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//
// Copyright 2012 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
//CUSTOMIZE ME!
//The following module is used to re-write receive packets to the host.
//This module provides a packet-based ram interface for manipulating packets.
//The user writes a custom engine (state machine) to read the input packet,
//and to produce a new output packet. For users customizing the DSP operation,
//your customizations may be better suited for the custom_dsp_rx module.
//By default, this module uses the built-in 16 to 8 bit converter engine.
module custom_engine_rx
#(
//the dsp unit number: 0, 1, 2...
parameter DSPNO = 0,
//buffer size for ram interface engine
parameter BUF_SIZE = 10,
//base address for built-in settings registers used in this module
parameter MAIN_SETTINGS_BASE = 0
)
(
//control signals
input clock, input reset, input clear,
//main settings bus for built-in modules
input set_stb_main, input [7:0] set_addr_main, input [31:0] set_data_main,
//user settings bus, controlled through user setting regs API
input set_stb_user, input [7:0] set_addr_user, input [31:0] set_data_user,
//ram interface for engine
output access_we,
output access_stb,
input access_ok,
output access_done,
output access_skip_read,
output [BUF_SIZE-1:0] access_adr,
input [BUF_SIZE-1:0] access_len,
output [35:0] access_dat_o,
input [35:0] access_dat_i,
//debug output (optional)
output [31:0] debug
);
generate
if (DSPNO==0) begin
`ifndef RX_ENG0_MODULE
dspengine_16to8 #(.BASE(MAIN_SETTINGS_BASE), .BUF_SIZE(BUF_SIZE)) dspengine_16to8
(.clk(clock),.reset(reset),.clear(clear),
.set_stb(set_stb_main), .set_addr(set_addr_main), .set_data(set_data_main),
.access_we(access_we), .access_stb(access_stb), .access_ok(access_ok), .access_done(access_done),
.access_skip_read(access_skip_read), .access_adr(access_adr), .access_len(access_len),
.access_dat_i(access_dat_i), .access_dat_o(access_dat_o));
`else
RX_ENG0_MODULE #(.BUF_SIZE(BUF_SIZE)) rx_eng0_custom
(.clock(clock),.reset(reset),.clear(clear),
.set_stb(set_stb_user), .set_addr(set_addr_user), .set_data(set_data_user),
.access_we(access_we), .access_stb(access_stb), .access_ok(access_ok), .access_done(access_done),
.access_skip_read(access_skip_read), .access_adr(access_adr), .access_len(access_len),
.access_dat_i(access_dat_i), .access_dat_o(access_dat_o));
`endif
end
else begin
`ifndef RX_ENG1_MODULE
dspengine_16to8 #(.BASE(MAIN_SETTINGS_BASE), .BUF_SIZE(BUF_SIZE)) dspengine_16to8
(.clk(clock),.reset(reset),.clear(clear),
.set_stb(set_stb_main), .set_addr(set_addr_main), .set_data(set_data_main),
.access_we(access_we), .access_stb(access_stb), .access_ok(access_ok), .access_done(access_done),
.access_skip_read(access_skip_read), .access_adr(access_adr), .access_len(access_len),
.access_dat_i(access_dat_i), .access_dat_o(access_dat_o));
`else
RX_ENG1_MODULE #(.BUF_SIZE(BUF_SIZE)) rx_eng1_custom
(.clock(clock),.reset(reset),.clear(clear),
.set_stb(set_stb_user), .set_addr(set_addr_user), .set_data(set_data_user),
.access_we(access_we), .access_stb(access_stb), .access_ok(access_ok), .access_done(access_done),
.access_skip_read(access_skip_read), .access_adr(access_adr), .access_len(access_len),
.access_dat_i(access_dat_i), .access_dat_o(access_dat_o));
`endif
end
endgenerate
endmodule //custom_engine_rx
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