verilog/rtl/user_analog_proj_example.v

// 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 none

`include "comparator.v"
`include "comparator_bias.v"

/*
 * I/O mapping for analog
 *
 * mprj_io[37]  io_in/out/oeb/in_3v3[26]  ---                    ---
 * mprj_io[36]  io_in/out/oeb/in_3v3[25]  ---                    ---
 * mprj_io[35]  io_in/out/oeb/in_3v3[24]  gpio_analog/noesd[17]  ---
 * mprj_io[34]  io_in/out/oeb/in_3v3[23]  gpio_analog/noesd[16]  ---
 * mprj_io[33]  io_in/out/oeb/in_3v3[22]  gpio_analog/noesd[15]  ---
 * mprj_io[32]  io_in/out/oeb/in_3v3[21]  gpio_analog/noesd[14]  ---
 * mprj_io[31]  io_in/out/oeb/in_3v3[20]  gpio_analog/noesd[13]  ---
 * mprj_io[30]  io_in/out/oeb/in_3v3[19]  gpio_analog/noesd[12]  ---
 * mprj_io[29]  io_in/out/oeb/in_3v3[18]  gpio_analog/noesd[11]  ---
 * mprj_io[28]  io_in/out/oeb/in_3v3[17]  gpio_analog/noesd[10]  ---
 * mprj_io[27]  io_in/out/oeb/in_3v3[16]  gpio_analog/noesd[9]   ---
 * mprj_io[26]  io_in/out/oeb/in_3v3[15]  gpio_analog/noesd[8]   ---
 * mprj_io[25]  io_in/out/oeb/in_3v3[14]  gpio_analog/noesd[7]   ---
 * mprj_io[24]  ---                       ---                    user_analog[10]
 * mprj_io[23]  ---                       ---                    user_analog[9]
 * mprj_io[22]  ---                       ---                    user_analog[8]
 * mprj_io[21]  ---                       ---                    user_analog[7]
 * mprj_io[20]  ---                       ---                    user_analog[6]  clamp[2]
 * mprj_io[19]  ---                       ---                    user_analog[5]  clamp[1]
 * mprj_io[18]  ---                       ---                    user_analog[4]  clamp[0]
 * mprj_io[17]  ---                       ---                    user_analog[3]
 * mprj_io[16]  ---                       ---                    user_analog[2]
 * mprj_io[15]  ---                       ---                    user_analog[1]
 * mprj_io[14]  ---                       ---                    user_analog[0]
 * mprj_io[13]  io_in/out/oeb/in_3v3[13]  gpio_analog/noesd[6]   ---
 * mprj_io[12]  io_in/out/oeb/in_3v3[12]  gpio_analog/noesd[5]   ---
 * mprj_io[11]  io_in/out/oeb/in_3v3[11]  gpio_analog/noesd[4]   ---
 * mprj_io[10]  io_in/out/oeb/in_3v3[10]  gpio_analog/noesd[3]   ---
 * mprj_io[9]   io_in/out/oeb/in_3v3[9]   gpio_analog/noesd[2]   ---
 * mprj_io[8]   io_in/out/oeb/in_3v3[8]   gpio_analog/noesd[1]   ---
 * mprj_io[7]   io_in/out/oeb/in_3v3[7]   gpio_analog/noesd[0]   ---
 * mprj_io[6]   io_in/out/oeb/in_3v3[6]   ---                    ---
 * mprj_io[5]   io_in/out/oeb/in_3v3[5]   ---                    ---
 * mprj_io[4]   io_in/out/oeb/in_3v3[4]   ---                    ---
 * mprj_io[3]   io_in/out/oeb/in_3v3[3]   ---                    ---
 * mprj_io[2]   io_in/out/oeb/in_3v3[2]   ---                    ---
 * mprj_io[1]   io_in/out/oeb/in_3v3[1]   ---                    ---
 * mprj_io[0]   io_in/out/oeb/in_3v3[0]   ---                    ---
 *
 */

