0 +1,138 @@
+// Copyright 2021 Howard Lau
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.basys3
+
+import chisel3._
+import chisel3.experimental.ChiselEnum
+import chisel3.stage.{ChiselGeneratorAnnotation, ChiselStage}
+import chisel3.util._
+import peripheral.{CharacterDisplay, Dummy, InstructionROM, Memory, ROMLoader, Uart, VGADisplay, Timer}
+import riscv._
+import riscv.core.{CPU, ProgramCounter}
+
+object BootStates extends ChiselEnum {
+  val Init, Loading, Finished = Value
+}
+
+class Top extends Module {
+  val binaryFilename = "tetris.asmbin"
+  val io = IO(new Bundle {
+    val switch = Input(UInt(16.W))
+
+    val segs = Output(UInt(8.W))
+    val digit_mask = Output(UInt(4.W))
+
+    val hsync = Output(Bool())
+    val vsync = Output(Bool())
+    val rgb = Output(UInt(12.W))
+    val led = Output(UInt(16.W))
+
+    val tx = Output(Bool())
+    val rx = Input(Bool())
+
+  })
+
+  val mem = Module(new Memory(Parameters.MemorySizeInWords))
+  val vga_display = Module(new VGADisplay)
+  val display = Module(new CharacterDisplay)
+  val timer = Module(new Timer)
+  val uart = Module(new Uart(frequency = 100000000, baudRate = 115200))
+  val dummy = Module(new Dummy)
+
+  display.io.bundle <> dummy.io.bundle
+  mem.io.bundle <> dummy.io.bundle
+  mem.io.debug_read_address := 0.U
+  timer.io.bundle <> dummy.io.bundle
+  uart.io.bundle <> dummy.io.bundle
+  io.tx := uart.io.txd
+  uart.io.rxd := io.rx
+
+  val instruction_rom = Module(new InstructionROM(binaryFilename))
+  val rom_loader = Module(new ROMLoader(instruction_rom.capacity))
+
+  rom_loader.io.rom_data := instruction_rom.io.data
+  rom_loader.io.load_address := Parameters.EntryAddress
+  instruction_rom.io.address := rom_loader.io.rom_address
+
+  val CPU_clkdiv = RegInit(UInt(2.W), 0.U)
+  val CPU_tick = Wire(Bool())
+  val CPU_next = Wire(UInt(2.W))
+  CPU_next := Mux(CPU_clkdiv === 3.U, 0.U, CPU_clkdiv + 1.U)
+  CPU_tick := CPU_clkdiv === 0.U
+  CPU_clkdiv := CPU_next
+
+  withClock(CPU_tick.asClock) {
+    val cpu = Module(new CPU)
+    cpu.io.interrupt_flag := Cat(uart.io.signal_interrupt, timer.io.signal_interrupt)
+    cpu.io.csr_regs_debug_read_address := 0.U
+    cpu.io.regs_debug_read_address := 0.U
+    cpu.io.instruction_valid := rom_loader.io.load_finished
+    mem.io.instruction_address := cpu.io.instruction_address
+    cpu.io.instruction := mem.io.instruction
+
+    when(!rom_loader.io.load_finished) {
+      rom_loader.io.bundle <> mem.io.bundle
+      cpu.io.memory_bundle.read_data := 0.U
+    }.otherwise {
+      rom_loader.io.bundle.read_data := 0.U
+      when(cpu.io.deviceSelect === 4.U) {
+        cpu.io.memory_bundle <> timer.io.bundle
+      }.elsewhen(cpu.io.deviceSelect === 2.U) {
+        cpu.io.memory_bundle <> uart.io.bundle
+      }.elsewhen(cpu.io.deviceSelect === 1.U) {
+        cpu.io.memory_bundle <> display.io.bundle
+      }.otherwise {
+        cpu.io.memory_bundle <> mem.io.bundle
+      }
+    }
+  }
+
+  display.io.x := vga_display.io.x
+  display.io.y := vga_display.io.y
+
+  io.hsync := vga_display.io.hsync
+  io.vsync := vga_display.io.vsync
+
