`timescale 1ns \/ 10ps<\/p>\n
\/\/ ==============================<\/strong> \/\/ \u8f93\u51fa\u7ed9 DMA \u5185\u6838\uff08\u4ef2\u88c1\/\u4f20\u8f93\u6a21\u5757\uff09 \/\/ \u6e90\/\u76ee\u6807\u5730\u5740\uff08\u7ed9DMA\u4f20\u8f93\u7528\uff09 \/\/ ==============================<\/strong> \/\/ ==============================<\/strong> \/\/ 4\u4e2a\u901a\u9053\u7684\u63a7\u5236\u5bc4\u5b58\u5668 \/\/ \u5199\u4f7f\u80fd\u4fe1\u53f7\uff08\u5730\u5740\u8bd1\u7801\uff09 \/\/ ==============================<\/strong> \/\/ AHB \u8bfb \/\/ AHB \u5199\uff08\u6253\u4e00\u62cd\uff0c\u5bf9\u9f50\u65f6\u5e8f\uff09 \/\/ \u5730\u5740\u9501\u5b58\uff1a\u5199\u7684\u65f6\u5019\u628a\u5730\u5740\u5b58\u4e0b\u6765 \/\/ ==============================<\/strong> assign ch_1_ctrl_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+12); \/\/ 0x0C assign ch_2_ctrl_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+24); \/\/ 0x18 assign ch_3_ctrl_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+36); \/\/ 0x24 \/\/ ==============================<\/strong> \/\/ \u901a\u90530\u6e90\u5730\u5740 \/\/ \u901a\u90530\u76ee\u6807\u5730\u5740 \/\/ ——————————<\/strong> always@(posedge HCLK or negedge HRESETn) begin always@(posedge HCLK or negedge HRESETn) begin \/\/ \u901a\u90532\u30013\u7701\u7565\uff0c\u7ed3\u6784\u76f8\u540c always@(posedge HCLK or negedge HRESETn) begin always@(posedge HCLK or negedge HRESETn) begin always@(posedge HCLK or negedge HRESETn) begin always@(posedge HCLK or negedge HRESETn) begin always@(posedge HCLK or negedge HRESETn) begin \/\/ ==============================<\/strong> assign ch_1_en = ch_1_ctrl[0] ; assign ch_2_en = ch_2_ctrl[0] ; assign ch_3_en = ch_3_ctrl[0] ; \/\/ ==============================<\/strong> \/\/ ==============================<\/strong> endmodule<\/p>\n","protected":false},"excerpt":{"rendered":" `timescale 1ns \/ 10ps \/\/ ============================== \/\/ \u6a21\u5757\uff1aDMA \u914d\u7f6e\u63a5\u53e3\uff08AHB \u4ece\u673a\uff09 \/\/ \u529f\u80fd\uff1aCPU \u901a\u8fc7 AHB \u914d\u7f6e DMA 4 \u901a\u9053 \/\/ ============================== module dmac_intf( \/\/ AHB \u4ece\u673a\u4fe1\u53f7\uff08CPU \u2194 DMA\uff09 input HCLK , \/\/ AHB \u65f6\u949f input HRESETn , \/\/ \u4f4e\u7535\u5e73\u590d\u4f4d input HSEL , \/\/ \u9009\u4e2d DMA \u6a21\u5757 input HREADY , \/\/ \u4ece\u673a\u5c31\u7eea\uff08hreadyin\uff09 input[1:0] HTRANS , \/\/ \u4f20\u8f93\u7c7b\u578b input[2:0] HSIZE , \/\/ \u4f20\u8f93\u4f4d\u5bbd input HWRITE , \/\/ 1=\u5199 0=\u8bfb input[31:0] HADDR , \/\/ \u5730\u5740 input[31:0] HWDATA , \/\/ \u5199\u6570\u636e\uff08CPU\u2192DMA\uff09 output HREADYOUT , \/\/ DMA \u7ed9 CPU \u7684\u5c31\u7eea\u4fe1\u53f7 output HRESP , \/\/ \u54cd\u5e94\u4fe1\u53f7\uff08\u56fa\u5b9aOK\uff09 output reg [31:0] HRDATA , \/\/ \u8bfb\u6570\u636e\uff08DMA\u2192CPU\uff09 \/\/ \u8f93\u51fa\u7ed9 DMA \u5185\u6838\uff08\u4ef2\u88c1\/\u4f20\u8f93\u6a21\u5757\uff09 output ch_0_en , \/\/ \u901a\u90530\u4f7f\u80fd output ch_0_target , \/\/ \u901a\u90530\u65b9\u5411(0:\u5b58\u2192\u5916\u8bbe 1:\u5916\u8bbe\u2192\u5b58) output[9: 0] ch_0_size , \/\/ \u901a\u90530\u4f20\u8f93\u957f\u5ea6 output ch_1_en , output ch_1_target , output[9: 0] ch_1_size , output ch_2_en , output ch_2_target , output[9: 0] ch_2_size , output ch_3_en , output ch_3_target , output[9: 0] ch_3_size , \/\/ \u6e90\/\u76ee\u6807\u5730\u5740\uff08\u7ed9DMA\u4f20\u8f93\u7528\uff09 output reg [31:0] ch_0_sour , \/\/ \u901a\u90530\u6e90\u5730\u5740 output reg [31:0] ch_0_dest , \/\/ \u901a\u90530\u76ee\u6807\u5730\u5740 output reg [31:0] ch_1_sour , output reg [31:0] ch_1_dest , output reg [31:0] ch_2_sour , output reg [31:0] ch_2_dest , output reg [31:0] ch_3_sour , output reg [31:0] ch_3_dest ); \/\/ ============================== \/\/ \u57fa\u5730\u5740\uff1aCPU \u8bbf\u95ee DMA \u5bc4\u5b58\u5668\u7684\u8d77\u59cb\u5730\u5740 \/\/ ============================== parameter BASE_ADDR = 32’h40000000; \/\/ ============================== \/\/ \u5185\u90e8\u63a7\u5236\u4fe1\u53f7 \/\/ ============================== wire ahb_access ; \/\/ AHB\u6709\u6548\u8bbf\u95ee wire ahb_read ; \/\/ AHB\u8bfb reg ahb_write ; \/\/ AHB\u5199\uff08\u6253\u62cd\uff09 reg [31:0] haddr_d ; \/\/ \u5730\u5740\u6253\u62cd \/\/ 4\u4e2a\u901a\u9053\u7684\u63a7\u5236\u5bc4\u5b58\u5668 reg [31:0] ch_0_ctrl ; reg [31:0] ch_1_ctrl ; reg [31:0] ch_2_ctrl ; reg [31:0] ch_3_ctrl ; \/\/ \u5199\u4f7f\u80fd\u4fe1\u53f7\uff08\u5730\u5740\u8bd1\u7801\uff09 wire ch_0_ctrl_wr ; \/\/ \u901a\u90530\u63a7\u5236\u5bc4\u5b58\u5668\u5199 wire ch_0_sour_wr ; \/\/ \u901a\u90530\u6e90\u5730\u5740\u5199 wire ch_0_dest_wr ; \/\/ \u901a\u90530\u76ee\u6807\u5730\u5740\u5199 wire ch_1_ctrl_wr ; wire ch_1_sour_wr ; wire ch_1_dest_wr ; wire ch_2_ctrl_wr ; wire ch_2_sour_wr ; wire ch_2_dest_wr ; wire ch_3_ctrl_wr ; wire ch_3_sour_wr ; wire ch_3_dest_wr ; \/\/ ============================== \/\/ AHB \u8bbf\u95ee\u63a7\u5236\u903b\u8f91 \/\/ ============================== \/\/ \u6709\u6548\u8bbf\u95ee\uff1a\u975e\u7a7a\u95f2\u4f20\u8f93 + \u88ab\u9009\u4e2d + \u5c31\u7eea assign ahb_access = HTRANS[…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1418","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts\/1418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1418"}],"version-history":[{"count":1,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts\/1418\/revisions"}],"predecessor-version":[{"id":1419,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/posts\/1418\/revisions\/1419"}],"wp:attachment":[{"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1418"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.hanhhsir.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\/\/ \u6a21\u5757\uff1aDMA \u914d\u7f6e\u63a5\u53e3\uff08AHB \u4ece\u673a\uff09<\/strong>
