AHB总线下的slaveram的verilog代码

1、moduleram_top(hclkhresetnhsel_shaddr_shburst_shtrans_shrdata_shwdata_shwrite_shready_shresp_s);inputhclkinputhresetninputhsel_sinput19:0haddr_sinput2:0hburst_sinput1:0htrans_sinput31:0hwdata_sinputhwrite_soutput1:0hresp_soutput31:0hrdata_soutputhready_swire31:0ram_rdatawire17:0ram_addrwire31:0ram_wd

2、atawireram_writeram_ahbifU_ram_ahbif(.hclk(hclk),.hresetn(hresetn),.hsel_s(hsel_s),.haddr_s(haddr_s),.hburst_s(hburst_s),.htrans_s(htrans_s),.hrdata_s(hrdata_s),.hwdata_s(hwdata_s),.hwrite_s(hwrite_s),.hready_s(hready_s),.hresp_s(hresp_s),.ram_rdata(ram_rdata),.ram_addr(ram_addr),.ram_wdata(ram_wdat

3、a).ram_write);(ram_write)ram_inferU_ram_infer(.q(ram_rdata),.a(ram_addr),.d(ram_wdata).we(ram_write),.clk);(hclk)endmodulemoduleram_infer(q,a,d,we,clk);output31:0);q;input31:0d;input17:0a;inputwe;inputclk;reg31:0mem262143:0always(posedgeclk)beginif(we)beginmema=d;endendassignq=mema;endmodulemodulera

4、m_ahbif(hclkhresetn/ahbslavehsel_shaddr_shburst_shtrans_shrdata_shwdata_shwrite_shready_shresp_s/raminterfaceram_rdataram_addrram_wdataram_write);/declarationofinput&output/inputhclkinputhresetn/ahbslaveinterfaceinputhsel_sinput19:0haddr_sinput2:0hburst_sinput1:0htrans_sinput31:0hwdata_sinputhwrite_

5、soutput1:0hresp_soutput31:0hrdata_soutputhready_s/raminterfaceinput31:0ram_rdataoutput17:0ram_addroutput31:0ram_wdataoutputram_write/declarationofregisters&wires/wire1:0hresp_swire31:0hrdata_sreghready_swire31:0ram_wdatareg17:0ram_addrregram_writewirewr_enwirerd_enwireready_en/program&function/assig

6、nhresp_s=2b00;always(posedgehclkornegedgehresetn)begin/hsize=3b010-32bitsif(!hresetn)beginram_addr=18b000000000000000000;endelseif(hsel_s=1b1)beginram_addr=haddr_s19:2;endendassignwr_en=hsel_s&htrans_s1&hwrite_s;/assignrd_en=hsel_s&htrans_s1&!hwrite_s;always(posedgehclkornegedgehresetn)beginif(!hresetn)beginram_write=1b0;endelseif(wr_en)beginram_write=1b1;endelsebeginram_write=1b0;endendassignram_wdata=hwdata_s;assignhrdata_s=ram_rdata;assignready_en=hsel_s&htrans_s1;always(posedgehclkornegedgehresetn)beginif