Forum: FPGA, VHDL & Co. MUX-Anzahl verringern


MUX-Anzahl verringern
von peter (Gast)

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Hallo, , guten Tag.
Ich habe 16 rote, 8 blaue und 8 grüne rechteckige LED auf dem VGA-Screen 
abgebildet die auch richtig anzeigen gemäß Eingabe PS2-Tastatur. Der 
Hintergrund der LED wird als grau angezeigt.

Bloß die anzahl der einzelnen MUX ist sehrhoch, wie kann man das anders 
schreiben?

1
--------------------------------------- 8 b_led

2
    if CounterX >=10 and CounterX < 20 and CounterY >=10 and CounterY < 20 and b_led(7)='1' then

3
      red <="0000";

4
      blue <="1111";

5
      green <="0000"; 

6
    elsif CounterX >=10 and CounterX < 20 and CounterY >=10 and CounterY < 20 and b_led(7)='0' then

7
      red <="0111";

8
      blue <="0111";

9
      green <="0111";

10
    end if; 

11
12
     if CounterX >=25 and CounterX < 35 and CounterY >=10 and CounterY < 20 and b_led(6)='1' then

13
      red <="0000";

14
      blue <="1111";

15
      green <="0000"; 

16
    elsif CounterX >=25 and CounterX < 35 and CounterY >=10 and CounterY < 20 and b_led(6)='0' then

17
      red <="0111";

18
      blue <="0111";

19
      green <="0111";

20
    end if; 

21
     

22
    if CounterX >=40 and CounterX < 50 and CounterY >=10 and CounterY < 20 and b_led(5)='1' then

23
      red <="0000";

24
      blue <="1111";

25
      green <="0000"; 

26
    elsif CounterX >=40 and CounterX < 50 and CounterY >=10 and CounterY < 20 and b_led(5)='0' then

27
      red <="0111";

28
      blue <="0111";

29
      green <="0111";

30
    end if; 

31
32
    if CounterX >=55 and CounterX < 65 and CounterY >=10 and CounterY < 20 and b_led(4)='1' then

33
      red <="0000";

34
      blue <="1111";

35
      green <="0000"; 

36
    elsif CounterX >=55 and CounterX < 65 and CounterY >=10 and CounterY < 20 and b_led(4)='0' then

37
      red <="0111";

38
      blue <="0111";

39
      green <="0111";

40
    end if;    

41
42
    if CounterX >=70 and CounterX < 80 and CounterY >=10 and CounterY < 20 and b_led(3)='1' then

43
      red <="0000";

44
      blue <="1111";

45
      green <="0000"; 

46
    elsif CounterX >=70 and CounterX < 80 and CounterY >=10 and CounterY < 20 and b_led(3)='0' then

47
      red <="0111";

48
      blue <="0111";

49
      green <="0111";

50
    end if;    

51
52
    if CounterX >=85 and CounterX < 95 and CounterY >=10 and CounterY < 20 and b_led(2)='1' then

53
      red <="0000";

54
      blue <="1111";

55
      green <="0000"; 

56
    elsif CounterX >=85 and CounterX < 95 and CounterY >=10 and CounterY < 20 and b_led(2)='0' then

57
      red <="0111";

58
      blue <="0111";

59
      green <="0111";

60
    end if;    

61
62
    if CounterX >=100 and CounterX < 110 and CounterY >=10 and CounterY < 20 and b_led(1)='1' then

63
      red <="0000";

64
      blue <="1111";

65
      green <="0000"; 

66
    elsif CounterX >=100 and CounterX < 110 and CounterY >=10 and CounterY < 20 and b_led(1)='0' then

67
      red <="0111";

68
      blue <="0111";

69
      green <="0111";

70
    end if;    

71
72
    if CounterX >=115 and CounterX < 125 and CounterY >=10 and CounterY < 20 and b_led(0)='1' then

73
      red <="0000";

74
      blue <="1111";

75
      green <="0000"; 

76
    elsif CounterX >=115 and CounterX < 125 and CounterY >=10 and CounterY < 20 and b_led(0)='0' then

77
      red <="0111";

78
      blue <="0111";

79
      green <="0111";

80
    end if;           

81
  

82
  --------------------------------------- 8 g_led

83
    if CounterX >=150 and CounterX < 160 and CounterY >=10 and CounterY < 20 and g_led(7)='1' then

