opb_hc164.v

Xilinx ISE9.x FPGACPLD设计指南 原书光盘上的源码 包含大量vhdl源码

module opb_hc164(
  iCLK,
  iRST,
  iOPB_ABUS,
  iOPB_DBUS,
  iOPB_BE,
  iOPB_RNW,
  iOPB_SELECT,
  iOPB_SEQADDR,
    
  oHC_DBUS,
  oHC_XFERACK,
  oHC_errAck, 
  oHC_toutSup,
  oHC_retry,    
  
  oHCCP,
  oHCSI

);

parameter C_BASEADDR = 32'h8000_0000;
parameter C_HIGHADDR = 32'h8000_00ff;

// parameter C_EXT_RESET_HIGH = 1'b1;

input         iCLK     ;  // OPB Bus clock
input         iRST     ;  // OPB RST High Active
input [31: 0] iOPB_ABUS;  // Address Bus 32 bits
input [31: 0] iOPB_DBUS;  // Data Bus input 32 bits
input [ 3: 0] iOPB_BE  ;  // Byte Enable Singal => Ingore
input         iOPB_RNW ;  // Read and Write Signal
input         iOPB_SELECT;// Module Select Signal 
input         iOPB_SEQADDR;// Don't use  
output[31: 0] oHC_DBUS   ;// Data Bus output 32bits
output        oHC_XFERACK;// Bus Acknowledge Signal
output        oHC_errAck ;// Don't Use. Connectted to GND  
output        oHC_toutSup;// Don't Use. Connectted to GND 
output        oHC_retry  ;// Don't Use. Connectted to GND     
output        oHCCP      ;// Enable Clock Signal to HC164 chip
output        oHCSI      ;// Serial Data transfer to HC164 chip

wire s_rst_n;

wire [ 3: 0] s_LED_VAL;
wire [15: 0] s_SEG_VAL;
wire [ 3: 0] s_SEG_DOT;

assign s_rst_n = ~ iRST;


hc164_driver hc164_driver_inst(
    .clk(           iCLK),
    .rst_n(      s_rst_n),
    .led(      s_LED_VAL),
    .seg_value(s_SEG_VAL),
    .dot(      s_SEG_DOT),
    .hc_si(        oHCSI),
    .hc_cp(        oHCCP)
);

opb_hc164_busif #(.C_BASEADDR( C_BASEADDR ) )busif(
  .iCLK(                iCLK),
  .iRST_N(           s_rst_n),
  .iOPB_ABUS(      iOPB_ABUS),
  .iOPB_DBUS(      iOPB_DBUS),
  .iOPB_BE(          iOPB_BE),
  .iOPB_RNW(        iOPB_RNW),
  .iOPB_SELECT(  iOPB_SELECT),
  .iOPB_SEQADDR(iOPB_SEQADDR),            
  
  .oHC_errAck(    oHC_errAck), 
  .oHC_toutSup(  oHC_toutSup),
  .oHC_retry(      oHC_retry),  
  
  .oHC_DBUS(        oHC_DBUS),
  .oHC_XFERACK(  oHC_XFERACK),

  .oLED_VAL(       s_LED_VAL),
  .oSEG_VAL(       s_SEG_VAL),
  .oSEG_DOT(       s_SEG_DOT)


);


endmodule