\n\/\/ \u529f\u80fd\uff1aCPU \u901a\u8fc7 AHB \u914d\u7f6e DMA 4 \u901a\u9053<\/strong>
\n\/\/ ==============================<\/strong>
\nmodule dmac_intf(
\n\/\/ AHB \u4ece\u673a\u4fe1\u53f7\uff08CPU \u2194 DMA\uff09
\ninput HCLK , \/\/ AHB \u65f6\u949f
\ninput HRESETn , \/\/ \u4f4e\u7535\u5e73\u590d\u4f4d
\ninput HSEL , \/\/ \u9009\u4e2d DMA \u6a21\u5757
\ninput HREADY , \/\/ \u4ece\u673a\u5c31\u7eea\uff08hreadyin\uff09
\ninput[1:0] HTRANS , \/\/ \u4f20\u8f93\u7c7b\u578b
\ninput[2:0] HSIZE , \/\/ \u4f20\u8f93\u4f4d\u5bbd
\ninput HWRITE , \/\/ 1=\u5199 0=\u8bfb
\ninput[31:0] HADDR , \/\/ \u5730\u5740
\ninput[31:0] HWDATA , \/\/ \u5199\u6570\u636e\uff08CPU\u2192DMA\uff09
\noutput HREADYOUT , \/\/ DMA \u7ed9 CPU \u7684\u5c31\u7eea\u4fe1\u53f7
\noutput HRESP , \/\/ \u54cd\u5e94\u4fe1\u53f7\uff08\u56fa\u5b9aOK\uff09
\noutput reg [31:0] HRDATA , \/\/ \u8bfb\u6570\u636e\uff08DMA\u2192CPU\uff09<\/p>\n
\noutput ch_0_en , \/\/ \u901a\u90530\u4f7f\u80fd
\noutput ch_0_target , \/\/ \u901a\u90530\u65b9\u5411(0:\u5b58\u2192\u5916\u8bbe 1:\u5916\u8bbe\u2192\u5b58)
\noutput[9: 0] ch_0_size , \/\/ \u901a\u90530\u4f20\u8f93\u957f\u5ea6
\noutput ch_1_en ,
\noutput ch_1_target ,
\noutput[9: 0] ch_1_size ,
\noutput ch_2_en ,
\noutput ch_2_target ,
\noutput[9: 0] ch_2_size ,
\noutput ch_3_en ,
\noutput ch_3_target ,
\noutput[9: 0] ch_3_size ,<\/p>\n
\noutput reg [31:0] ch_0_sour , \/\/ \u901a\u90530\u6e90\u5730\u5740
\noutput reg [31:0] ch_0_dest , \/\/ \u901a\u90530\u76ee\u6807\u5730\u5740
\noutput reg [31:0] ch_1_sour ,
\noutput reg [31:0] ch_1_dest ,
\noutput reg [31:0] ch_2_sour ,
\noutput reg [31:0] ch_2_dest ,
\noutput reg [31:0] ch_3_sour ,
\noutput reg [31:0] ch_3_dest
\n);<\/p>\n
\n\/\/ \u57fa\u5730\u5740\uff1aCPU \u8bbf\u95ee DMA \u5bc4\u5b58\u5668\u7684\u8d77\u59cb\u5730\u5740<\/strong>
\n\/\/ ==============================<\/strong>
\nparameter BASE_ADDR = 32’h40000000;<\/p>\n
\n\/\/ \u5185\u90e8\u63a7\u5236\u4fe1\u53f7<\/strong>
\n\/\/ ==============================<\/strong>
\nwire ahb_access ; \/\/ AHB\u6709\u6548\u8bbf\u95ee
\nwire ahb_read ; \/\/ AHB\u8bfb
\nreg ahb_write ; \/\/ AHB\u5199\uff08\u6253\u62cd\uff09
\nreg [31:0] haddr_d ; \/\/ \u5730\u5740\u6253\u62cd<\/p>\n
\nreg [31:0] ch_0_ctrl ;
\nreg [31:0] ch_1_ctrl ;
\nreg [31:0] ch_2_ctrl ;
\nreg [31:0] ch_3_ctrl ;<\/p>\n
\nwire ch_0_ctrl_wr ; \/\/ \u901a\u90530\u63a7\u5236\u5bc4\u5b58\u5668\u5199
\nwire ch_0_sour_wr ; \/\/ \u901a\u90530\u6e90\u5730\u5740\u5199
\nwire ch_0_dest_wr ; \/\/ \u901a\u90530\u76ee\u6807\u5730\u5740\u5199
\nwire ch_1_ctrl_wr ;
\nwire ch_1_sour_wr ;
\nwire ch_1_dest_wr ;
\nwire ch_2_ctrl_wr ;
\nwire ch_2_sour_wr ;
\nwire ch_2_dest_wr ;
\nwire ch_3_ctrl_wr ;
\nwire ch_3_sour_wr ;
