\n\t\u8bbe\u8ba1\u539f\u7406: <\/h2>\n
\n\t\u672c\u8bbe\u8ba1\u91c7\u7528\u4e32\u884c\u6570\/\u6a21\u8f6c\u6362\u82af\u7247TLC5620\uff0cTLC5620\u662f\u4e00\u4e2a\u62e5\u6709\u56db\u8def\u8f93\u51fa\u7684\u6570\/\u6a21\u8f6c\u6362\u5668\uff0c\u65f6\u949f<\/u>\u9891\u7387\u6700\u5927\u53ef\u8fbe\u52301MHz\u3002TLC5620\u82af\u7247\u63a5\u53e3\u5982\u4e0b\uff1a<\/p>\n
\n\t![\"\u57fa\u4e8eTLC5620\u7684\u6570\u6a21\u8f6c\u6362\u5668\u8bbe\u8ba1\"](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250443W0-0.png\")
<\/p>\n
\n\t\u8be5\u82af\u7247\u4e3b\u8981\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a\u56db\u901a\u90538\u4f4d\u7535\u538b\u8f93\u51faDA\u8f6c\u6362\u5668\u30015V\u5355\u7535\u6e90\u4f9b\u7535\u3001\u4e32\u884c\u63a5\u53e3\u3001\u9ad8\u963b\u6297\u57fa\u51c6\u8f93\u5165\u3001\u53ef\u7f16\u7a0b1\u62162\u8f93\u51fa\u8303\u56f4\u3001\u540c\u65f6\u66f4\u65b0\u8bbe\u5907\u3001\u5185\u90e8\u4e0a\u7535\u590d\u4f4d\u3001\u4f4e\u529f\u8017\u3001\u534a\u7f13\u51b2\u8f93\u51fa\u3002\u8be5\u82af\u7247\u4e3b\u8981\u5e94\u7528\u4e8e\uff1a\u53ef\u7f16\u7a0b\u7535\u6e90\u3001\u6570\u5b57\u63a7\u5236\u653e\u5927\u5668<\/u>\/\u8bef\u5dee\u5668\u3001\u79fb\u52a8\u901a\u4fe1\u3001\u81ea\u52a8\u6d4b\u8bd5\u8bbe\u5907\u3001\u7814\u53d1\u8fc7\u7a0b\u68c0\u6d4b\u548c\u63a7\u5236\u548c\u4fe1\u53f7\u5408\u6210\u7b49\u3002<\/p>\n
\n\t\u8f6c\u6362\u516c\u5f0f\uff1aV = REF*\uff08CODE\/256\uff09* (1+RNG)<\/p>\n
\n\tV\uff1a\u5b9e\u9645\u7535\u538b\uff1bREF\uff1a\u57fa\u51c6\u7535\u538b\uff1bCODE\uff1a\u8f93\u51658\u4f4d\u6570\u636e\uff1bRNG\uff1a\u8303\u56f4\u3002<\/p>\n
\n\tTLC5620\u7684\u63a5\u53e3\u65f6\u5e8f\u5982\u4e0b\u5217\u56fe\u6240\u793a\uff1a<\/p>\n
\n\t![\"\u57fa\u4e8eTLC5620\u7684\u6570\u6a21\u8f6c\u6362\u5668\u8bbe\u8ba1\"](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250442122-1.png\")
<\/p>\n
\n\t\u56fe1 LOAD\u63a7\u5236\u66f4\u65b0\uff08LDAC\u4e3a\u4f4e\u7535\u5e73\uff09<\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250444D0-2.png\")
<\/p>\n
\n\t\u56fe2 LDAC\u63a7\u5236\u66f4\u65b0\uff08LDAC\u4e3a\u4f4e\u7535\u5e73\uff09<\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250445021-3.png\")
<\/p>\n
\n\t\u56fe3 LOAD\u63a7\u5236\u66f4\u65b0\uff08\u4f7f\u75288\u4f4d\u4e32\u884c\u6570\u636e\uff0cLOAD\u4e3a\u4f4e\u7535\u5e73\uff09<\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250441149-4.png\")
<\/p>\n
\n\t\u56fe4 LDAC\u63a7\u5236\u66f4\u65b0\uff08\u4f7f\u75288\u4f4d\u4e32\u884c\u6570\u636e\uff09<\/p>\n