+  io.rgb := display.io.rgb
+
+  mem.io.debug_read_address := io.switch(15, 1).asUInt << 2
+  io.led := Mux(
+    io.switch(0),
+    mem.io.debug_read_data(31, 16).asUInt,
+    mem.io.debug_read_data(15, 0).asUInt,
+  )
+
+  val onboard_display = Module(new OnboardDigitDisplay)
+  io.digit_mask := onboard_display.io.digit_mask
+
+  val sysu_logo = Module(new SYSULogo)
+  sysu_logo.io.digit_mask := io.digit_mask
+
+  val seg_mux = Module(new SegmentMux)
+  seg_mux.io.digit_mask := io.digit_mask
+  seg_mux.io.numbers := io.led
+
+  io.segs := MuxLookup(
+    io.switch,
+    seg_mux.io.segs,
+    IndexedSeq(
+      0.U -> sysu_logo.io.segs
+    )
+  )
+}
+
+object VerilogGenerator extends App {
+  (new ChiselStage).execute(Array("-X", "verilog", "-td", "verilog/basys3"), Seq(ChiselGeneratorAnnotation(() => new Top)))
+}

lab2/朱梓涵24325356/scala/board/pynq/Top.scala

@@ -0,0 +1,109 @@
+// Copyright 2022 Canbin Huang
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.pynq
+
+import chisel3._
+import chisel3.stage.{ChiselGeneratorAnnotation, ChiselStage}
+import chisel3.util.Cat
+import peripheral._
+import riscv.Parameters
+import riscv.core.{CPU, ProgramCounter}
+
+class Top extends Module {
+  val binaryFilename = "hello.asmbin"
+  val io = IO(new Bundle() {
+    val hdmi_clk_n = Output(Bool())
+    val hdmi_clk_p = Output(Bool())
+    val hdmi_data_n = Output(UInt(3.W))
+    val hdmi_data_p = Output(UInt(3.W))
+    val hdmi_hpdn = Output(Bool())
+
+    val tx = Output(Bool())
+    val rx = Input(Bool())
+
+    val led = Output(UInt(4.W))
+  })
+  val mem = Module(new Memory(Parameters.MemorySizeInWords))
+  val hdmi_display = Module(new HDMIDisplay)
+  val display = Module(new CharacterDisplay)
+  val timer = Module(new Timer)
+  val uart = Module(new Uart(frequency = 125000000, baudRate = 115200))
+  val dummy = Module(new Dummy)
+
+  display.io.bundle <> dummy.io.bundle
+  mem.io.bundle <> dummy.io.bundle
+  mem.io.debug_read_address := 0.U
+  timer.io.bundle <> dummy.io.bundle
+  uart.io.bundle <> dummy.io.bundle
+  io.tx := uart.io.txd
+  uart.io.rxd := io.rx
+
+  val instruction_rom = Module(new InstructionROM(binaryFilename))
+  val rom_loader = Module(new ROMLoader(instruction_rom.capacity))
+
+  rom_loader.io.rom_data := instruction_rom.io.data
+  rom_loader.io.load_address := Parameters.EntryAddress
+  instruction_rom.io.address := rom_loader.io.rom_address
+
+  val CPU_clkdiv = RegInit(UInt(2.W),0.U)
+  val CPU_tick = Wire(Bool())
+  val CPU_next = Wire(UInt(2.W))
+  CPU_next := Mux(CPU_clkdiv === 3.U, 0.U, CPU_clkdiv + 1.U)
+  CPU_tick := CPU_clkdiv === 0.U
+  CPU_clkdiv := CPU_next
+
+  withClock(CPU_tick.asClock) {
+    val cpu = Module(new CPU)
+    cpu.io.interrupt_flag := Cat(uart.io.signal_interrupt, timer.io.signal_interrupt)
+    cpu.io.csr_regs_debug_read_address := 0.U
+    cpu.io.regs_debug_read_address := 0.U
+    cpu.io.instruction_valid := rom_loader.io.load_finished
+    mem.io.instruction_address := cpu.io.instruction_address
+    cpu.io.instruction := mem.io.instruction
+
+    when(!rom_loader.io.load_finished) {
+      rom_loader.io.bundle <> mem.io.bundle