84
      red <="0000";

85
      blue <="0000";

86
      green <="1111"; 

87
    elsif CounterX >=150 and CounterX < 160 and CounterY >=10 and CounterY < 20 and g_led(7)='0' then

88
      red <="0111";

89
      blue <="0111";

90
      green <="0111";

91
    end if; 

92
93
    if CounterX >=165 and CounterX <175 and CounterY >=10 and CounterY < 20 and g_led(6)='1' then

94
      red <="0000";

95
      blue <="0000";

96
      green <="1111"; 

97
    elsif CounterX >=165 and CounterX < 175 and CounterY >=10 and CounterY < 20 and g_led(6)='0' then

98
      red <="0111";

99
      blue <="0111";

100
      green <="0111";

101
    end if; 

102
     

103
    if CounterX >=180 and CounterX < 190 and CounterY >=10 and CounterY < 20 and g_led(5)='1' then

104
      red <="0000";

105
      blue <="0000";

106
      green <="1111"; 

107
    elsif CounterX >=180 and CounterX < 190 and CounterY >=10 and CounterY < 20 and g_led(5)='0' then

108
      red <="0111";

109
      blue <="0111";

110
      green <="0111";

111
    end if; 

112
113
    if CounterX >=195 and CounterX < 205 and CounterY >=10 and CounterY < 20 and g_led(4)='1' then

114
      red <="0000";

115
      blue <="0000";

116
      green <="1111"; 

117
    elsif CounterX >=195 and CounterX < 205 and CounterY >=10 and CounterY < 20 and g_led(4)='0' then

118
      red <="0111";

119
      blue <="0111";

120
      green <="0111";

121
    end if;    

122
123
    if CounterX >=210 and CounterX < 220 and CounterY >=10 and CounterY < 20 and g_led(3)='1' then

124
      red <="0000";

125
      blue <="0000";

126
      green <="1111"; 

127
    elsif CounterX >=210 and CounterX < 220 and CounterY >=10 and CounterY < 20 and g_led(3)='0' then

128
      red <="0111";

129
      blue <="0111";

130
      green <="0111";

131
    end if;    

132
133
    if CounterX >=225 and CounterX < 235 and CounterY >=10 and CounterY < 20 and g_led(2)='1' then

134
      red <="0000";

135
      blue <="0000";

136
      green <="1111"; 

137
    elsif CounterX >=225 and CounterX < 235 and CounterY >=10 and CounterY < 20 and g_led(2)='0' then

138
      red <="0111";

139
      blue <="0111";

140
      green <="0111";

141
    end if;    

142
143
    if CounterX >=240 and CounterX < 250 and CounterY >=10 and CounterY < 20 and g_led(1)='1' then

144
      red <="0000";

145
      blue <="0000";

146
      green <="1111"; 

147
    elsif CounterX >=240 and CounterX < 250 and CounterY >=10 and CounterY < 20 and g_led(1)='0' then

148
      red <="0111";

149
      blue <="0111";

150
      green <="0111";

151
    end if;    

152
153
    if CounterX >=255 and CounterX < 265 and CounterY >=10 and CounterY < 20 and g_led(0)='1' then

154
      red <="0000";

155
      blue <="0000";

156
      green <="1111"; 

157
    elsif CounterX >=255 and CounterX < 265 and CounterY >=10 and CounterY < 20 and g_led(0)='0' then

158
      red <="0111";

159
      blue <="0111";

160
      green <="0111";

161
    end if;  

162
163
---------------------------  16 r_led

164
    if CounterX >=10 and CounterX < 20 and CounterY >=40 and CounterY < 50 and r_led(15)='1' then

165
      red <="1111";

166
      blue <="0000";

167
      green <="0000"; 

168
    elsif CounterX >=10 and CounterX < 20 and CounterY >=40 and CounterY < 50 and r_led(15)='0' then

169
      red <="0111";

170
      blue <="0111";

171
      green <="0111";

172
    end if; 

173
174
    if CounterX >=25 and CounterX < 35 and CounterY >=40 and CounterY < 50 and r_led(14)='1' then

175
      red <="1111";

176
      blue <="0000";

177
      green <="0000"; 

178
    elsif CounterX >=25 and CounterX < 35 and CounterY >=40 and CounterY < 50 and r_led(14)='0' then

179
      red <="0111";

180
      blue <="0111";