\n\t\u5982\u56fe1\u6240\u793a\uff1a\u5f53LOAD\u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c\u6570\u636e\u5728CLK\u7684\u4e0b\u964d\u6cbf\u88ab\u9501\u5b58\u81f3DATA\uff0c\u53ea\u8981\u6240\u6709\u6570\u636e\u88ab\u9501\u5b58\uff0c\u5219\u5c06LOAD\u62c9\u4f4e\uff0c\u5c06\u6570\u636e\u4ece\u4e32\u884c\u8f93\u5165\u5bc4\u5b58\u5668<\/u>\u4f20\u9001\u5230\u6240\u9009\u62e9\u7684DAC\u3002<\/p>\n
\n\t\u5982\u56fe2\u6240\u793a\uff1a\u4e32\u884c\u7f16\u7a0b\u671f\u95f4LDAC\u4e3a\u9ad8\u7535\u5e73\uff0c\u6570\u636e\u5728LOAD\u4e3a\u4f4e\u7535\u5e73\u65f6\u8fdb\u884c\u9501\u5b58\uff0c\u5f53LDAC\u53d8\u4e3a\u4f4e\u7535\u5e73\u65f6\u4f20\u9001\u81f3DAC\u8f93\u51fa\u3002\u5982\u56fe3\u30014\u6240\u793a\uff1a\u8f93\u5165\u6570\u636e\u6700\u9ad8\u4f4d\uff08MSB\uff09\u5728\u524d\uff0c\u6570\u636e\u4f20\u8f93\u4f7f\u7528\u4e24\u4e2a8\u4e2a\u65f6\u949f\u5468\u671f\u3002<\/p>\n
\n\t\u5728\u672c\u8bbe\u8ba1\u4e2d\u8fd0\u7528\u7684\u662f\u56fe1\u7684\u5de5\u4f5c\u65f6\u5e8f\uff1a<\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/12504421T-5.png\")
<\/p>\n
\n\t\u6570\u636e\u901a\u9053\u9009\u62e9\uff1a<\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250441W0-6.png\")
<\/p>\n
\n\tRNG\uff1a\u63a7\u5236DAC\u8f93\u51fa\u8303\u56f4\u3002\u5f53RNG\u4e3a\u4f4e\u65f6\uff0c\u8f93\u51fa\u8303\u56f4\u5728\u57fa\u51c6\u7535\u538b\u548cGND\u4e4b\u95f4\uff1b\u5f53RNG\u4e3a\u9ad8\u65f6\uff0c\u8f93\u51fa\u8303\u56f4\u4e3a\u4e24\u500d\u7684\u57fa\u51c6\u7535\u538b\u548cGND\u3002<\/p>\n
\n\t\u8bbe\u8ba1\u67b6\u6784\u56fe: <\/h2>\n
\n\t\u672c\u8bbe\u8ba1\u9a71\u52a8TLC5620\u5c06\u8f93\u5165\u7684\u6570\u5b57\u91cf\u8f6c\u6362\u4e3a\u5b9e\u9645\u7684\u6a21\u62df\u91cf\uff08\u7535\u538b\uff09\uff0c\u901a\u8fc7\u56db\u4e2a\u6309\u952e\u63a7\u5236\u56db\u8def\u8f93\u51fa\u7684\u7535\u538b\u53d8\u5316\uff0c\u6bcf\u6309\u4e00\u6b21\uff0c\u7535\u538b\u503c\u4e5f\u968f\u4e4b\u4e0a\u5347\uff0c\u540c\u65f6\u5728\u6570\u7801\u7ba1\u4e0a\u4e5f\u4f9d\u6b21\u663e\u793a\u76f8\u5e94\u7684\u503c\uff08\u4f9d\u6b21\u4e3aA1,A0,RNG,\u8f93\u5165DATA\uff09\u3002\u672c\u8bbe\u8ba1\u91c7\u7528\u7684\u5f00\u53d1\u677f\u7684\u57fa\u51c6\u7535\u538b\u4e3a2.5V\u3002\u8bbe\u8ba1\u67b6\u6784\u56fe\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250443C8-7.png\")
<\/p>\n
\n\tkey_test\u6a21\u5757\u901a\u8fc7\u56db\u4e2a\u6309\u952e\u8f93\u5165\u7684\u503c\uff0c\u7ec4\u5408\u8f93\u51fa\u4e24\u4e2a\u6570\u636e\uff0c11\u4f4d\u7684wr_data\u662fTLC_DA\u6a21\u5757\u89e3\u7801\u6240\u9700\u7684\u6570\u636e\u300220\u4f4d\u7684out_data\u662fseg_num\u6a21\u5757\u6570\u7801\u7ba1\u663e\u793a\u6240\u9700\u7684\u6570\u636e\u3002<\/p>\n
\n\t\u8bbe\u8ba1\u4ee3\u7801: <\/p>\n
\n\tkey_test\u6a21\u5757\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
\n\t0 module key_test( \/\/\u6309\u952e\u63a7\u5236\u6a21\u5757<\/p>\n
