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////////////////////////////////////////////////////////////////////// //// //// //// WISHBONE General-Purpose I/O //// //// //// //// This file is part of the GPIO project //// //// http://www.opencores.org/cores/gpio/ //// //// //// //// Description //// //// Implementation of GPIO IP core according to //// //// GPIO IP core specification document. //// //// //// //// To Do: //// //// Nothing //// //// //// //// Author(s): //// //// - Damjan Lampret, lampret@opencores.org //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Authors and OPENCORES.ORG //// //// //// //// This source file may be used and distributed without //// //// restriction provided that this copyright statement is not //// //// removed from the file and that any derivative work contains //// //// the original copyright notice and the associated disclaimer. //// //// //// //// This source file is free software; you can redistribute it //// //// and/or modify it under the terms of the GNU Lesser General //// //// Public License as published by the Free Software Foundation; //// //// either version 2.1 of the License, or (at your option) any //// //// later version. //// //// //// //// This source is distributed in the hope that it will be //// //// useful, but WITHOUT ANY WARRANTY; without even the implied //// //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// //// PURPOSE. See the GNU Lesser General Public License for more //// //// details. //// //// //// //// You should have received a copy of the GNU Lesser General //// //// Public License along with this source; if not, download it //// //// from http://www.opencores.org/lgpl.shtml //// //// //// ////////////////////////////////////////////////////////////////////// // // CVS Revision History // // $Log: not supported by cvs2svn $ // Revision 1.15 2003/11/10 23:21:22 gorand // bug fixed. all tests passed. // // Revision 1.14 2003/11/06 13:59:07 gorand // added support for 8-bit access to registers. // // Revision 1.13 2002/11/18 22:35:18 lampret // Bug fix. Interrupts were also asserted when condition was not met. // // Revision 1.12 2002/11/11 21:36:28 lampret // Added ifdef to remove mux from clk_pad_i if mux is not allowed. This also removes RGPIO_CTRL[NEC]. // // Revision 1.11 2002/03/13 20:56:28 lampret // Removed zero padding as per Avi Shamli suggestion. // // Revision 1.10 2002/03/13 20:47:57 lampret // Ports changed per Ran Aviram suggestions. // // Revision 1.9 2002/03/09 03:43:27 lampret // Interrupt is asserted only when an input changes (code patch by Jacob Gorban) // // Revision 1.8 2002/01/14 19:06:28 lampret // Changed registered WISHBONE outputs wb_ack_o/wb_err_o to follow WB specification. // // Revision 1.7 2001/12/25 17:21:21 lampret // Fixed two typos. // // Revision 1.6 2001/12/25 17:12:35 lampret // Added RGPIO_INTS. // // Revision 1.5 2001/12/12 20:35:53 lampret // Fixing style. // // Revision 1.4 2001/12/12 07:12:58 lampret // Fixed bug when wb_inta_o is registered (GPIO_WB_REGISTERED_OUTPUTS) // // Revision 1.3 2001/11/15 02:24:37 lampret // Added GPIO_REGISTERED_WB_OUTPUTS, GPIO_REGISTERED_IO_OUTPUTS and GPIO_NO_NEGEDGE_FLOPS. // // Revision 1.2 2001/10/31 02:26:51 lampret // Fixed wb_err_o. // // Revision 1.1 2001/09/18 18:49:07 lampret // Changed top level ptc into gpio_top. Changed defines.v into gpio_defines.v. // // Revision 1.1 2001/08/21 21:39:28 lampret // Changed directory structure, port names and drfines. // // Revision 1.2 2001/07/14 20:39:26 lampret // Better configurability. // // Revision 1.1 2001/06/05 07:45:26 lampret // Added initial RTL and test benches. There are still some issues with these files. // // // synopsys translate_off `include "timescale.v" // synopsys translate_on `include "gpio_defines.v" module gpio_top( // WISHBONE Interface wb_clk_i, wb_rst_i, wb_cyc_i, wb_adr_i, wb_dat_i, wb_sel_i, wb_we_i, wb_stb_i, wb_dat_o, wb_ack_o, wb_err_o, wb_inta_o, // Auxiliary inputs interface aux_i, // External GPIO Interface ext_pad_i, clk_pad_i, ext_pad_o, ext_padoen_o ); parameter dw = 32; parameter aw = `GPIO_ADDRHH+1; parameter gw = `GPIO_IOS; // // WISHBONE Interface // input wb_clk_i; // Clock input wb_rst_i; // Reset input wb_cyc_i; // cycle valid input input [aw-1:0] wb_adr_i; // address bus inputs input [dw-1:0] wb_dat_i; // input data bus input [3:0] wb_sel_i; // byte select inputs input wb_we_i; // indicates write transfer input wb_stb_i; // strobe input output [dw-1:0] wb_dat_o; // output data bus output wb_ack_o; // normal termination output wb_err_o; // termination w/ error output wb_inta_o; // Interrupt request output // Auxiliary Inputs Interface input [gw-1:0] aux_i; // Auxiliary inputs // // External GPIO Interface // input [gw-1:0] ext_pad_i; // GPIO Inputs input clk_pad_i; // GPIO Eclk output [gw-1:0] ext_pad_o; // GPIO Outputs output [gw-1:0] ext_padoen_o; // GPIO output drivers enables `ifdef GPIO_IMPLEMENTED // // GPIO Input Register (or no register) // `ifdef GPIO_RGPIO_IN reg [gw-1:0] rgpio_in; // RGPIO_IN register `else wire [gw-1:0] rgpio_in; // No register `endif // // GPIO Output Register (or no register) // `ifdef GPIO_RGPIO_OUT reg [gw-1:0] rgpio_out; // RGPIO_OUT register `else wire [gw-1:0] rgpio_out; // No register `endif // // GPIO Output Driver Enable Register (or no register) // `ifdef GPIO_RGPIO_OE reg [gw-1:0] rgpio_oe; // RGPIO_OE register `else wire [gw-1:0] rgpio_oe; // No register `endif // // GPIO Interrupt Enable Register (or no register) // `ifdef GPIO_RGPIO_INTE reg [gw-1:0] rgpio_inte; // RGPIO_INTE register `else wire [gw-1:0] rgpio_inte; // No register `endif // // GPIO Positive edge Triggered Register (or no register) // `ifdef GPIO_RGPIO_PTRIG reg [gw-1:0] rgpio_ptrig; // RGPIO_PTRIG register `else wire [gw-1:0] rgpio_ptrig; // No register `endif // // GPIO Auxiliary select Register (or no register) // `ifdef GPIO_RGPIO_AUX reg [gw-1:0] rgpio_aux; // RGPIO_AUX register `else wire [gw-1:0] rgpio_aux; // No register `endif // // GPIO Control Register (or no register) // `ifdef GPIO_RGPIO_CTRL reg [1:0] rgpio_ctrl; // RGPIO_CTRL register `else wire [1:0] rgpio_ctrl; // No register `endif // // GPIO Interrupt Status Register (or no register) // `ifdef GPIO_RGPIO_INTS reg [gw-1:0] rgpio_ints; // RGPIO_INTS register `else wire [gw-1:0] rgpio_ints; // No register `endif // // GPIO Enable Clock Register (or no register) // `ifdef GPIO_RGPIO_ECLK reg [gw-1:0] rgpio_eclk; // RGPIO_ECLK register `else wire [gw-1:0] rgpio_eclk; // No register `endif // // GPIO Active Negative Edge Register (or no register) // `ifdef GPIO_RGPIO_NEC reg [gw-1:0] rgpio_nec; // RGPIO_NEC register `else wire [gw-1:0] rgpio_nec; // No register `endif // // Internal wires & regs // wire rgpio_out_sel; // RGPIO_OUT select wire rgpio_oe_sel; // RGPIO_OE select wire rgpio_inte_sel; // RGPIO_INTE select wire rgpio_ptrig_sel;// RGPIO_PTRIG select wire rgpio_aux_sel; // RGPIO_AUX select wire rgpio_ctrl_sel; // RGPIO_CTRL select wire rgpio_ints_sel; // RGPIO_INTS select wire rgpio_eclk_sel ; wire rgpio_nec_sel ; wire full_decoding; // Full address decoding qualification wire [gw-1:0] in_muxed; // Muxed inputs wire wb_ack; // WB Acknowledge wire wb_err; // WB Error wire wb_inta; // WB Interrupt reg [dw-1:0] wb_dat; // WB Data out `ifdef GPIO_REGISTERED_WB_OUTPUTS reg wb_ack_o; // WB Acknowledge reg wb_err_o; // WB Error reg wb_inta_o; // WB Interrupt reg [dw-1:0] wb_dat_o; // WB Data out `endif wire [gw-1:0] out_pad; // GPIO Outputs `ifdef GPIO_REGISTERED_IO_OUTPUTS reg [gw-1:0] ext_pad_o; // GPIO Outputs `endif wire [gw-1:0] extc_in; // Muxed inputs sampled by external clock wire [gw-1:0] pext_clk; // External clock for posedge flops reg [gw-1:0] pextc_sampled; // Posedge external clock sampled inputs `ifdef GPIO_NO_NEGEDGE_FLOPS `else reg [gw-1:0] nextc_sampled; // Negedge external clock sampled inputs `endif // // All WISHBONE transfer terminations are successful except when: // a) full address decoding is enabled and address doesn't match // any of the GPIO registers // b) wb_sel_i evaluation is enabled and one of the wb_sel_i inputs is zero // // // WB Acknowledge // assign wb_ack = wb_cyc_i & wb_stb_i & !wb_err_o; // // Optional registration of WB Ack // `ifdef GPIO_REGISTERED_WB_OUTPUTS always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) wb_ack_o <= #1 1'b0; else wb_ack_o <= #1 wb_ack & ~wb_ack_o & (!wb_err) ; `else assign wb_ack_o = wb_ack; `endif // // WB Error // `ifdef GPIO_FULL_DECODE `ifdef GPIO_STRICT_32BIT_ACCESS assign wb_err = wb_cyc_i & wb_stb_i & (!full_decoding | (wb_sel_i != 4'b1111)); `else assign wb_err = wb_cyc_i & wb_stb_i & !full_decoding; `endif `else `ifdef GPIO_STRICT_32BIT_ACCESS assign wb_err = wb_cyc_i & wb_stb_i & (wb_sel_i != 4'b1111); `else assign wb_err = 1'b0; `endif `endif // // Optional registration of WB error // `ifdef GPIO_REGISTERED_WB_OUTPUTS always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) wb_err_o <= #1 1'b0; else wb_err_o <= #1 wb_err & ~wb_err_o; `else assign wb_err_o = wb_err; `endif // // Full address decoder // `ifdef GPIO_FULL_DECODE assign full_decoding = (wb_adr_i[`GPIO_ADDRHH:`GPIO_ADDRHL] == {`GPIO_ADDRHH-`GPIO_ADDRHL+1{1'b0}}) & (wb_adr_i[`GPIO_ADDRLH:`GPIO_ADDRLL] == {`GPIO_ADDRLH-`GPIO_ADDRLL+1{1'b0}}); `else assign full_decoding = 1'b1; `endif // // GPIO registers address decoder // assign rgpio_out_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_OUT) & full_decoding; assign rgpio_oe_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_OE) & full_decoding; assign rgpio_inte_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_INTE) & full_decoding; assign rgpio_ptrig_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_PTRIG) & full_decoding; assign rgpio_aux_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_AUX) & full_decoding; assign rgpio_ctrl_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_CTRL) & full_decoding; assign rgpio_ints_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_INTS) & full_decoding; assign rgpio_eclk_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_ECLK) & full_decoding; assign rgpio_nec_sel = wb_cyc_i & wb_stb_i & (wb_adr_i[`GPIO_OFS_BITS] == `GPIO_RGPIO_NEC) & full_decoding; // // Write to RGPIO_CTRL or update of RGPIO_CTRL[INT] bit // `ifdef GPIO_RGPIO_CTRL always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_ctrl <= #1 2'b0; else if (rgpio_ctrl_sel && wb_we_i) rgpio_ctrl <= #1 wb_dat_i[1:0]; else if (rgpio_ctrl[`GPIO_RGPIO_CTRL_INTE]) rgpio_ctrl[`GPIO_RGPIO_CTRL_INTS] <= #1 rgpio_ctrl[`GPIO_RGPIO_CTRL_INTS] | wb_inta_o; `else assign rgpio_ctrl = 2'h01; // RGPIO_CTRL[EN] = 1 `endif // // Write to RGPIO_OUT // `ifdef GPIO_RGPIO_OUT always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_out <= #1 {gw{1'b0}}; else if (rgpio_out_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_out <= #1 wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_out [gw-1:24] <= #1 wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_out [23:16] <= #1 wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_out [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_out [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_out [gw-1:16] <= #1 wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_out [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_out [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_out [gw-1:8] <= #1 wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_out [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_out [gw-1:0] <= #1 wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_out = `GPIO_DEF_RGPIO_OUT; // RGPIO_OUT = 0x0 `endif // // Write to RGPIO_OE. Bits in RGPIO_OE are stored inverted. // `ifdef GPIO_RGPIO_OE always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_oe <= #1 {gw{1'b0}}; else if (rgpio_oe_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_oe <= #1 ~wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_oe [gw-1:24] <= #1 ~wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_oe [23:16] <= #1 ~wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_oe [15:8] <= #1 ~wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_oe [7:0] <= #1 ~wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_oe [gw-1:16] <= #1 ~wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_oe [15:8] <= #1 ~wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_oe [7:0] <= #1 ~wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_oe [gw-1:8] <= #1 ~wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_oe [7:0] <= #1 ~wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_oe [gw-1:0] <= #1 ~wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_oe = `GPIO_DEF_RPGIO_OE; // RGPIO_OE = 0x0 `endif // // Write to RGPIO_INTE // `ifdef GPIO_RGPIO_INTE always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_inte <= #1 {gw{1'b0}}; else if (rgpio_inte_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_inte <= #1 wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_inte [gw-1:24] <= #1 wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_inte [23:16] <= #1 wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_inte [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_inte [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_inte [gw-1:16] <= #1 wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_inte [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_inte [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_inte [gw-1:8] <= #1 wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_inte [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_inte [gw-1:0] <= #1 wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_inte = `GPIO_DEF_RPGIO_INTE; // RGPIO_INTE = 0x0 `endif // // Write to RGPIO_PTRIG // `ifdef GPIO_RGPIO_PTRIG