iq80310_7seg.c revision 1.5
1 /* $NetBSD: iq80310_7seg.c,v 1.5 2002/01/20 03:41:48 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Support for the 7-segment display on the Intel IQ80310. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <machine/bus.h> 46 47 #include <evbarm/iq80310/iq80310reg.h> 48 #include <evbarm/iq80310/iq80310var.h> 49 #include <evbarm/iq80310/obiovar.h> 50 51 #define ASCIIMAP_START '0' 52 #define ASCIIMAP_END '9' 53 54 static int snakestate; 55 56 static const uint8_t asciimap[] = { 57 /* +#####+ 58 * # # 59 * # # 60 * # # 61 * +-----+ 62 * # # 63 * # # 64 * # # 65 * +#####+ 66 */ 67 SEG_G, 68 69 /* +-----+ 70 * | # 71 * | # 72 * | # 73 * +-----+ 74 * | # 75 * | # 76 * | # 77 * +-----+ 78 */ 79 SEG_A|SEG_D|SEG_E|SEG_F|SEG_G, 80 81 /* +#####+ 82 * | # 83 * | # 84 * | # 85 * +#####+ 86 * # | 87 * # | 88 * # | 89 * +#####+ 90 */ 91 SEG_C|SEG_F, 92 93 /* +#####+ 94 * | # 95 * | # 96 * | # 97 * +#####+ 98 * | # 99 * | # 100 * | # 101 * +#####+ 102 */ 103 SEG_E|SEG_F, 104 105 /* +-----+ 106 * # # 107 * # # 108 * # # 109 * +#####+ 110 * | # 111 * | # 112 * | # 113 * +-----+ 114 */ 115 SEG_A|SEG_D|SEG_E, 116 117 /* +#####+ 118 * # | 119 * # | 120 * # | 121 * +#####+ 122 * | # 123 * | # 124 * | # 125 * +#####+ 126 */ 127 SEG_B|SEG_E, 128 129 /* +#####+ 130 * # | 131 * # | 132 * # | 133 * +#####+ 134 * # # 135 * # # 136 * # # 137 * +#####+ 138 */ 139 SEG_B, 140 141 /* +#####+ 142 * | # 143 * | # 144 * | # 145 * +-----+ 146 * | # 147 * | # 148 * | # 149 * +-----+ 150 */ 151 SEG_D|SEG_E|SEG_F, 152 153 /* +#####+ 154 * # # 155 * # # 156 * # # 157 * +#####+ 158 * # # 159 * # # 160 * # # 161 * +#####+ 162 */ 163 0, 164 165 /* +#####+ 166 * # # 167 * # # 168 * # # 169 * +#####+ 170 * | # 171 * | # 172 * | # 173 * +-----+ 174 */ 175 SEG_D|SEG_E, 176 }; 177 178 void 179 iq80310_7seg(char a, char b) 180 { 181 uint8_t msb, lsb; 182 183 if (a < ASCIIMAP_START || a > ASCIIMAP_END) 184 msb = 0xff; 185 else 186 msb = asciimap[a - ASCIIMAP_START] | SEG_DP; 187 188 if (b < ASCIIMAP_START || b > ASCIIMAP_END) 189 lsb = 0xff; 190 else 191 lsb = asciimap[b - ASCIIMAP_START] | SEG_DP; 192 193 snakestate = 0; 194 195 CPLD_WRITE(IQ80310_7SEG_MSB, msb); 196 CPLD_WRITE(IQ80310_7SEG_LSB, lsb); 197 } 198 199 static const uint8_t snakemap[][2] = { 200 201 /* +#####+ +#####+ 202 * | | | | 203 * | | | | 204 * | | | | 205 * +-----+ +-----+ 206 * | | | | 207 * | | | | 208 * | | | | 209 * +-----+ +-----+ 210 */ 211 { ~SEG_A, ~SEG_A }, 212 213 /* +-----+ +-----+ 214 * # | | # 215 * # | | # 216 * # | | # 217 * +-----+ +-----+ 218 * | | | | 219 * | | | | 220 * | | | | 221 * +-----+ +-----+ 222 */ 223 { ~SEG_F, ~SEG_B }, 224 225 /* +-----+ +-----+ 226 * | | | | 227 * | | | | 228 * | | | | 229 * +#####+ +#####+ 230 * | | | | 231 * | | | | 232 * | | | | 233 * +-----+ +-----+ 234 */ 235 { ~SEG_G, ~SEG_G }, 236 237 /* +-----+ +-----+ 238 * | | | | 239 * | | | | 240 * | | | | 241 * +-----+ +-----+ 242 * | # # | 243 * | # # | 244 * | # # | 245 * +-----+ +-----+ 246 */ 247 { ~SEG_C, ~SEG_E }, 248 249 /* +-----+ +-----+ 250 * | | | | 251 * | | | | 252 * | | | | 253 * +-----+ +-----+ 254 * | | | | 255 * | | | | 256 * | | | | 257 * +#####+ +#####+ 258 */ 259 { ~SEG_D, ~SEG_D }, 260 261 /* +-----+ +-----+ 262 * | | | | 263 * | | | | 264 * | | | | 265 * +-----+ +-----+ 266 * # | | # 267 * # | | # 268 * # | | # 269 * +-----+ +-----+ 270 */ 271 { ~SEG_E, ~SEG_C }, 272 273 /* +-----+ +-----+ 274 * | | | | 275 * | | | | 276 * | | | | 277 * +#####+ +#####+ 278 * | | | | 279 * | | | | 280 * | | | | 281 * +-----+ +-----+ 282 */ 283 { ~SEG_G, ~SEG_G }, 284 285 /* +-----+ +-----+ 286 * | # # | 287 * | # # | 288 * | # # | 289 * +-----+ +-----+ 290 * | | | | 291 * | | | | 292 * | | | | 293 * +-----+ +-----+ 294 */ 295 { ~SEG_B, ~SEG_F }, 296 }; 297 298 void 299 iq80310_7seg_snake(void) 300 { 301 int cur = snakestate; 302 303 CPLD_WRITE(IQ80310_7SEG_MSB, snakemap[cur][0]); 304 CPLD_WRITE(IQ80310_7SEG_LSB, snakemap[cur][1]); 305 306 snakestate = (cur + 1) & 7; 307 } 308
Indexes created Thu Oct 02 01:09:59 GMT 2025