\n\t1 \/\/\u7aef\u53e3\u4fe1\u53f7\uff1a\u6a21\u5757\u7684\u8f93\u5165\u8f93\u51fa\u63a5\u53e3<\/p>\n
\n\t2 input clk, \/\/50MHZ<\/p>\n
\n\t3 input rs<\/u>t_n, \/\/\u4f4e\u7535\u5e73\u590d\u4f4d<\/p>\n
\n\t4 input [3:0] key, \/\/\u56db\u4e2a\u6309\u952e\u7ec4\u5408\u4fe1\u53f7<\/p>\n
\n\t5 <\/p>\n
\n\t6 output [10:0] wr_data, \/\/\u8f93\u51fa\u4e00\u5e27\u6570\u636e\uff0c\u4e3aDA\u6a21\u5757\u7684\u8f93\u5165\u6570\u5b57\u91cf<\/p>\n
\n\t7 output [19:0] out_data \/\/\u8f93\u51fa\u6570\u7801\u7ba1\u663e\u793a\u6570\u636e<\/p>\n
\n\t8 );<\/p>\n
\n\t9 <\/p>\n
\n\t10 \/\/\u8ba1\u6570\u5668\u65f6\u949f\u5206\u9891<\/p>\n
\n\t11 reg [30:0] cnt;<\/p>\n
\n\t12 reg clk_r; \/\/\u5206\u9891\u65f6\u949f\uff1a\u5728\u6d88\u9664\u6296\u52a8\u7684\u65f6\u949f\u9891\u7387\u4e0b\u8fdb\u884c\u6309\u952e\u7684\u68c0\u6d4b<\/p>\n
\n\t13 always@(posedge clk or negedge rst_n) \/\/\u6309\u952e\u6d88\u6296\uff0c\u65f6\u95f4\u4e3a0.2s\u8fdb\u884c\u4e00\u6b21\u68c0\u6d4b<\/p>\n
\n\t14 if(!rst_n)<\/p>\n
\n\t15 begin<\/p>\n
\n\t16 cnt <= 0;<\/p>\n
\n\t17 clk_r <= 0;<\/p>\n
\n\t18 end<\/p>\n
\n\t19 else if(cnt < 30'd1000_0000)<\/p>\n
\n\t20 cnt <= cnt + 1'b1;<\/p>\n
\n\t21 else<\/p>\n
\n\t22 begin <\/p>\n
\n\t23 cnt <= 0;<\/p>\n
\n\t24 clk_r <= ~clk_r;<\/p>\n
\n\t25 end<\/p>\n
\n\t26 <\/p>\n
\n\t27 \/\/\u6309\u952e\u4e3a\u4f4e\u7535\u5e73\u6709\u6548\uff0c\u5f53\u68c0\u6d4b\u5230\u5bf9\u5e94\u6309\u952e\u4e4b\u540e\uff0c\u76f8\u5e94\u6570\u503c\u52a01\uff0c\u5e76\u663e\u793a\u76f8\u5e94\u7684\u901a\u9053<\/p>\n
\n\t28 reg [7:0] data; \/\/\u6309\u952e\u8f93\u5165\u6570\u636e<\/p>\n
\n\t29 reg [1:0] channel; \/\/\u901a\u9053\u9009\u62e9<\/p>\n
\n\t30 reg [7:0] key1,key2,key3,key4; \/\/\u76f8\u5e94\u56db\u4e2a\u6309\u952e<\/p>\n
\n\t31 always@(posedge clk_r or negedge rst_n )<\/p>\n
\n\t32 if(!rst_n) <\/p>\n
\n\t33 begin<\/p>\n
\n\t34 key1 <= 8'h00;<\/p>\n
\n\t35 key2 <= 8'h00;<\/p>\n
\n\t36 key3 <= 8'h00;<\/p>\n
\n\t37 key4 <= 8'h00;<\/p>\n
\n\t38 data <= 8'h00;<\/p>\n
\n\t39 channel <= 2'b00;<\/p>\n
\n\t40 end<\/p>\n
\n\t41 else<\/p>\n
\n\t42 case(key) <\/p>\n
\n\t43 4'b1110 : begin \/\/\u6309\u952e1\uff1a\u9009\u62e9\u901a\u9053A\uff0c\u4e14\u8f93\u5165\u6570\u5b57\u91cf\u52a01<\/p>\n
\n\t44 channel <= 2'b00;<\/p>\n
\n\t45 key1 <= key1 + 1'b1;<\/p>\n
\n\t46 data <= key1;<\/p>\n
\n\t47 end<\/p>\n
\n\t48 4'b1101 : begin \/\/\u6309\u952e2\uff1a\u9009\u62e9\u901a\u9053B\uff0c\u4e14\u8f93\u5165\u6570\u5b57\u91cf\u52a01<\/p>\n
\n\t49 channel <= 2'b01;<\/p>\n
\n\t50 key2 <= key2 + 1'b1;<\/p>\n
\n\t51 data <= key2;<\/p>\n
\n\t52 end<\/p>\n
\n\t53 4'b1011 : begin \/\/\u6309\u952e3\uff1a\u9009\u62e9\u901a\u9053C\uff0c\u4e14\u8f93\u5165\u6570\u5b57\u91cf\u52a01<\/p>\n
