blob: 22d9fab0c9f42d5b9cd76c96a505e8af0a4ad05c [file] [log] [blame]
// SPDX-FileCopyrightText: 2020 Efabless Corporation
//
// 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.
// SPDX-License-Identifier: Apache-2.0
`default_nettype wire
`timescale 1 ns / 1 ps
module usb2uart_tb;
// Testbench uses a 48 MHz clock
// Want to interface to 115200 baud UART
parameter c_CLOCK_MHZ = 48;
parameter c_UART_SPEED = 115200;
parameter c_CLOCK_PERIOD_NS = 1000/c_CLOCK_MHZ;
parameter c_CLKS_PER_BIT = c_CLOCK_MHZ*1000000/c_UART_SPEED;
parameter c_BIT_PERIOD = c_CLKS_PER_BIT*c_CLOCK_PERIOD_NS;
integer i;
integer j;
integer k;
// Signals declaration
reg clock;
reg RSTB;
reg power1, power2;
reg CSB;
wire gpio;
wire [37:0] mprj_io;
reg user_uart_rx;
/*
wire mgmt_uart_tx;
assign mgmt_uart_tx = mprj_io[6];
*/
pullup(mprj_io[3]);
assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
assign mprj_io[19] = user_uart_rx;
always #(c_CLOCK_PERIOD_NS/2) clock <= (clock === 1'b0);
initial begin
clock = 0;
end
`ifdef ENABLE_SDF
initial begin
$sdf_annotate("../../../sdf/user_proj_example.sdf", uut.mprj.mprj) ;
$sdf_annotate("../../../mgmt_core_wrapper/sdf/DFFRAM.sdf", uut.soc.DFFRAM_0) ;
$sdf_annotate("../../../mgmt_core_wrapper/sdf/mgmt_core.sdf", uut.soc.core) ;
$sdf_annotate("../../../caravel/sdf/housekeeping.sdf", uut.housekeeping) ;
$sdf_annotate("../../../caravel/sdf/chip_io.sdf", uut.padframe) ;
$sdf_annotate("../../../caravel/sdf/mprj_logic_high.sdf", uut.mgmt_buffers.mprj_logic_high_inst) ;
$sdf_annotate("../../../caravel/sdf/mprj2_logic_high.sdf", uut.mgmt_buffers.mprj2_logic_high_inst) ;
$sdf_annotate("../../../caravel/sdf/mgmt_protect_hv.sdf", uut.mgmt_buffers.powergood_check) ;
$sdf_annotate("../../../caravel/sdf/mgmt_protect.sdf", uut.mgmt_buffers) ;
$sdf_annotate("../../../caravel/sdf/caravel_clocking.sdf", uut.clocking) ;
$sdf_annotate("../../../caravel/sdf/digital_pll.sdf", uut.pll) ;
$sdf_annotate("../../../caravel/sdf/xres_buf.sdf", uut.rstb_level) ;
$sdf_annotate("../../../caravel/sdf/user_id_programming.sdf", uut.user_id_value) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_1[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_bidir_2[2] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[2] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[3] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[4] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[5] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[6] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[7] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[8] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[9] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1[10] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[2] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[3] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[4] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_1a[5] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[2] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[3] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[4] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[5] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[6] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[7] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[8] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[9] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[10] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[11] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[12] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[13] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[14] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_control_block.sdf", uut.\gpio_control_in_2[15] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.\gpio_defaults_block_0[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.\gpio_defaults_block_0[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.\gpio_defaults_block_2[0] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.\gpio_defaults_block_2[1] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.