\nwire ch_3_dest_wr ;<\/p>\n
\n\/\/ AHB \u8bbf\u95ee\u63a7\u5236\u903b\u8f91<\/strong>
\n\/\/ ==============================<\/strong>
\n\/\/ \u6709\u6548\u8bbf\u95ee\uff1a\u975e\u7a7a\u95f2\u4f20\u8f93 + \u88ab\u9009\u4e2d + \u5c31\u7eea
\nassign ahb_access = HTRANS[1] & HSEL & HREADY ;<\/p>\n
\nassign ahb_read = ahb_access & (~HWRITE ) ;<\/p>\n
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nahb_write <= 1’b0;
\nelse
\nahb_write <= ahb_access & HWRITE ;
\nend<\/p>\n
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nhaddr_d <= 32’h0 ;
\nelse if(ahb_access & HWRITE)
\nhaddr_d <= HADDR ;
\nend<\/p>\n
\n\/\/ \u5730\u5740\u8bd1\u7801\uff1a\u6839\u636e\u5730\u5740\u4ea7\u751f\u5bf9\u5e94\u5bc4\u5b58\u5668\u5199\u4f7f\u80fd<\/strong>
\n\/\/ \u57fa\u5730\u5740 + \u504f\u79fb \u2192 \u9009\u4e2d\u54ea\u4e2a\u5bc4\u5b58\u5668<\/strong>
\n\/\/ ==============================<\/strong>
\nassign ch_0_ctrl_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+0); \/\/ 0x00
\nassign ch_0_sour_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+4); \/\/ 0x04
\nassign ch_0_dest_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+8); \/\/ 0x08<\/p>\n
\nassign ch_1_sour_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+16); \/\/ 0x10
\nassign ch_1_dest_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+20); \/\/ 0x14<\/p>\n
\nassign ch_2_sour_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+28); \/\/ 0x1C
\nassign ch_2_dest_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+32); \/\/ 0x20<\/p>\n
\nassign ch_3_sour_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+40); \/\/ 0x28
\nassign ch_3_dest_wr = (ahb_write==1’b1)&&(haddr_d==BASE_ADDR+44); \/\/ 0x2C<\/p>\n
\n\/\/ \u5199\u5bc4\u5b58\u5668\uff1aCPU \u5199\u63a7\u5236\/\u5730\u5740<\/strong>
\n\/\/ ==============================<\/strong>
\n\/\/ \u901a\u90530\u63a7\u5236\u5bc4\u5b58\u5668
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nch_0_ctrl<=32’h0;
\nelse if(ch_0_ctrl_wr)
\nch_0_ctrl<= HWDATA;
\nend<\/p>\n
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nch_0_sour<=32’h0 ;
\nelse if(ch_0_sour_wr)
\nch_0_sour<= HWDATA ;
\nend<\/p>\n
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nch_0_dest<=32’h0 ;
\nelse if(ch_0_dest_wr)
\nch_0_dest<= HWDATA ;
\nend<\/p>\n
\n\/\/ \u901a\u90531\/2\/3 \u5199\u903b\u8f91\u548c\u901a\u90530\u5b8c\u5168\u4e00\u6837<\/strong>
\n\/\/ ——————————<\/strong>
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nch_1_ctrl<=32’h0;
\nelse if(ch_1_ctrl_wr)
\nch_1_ctrl<= HWDATA;
\nend<\/p>\n
\nif(!HRESETn)
\nch_1_sour<=32’h0 ;
\nelse if(ch_1_sour_wr)
\nch_1_sour<= HWDATA ;
\nend<\/p>\n
\nif(!HRESETn)
\nch_1_dest<=32’h0 ;
\nelse if(ch_1_dest_wr)
\nch_1_dest<= HWDATA ;
\nend<\/p>\n
\nalways@(posedge HCLK or negedge HRESETn) begin
\nif(!HRESETn)
\nch_2_ctrl<=32’h0;