\n\t54 channel <= 2'b10;<\/p>\n
\n\t55 key3 <= key3 + 1'b1;<\/p>\n
\n\t56 data <= key3;<\/p>\n
\n\t57 end<\/p>\n
\n\t58 4'b0111 : begin \/\/\u6309\u952e4\uff1a\u9009\u62e9\u901a\u9053D\uff0c\u4e14\u8f93\u5165\u6570\u5b57\u91cf\u52a01<\/p>\n
\n\t59 channel <= 2'b11;<\/p>\n
\n\t60 key4 <= key4 + 1'b1;<\/p>\n
\n\t61 data <= key4;<\/p>\n
\n\t62 end<\/p>\n
\n\t63 default :;<\/p>\n
\n\t64 endcase<\/p>\n
\n\t65 <\/p>\n
\n\t66 \/\/\u7528\u8d4b\u503c\u8bed\u53e5\u5c06\u9700\u8981\u7684\u6570\u636e\u7ec4\u5408\u8d77\u6765\uff0c\u5728\u6b64\u4f8b\u4e2d\u5c06RNG\u9ed8\u8ba4\u4e3a1<\/p>\n
\n\t67 assign wr_data = {channel,1'b1,data}; assignout_data={{3'b000,channel[1]},3'b000,channel[0],4'h1,data};<\/p>\n
\n\t68<\/p>\n
\n\t69 endmodule <\/p>\n
\n\tTLC_DA\u6a21\u5757\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
\n\t0 module TLC_DA( \/\/\u8f93\u5165\u6570\u5b57\u91cf\u8f6c\u6362\u4e3a\u6a21\u62df\u91cf\u6a21\u5757\uff0c\u672c\u5b9e\u9a8c\u7528TLC5620<\/p>\n
\n\t1 \/\/\u7aef\u53e3\u4fe1\u53f7\uff1a\u6a21\u5757\u7684\u8f93\u5165\u8f93\u51fa\u63a5\u53e3<\/p>\n
\n\t2 input clk, \/\/\u7cfb\u7edf\u65f6\u949f50MHz<\/p>\n
\n\t3 input rst_n, \/\/\u4f4e\u7535\u5e73\u590d\u4f4d<\/p>\n
\n\t4 input [10:0] data_in, \/\/\u8f93\u5165\u4e00\u5e27\u6570\u636e<\/p>\n
\n\t5 output da_data, \/\/\u4e32\u884c\u6570\u636e\u63a5\u53e3<\/p>\n
\n\t6 output da_clk, \/\/\u4e32\u884c\u65f6\u949f\u63a5\u53e3 <\/p>\n
\n\t7 output reg da_ldac, \/\/\u66f4\u65b0\u63a7\u5236\u4fe1\u53f7<\/p>\n
\n\t8 output reg da_load \/\/\u4e32\u884c\u52a0\u8f7d\u63a7\u5236\u63a5\u53e3<\/p>\n
\n\t9 );<\/p>\n
\n\t10<\/p>\n
\n\t11 \/\/\u8ba1\u6570\u5668\u65f6\u949f\u5206\u9891\uff1a\u6839\u636e\u82af\u7247\u5185\u90e8\u7684\u65f6\u5e8f\u8981\u6c42\u8fdb\u884c\u5206\u9891<\/p>\n
\n\t12 reg [30:0] cnt;<\/p>\n
\n\t13 wire da_clk_r; \/\/TLC 5620\u5185\u90e8\u65f6\u949f\u4fe1\u53f7<\/p>\n
\n\t14 always@(posedge clk or negedge rst_n) \/\/\u6ee1\u8db3\u534f\u8bae\u4e2d\u7684\u65f6\u949f\u8981\u6c42\uff0c\u5728TLC 5620\u4e2d\u65f6\u949f\u8981\u6c42\u4e0d\u5927\u4e8e1MHZ<\/p>\n
\n\t15 if(!rst_n)<\/p>\n
\n\t16 cnt <= 6'd0;<\/p>\n
\n\t17 else <\/p>\n
\n\t18 cnt <= cnt + 1'b1;<\/p>\n
\n\t19 <\/p>\n
\n\t20 assign da_clk_r = cnt[5];<\/p>\n
\n\t21 <\/p>\n
\n\t22 \/\/\u63a5\u6536\u65f6\u5e8f\u72b6\u6001\u673a <\/p>\n
\n\t23 reg [2:0] state;<\/p>\n
\n\t24 reg [3:0] cnt_da;<\/p>\n
\n\t25 reg da_data_r;<\/p>\n
\n\t26 reg da_data_en; \/\/\u9650\u5b9ada_data,da_clk\u7684\u6709\u6548\u533a\u57df<\/p>\n
\n\t27 always@(posedge da_clk_r or negedge rst_n)<\/p>\n
\n\t28 if(!rst_n)<\/p>\n
\n\t29 begin<\/p>\n
\n\t30 state <= 0;<\/p>\n
\n\t31 cnt_da <= 0;<\/p>\n
\n\t32 da_load <= 1;<\/p>\n
\n\t33 da_ldac <= 0; <\/p>\n