\gpio_defaults_block_2[2] ) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_5) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_6) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_7) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_8) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_9) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_10) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_11) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_12) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_13) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_14) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_15) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_16) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_17) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_18) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_19) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_20) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_21) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_22) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_23) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_24) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_25) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_26) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_27) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_28) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_29) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_30) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_31) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_32) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_33) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_34) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_35) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_36) ;
$sdf_annotate("../../../caravel/sdf/gpio_defaults_block.sdf", uut.gpio_defaults_block_37) ;
end
`endif
initial begin
$dumpfile("usb2uart.vcd");
$dumpvars(0, usb2uart_tb);
`ifdef GL
$monitor( "uart_rx_inst.rxd_reg: 0x%x", uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.rxd_reg );
`else
$monitor( "uart_rx_inst.rxd_reg: 0x%x", uut.mprj.mprj.usb2uart.u_uart.uart_rx_inst.rxd_reg );
`endif
// Repeat cycles of 1000 clock edges as needed to complete testbench
repeat (50) begin
repeat (1000) @(posedge clock);
end
$error ("Monitor: Timeout, Test Project USB Failed");
//$fatal(1);
$finish;
end
// Write a byte to RX pin
task UART_WRITE_RX_AND_RCV;
input [7:0] i_Data;
integer ii;
begin
`ifdef GL
`else
//wait(uut.mprj.mprj.usb2uart.in_ready == 1);
`endif
// Write Start Bit
#(c_BIT_PERIOD) user_uart_rx <= 1'b0;
// Write Data
for (ii=0; ii<8; ii=ii+1)
begin
#(c_BIT_PERIOD) user_uart_rx <= i_Data[ii];
end
// Write Stop Bit
#(c_BIT_PERIOD) user_uart_rx <= 1'b1;
`ifdef GL
//wait(uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tvalid_reg == 1);
`else
//@(posedge uut.mprj.mprj.usb2uart.in_valid);
//wait(uut.mprj.mprj.usb2uart.in_valid == 1);
`endif
#(c_BIT_PERIOD);
end
endtask
initial begin
// Verify Rx data from uart to usb is correct
j=0; k=0;
for (i=0; i<8; i=i+1) begin
UART_WRITE_RX_AND_RCV(i);
`ifdef GL
k[7:0] = {
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[7] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[6] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[5] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[4] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[3] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[2] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[1] ,
uut.mprj.mprj.\usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg[0] };
`else
k[7:0] = uut.mprj.mprj.usb2uart.u_uart.uart_rx_inst.m_axis_tdata_reg ;
`endif
if (k == i)
j=j+1;
else
$error("RX Test Failed - Incorrect Byte Received 0x%x", k);
end
if (j == 8)
$display("RX Test Passed - Correct Bytes Received");
else
;//$fatal(2);
$finish;
end
// Reset Operation
initial begin
RSTB <= 1'b0;
CSB <= 1'b1;
#2000;
RSTB <= 1'b1; // Release reset
#300000;
CSB <= 1'b0; // Stop driving CSB
end
initial begin // Power-up sequence
power1 <= 1'b0;
power2 <= 1'b0;
#200;
power1 <= 1'b1;
#200;
power2 <= 1'b1;
end
wire flash_csb;
wire flash_clk;
wire flash_io0;
wire flash_io1;
wire VDD3V3 = power1;
wire VDD1V8 = power2;
wire VSS = 1'b0;
caravel uut (
.vddio (VDD3V3),
.vddio_2 (VDD3V3),
.vssio (VSS),
.vssio_2 (VSS),
.vdda (VDD3V3),
.vssa (VSS),
.vccd (VDD1V8),
.vssd (VSS),
.vdda1 (VDD3V3),
.vdda1_2 (VDD3V3),
.vdda2 (VDD3V3),
.vssa1 (VSS),
.vssa1_2 (VSS),
.vssa2 (VSS),
.vccd1 (VDD1V8),
.vccd2 (VDD1V8),
.vssd1 (VSS),
.vssd2 (VSS),
.clock (clock),
.gpio (gpio),
.mprj_io (mprj_io),
.flash_csb(flash_csb),
.flash_clk(flash_clk),
.flash_io0(flash_io0),
.flash_io1(flash_io1),
.resetb (RSTB)
);
spiflash #(
.FILENAME("usb2uart.hex")
) spiflash (
.csb(flash_csb),
.clk(flash_clk),
.io0(flash_io0),
.io1(flash_io1),
.io2(), // not used
.io3() // not used
);
/*
// Testbench UART
tbuart tbuart (
.ser_rx(mgmt_uart_tx)
);
*/
endmodule
`default_nettype wire