+      cpu.io.memory_bundle.read_data := 0.U
+    }.otherwise {
+      rom_loader.io.bundle.read_data := 0.U
+      when(cpu.io.deviceSelect === 4.U) {
+        cpu.io.memory_bundle <> timer.io.bundle
+      }.elsewhen(cpu.io.deviceSelect === 2.U) {
+        cpu.io.memory_bundle <> uart.io.bundle
+      }.elsewhen(cpu.io.deviceSelect === 1.U) {
+        cpu.io.memory_bundle <> display.io.bundle
+      }.otherwise {
+        cpu.io.memory_bundle <> mem.io.bundle
+      }
+    }
+  }
+
+  io.led := 15.U(4.W)
+
+  display.io.x := hdmi_display.io.x
+  display.io.y := hdmi_display.io.y
+  display.io.video_on := hdmi_display.io.video_on
+  hdmi_display.io.rgb := display.io.rgb
+
+  io.hdmi_hpdn := 1.U
+  io.hdmi_data_n := hdmi_display.io.TMDSdata_n
+  io.hdmi_data_p := hdmi_display.io.TMDSdata_p
+  io.hdmi_clk_n := hdmi_display.io.TMDSclk_n
+  io.hdmi_clk_p := hdmi_display.io.TMDSclk_p
+}
+
+object VerilogGenerator extends App {
+  (new ChiselStage).execute(Array("-X", "verilog", "-td", "verilog/pynq"), Seq(ChiselGeneratorAnnotation(() => new Top)))
+}

lab2/朱梓涵24325356/scala/board/verilator/Top.scala

@@ -0,0 +1,47 @@
+// Copyright 2022 Canbin Huang
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.verilator
+
+import chisel3._
+import chisel3.stage.{ChiselGeneratorAnnotation, ChiselStage}
+import peripheral._
+import riscv.{CPUBundle, Parameters}
+import riscv.core.CPU
+
+class Top extends Module {
+  val io = IO(new CPUBundle)
+
+  val cpu = Module(new CPU)
+  cpu.io.regs_debug_read_address := io.regs_debug_read_address
+  cpu.io.csr_regs_debug_read_address := io.csr_regs_debug_read_address
+  io.csr_regs_debug_read_data := cpu.io.csr_regs_debug_read_data
+  io.regs_debug_read_data := cpu.io.regs_debug_read_data
+
+  // intercept UART signals
+  io.deviceSelect := cpu.io.deviceSelect
+
+  // CPU instruction input is controlled by external codes
+  io.memory_bundle <> cpu.io.memory_bundle
+  io.instruction_address := cpu.io.instruction_address
+  cpu.io.instruction := io.instruction
+  cpu.io.instruction_valid := io.instruction_valid
+
+  cpu.io.interrupt_flag := io.interrupt_flag
+}
+
+object VerilogGenerator extends App {
+  (new ChiselStage).execute(Array("-X", "verilog", "-td", "verilog/verilator"), Seq(ChiselGeneratorAnnotation(() =>
+    new Top())))
+}

lab2/朱梓涵24325356/scala/board/z710/Top.scala

@@ -0,0 +1,111 @@
+// Copyright 2022 Canbin Huang
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.z710
+
+import chisel3._
+import chisel3.stage.{ChiselGeneratorAnnotation, ChiselStage}
+import chisel3.util.Cat
+import peripheral._
+import riscv.Parameters
+import riscv.core.{CPU, ProgramCounter}
+
+class Top(binaryFilename: String = "say_goodbye.asmbin") extends Module {
+  val io = IO(new Bundle() {
+    val tx = Output(Bool())
+    val rx = Input(Bool())
+
+    val led = Output(Bool())  // z710 has few LEDs, use one for running indicator
+  })
+
+  // original ref clock is 125MHz, divided in clock_control.v by 5 to avoid total negative slack too large
+  val clock_freq = 25_000_000 
+
+  val mem = Module(new Memory(Parameters.MemorySizeInWords))