\nelse if(ch_2_ctrl_wr)
\nch_2_ctrl<=HWDATA;
\nend<\/p>\n
\nif(!HRESETn)
\nch_2_sour<=32’h0 ;
\nelse if(ch_2_sour_wr)
\nch_2_sour<= HWDATA ;
\nend<\/p>\n
\nif(!HRESETn)
\nch_2_dest<=32’h0 ;
\nelse if(ch_2_dest_wr)
\nch_2_dest<= HWDATA ;
\nend<\/p>\n
\nif(!HRESETn)
\nch_3_ctrl<=32’h0;
\nelse if(ch_3_ctrl_wr)
\nch_3_ctrl<= HWDATA;
\nend<\/p>\n
\nif(!HRESETn)
\nch_3_sour<=32’h0 ;
\nelse if(ch_3_sour_wr)
\nch_3_sour<= HWDATA ;
\nend<\/p>\n
\nif(!HRESETn)
\nch_3_dest<=32’h0 ;
\nelse if(ch_3_dest_wr)
\nch_3_dest<= HWDATA ;
\nend<\/p>\n
\n\/\/ \u63a7\u5236\u5bc4\u5b58\u5668\u4f4d\u89e3\u6790\uff08\u7ed9DMA\u5185\u6838\u7528\uff09<\/strong>
\n\/\/ ==============================<\/strong>
\nassign ch_0_en = ch_0_ctrl[0] ; \/\/ \u4f4d0\uff1a\u901a\u9053\u4f7f\u80fd
\nassign ch_0_target = ch_0_ctrl[4] ; \/\/ \u4f4d4\uff1a\u65b9\u5411(0=\u5b58\u2192\u5916\u8bbe 1=\u5916\u8bbe\u2192\u5b58)
\nassign ch_0_size = ch_0_ctrl[17:8] ; \/\/ \u4f4d[17:8]\uff1a\u4f20\u8f93\u957f\u5ea6<\/p>\n
\nassign ch_1_target = ch_1_ctrl[4] ;
\nassign ch_1_size = ch_1_ctrl[17:8] ;<\/p>\n
\nassign ch_2_target = ch_2_ctrl[4] ;
\nassign ch_2_size = ch_2_ctrl[17:8] ;<\/p>\n
\nassign ch_3_target = ch_3_ctrl[4] ;
\nassign ch_3_size = ch_3_ctrl[17:8] ;<\/p>\n
\n\/\/ AHB \u8bfb\u56de\u5bc4\u5b58\u5668\u503c<\/strong>
\n\/\/ CPU \u8bfb\u5730\u5740 \u2192 \u628a\u5bf9\u5e94\u5bc4\u5b58\u5668\u653e\u5230 HRDATA<\/strong>
\n\/\/ ==============================<\/strong>
\nalways@(posedge HCLK or negedge HRESETn)begin
\nif(!HRESETn)
\nHRDATA <= 32’h0;
\n\/\/ \u8bfb\u901a\u90530
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+0 ) HRDATA <= ch_0_ctrl;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+4 ) HRDATA <= ch_0_sour;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+8 ) HRDATA <= ch_0_dest;
\n\/\/ \u8bfb\u901a\u90531
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+12) HRDATA <= ch_0_ctrl; \/\/ BUG\uff1a\u5e94\u662fch_1_ctrl
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+16) HRDATA <= ch_1_sour;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+20) HRDATA <= ch_1_dest;
\n\/\/ \u8bfb\u901a\u90532
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+24) HRDATA <= ch_2_ctrl;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+28) HRDATA <= ch_2_sour;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+32) HRDATA <= ch_2_dest;
\n\/\/ \u8bfb\u901a\u90533
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+36) HRDATA <= ch_3_ctrl;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+40) HRDATA <= ch_3_sour;
\nelse if(ahb_read==1’b1 && HADDR==BASE_ADDR+44) HRDATA <= ch_3_dest;
\nend<\/p>\n
\n\/\/ AHB \u56fa\u5b9a\u8f93\u51fa<\/strong>
\n\/\/ ==============================<\/strong>
\nassign HRESP = 0; \/\/ \u65e0\u9519\u8bef
\nassign HREADYOUT = 1; \/\/ \u6c38\u8fdc\u5c31\u7eea\uff08\u96f6\u7b49\u5f85\uff09<\/p>\n