\n\t34 da_data_r <= 1'b1;<\/p>\n
\n\t35 da_data_en <= 0;<\/p>\n
\n\t36 end<\/p>\n
\n\t37 else<\/p>\n
\n\t38 case(state)<\/p>\n
\n\t39 0: state <= 1;<\/p>\n
\n\t40 1: begin<\/p>\n
\n\t41 da_load <= 1;<\/p>\n
\n\t42 da_data_en <= 1;<\/p>\n
\n\t43 if(cnt_da <= 10)<\/p>\n
\n\t44 begin<\/p>\n
\n\t45 cnt_da <= cnt_da + 1'b1;<\/p>\n
\n\t46 case(cnt_da)<\/p>\n
\n\t47 0: da_data_r <= data_in[10];<\/p>\n
\n\t48 1: da_data_r <= data_in[9];<\/p>\n
\n\t49 2: da_data_r <= data_in[8];<\/p>\n
\n\t50 3: da_data_r <= data_in[7];<\/p>\n
\n\t51 4: da_data_r <= data_in[6];<\/p>\n
\n\t52 5: da_data_r <= data_in[5];<\/p>\n
\n\t53 6: da_data_r <= data_in[4];<\/p>\n
\n\t54 7: da_data_r <= data_in[3];<\/p>\n
\n\t55 8: da_data_r <= data_in[2];<\/p>\n
\n\t56 9: da_data_r <= data_in[1];<\/p>\n
\n\t57 10: da_data_r <= data_in[0];<\/p>\n
\n\t58 default:;<\/p>\n
\n\t59 endcase<\/p>\n
\n\t60 state <= 1;<\/p>\n
\n\t61 end<\/p>\n
\n\t62 else<\/p>\n
\n\t63 begin<\/p>\n
\n\t64 cnt_da <= 0;<\/p>\n
\n\t65 state <= 2;<\/p>\n
\n\t66 da_data_en <= 0;<\/p>\n
\n\t67 end<\/p>\n
\n\t68 end<\/p>\n
\n\t69 2: begin<\/p>\n
\n\t70 da_load <= 0;<\/p>\n
\n\t71 state <= 3;<\/p>\n
\n\t72 end<\/p>\n
\n\t73 3: begin<\/p>\n
\n\t74 da_load <= 1;<\/p>\n
\n\t75 state <= 0;<\/p>\n
\n\t76 end<\/p>\n
\n\t77 default: state <= 0;<\/p>\n
\n\t78 endcase<\/p>\n
\n\t79<\/p>\n
\n\t80 assign da_data = (da_data_en) ? da_data_r : 1'b1;<\/p>\n
\n\t81 assign da_clk = (da_data_en)?da_clk_r : 1'b0;<\/p>\n
\n\t82<\/p>\n
\n\t83 endmodule <\/p>\n
\n\tseg_num\u6a21\u5757\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
\n\t0 module seg_num( \/\/\u6570\u7801\u7ba1\u663e\u793a\u6a21\u5757\uff1a\u9009\u62e9\u6570\u7801\u7ba10-4\u51715\u4e2a\u6570\u7801\u7ba1\u663e\u793a{A1\uff0cA0\uff0cRNG\uff0cDATA}<\/p>\n
\n\t1 \/\/\u7aef\u53e3\u4fe1\u53f7\uff1a\u6a21\u5757\u7684\u8f93\u5165\u8f93\u51fa\u63a5\u53e3<\/p>\n
\n\t2 input clk, \/\/\u7cfb\u7edf\u65f6\u949f50MHz<\/p>\n
\n\t3 input rst_n, \/\/\u4f4e\u7535\u5e73\u590d\u4f4d<\/p>\n
\n\t4 input [19:0] data_in, \/\/20\u4f4d\u8f93\u5165\u6570\u636e<\/p>\n
\n\t5 <\/p>\n
\n\t6 output reg [7:0] seg, \/\/\u6570\u7801\u7ba1\u6bb5\u9009<\/p>\n
\n\t7 output reg [2:0] sel \/\/\u6570\u7801\u7ba1\u4f4d\u9009<\/p>\n
\n\t8 );<\/p>\n
\n\t9 <\/p>\n
\n\t10 \/\/\u901a\u8fc7\u67e5\u627e\u8868\u7684\u65b9\u5f0f\uff0c\u5c06\u76f8\u5e94\u4f4d\u7684\u6570\u7801\u7ba1\u4e0e\u6570\u636e\u7684\u76f8\u5e94\u4f4d\u4e00\u4e00\u5bf9\u5e94<\/p>\n
\n\t11 reg [3:0] num; <\/p>\n
\n\t12 always@(*)<\/p>\n
\n\t13 case(sel) <\/p>\n
\n\t14 4: num = data_in[3:0]; \/\/\u7b2c\u4e94\u4e2a\u6570\u7801\u7ba1\u663e\u793a\u6570\u636e\u7684\u4f4e\u56db\u4f4d[3\uff1a0]<\/p>\n