+  // val hdmi_display = Module(new HDMIDisplay)
+  // val display = Module(new CharacterDisplay)
+  val timer = Module(new Timer)
+  val uart = Module(new Uart(frequency = clock_freq, baudRate = 115200))
+  val dummy = Module(new Dummy)
+
+  // display.io.bundle <> dummy.io.bundle
+  mem.io.bundle <> dummy.io.bundle
+  mem.io.debug_read_address := 0.U
+  timer.io.bundle <> dummy.io.bundle
+  uart.io.bundle <> dummy.io.bundle
+  io.tx := uart.io.txd
+  uart.io.rxd := io.rx
+
+  val instruction_rom = Module(new InstructionROM(binaryFilename))
+  val rom_loader = Module(new ROMLoader(instruction_rom.capacity))
+
+  rom_loader.io.rom_data := instruction_rom.io.data
+  rom_loader.io.load_address := Parameters.EntryAddress
+  instruction_rom.io.address := rom_loader.io.rom_address
+
+  val CPU_clkdiv = RegInit(UInt(2.W),0.U)
+  val CPU_tick = Wire(Bool())
+  val CPU_next = Wire(UInt(2.W))
+  CPU_next := Mux(CPU_clkdiv === 3.U, 0.U, CPU_clkdiv + 1.U)
+  CPU_tick := CPU_clkdiv === 0.U
+  CPU_clkdiv := CPU_next
+
+  withClock(CPU_tick.asClock) {
+    val cpu = Module(new CPU)
+    cpu.io.interrupt_flag := Cat(uart.io.signal_interrupt, timer.io.signal_interrupt)
+    cpu.io.csr_regs_debug_read_address := 0.U
+    cpu.io.regs_debug_read_address := 0.U
+    cpu.io.instruction_valid := rom_loader.io.load_finished
+    mem.io.instruction_address := cpu.io.instruction_address
+    cpu.io.instruction := mem.io.instruction
+
+    when(!rom_loader.io.load_finished) {
+      rom_loader.io.bundle <> mem.io.bundle
+      cpu.io.memory_bundle.read_data := 0.U
+    }.otherwise {
+      rom_loader.io.bundle.read_data := 0.U
+      when(cpu.io.deviceSelect === 4.U) {
+        cpu.io.memory_bundle <> timer.io.bundle
+      }.elsewhen(cpu.io.deviceSelect === 2.U) { // deviceSelect = highest 3 bits of address, thus 0x4000_0000 is mapped to UART
+        cpu.io.memory_bundle <> uart.io.bundle
+      }.otherwise {
+        cpu.io.memory_bundle <> mem.io.bundle
+      }
+    }
+
+    when (uart.io.bundle.write_enable) {
+      val the_char = cpu.io.memory_bundle.write_data(7, 0)
+      printf(cf"${the_char.asUInt}%c")
+    }
+  }
+
+  // LED, blinks every second
+  val led_count = RegInit(0.U(32.W))
+  when (led_count >= clock_freq.U) {
+    led_count := 0.U
+  }.otherwise {
+    led_count := led_count + 1.U
+  }
+  io.led := (led_count >= (clock_freq.U >> 1))
+
+
+
+}
+
+object VerilogGenerator extends App {
+  (new ChiselStage).execute(
+    Array("-X", "verilog", "-td", "verilog/z710"), 
+    Seq(ChiselGeneratorAnnotation(() => new Top("say_goodbye.asmbin")))   // program to run on CPU
+  )
+}

lab2/朱梓涵24325356/scala/board/z710v1.3/Top.scala

@@ -0,0 +1,123 @@
+// Copyright 2022 Canbin Huang
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package board.z710v1_3
+
+import chisel3._
+import chisel3.stage.{ChiselGeneratorAnnotation, ChiselStage}
+import chisel3.util.Cat
+import peripheral._
+import riscv.Parameters
+import riscv.core.{CPU, ProgramCounter}
+
+class Top(binaryFilename: String = "say_goodbye.asmbin") extends Module {
+  val io = IO(new Bundle() {
+    val tx = Output(Bool())