181
      green <="0111";

182
    end if; 

183
     

184
    if CounterX >=40 and CounterX < 50 and CounterY >=40 and CounterY < 50 and r_led(13)='1' then

185
      red <="1111";

186
      blue <="0000";

187
      green <="0000"; 

188
    elsif CounterX >=40 and CounterX < 50 and CounterY >=40 and CounterY < 50 and r_led(13)='0' then

189
      red <="0111";

190
      blue <="0111";

191
      green <="0111";

192
    end if; 

193
194
    if CounterX >=55 and CounterX < 65 and CounterY >=40 and CounterY < 50 and r_led(12)='1' then

195
      red <="1111";

196
      blue <="0000";

197
      green <="0000"; 

198
    elsif CounterX >=55 and CounterX < 65 and CounterY >=40 and CounterY < 50 and r_led(12)='0' then

199
      red <="0111";

200
      blue <="0111";

201
      green <="0111";

202
    end if;    

203
204
    if CounterX >=70 and CounterX < 80 and CounterY >=40 and CounterY < 50 and r_led(11)='1' then

205
      red <="1111";

206
      blue <="0000";

207
      green <="0000"; 

208
    elsif CounterX >=70 and CounterX < 80 and CounterY >=40 and CounterY < 50 and r_led(11)='0' then

209
      red <="0111";

210
      blue <="0111";

211
      green <="0111";

212
    end if;    

213
214
    if CounterX >=85 and CounterX < 95 and CounterY >=40 and CounterY < 50 and r_led(10)='1' then

215
      red <="1111";

216
      blue <="0000";

217
      green <="0000"; 

218
    elsif CounterX >=85 and CounterX < 95 and CounterY >=40 and CounterY < 50 and r_led(10)='0' then

219
      red <="0111";

220
      blue <="0111";

221
      green <="0111";

222
    end if;    

223
224
    if CounterX >=100 and CounterX < 110 and CounterY >=40 and CounterY < 50 and r_led(9)='1' then

225
      red <="1111";

226
      blue <="0000";

227
      green <="0000"; 

228
    elsif CounterX >=100 and CounterX < 110 and CounterY >=40 and CounterY < 50 and r_led(9)='0' then

229
      red <="0111";

230
      blue <="0111";

231
      green <="0111";

232
    end if;    

233
234
    if CounterX >=115 and CounterX < 125 and CounterY >=40 and CounterY < 50 and r_led(8)='1' then

235
      red <="1111";

236
      blue <="0000";

237
      green <="0000"; 

238
    elsif CounterX >=115 and CounterX < 125 and CounterY >=40 and CounterY < 50 and r_led(8)='0' then

239
      red <="0111";

240
      blue <="0111";

241
      green <="0111";

242
    end if;           

243
 -------------------------------------- 

244
    if CounterX >=130 and CounterX < 140 and CounterY >=40 and CounterY < 50 and r_led(7)='1' then

245
      red <="1111";

246
      blue <="0000";

247
      green <="0000"; 

248
    elsif CounterX >=130 and CounterX < 140 and CounterY >=40 and CounterY < 50 and r_led(7)='0' then

249
      red <="0111";

250
      blue <="0111";

251
      green <="0111";

252
    end if; 

253
254
    if CounterX >=145 and CounterX <155 and CounterY >=40 and CounterY < 50 and r_led(6)='1' then

255
      red <="1111";

256
      blue <="0000";

257
      green <="0000"; 

258
    elsif CounterX >=145 and CounterX < 155 and CounterY >=40 and CounterY < 50 and r_led(6)='0' then

259
      red <="0111";

260
      blue <="0111";

261
      green <="0111";

262
    end if; 

263
     

264
    if CounterX >=160 and CounterX < 170 and CounterY >=40 and CounterY < 50 and r_led(5)='1' then

265
      red <="1111";

266
      blue <="0000";

267
      green <="0000"; 

268
    elsif CounterX >=160 and CounterX < 170 and CounterY >=40 and CounterY < 50 and r_led(5)='0' then

269
      red <="0111";

270
      blue <="0111";

271
      green <="0111";

272
    end if; 

273
274
    if CounterX >=175 and CounterX < 185 and CounterY >=40 and CounterY < 50 and r_led(4)='1' then

275
      red <="1111";

276
      blue <="0000";

277
      green <="0000"; 