\n\t15 3: num = data_in[7:4]; \/\/\u7b2c\u56db\u4e2a\u6570\u7801\u7ba1\u663e\u793a\u6570\u636e\u7684\u4f4e\u56db\u4f4d[7\uff1a4]<\/p>\n
\n\t16 2: num = data_in[11:8]; \/\/\u7b2c\u4e09\u4e2a\u6570\u7801\u7ba1\u663e\u793a\u6570\u636e\u7684\u4f4e\u56db\u4f4d[11:8]<\/p>\n
\n\t17 1: num = data_in[15:12]; \/\/\u7b2c\u4e8c\u4e2a\u6570\u7801\u7ba1\u663e\u793a\u6570\u636e\u7684\u4f4e\u56db\u4f4d[15:12]<\/p>\n
\n\t18 0: num = data_in[19:16]; \/\/\u7b2c\u4e00\u4e2a\u6570\u7801\u7ba1\u663e\u793a\u6570\u636e\u7684\u4f4e\u56db\u4f4d[19:16]<\/p>\n
\n\t19 default:;<\/p>\n
\n\t20 endcase<\/p>\n
\n\t21<\/p>\n
\n\t22 \/\/\u901a\u8fc7\u67e5\u627e\u8868\u7684\u65b9\u5f0f\uff0c\u5c06\u6570\u636e\u4e0e\u6570\u7801\u7ba1\u7684\u663e\u793a\u65b9\u5f0f\u4e00\u4e00\u5bf9\u5e94 <\/p>\n
\n\t23 always@(*) <\/p>\n
\n\t24 case(num)<\/p>\n
\n\t25 0: seg <= 8'hC0; \/\/8'b1100_0000<\/p>\n
\n\t26 1: seg <= 8'hF9; \/\/8'b1111_1001<\/p>\n
\n\t27 2: seg <= 8'hA4; \/\/8'b1010_0100 <\/p>\n
\n\t28 3: seg <= 8'hB0; \/\/8'b1011_0000<\/p>\n
\n\t29 4: seg <= 8'h99; \/\/8'b1001_1001<\/p>\n
\n\t30 5: seg <= 8'h92; \/\/8'b1001_0010<\/p>\n
\n\t31 6: seg <= 8'h82; \/\/8'b1000_0010<\/p>\n
\n\t32 7: seg <= 8'hF8; \/\/8'b1111_1000<\/p>\n
\n\t33 8: seg <= 8'h80; \/\/8'b1000_0000<\/p>\n
\n\t34 9: seg <= 8'h90; \/\/8'b1001_0000<\/p>\n
\n\t35 default:seg <= 8'hFF; \/\/8'b1111_1111<\/p>\n
\n\t36 endcase<\/p>\n
\n\t37 <\/p>\n
\n\t38 \/\/\u8ba1\u6570\u5668\u65f6\u949f\u5206\u9891\uff1a\u7528cnt\u7b2c10\u4f4d\u7684\u53d8\u5316\u4f5c\u4e3a\u5206\u9891\u65f6\u949f<\/p>\n
\n\t39 reg [23:0] cnt; <\/p>\n
\n\t40 always@(posedge clk or negedge rst_n) <\/p>\n
\n\t41 if(!rst_n)<\/p>\n
\n\t42 cnt <= 4'd0;<\/p>\n
\n\t43 else<\/p>\n
\n\t44 cnt <= cnt + 1'b1;<\/p>\n
\n\t45 \/\/\u5728\u5206\u9891\u65f6\u949f\u4e0b\uff0c\u6570\u7801\u7ba1\u76840-5\u4f4d\u4f9d\u6b21\u5faa\u73af<\/p>\n
\n\t46 always@(posedge cnt[10] or negedge rst_n) \/\/\u5206\u9891\u65f6\u949f\u4e3a2^10\/50M<\/p>\n
\n\t47 if(!rst_n)<\/p>\n
\n\t48 sel <= 0;<\/p>\n
\n\t49 else if(sel < 4)<\/p>\n
\n\t50 sel <= sel + 1'b1;<\/p>\n
\n\t51 else<\/p>\n
\n\t52 sel <= 0; <\/p>\n
\n\t53 <\/p>\n
\n\t54 endmodule <\/p>\n
\n\ttop\u9876\u5c42\u6a21\u5757\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
\n\t0 module top( \/\/\u9876\u5c42\u6a21\u5757\uff1a\u5c06\u5404\u4e2a\u6a21\u5757\u7ec4\u5408<\/p>\n
\n\t1 \/\/\u5916\u90e8\u63a5\u53e3<\/p>\n
\n\t2 input clk, \/\/\u7cfb\u7edf\u65f6\u949f50MHz<\/p>\n
\n\t3 input rst_n, \/\/\u4f4e\u7535\u5e73\u590d\u4f4d<\/p>\n
\n\t4 input [3:0] key, \/\/\u56db\u4e2a\u6309\u952e\u7ec4\u6210\u7684\u6309\u952e\u4fe1\u53f7\uff0c\u4f4e\u7535\u5e73\u6709\u6548<\/p>\n
\n\t5 <\/p>\n