always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_ptrig <= #1 {gw{1'b0}}; else if (rgpio_ptrig_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_ptrig <= #1 wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_ptrig [gw-1:24] <= #1 wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_ptrig [23:16] <= #1 wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_ptrig [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_ptrig [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_ptrig [gw-1:16] <= #1 wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_ptrig [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_ptrig [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_ptrig [gw-1:8] <= #1 wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_ptrig [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_ptrig [gw-1:0] <= #1 wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_ptrig = `GPIO_DEF_RPGIO_PTRIG; // RGPIO_PTRIG = 0x0 `endif // // Write to RGPIO_AUX // `ifdef GPIO_RGPIO_AUX always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_aux <= #1 {gw{1'b0}}; else if (rgpio_aux_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_aux <= #1 wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_aux [gw-1:24] <= #1 wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_aux [23:16] <= #1 wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_aux [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_aux [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_aux [gw-1:16] <= #1 wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_aux [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_aux [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_aux [gw-1:8] <= #1 wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_aux [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_aux [gw-1:0] <= #1 wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_aux = `GPIO_DEF_RPGIO_AUX; // RGPIO_AUX = 0x0 `endif // // Write to RGPIO_ECLK // `ifdef GPIO_RGPIO_ECLK always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_eclk <= #1 {gw{1'b0}}; else if (rgpio_eclk_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_eclk <= #1 wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_eclk [gw-1:24] <= #1 wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_eclk [23:16] <= #1 wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_eclk [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_eclk [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_eclk [gw-1:16] <= #1 wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_eclk [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_eclk [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_eclk [gw-1:8] <= #1 wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_eclk [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_eclk [gw-1:0] <= #1 wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_eclk = `GPIO_DEF_RPGIO_ECLK; // RGPIO_ECLK = 0x0 `endif // // Write to RGPIO_NEC // `ifdef GPIO_RGPIO_NEC always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_nec <= #1 {gw{1'b0}}; else if (rgpio_nec_sel && wb_we_i) begin `ifdef GPIO_STRICT_32BIT_ACCESS rgpio_nec <= #1 wb_dat_i[gw-1:0]; `endif `ifdef GPIO_WB_BYTES4 if ( wb_sel_i [3] == 1'b1 ) rgpio_nec [gw-1:24] <= #1 wb_dat_i [gw-1:24] ; if ( wb_sel_i [2] == 1'b1 ) rgpio_nec [23:16] <= #1 wb_dat_i [23:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_nec [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_nec [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES3 if ( wb_sel_i [2] == 1'b1 ) rgpio_nec [gw-1:16] <= #1 wb_dat_i [gw-1:16] ; if ( wb_sel_i [1] == 1'b1 ) rgpio_nec [15:8] <= #1 wb_dat_i [15:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_nec [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES2 if ( wb_sel_i [1] == 1'b1 ) rgpio_nec [gw-1:8] <= #1 wb_dat_i [gw-1:8] ; if ( wb_sel_i [0] == 1'b1 ) rgpio_nec [7:0] <= #1 wb_dat_i [7:0] ; `endif `ifdef GPIO_WB_BYTES1 if ( wb_sel_i [0] == 1'b1 ) rgpio_nec [gw-1:0] <= #1 wb_dat_i [gw-1:0] ; `endif end `else assign rgpio_nec = `GPIO_DEF_RPGIO_NEC; // RGPIO_NEC = 0x0 `endif // // Latch into RGPIO_IN // `ifdef GPIO_RGPIO_IN always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_in <= #1 {gw{1'b0}}; else rgpio_in <= #1 in_muxed; `else assign rgpio_in = in_muxed; `endif // // Mux inputs directly from input pads with inputs sampled by external clock // //assign in_muxed = rgpio_ctrl[`GPIO_RGPIO_CTRL_ECLK] ? extc_in : ext_pad_i; `ifdef GPIO_LINES32 assign in_muxed [31] = rgpio_eclk [31] ? extc_in[31] : ext_pad_i[31] ; `endif `ifdef GPIO_LINES31 assign in_muxed [30] = rgpio_eclk [30] ? extc_in[30] : ext_pad_i[30] ; `endif `ifdef GPIO_LINES30 assign in_muxed [29] = rgpio_eclk [29] ? extc_in[29] : ext_pad_i[29] ; `endif `ifdef GPIO_LINES29 assign in_muxed [28] = rgpio_eclk [28] ? extc_in[28] : ext_pad_i[28] ; `endif `ifdef GPIO_LINES28 assign in_muxed [27] = rgpio_eclk [27] ? extc_in[27] : ext_pad_i[27] ; `endif `ifdef GPIO_LINES27 assign in_muxed [26] = rgpio_eclk [26] ? extc_in[26] : ext_pad_i[26] ; `endif `ifdef GPIO_LINES26 assign in_muxed [25] = rgpio_eclk [25] ? extc_in[25] : ext_pad_i[25] ; `endif `ifdef GPIO_LINES25 assign in_muxed [24] = rgpio_eclk [24] ? extc_in[24] : ext_pad_i[24] ; `endif `ifdef GPIO_LINES24 assign in_muxed [23] = rgpio_eclk [23] ? extc_in[23] : ext_pad_i[23] ; `endif `ifdef GPIO_LINES23 assign in_muxed [22] = rgpio_eclk [22] ? extc_in[22] : ext_pad_i[22] ; `endif `ifdef GPIO_LINES22 assign in_muxed [21] = rgpio_eclk [21] ? extc_in[21] : ext_pad_i[21] ; `endif `ifdef GPIO_LINES21 assign in_muxed [20] = rgpio_eclk [20] ? extc_in[20] : ext_pad_i[20] ; `endif `ifdef GPIO_LINES20 assign in_muxed [19] = rgpio_eclk [19] ? extc_in[19] : ext_pad_i[19] ; `endif `ifdef GPIO_LINES19 assign in_muxed [18] = rgpio_eclk [18] ? extc_in[18] : ext_pad_i[18] ; `endif `ifdef GPIO_LINES18 assign in_muxed [17] = rgpio_eclk [17] ? extc_in[17] : ext_pad_i[17] ; `endif `ifdef GPIO_LINES17 assign in_muxed [16] = rgpio_eclk [16] ? extc_in[16] : ext_pad_i[16] ; `endif `ifdef GPIO_LINES16 assign in_muxed [15] = rgpio_eclk [15] ? extc_in[15] : ext_pad_i[15] ; `endif `ifdef GPIO_LINES15 assign in_muxed [14] = rgpio_eclk [14] ? extc_in[14] : ext_pad_i[14] ; `endif `ifdef GPIO_LINES14 assign in_muxed [13] = rgpio_eclk [13] ? extc_in[13] : ext_pad_i[13] ; `endif `ifdef GPIO_LINES13 assign in_muxed [12] = rgpio_eclk [12] ? extc_in[12] : ext_pad_i[12] ; `endif `ifdef GPIO_LINES12 assign in_muxed [11] = rgpio_eclk [11] ? extc_in[11] : ext_pad_i[11] ; `endif `ifdef GPIO_LINES11 assign in_muxed [10] = rgpio_eclk [10] ? extc_in[10] : ext_pad_i[10] ; `endif `ifdef GPIO_LINES10 assign in_muxed [9] = rgpio_eclk [9] ? extc_in[9] : ext_pad_i[9] ; `endif `ifdef GPIO_LINES9 assign in_muxed [8] = rgpio_eclk [8] ? extc_in[8] : ext_pad_i[8] ; `endif `ifdef GPIO_LINES8 assign in_muxed [7] = rgpio_eclk [7] ? extc_in[7] : ext_pad_i[7] ; `endif `ifdef GPIO_LINES7 assign in_muxed [6] = rgpio_eclk [6] ? extc_in[6] : ext_pad_i[6] ; `endif `ifdef GPIO_LINES6 assign in_muxed [5] = rgpio_eclk [5] ? extc_in[5] : ext_pad_i[5] ; `endif `ifdef GPIO_LINES5 assign in_muxed [4] = rgpio_eclk [4] ? extc_in[4] : ext_pad_i[4] ; `endif `ifdef GPIO_LINES4 assign in_muxed [3] = rgpio_eclk [3] ? extc_in[3] : ext_pad_i[3] ; `endif `ifdef GPIO_LINES3 assign in_muxed [2] = rgpio_eclk [2] ? extc_in[2] : ext_pad_i[2] ; `endif `ifdef GPIO_LINES2 assign in_muxed [1] = rgpio_eclk [1] ? extc_in[1] : ext_pad_i[1] ; `endif `ifdef GPIO_LINES1 assign in_muxed [0] = rgpio_eclk [0] ? extc_in[0] : ext_pad_i[0] ; `endif // // Posedge pext_clk is inverted by NEC bit if negedge flops are not allowed. // If negedge flops are allowed, pext_clk only clocks posedge flops. // `ifdef GPIO_NO_NEGEDGE_FLOPS `ifdef GPIO_NO_CLKPAD_LOGIC assign pext_clk = {gw{clk_pad_i}}; `else //assign pext_clk = rgpio_ctrl[`GPIO_RGPIO_CTRL_NEC] ? ~clk_pad_i : clk_pad_i; `ifdef GPIO_LINES32 assign pext_clk [31] = rgpio_nec [31] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES31 assign pext_clk [30] = rgpio_nec [30] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES30 assign pext_clk [29] = rgpio_nec [29] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES29 assign pext_clk [28] = rgpio_nec [28] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES28 assign pext_clk [27] = rgpio_nec [27] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES27 assign pext_clk [26] = rgpio_nec [26] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES26 assign pext_clk [25] = rgpio_nec [25] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES25 assign pext_clk [24] = rgpio_nec [24] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES24 assign pext_clk [23] = rgpio_nec [23] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES23 assign pext_clk [22] = rgpio_nec [22] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES22 assign pext_clk [21] = rgpio_nec [21] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES21 assign pext_clk [20] = rgpio_nec [20] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES20 assign pext_clk [19] = rgpio_nec [19] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES19 assign pext_clk [18] = rgpio_nec [18] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES18 assign pext_clk [17] = rgpio_nec [17] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES17 assign pext_clk [16] = rgpio_nec [16] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES16 assign pext_clk [15] = rgpio_nec [15] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES15 assign pext_clk [14] = rgpio_nec [14] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES14 assign pext_clk [13] = rgpio_nec [13] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES13 assign pext_clk [12] = rgpio_nec [12] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES12 assign pext_clk [11] = rgpio_nec [11] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES11 assign pext_clk [10] = rgpio_nec [10] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES10 assign pext_clk [9] = rgpio_nec [9] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES9 assign pext_clk [8] = rgpio_nec [8] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES8 assign pext_clk [7] = rgpio_nec [7] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES7 assign pext_clk [6] = rgpio_nec [6] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES6 assign pext_clk [5] = rgpio_nec [5] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES5 assign pext_clk [4] = rgpio_nec [4] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES4 assign pext_clk [3] = rgpio_nec [3] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES3 assign pext_clk [2] = rgpio_nec [2] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES2 assign pext_clk [1] = rgpio_nec [1] ? ~clk_pad_i : clk_pad_i ; `endif `ifdef GPIO_LINES1 assign pext_clk [0] = rgpio_nec [0] ? ~clk_pad_i : clk_pad_i ; `endif `endif `else assign pext_clk = {gw{clk_pad_i}}; `endif // // If negedge flops are allowed, ext_in is mux of negedge and posedge external clocked flops. // `ifdef GPIO_NO_NEGEDGE_FLOPS assign extc_in = pextc_sampled; `else //assign extc_in = rgpio_ctrl[`GPIO_RGPIO_CTRL_NEC] ? nextc_sampled : pextc_sampled; `ifdef GPIO_LINES32 assign extc_in [31] = rgpio_nec [31] ? nextc_sampled[31] : pextc_sampled[31] ; `endif `ifdef GPIO_LINES31 assign extc_in [30] = rgpio_nec [30] ? nextc_sampled[30] : pextc_sampled[30] ; `endif `ifdef GPIO_LINES30 assign extc_in [29] = rgpio_nec [29] ? nextc_sampled[29] : pextc_sampled[29] ; `endif `ifdef GPIO_LINES29 assign extc_in [28] = rgpio_nec [28] ? nextc_sampled[28] : pextc_sampled[28] ; `endif `ifdef GPIO_LINES28 assign extc_in [27] = rgpio_nec [27] ? nextc_sampled[27] : pextc_sampled[27] ; `endif `ifdef GPIO_LINES27 assign extc_in [26] = rgpio_nec [26] ? nextc_sampled[26] : pextc_sampled[26] ; `endif `ifdef GPIO_LINES26 assign extc_in [25] = rgpio_nec [25] ? nextc_sampled[25] : pextc_sampled[25] ; `endif `ifdef GPIO_LINES25 assign extc_in [24] = rgpio_nec [24] ? nextc_sampled[24] : pextc_sampled[24] ; `endif `ifdef GPIO_LINES24 assign extc_in [23] = rgpio_nec [23] ? nextc_sampled[23] : pextc_sampled[23] ; `endif `ifdef GPIO_LINES23 assign extc_in [22] = rgpio_nec [22] ? nextc_sampled[22] : pextc_sampled[22] ; `endif `ifdef GPIO_LINES22 assign extc_in [21] = rgpio_nec [21] ? nextc_sampled[21] : pextc_sampled[21] ; `endif `ifdef GPIO_LINES21 assign extc_in [20] = rgpio_nec [20] ? nextc_sampled[20] : pextc_sampled[20] ; `endif `ifdef GPIO_LINES20 assign extc_in [19] = rgpio_nec [19] ? nextc_sampled[19] : pextc_sampled[19] ; `endif `ifdef GPIO_LINES19 assign extc_in [18] = rgpio_nec [18] ? nextc_sampled[18] : pextc_sampled[18] ; `endif `ifdef GPIO_LINES18 assign extc_in [17] = rgpio_nec [17] ? nextc_sampled[17] : pextc_sampled[17] ; `endif `ifdef GPIO_LINES17 assign extc_in [16] = rgpio_nec [16] ? nextc_sampled[16] : pextc_sampled[16] ; `endif `ifdef GPIO_LINES16 assign extc_in [15] = rgpio_nec [15] ? nextc_sampled[15] : pextc_sampled[15] ; `endif `ifdef GPIO_LINES15 assign extc_in [14] = rgpio_nec [14] ? nextc_sampled[14] : pextc_sampled[14] ; `endif `ifdef GPIO_LINES14 assign extc_in [13] = rgpio_nec [13] ? nextc_sampled[13] : pextc_sampled[13] ; `endif `ifdef GPIO_LINES13 assign extc_in [12] = rgpio_nec [12] ? nextc_sampled[12] : pextc_sampled[12] ; `endif `ifdef GPIO_LINES12 assign extc_in [11] = rgpio_nec [11] ? nextc_sampled[11] : pextc_sampled[11] ; `endif `ifdef GPIO_LINES11 assign extc_in [10] = rgpio_nec [10] ? nextc_sampled[10] : pextc_sampled[10] ; `endif `ifdef GPIO_LINES10 assign extc_in [9] = rgpio_nec [9] ? nextc_sampled[9] : pextc_sampled[9] ; `endif `ifdef GPIO_LINES9 assign extc_in [8] = rgpio_nec [8] ? nextc_sampled[8] : pextc_sampled[8] ; `endif `ifdef GPIO_LINES8 assign