blob: b0df093890ce7ebacc5e8288942e2ccc87ee09a8 [file] [log] [blame]
`default_nettype none
`timescale 1 ns / 1 ps
`include "caravel.v"
`include "spiflash.v"
module pll_tb;
reg clock;
reg power1;
reg power2;
reg RSTB;
wire gpio;
wire [15:0] checkbits;
wire [7:0] spivalue;
wire [37:0] mprj_io;
wire flash_csb;
wire flash_clk;
wire flash_io0;
wire flash_io1;
wire SDO;
assign checkbits = mprj_io[31:16];
assign spivalue = mprj_io[15:8];
// External clock is used by default. Make this artificially fast for the
// simulation. Normally this would be a slow clock and the digital PLL
// would be the fast clock.
always #10 clock <= (clock === 1'b0);
initial begin
clock = 0;
initial begin
$dumpvars(0, pll_tb);
repeat (25) begin
repeat (1000) @(posedge clock);
$display("+1000 cycles");
$display ("Monitor: Timeout, Test PLL (RTL) Failed");
// Monitor
initial begin
wait(checkbits == 16'hA040);
$display("Monitor: Test PLL (RTL) Started");
wait(checkbits == 16'hA041);
// $display(" SPI value = 0x%x (should be 0x04)", spivalue);
// if(spivalue !== 32'h04) begin
// $display("Monitor: Test PLL (RTL) Failed");
// $finish;
// end
wait(checkbits == 16'hA042);
// $display(" SPI value = 0x%x (should be 0x56)", spivalue);
// if(spivalue !== 32'h56) begin
// $display("Monitor: Test PLL (RTL) Failed");
// $finish;
// end
wait(checkbits == 16'hA090);
$display("Monitor: Test PLL (RTL) Passed");
initial begin
RSTB <= 1'b0;
RSTB <= 1'b1; // Release reset
initial begin
power1 <= 1'b0;
power2 <= 1'b0;
power1 <= 1'b1;
power2 <= 1'b1;
always @(checkbits) begin
#1 $display("GPIO state = %b ", checkbits);
wire VDD3V3;
wire VDD1V8;
wire VSS;
assign VDD3V3 = power1;
assign VDD1V8 = power2;
assign VSS = 1'b0;
caravel uut (
.vddio (VDD3V3),
.vssio (VSS),
.vdda (VDD3V3),
.vssa (VSS),
.vccd (VDD1V8),
.vssd (VSS),
.vdda1 (VDD3V3),
.vdda2 (VDD3V3),
.vssa1 (VSS),
.vssa2 (VSS),
.vccd1 (VDD1V8),
.vccd2 (VDD1V8),
.vssd1 (VSS),
.vssd2 (VSS),
.clock (clock),
.gpio (gpio),
.mprj_io (mprj_io),
.resetb (RSTB)
spiflash #(
) spiflash (
.io2(), // not used
.io3() // not used
`default_nettype wire