278
    elsif CounterX >=175 and CounterX < 185 and CounterY >=40 and CounterY < 50 and r_led(4)='0' then

279
      red <="0111";

280
      blue <="0111";

281
      green <="0111";

282
    end if;    

283
284
    if CounterX >=190 and CounterX < 200 and CounterY >=40 and CounterY < 50 and r_led(3)='1' then

285
      red <="1111";

286
      blue <="0000";

287
      green <="0000"; 

288
    elsif CounterX >=190 and CounterX < 200 and CounterY >=40 and CounterY < 50 and r_led(3)='0' then

289
      red <="0111";

290
      blue <="0111";

291
      green <="0111";

292
    end if;    

293
294
    if CounterX >=205 and CounterX < 215 and CounterY >=40 and CounterY < 50 and r_led(2)='1' then

295
      red <="1111";

296
      blue <="0000";

297
      green <="0000"; 

298
    elsif CounterX >=205 and CounterX < 215 and CounterY >=40 and CounterY < 50 and r_led(2)='0' then

299
      red <="0111";

300
      blue <="0111";

301
      green <="0111";

302
    end if;    

303
304
    if CounterX >=220 and CounterX < 230 and CounterY >=40 and CounterY < 50 and r_led(1)='1' then

305
      red <="1111";

306
      blue <="0000";

307
      green <="0000"; 

308
    elsif CounterX >=220 and CounterX < 230 and CounterY >=40 and CounterY < 50 and r_led(1)='0' then

309
      red <="0111";

310
      blue <="0111";

311
      green <="0111";

312
    end if;    

313
314
    if CounterX >=235 and CounterX < 245 and CounterY >=40 and CounterY < 50 and r_led(0)='1' then

315
      red <="1111";

316
      blue <="0000";

317
      green <="0000"; 

318
    elsif CounterX >=235 and CounterX < 245 and CounterY >=40 and CounterY < 50 and r_led(0)='0' then

319
      red <="0111";

320
      blue <="0111";

321
      green <="0111";

322
    end if;


Gruss

  


  



  

  
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    Re: MUX-Anzahl verringern
  


  

    

      von
      
        Lothar M.
            (Firma: Titel)
        (lkmiller)
        (Moderator)
      
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peter schrieb:
> wie kann man das anders schreiben?
Vorneweg: das ist kein VHDL-Problem, sondern eines, das mit Nachdenken 
und Überlegen zu tun hat!

Es muss ja nicht laufend und parallel die Zählerwerte CounterX und 
CounterY mit allen LEDs verglichen werden. An der Y-Position 30 
interessiert z.B. keine einzige r_led. Und an der X-Position 240 
interessiert z.B. nur die r_led mit Index 0.

Also wäre es sinnvoller, für das aktuelle Pixel zu kontrollieren, ob 
es gesetzt werden muss. Dazu rechnet man aus dem CounterX den Index für 
r_led aus: du musst nur kontrollieren, ob das Bit 
r_led(15-(CounterX-10)/15)) = '1' ist. Wenn das der Fall ist, dann gilt 
z.B. hier "rot":
1
    -- default: schwarz

2
    red   <="0000";

3
    blue  <="0000";

4
    green <="0000"; 

5
6
    :

7
    :

8
9
    if (CounterY >=40 and CounterY < 50) then   -- sind wir in einer Zeile für rote Pixel?

10
       if r_led(15-(CounterX-10)/15))='1' then  -- Pixel setzen?

11
         if ((CounterX-10) mod 15) < 10 then    -- Ja, aber nur im Pixel-Bereich

12
           red <="1111";

13
         end if;       

14
       else

15
         red   <="0111";

16
         blue  <="0111";

17
         green <="0111";

18
       end if;

19
    end if;

20
21
    :

So, und wenn du das dann gemacht hast, wirst du schlagartig 
herausfinden, dass die Divisionen durch 15 (mit '/' und mod) nicht so 
richtig gut funktionieren. Hier wäre es schlauer, die Fenster 16 Pixel 
breit zu machen, z.B. 10 für das Feld und 6 leere Pixel zwischen den 
Feldern...

  


  



  

  
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    Re: MUX-Anzahl verringern
  


  

    

      von
      
        peter (Gast)
      
      


      
    


    

      
    

    

    

  
  


  

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Ja, danke.
Werde ich versuchen umzusetzen.

Gruss

  


  




  

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