extc_in [7] = rgpio_nec [7] ? nextc_sampled[7] : pextc_sampled[7] ; `endif `ifdef GPIO_LINES7 assign extc_in [6] = rgpio_nec [6] ? nextc_sampled[6] : pextc_sampled[6] ; `endif `ifdef GPIO_LINES6 assign extc_in [5] = rgpio_nec [5] ? nextc_sampled[5] : pextc_sampled[5] ; `endif `ifdef GPIO_LINES5 assign extc_in [4] = rgpio_nec [4] ? nextc_sampled[4] : pextc_sampled[4] ; `endif `ifdef GPIO_LINES4 assign extc_in [3] = rgpio_nec [3] ? nextc_sampled[3] : pextc_sampled[3] ; `endif `ifdef GPIO_LINES3 assign extc_in [2] = rgpio_nec [2] ? nextc_sampled[2] : pextc_sampled[2] ; `endif `ifdef GPIO_LINES2 assign extc_in [1] = rgpio_nec [1] ? nextc_sampled[1] : pextc_sampled[1] ; `endif `ifdef GPIO_LINES1 assign extc_in [0] = rgpio_nec [0] ? nextc_sampled[0] : pextc_sampled[0] ; `endif `endif // // Latch using posedge external clock // `ifdef GPIO_LINES32 always @(posedge pext_clk[31] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[31] <= #1 1'b0; else pextc_sampled[31] <= #1 ext_pad_i[31]; `endif `ifdef GPIO_LINES31 always @(posedge pext_clk[30] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[30] <= #1 1'b0; else pextc_sampled[30] <= #1 ext_pad_i[30]; `endif `ifdef GPIO_LINES30 always @(posedge pext_clk[29] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[29] <= #1 1'b0; else pextc_sampled[29] <= #1 ext_pad_i[29]; `endif `ifdef GPIO_LINES29 always @(posedge pext_clk[28] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[28] <= #1 1'b0; else pextc_sampled[28] <= #1 ext_pad_i[28]; `endif `ifdef GPIO_LINES28 always @(posedge pext_clk[27] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[27] <= #1 1'b0; else pextc_sampled[27] <= #1 ext_pad_i[27]; `endif `ifdef GPIO_LINES27 always @(posedge pext_clk[26] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[26] <= #1 1'b0; else pextc_sampled[26] <= #1 ext_pad_i[26]; `endif `ifdef GPIO_LINES26 always @(posedge pext_clk[25] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[25] <= #1 1'b0; else pextc_sampled[25] <= #1 ext_pad_i[25]; `endif `ifdef GPIO_LINES25 always @(posedge pext_clk[24] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[24] <= #1 1'b0; else pextc_sampled[24] <= #1 ext_pad_i[24]; `endif `ifdef GPIO_LINES24 always @(posedge pext_clk[23] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[23] <= #1 1'b0; else pextc_sampled[23] <= #1 ext_pad_i[23]; `endif `ifdef GPIO_LINES23 always @(posedge pext_clk[22] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[22] <= #1 1'b0; else pextc_sampled[22] <= #1 ext_pad_i[22]; `endif `ifdef GPIO_LINES22 always @(posedge pext_clk[21] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[21] <= #1 1'b0; else pextc_sampled[21] <= #1 ext_pad_i[21]; `endif `ifdef GPIO_LINES21 always @(posedge pext_clk[20] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[20] <= #1 1'b0; else pextc_sampled[20] <= #1 ext_pad_i[20]; `endif `ifdef GPIO_LINES20 always @(posedge pext_clk[19] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[19] <= #1 1'b0; else pextc_sampled[19] <= #1 ext_pad_i[19]; `endif `ifdef GPIO_LINES19 always @(posedge pext_clk[18] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[18] <= #1 1'b0; else pextc_sampled[18] <= #1 ext_pad_i[18]; `endif `ifdef GPIO_LINES18 always @(posedge pext_clk[17] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[17] <= #1 1'b0; else pextc_sampled[17] <= #1 ext_pad_i[17]; `endif `ifdef GPIO_LINES17 always @(posedge pext_clk[16] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[16] <= #1 1'b0; else pextc_sampled[16] <= #1 ext_pad_i[16]; `endif `ifdef GPIO_LINES16 always @(posedge pext_clk[15] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[15] <= #1 1'b0; else pextc_sampled[15] <= #1 ext_pad_i[15]; `endif `ifdef GPIO_LINES15 always @(posedge pext_clk[14] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[14] <= #1 1'b0; else pextc_sampled[14] <= #1 ext_pad_i[14]; `endif `ifdef GPIO_LINES14 always @(posedge pext_clk[13] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[13] <= #1 1'b0; else pextc_sampled[13] <= #1 ext_pad_i[13]; `endif `ifdef GPIO_LINES13 always @(posedge pext_clk[12] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[12] <= #1 1'b0; else pextc_sampled[12] <= #1 ext_pad_i[12]; `endif `ifdef GPIO_LINES12 always @(posedge pext_clk[11] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[11] <= #1 1'b0; else pextc_sampled[11] <= #1 ext_pad_i[11]; `endif `ifdef GPIO_LINES11 always @(posedge pext_clk[10] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[10] <= #1 1'b0; else pextc_sampled[10] <= #1 ext_pad_i[10]; `endif `ifdef GPIO_LINES10 