verilog/rtl/soc_now_caravel_top.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
`define MPRJ_IO_PADS 38
/*
 *-------------------------------------------------------------
 *
 * user_project_wrapper
 *
 * This wrapper enumerates all of the pins available to the
 * user for the user project.
 *
 * An example user project is provided in this wrapper.  The
 * example should be removed and replaced with the actual
 * user project.
 *
 *-------------------------------------------------------------
 */

module soc_now_caravel_top(
`ifdef USE_POWER_PINS
    inout vccd1,	// User area 1 1.8V supply
    inout vssd1,	// User area 1 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-1:0] io_in,
    output [`MPRJ_IO_PADS-1:0] io_out,
    output [`MPRJ_IO_PADS-1:0] io_oeb,

    // Analog (direct connection to GPIO pad---use with caution)
    // Note that analog I/O is not available on the 7 lowest-numbered
    // GPIO pads, and so the analog_io indexing is offset from the
    // GPIO indexing by 7 (also upper 2 GPIOs do not have analog_io).
    inout [`MPRJ_IO_PADS-10:0] analog_io,

    // Independent clock (on independent integer divider)
    input   user_clock2,

    // User maskable interrupt signals
    output [2:0] user_irq
);

/*--------------------------------------*/
/* User project is instantiated  here   */
/*--------------------------------------*/

wire [31:0] gpio_i;
wire [31:0] gpio_o;
wire [31:0] gpio_oe; 

// pragramming uart
assign io_oeb[5] = 1'b1;
assign io_out[5] = 1'b0;

// gpio
assign io_out[37:6] = gpio_o;
assign gpio_i = io_in[37:6];
assign io_oeb[37:6] = ~gpio_oe;

Caravel_Top soc_top (
`ifdef USE_POWER_PINS
	.vccd1(vccd1),	// User area 1 1.8V power
	.vssd1(vssd1),	// User area 1 digital ground
`endif

  .clock (wb_clk_i),
  .reset (wb_rst_i),
  .io_gpio_o (gpio_o),
  .io_gpio_en_o (gpio_oe),
  .io_gpio_i (gpio_i),
  .io_rx_i (io_in[5]),
  .io_CLK_PER_BIT (la_data_in[15:0])
);

endmodule	// user_project_wrapper

`default_nettype wire