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[/] [usbhostslave/] [trunk/] [RTL/] [hostController/] [sendpacketarbiter.v] - Rev 2
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//-------------------------------------------------------------------------------------------------- // // Title : No Title // Design : usbhostslave // Author : // Company : // //------------------------------------------------------------------------------------------------- // // File : c:\projects\USBHostSlave\Aldec\usbhostslave\usbhostslave\compile\sendpacketarbiter.v // Generated : 09/10/04 20:20:24 // From : c:\projects\USBHostSlave\RTL\hostController\sendpacketarbiter.asf // By : FSM2VHDL ver. 4.0.3.8 // //------------------------------------------------------------------------------------------------- // // Description : // //------------------------------------------------------------------------------------------------- `timescale 1ns / 1ps `include "usbConstants_h.v" module sendPacketArbiter (HCTxGnt, HCTxReq, HC_PID, HC_SP_WEn, SOFTxGnt, SOFTxReq, SOF_SP_WEn, clk, rst, sendPacketPID, sendPacketWEnable); input HCTxReq; input [3:0] HC_PID; input HC_SP_WEn; input SOFTxReq; input SOF_SP_WEn; input clk; input rst; output HCTxGnt; output SOFTxGnt; output [3:0] sendPacketPID; output sendPacketWEnable; reg HCTxGnt, next_HCTxGnt; wire HCTxReq; wire [3:0] HC_PID; wire HC_SP_WEn; reg SOFTxGnt, next_SOFTxGnt; wire SOFTxReq; wire SOF_SP_WEn; wire clk; wire rst; reg [3:0] sendPacketPID, next_sendPacketPID; reg sendPacketWEnable, next_sendPacketWEnable; // diagram signals declarations reg muxSOFNotHC, next_muxSOFNotHC; // BINARY ENCODED state machine: sendPktArb // State codes definitions: `define HC_ACT 2'b00 `define SOF_ACT 2'b01 `define SARB_WAIT_REQ 2'b10 `define START_SARB 2'b11 reg [1:0] CurrState_sendPktArb; reg [1:0] NextState_sendPktArb; // Diagram actions (continuous assignments allowed only: assign ...) // hostController/SOFTransmit mux always @(muxSOFNotHC or SOF_SP_WEn or HC_SP_WEn or HC_PID) begin if (muxSOFNotHC == 1'b1) begin sendPacketWEnable <= SOF_SP_WEn; sendPacketPID <= `SOF; end else begin sendPacketWEnable <= HC_SP_WEn; sendPacketPID <= HC_PID; end end //-------------------------------------------------------------------- // Machine: sendPktArb //-------------------------------------------------------------------- //---------------------------------- // NextState logic (combinatorial) //---------------------------------- always @ (HCTxReq or SOFTxReq or HCTxGnt or SOFTxGnt or muxSOFNotHC or CurrState_sendPktArb) begin : sendPktArb_NextState NextState_sendPktArb <= CurrState_sendPktArb; // Set default values for outputs and signals next_HCTxGnt <= HCTxGnt; next_SOFTxGnt <= SOFTxGnt; next_muxSOFNotHC <= muxSOFNotHC; case (CurrState_sendPktArb) // synopsys parallel_case full_case `HC_ACT: if (HCTxReq == 1'b0) begin NextState_sendPktArb <= `SARB_WAIT_REQ; next_HCTxGnt <= 1'b0; end `SOF_ACT: if (SOFTxReq == 1'b0) begin NextState_sendPktArb <= `SARB_WAIT_REQ; next_SOFTxGnt <= 1'b0; end `SARB_WAIT_REQ: if (SOFTxReq == 1'b1) begin NextState_sendPktArb <= `SOF_ACT; next_SOFTxGnt <= 1'b1; next_muxSOFNotHC <= 1'b1; end else if (HCTxReq == 1'b1) begin NextState_sendPktArb <= `HC_ACT; next_HCTxGnt <= 1'b1; next_muxSOFNotHC <= 1'b0; end `START_SARB: NextState_sendPktArb <= `SARB_WAIT_REQ; endcase end //---------------------------------- // Current State Logic (sequential) //---------------------------------- always @ (posedge clk) begin : sendPktArb_CurrentState if (rst) CurrState_sendPktArb <= `START_SARB; else CurrState_sendPktArb <= NextState_sendPktArb; end //---------------------------------- // Registered outputs logic //---------------------------------- always @ (posedge clk) begin : sendPktArb_RegOutput if (rst) begin muxSOFNotHC <= 1'b0; SOFTxGnt <= 1'b0; HCTxGnt <= 1'b0; end else begin muxSOFNotHC <= next_muxSOFNotHC; SOFTxGnt <= next_SOFTxGnt; HCTxGnt <= next_HCTxGnt; end end endmodule
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