always @(posedge pext_clk[9] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[9] <= #1 1'b0; else pextc_sampled[9] <= #1 ext_pad_i[9]; `endif `ifdef GPIO_LINES9 always @(posedge pext_clk[8] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[8] <= #1 1'b0; else pextc_sampled[8] <= #1 ext_pad_i[8]; `endif `ifdef GPIO_LINES8 always @(posedge pext_clk[7] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[7] <= #1 1'b0; else pextc_sampled[7] <= #1 ext_pad_i[7]; `endif `ifdef GPIO_LINES7 always @(posedge pext_clk[6] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[6] <= #1 1'b0; else pextc_sampled[6] <= #1 ext_pad_i[6]; `endif `ifdef GPIO_LINES6 always @(posedge pext_clk[5] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[5] <= #1 1'b0; else pextc_sampled[5] <= #1 ext_pad_i[5]; `endif `ifdef GPIO_LINES5 always @(posedge pext_clk[4] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[4] <= #1 1'b0; else pextc_sampled[4] <= #1 ext_pad_i[4]; `endif `ifdef GPIO_LINES4 always @(posedge pext_clk[3] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[3] <= #1 1'b0; else pextc_sampled[3] <= #1 ext_pad_i[3]; `endif `ifdef GPIO_LINES3 always @(posedge pext_clk[2] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[2] <= #1 1'b0; else pextc_sampled[2] <= #1 ext_pad_i[2]; `endif `ifdef GPIO_LINES2 always @(posedge pext_clk[1] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[1] <= #1 1'b0; else pextc_sampled[1] <= #1 ext_pad_i[1]; `endif `ifdef GPIO_LINES1 always @(posedge pext_clk[0] or posedge wb_rst_i) if (wb_rst_i) pextc_sampled[0] <= #1 1'b0; else pextc_sampled[0] <= #1 ext_pad_i[0]; `endif // // Latch using negedge external clock // `ifdef GPIO_NO_NEGEDGE_FLOPS `else always @(negedge clk_pad_i or posedge wb_rst_i) if (wb_rst_i) nextc_sampled <= #1 {gw{1'b0}}; else nextc_sampled <= #1 ext_pad_i; `endif // // Mux all registers when doing a read of GPIO registers // always @(wb_adr_i or rgpio_in or rgpio_out or rgpio_oe or rgpio_inte or rgpio_ptrig or rgpio_aux or rgpio_ctrl or rgpio_ints or rgpio_eclk or rgpio_nec) case (wb_adr_i[`GPIO_OFS_BITS]) // synopsys full_case parallel_case `ifdef GPIO_READREGS `GPIO_RGPIO_OUT: begin wb_dat[dw-1:0] = rgpio_out; end `GPIO_RGPIO_OE: begin wb_dat[dw-1:0] = ~rgpio_oe; end `GPIO_RGPIO_INTE: begin wb_dat[dw-1:0] = rgpio_inte; end `GPIO_RGPIO_PTRIG: begin wb_dat[dw-1:0] = rgpio_ptrig; end `GPIO_RGPIO_NEC: begin wb_dat[dw-1:0] = rgpio_nec; end `GPIO_RGPIO_ECLK: begin wb_dat[dw-1:0] = rgpio_eclk; end `GPIO_RGPIO_AUX: begin wb_dat[dw-1:0] = rgpio_aux; end `GPIO_RGPIO_CTRL: begin wb_dat[1:0] = rgpio_ctrl; wb_dat[dw-1:2] = {dw-2{1'b0}}; end `endif `GPIO_RGPIO_INTS: begin wb_dat[dw-1:0] = rgpio_ints; end default: begin wb_dat[dw-1:0] = rgpio_in; end endcase // // WB data output // `ifdef GPIO_REGISTERED_WB_OUTPUTS always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) wb_dat_o <= #1 {dw{1'b0}}; else wb_dat_o <= #1 wb_dat; `else assign wb_dat_o = wb_dat; `endif // // RGPIO_INTS // `ifdef GPIO_RGPIO_INTS always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) rgpio_ints <= #1 {gw{1'b0}}; else if (rgpio_ints_sel && wb_we_i) rgpio_ints <= #1 wb_dat_i[gw-1:0]; else if (rgpio_ctrl[`GPIO_RGPIO_CTRL_INTE]) rgpio_ints <= #1 (rgpio_ints | ((ext_pad_i ^ rgpio_in) & ~(ext_pad_i ^ rgpio_ptrig)) & rgpio_inte); `else assign rgpio_ints = (rgpio_ints | ((ext_pad_i ^ rgpio_in) & ~(ext_pad_i ^ rgpio_ptrig)) & rgpio_inte); `endif // // Generate interrupt request // assign wb_inta = |rgpio_ints ? rgpio_ctrl[`GPIO_RGPIO_CTRL_INTE] : 1'b0; // // Optional registration of WB interrupt // `ifdef GPIO_REGISTERED_WB_OUTPUTS always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) wb_inta_o <= #1 1'b0; else wb_inta_o <= #1 wb_inta; `else assign wb_inta_o = wb_inta; `endif // // Output enables are RGPIO_OE bits // assign ext_padoen_o = rgpio_oe; // // Generate GPIO outputs // assign out_pad = rgpio_out & ~rgpio_aux | aux_i & rgpio_aux; // // Optional registration of GPIO outputs // `ifdef GPIO_REGISTERED_IO_OUTPUTS always @(posedge wb_clk_i or posedge wb_rst_i) if (wb_rst_i) ext_pad_o <= #1 {gw{1'b0}}; else ext_pad_o <= #1 out_pad; `else assign ext_pad_o = out_pad; `endif `else // // When GPIO is not implemented, drive all outputs as would when RGPIO_CTRL // is cleared and WISHBONE transfers complete with errors // assign wb_inta_o = 1'b0; assign wb_ack_o = 1'b0; assign wb_err_o = wb_cyc_i & wb_stb_i; assign ext_padoen_o = {gw{1'b1}}; assign ext_pad_o = {gw{1'b0}}; // // Read GPIO registers // assign wb_dat_o = {dw{1'b0}}; `endif endmodule
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