\n\t6 output da_data,\/\/DA\u4e32\u884c\u63a5\u53e3\u6570\u636e<\/p>\n
\n\t7 output da_clk, \/\/DA\u4e32\u884c\u63a5\u53e3\u65f6\u949f <\/p>\n
\n\t8 output da_ldac,\/\/DA\u66f4\u65b0\u4fe1\u53f7<\/p>\n
\n\t9 output da_load, \/\/DA\u4e32\u884c\u63a5\u53e3\u52a0\u8f7d\u63a7\u5236\u4fe1\u53f7<\/p>\n
\n\t10 output [7:0] seg, \/\/\u6570\u7801\u7ba1\u6bb5\u9009<\/p>\n
\n\t11 output [2:0] sel \/\/\u6570\u7801\u7ba1\u4f4d\u9009<\/p>\n
\n\t12 );<\/p>\n
\n\t13 \/\/\u5185\u90e8\u4fe1\u53f7\uff1a\u6a21\u5757\u5185\u90e8\u7684\u63a5\u53e3\u4fe1\u53f7\uff0c\u6bd4\u5982\u6a21\u5757TLC_DA\u7684\u8f93\u51fa\u4fe1\u53f7data_in\uff0c\u901a\u8fc7\u5185\u90e8\u4fe1\u53f7r_data\u4e0e\u6a21\u5757key_test\u7684\u8f93\u5165\u4fe1\u53f7wr_data\u76f8\u8fde<\/p>\n
\n\t14 wire [10:0] wr_data;<\/p>\n
\n\t15 wire [19:0] out_data; \/\/\u8f93\u5165\u7ed9\u6570\u7801\u7ba1\u7684\u6570\u636e<\/p>\n
\n\t16<\/p>\n
\n\t17 \/\/\u6a21\u5757\u4f8b\u5316<\/p>\n
\n\t18 TLC_DA TLC_DA_inst( \/\/\u8f93\u5165\u6570\u5b57\u91cf\u8f6c\u6362\u4e3a\u6a21\u62df\u91cf\u6a21\u5757<\/p>\n
\n\t19 .clk(clk),<\/p>\n
\n\t20 .rst_n(rst_n),<\/p>\n
\n\t21 .da_clk(da_clk), <\/p>\n
\n\t22 .da_data(da_data),<\/p>\n
\n\t23 .da_ldac(da_ldac),<\/p>\n
\n\t24 .da_load(da_load),<\/p>\n
\n\t25 .data_in(wr_data)<\/p>\n
\n\t26 );<\/p>\n
\n\t27<\/p>\n
\n\t28 key_test key_test_inst( \/\/\u6309\u952e\u63a7\u5236\u6a21\u5757<\/p>\n
\n\t29 .clk(clk),<\/p>\n
\n\t30 .rst_n(rst_n),<\/p>\n
\n\t31 .key(key),<\/p>\n
\n\t32 .wr_data(wr_data),<\/p>\n
\n\t33 .out_data(out_data)<\/p>\n
\n\t34 );<\/p>\n
\n\t35 <\/p>\n
\n\t36 seg_num seg_num_inst( \/\/\u6570\u7801\u7ba1\u663e\u793a\u6a21\u5757<\/p>\n
\n\t37 .clk(clk),<\/p>\n
\n\t38 .rst_n(rst_n),<\/p>\n
\n\t39 .data_in(out_data),<\/p>\n
\n\t40 .seg(seg),<\/p>\n
\n\t41 .sel(sel)<\/p>\n
\n\t42 );<\/p>\n
\n\t43 <\/p>\n
\n\t44 endmodule <\/p>\n
\n\ttest\u9876\u5c42\u6a21\u5757\u6d4b\u8bd5\u4ee3\u7801\uff1a<\/p>\n
\n\t0 `ti<\/u>mescale 1 ns\/ 1 ns \/\/\u8bbe\u7f6e\u4eff\u771f\u65f6\u95f4\u5355\u4f4d\u4e0e\u7cbe\u5ea6\u5206\u522b\u4e3a1ns\/1ns<\/p>\n
\n\t1 \/\/\u82e5\u8bbe\u4e3a`timescale 1ns\/1ps (#200 \u5c31\u662f\u5ef6\u65f6200 ns; 1ps\u5c31\u662f\u4eff\u771f\u7684\u7cbe\u5ea6\uff09<\/p>\n
\n\t2 module test; \/\/\u6d4b\u8bd5\u6a21\u5757\uff1a\u4e3b\u8981\u662f\u5c06\u6fc0\u52b1\u4fe1\u53f7\u8d4b\u76f8\u5e94\u7684\u503c\uff0c\u4eff\u771f\u4e4b\u540e\u89c2\u5bdf\u6ce2\u5f62\uff0c\u9a8c\u8bc1\u4e0e\u5b9e\u9645\u529f\u80fd\u662f\u5426\u4e00\u6837<\/p>\n
\n\t3 <\/p>\n
\n\t4 \/\/\u7aef\u53e3\u4fe1\u53f7\u5b9a\u4e49\uff0c\u6fc0\u52b1\u4fe1\u53f7\u4e3areg\u578b<\/p>\n
\n\t5 reg clk;<\/p>\n
\n\t6 reg rst_n;<\/p>\n
\n\t7 reg [3:0] key; <\/p>\n
\n\t8 wire [7:0] seg;<\/p>\n
\n\t9 wire [2:0] sel;<\/p>\n