+    val rx = Input(Bool())
+
+    val led = Output(Bool())  // z710 has few LEDs, use one for running indicator
+  })
+
+  
+  val clock_freq = 50_000_000
+
+  val mem = Module(new Memory(Parameters.MemorySizeInWords))
+  // val hdmi_display = Module(new HDMIDisplay)
+  // val display = Module(new CharacterDisplay)
+  val timer = Module(new Timer)
+  val uart = Module(new Uart(frequency = clock_freq, baudRate = 115200))
+  val dummy = Module(new Dummy)
+
+  // display.io.bundle <> dummy.io.bundle
+  mem.io.bundle <> dummy.io.bundle
+  mem.io.debug_read_address := 0.U
+  timer.io.bundle <> dummy.io.bundle
+  uart.io.bundle <> dummy.io.bundle
+  io.tx := uart.io.txd
+  uart.io.rxd := io.rx
+
+  val instruction_rom = Module(new InstructionROM(binaryFilename))
+  val rom_loader = Module(new ROMLoader(instruction_rom.capacity))
+
+  rom_loader.io.rom_data := instruction_rom.io.data
+  rom_loader.io.load_address := Parameters.EntryAddress
+  instruction_rom.io.address := rom_loader.io.rom_address
+
+  val CPU_clkdiv = RegInit(UInt(2.W),0.U)
+  val CPU_tick = Wire(Bool())
+  val CPU_next = Wire(UInt(2.W))
+  CPU_next := Mux(CPU_clkdiv === 3.U, 0.U, CPU_clkdiv + 1.U)
+  CPU_tick := CPU_clkdiv === 0.U
+  CPU_clkdiv := CPU_next
+
+  withClock(CPU_tick.asClock) {
+    val cpu = Module(new CPU)
+    // cpu.io.interrupt_flag := Cat(uart.io.signal_interrupt, timer.io.signal_interrupt)
+
+    /* disable interrupt flag for now, some unexpected bugs in Zybo 7010 v1.3 board*/
+    cpu.io.interrupt_flag := 0.U
+
+    cpu.io.csr_regs_debug_read_address := 0.U
+    cpu.io.regs_debug_read_address := 0.U
+    // cpu.io.debug_read_address := 0.U
+    // cpu.io.memory_bundle.read_data := 0.U
+    cpu.io.instruction_valid := rom_loader.io.load_finished
+    mem.io.instruction_address := cpu.io.instruction_address
+    cpu.io.instruction := mem.io.instruction
+
+    when(!rom_loader.io.load_finished) {
+      rom_loader.io.bundle <> mem.io.bundle
+      cpu.io.memory_bundle.read_data := 0.U
+    }.otherwise {
+      rom_loader.io.bundle.read_data := 0.U
+      when(cpu.io.deviceSelect === 2.U) {
+        cpu.io.memory_bundle <> uart.io.bundle
+      }.otherwise {
+        cpu.io.memory_bundle <> mem.io.bundle
+      }
+    }
+
+    when(!rom_loader.io.load_finished) {
+      rom_loader.io.bundle <> mem.io.bundle
+      cpu.io.memory_bundle.read_data := 0.U
+    }.otherwise {
+      rom_loader.io.bundle.read_data := 0.U
+      cpu.io.memory_bundle <> mem.io.bundle
+    }
+
+    when (uart.io.bundle.write_enable) {
+      val the_char = cpu.io.memory_bundle.write_data(7, 0)
+      printf(cf"${the_char.asUInt}%c")
+    }
+  }
+
+  // LED, blinks every second
+  val led_count = RegInit(0.U(32.W))
+  when (led_count >= clock_freq.U) {
+    led_count := 0.U
+  }.otherwise {
+    led_count := led_count + 1.U
+  }
+  io.led := (led_count >= (clock_freq.U >> 1))
+
+
+
+}
+
+object VerilogGenerator extends App {
+  (new ChiselStage).execute(
+    Array("-X", "verilog", "-td", "verilog/z710v1.3"), 
+    Seq(ChiselGeneratorAnnotation(() => new Top("say_goodbye.asmbin")))   // program to run on CPU
+  )
+}