/*
 *----------------------------------------------------------------
 *
 * user_analog_proj_example
 *
 * This is an example of a (trivially simple) analog user project,
 * showing how the user project can connect to the I/O pads, both
 * the digital pads, the analog connection on the digital pads,
 * and the dedicated analog pins used as an additional power supply
 * input, with a connected ESD clamp.
 *
 * See the testbench in directory "mprj_por" for the example
 * program that drives this user project.
 *
 *----------------------------------------------------------------
 */

module user_analog_proj_example (
`ifdef USE_POWER_PINS
    inout vdda1,	// User area 1 3.3V supply
    inout vdda2,	// User area 2 3.3V supply
    inout vssa1,	// User area 1 analog ground
    inout vssa2,	// User area 2 analog ground
    inout vccd1,	// User area 1 1.8V supply
    inout vccd2,	// User area 2 1.8v supply
    inout vssd1,	// User area 1 digital ground
    inout vssd2,	// User area 2 digital ground
`endif

    // Wishbone Slave ports (WB MI A)
    input wb_clk_i,
    input wb_rst_i,
    input wbs_stb_i,
    input wbs_cyc_i,
    input wbs_we_i,
    input [3:0] wbs_sel_i,
    input [31:0] wbs_dat_i,
    input [31:0] wbs_adr_i,
    output wbs_ack_o,
    output [31:0] wbs_dat_o,

    // Logic Analyzer Signals
    input  [127:0] la_data_in,
    output [127:0] la_data_out,
    input  [127:0] la_oenb,

    // IOs
    input  [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_in,
    input  [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_in_3v3,
    output [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_out,
    output [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_oeb,

    // GPIO-analog
    inout [`MPRJ_IO_PADS-`ANALOG_PADS-10:0] gpio_analog,
    inout [`MPRJ_IO_PADS-`ANALOG_PADS-10:0] gpio_noesd,

    // Dedicated analog
    inout [`ANALOG_PADS-1:0] io_analog,
    inout [2:0] io_clamp_high,
    inout [2:0] io_clamp_low,

    // Clock
    input   user_clock2,

    // IRQ
    output [2:0] irq
);
    wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_in;
    wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_in_3v3;
    wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_out;
    wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] io_oeb;
    wire [`ANALOG_PADS-1:0] io_analog;

    // wire [31:0] rdata; 
    // wire [31:0] wdata;

    // wire valid;
    // wire [3:0] wstrb;

    wire analog0, analog2, analog3, vbn, vbp;

    // WB MI A
    // assign valid = wbs_cyc_i && wbs_stb_i; 
    // assign wstrb = wbs_sel_i & {4{wbs_we_i}};
    // assign wbs_dat_o = rdata;
    // assign wdata = wbs_dat_i;

    // IO --- unused (no need to connect to anything)
    // assign io_out[`MPRJ_IO_PADS-`ANALOG_PADS-1:17] = 0;
    // assign io_out[14:13] = 11'b0;
    // assign io_out[10:0] = 11'b0;

    // assign io_oeb[`MPRJ_IO_PADS-`ANALOG_PADS-1:17] = -1;
    // assign io_oeb[14:13] = 11'b1;
    // assign io_oeb[10:0] = 11'b1;

    // IO --- enable outputs on 11, 12, 15, and 16
    assign io_analog[0] = analog0;
    assign io_analog[2] = analog2;
    assign io_analog[3] = analog3;



    comparator comp1 (
	`ifdef USE_POWER_PINS
	    .VDD(vdda1),
	    .VSS(vssa1),
	`endif
	.VINP(analog2),	// 3.3V domain output
	.VINM(analog3),			// 1.8V domain output
	.VBN(vbn),
	.VBP(vbp),
	.VOUT(analog0)			// 1.8V domain output
    );



    comparator_bias compbias1 (
	`ifdef USE_POWER_PINS
	    .VDD(vdda1),
	    .VSS(vssa1),
	`endif
	.VBN(vbn),
	.VBP(vbp)
    );

endmodule

`default_nettype wire