\n\t10<\/p>\n
\n\t11 \/\/\u6a21\u5757\u4f8b\u5316 <\/p>\n
\n\t12 top top( <\/p>\n
\n\t13 .clk(clk),<\/p>\n
\n\t14 .rst_n(rst_n),<\/p>\n
\n\t15 .key(key),<\/p>\n
\n\t16 .seg(seg),<\/p>\n
\n\t17 .sel(sel)<\/p>\n
\n\t18 );<\/p>\n
\n\t19<\/p>\n
\n\t20 \/\/\u521d\u59cb\u5316\u6fc0\u52b1\uff0c\u4ee5\u53ca\u7ed9\u76f8\u5e94\u6fc0\u52b1\u8d4b\u503c <\/p>\n
\n\t21 initial <\/p>\n
\n\t22 begin <\/p>\n
\n\t23 clk = 0;rst_n = 0; key = 4'b1111; \/\/\u5728\u590d\u4f4d\u9636\u6bb5\uff0c\u5c06\u6fc0\u52b1\u8d4b\u521d\u503c<\/p>\n
\n\t24 <\/p>\n
\n\t25 #200 rst_n = 1; \/\/\u5728\u5ef6\u65f6200ns\u540e\u5c06\u590d\u4f4d\u4fe1\u53f7\u7f6e\u4e3a1<\/p>\n
\n\t26<\/p>\n
\n\t27 \/\/\u5b9e\u73b0\u6309\u952e1\u5f00\uff0c\u5173<\/p>\n
\n\t28 #500000 key = 4'b1110;<\/p>\n
\n\t29 #500000 key = 4'b1111;<\/p>\n
\n\t30 <\/p>\n
\n\t31 end <\/p>\n
\n\t32 <\/p>\n
\n\t33 always #10 clk = ~clk; \/\/\u65f6\u949f\u7684\u8868\u793a\uff0c\u5373\u6bcf\u969410ns\u7ffb\u8f6c\u4e00\u6b21\uff0c\u4e00\u4e2a\u5468\u671f\u7684\u65f6\u95f4\u5373\u4e3a20ns\uff0c\u65f6\u949f\u4e3a1\/20ns = 50MHZ <\/p>\n
\n\t34<\/p>\n
\n\t35 endmodule <\/p>\n
\n\t\u4eff\u771f\u56fe: <\/p>\n
\n\t![](\"http:\/\/www.szryc.com\/uploads\/allimg\/180916\/1250446140-8.png\")
<\/p>\n
\n\t\u7531\u4e8e\u4eff\u771f\u65f6\u95f4\u539f\u56e0\uff0c\u8fd9\u91cc\u53ea\u6d4b\u8bd5\u6309\u952e1\u6309\u4e0b\u65f6\u7684\u6570\u7801\u7ba1\u663e\u793a\uff0c\u663e\u793a\u4e3a00100\uff0c\u8868\u793a\u901a\u9053A\uff0cRNG\u4e3a1\uff0c\u8f93\u5165\u6570\u5b57\u91cf\u4e3a00\u3002\u4e4b\u540e\u5b9e\u9645\u4e0b\u677f\u9a8c\u8bc1\uff0c\u7528\u4e07\u7528\u8868<\/u>\u4e5f\u53ef\u6d4b\u51fa\u8f93\u5165\u6570\u5b57\u91cf\u5bf9\u5e94\u7684\u7535\u538b\u503c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6570\u6a21\u8f6c\u6362\u5668 \uff08Digital to Analog Conver te r\uff09\u5373 DAC \uff0c\u662f\u6570\u5b57\u4e16\u754c\u548c\u6a21\u62df\u4e16\u754c\u4e4b\u95f4\u7684\u6865\u6881\u3002\u4eba\u7c7b\u751f\u6d3b\u5728\u6a21\u62df\u4e16\u754c\u4e2d\uff0c\u867d\u7136\u6570\u5b57\u5668\u4ef6\u53ca\u8bbe\u5907\u7684\u6bd4\u91cd\u65e5\u76ca\u589e\u5f3a\uff0c\u4f46\u662fDAC\u7684\u53d1\u5c55\u4ecd\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002 \u4ece\u822a<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-945","post","type-post","status-publish","format-standard","hentry","category-14"],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/945","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=945"}],"version-history":[{"count":0,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/945\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=945"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}