iq80321_7seg.c revision 1.1
1 /* $NetBSD: iq80321_7seg.c,v 1.1 2002/03/27 21:51:29 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 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 IQ80321. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <machine/bus.h> 46 47 #include <evbarm/iq80321/iq80321reg.h> 48 #include <evbarm/iq80321/iq80321var.h> 49 50 #define WRITE(x, v) *((__volatile uint8_t *) (x)) = (v) 51 52 #define ASCIIMAP_START '0' 53 #define ASCIIMAP_END '9' 54 55 static int snakestate; 56 57 static const uint8_t asciimap[] = { 58 /* +#####+ 59 * # # 60 * # # 61 * # # 62 * +-----+ 63 * # # 64 * # # 65 * # # 66 * +#####+ 67 */ 68 SEG_G, 69 70 /* +-----+ 71 * | # 72 * | # 73 * | # 74 * +-----+ 75 * | # 76 * | # 77 * | # 78 * +-----+ 79 */ 80 SEG_A|SEG_D|SEG_E|SEG_F|SEG_G, 81 82 /* +#####+ 83 * | # 84 * | # 85 * | # 86 * +#####+ 87 * # | 88 * # | 89 * # | 90 * +#####+ 91 */ 92 SEG_C|SEG_F, 93 94 /* +#####+ 95 * | # 96 * | # 97 * | # 98 * +#####+ 99 * | # 100 * | # 101 * | # 102 * +#####+ 103 */ 104 SEG_E|SEG_F, 105 106 /* +-----+ 107 * # # 108 * # # 109 * # # 110 * +#####+ 111 * | # 112 * | # 113 * | # 114 * +-----+ 115 */ 116 SEG_A|SEG_D|SEG_E, 117 118 /* +#####+ 119 * # | 120 * # | 121 * # | 122 * +#####+ 123 * | # 124 * | # 125 * | # 126 * +#####+ 127 */ 128 SEG_B|SEG_E, 129 130 /* +#####+ 131 * # | 132 * # | 133 * # | 134 * +#####+ 135 * # # 136 * # # 137 * # # 138 * +#####+ 139 */ 140 SEG_B, 141 142 /* +#####+ 143 * | # 144 * | # 145 * | # 146 * +-----+ 147 * | # 148 * | # 149 * | # 150 * +-----+ 151 */ 152 SEG_D|SEG_E|SEG_F, 153 154 /* +#####+ 155 * # # 156 * # # 157 * # # 158 * +#####+ 159 * # # 160 * # # 161 * # # 162 * +#####+ 163 */ 164 0, 165 166 /* +#####+ 167 * # # 168 * # # 169 * # # 170 * +#####+ 171 * | # 172 * | # 173 * | # 174 * +-----+ 175 */ 176 SEG_D|SEG_E, 177 }; 178 179 void 180 iq80321_7seg(char a, char b) 181 { 182 uint8_t msb, lsb; 183 184 if (a < ASCIIMAP_START || a > ASCIIMAP_END) 185 msb = 0xff; 186 else 187 msb = asciimap[a - ASCIIMAP_START] | SEG_DP; 188 189 if (b < ASCIIMAP_START || b > ASCIIMAP_END) 190 lsb = 0xff; 191 else 192 lsb = asciimap[b - ASCIIMAP_START] | SEG_DP; 193 194 snakestate = 0; 195 196 WRITE(IQ80321_7SEG_MSB, msb); 197 WRITE(IQ80321_7SEG_LSB, lsb); 198 } 199 200 static const uint8_t snakemap[][2] = { 201 202 /* +#####+ +#####+ 203 * | | | | 204 * | | | | 205 * | | | | 206 * +-----+ +-----+ 207 * | | | | 208 * | | | | 209 * | | | | 210 * +-----+ +-----+ 211 */ 212 { ~SEG_A & 0xff, ~SEG_A & 0xff }, 213 214 /* +-----+ +-----+ 215 * # | | # 216 * # | | # 217 * # | | # 218 * +-----+ +-----+ 219 * | | | | 220 * | | | | 221 * | | | | 222 * +-----+ +-----+ 223 */ 224 { ~SEG_F, ~SEG_B }, 225 226 /* +-----+ +-----+ 227 * | | | | 228 * | | | | 229 * | | | | 230 * +#####+ +#####+ 231 * | | | | 232 * | | | | 233 * | | | | 234 * +-----+ +-----+ 235 */ 236 { ~SEG_G, ~SEG_G }, 237 238 /* +-----+ +-----+ 239 * | | | | 240 * | | | | 241 * | | | | 242 * +-----+ +-----+ 243 * | # # | 244 * | # # | 245 * | # # | 246 * +-----+ +-----+ 247 */ 248 { ~SEG_C, ~SEG_E }, 249 250 /* +-----+ +-----+ 251 * | | | | 252 * | | | | 253 * | | | | 254 * +-----+ +-----+ 255 * | | | | 256 * | | | | 257 * | | | | 258 * +#####+ +#####+ 259 */ 260 { ~SEG_D, ~SEG_D }, 261 262 /* +-----+ +-----+ 263 * | | | | 264 * | | | | 265 * | | | | 266 * +-----+ +-----+ 267 * # | | # 268 * # | | # 269 * # | | # 270 * +-----+ +-----+ 271 */ 272 { ~SEG_E, ~SEG_C }, 273 274 /* +-----+ +-----+ 275 * | | | | 276 * | | | | 277 * | | | | 278 * +#####+ +#####+ 279 * | | | | 280 * | | | | 281 * | | | | 282 * +-----+ +-----+ 283 */ 284 { ~SEG_G, ~SEG_G }, 285 286 /* +-----+ +-----+ 287 * | # # | 288 * | # # | 289 * | # # | 290 * +-----+ +-----+ 291 * | | | | 292 * | | | | 293 * | | | | 294 * +-----+ +-----+ 295 */ 296 { ~SEG_B, ~SEG_F }, 297 }; 298 299 void 300 iq80321_7seg_snake(void) 301 { 302 int cur = snakestate; 303 304 WRITE(IQ80321_7SEG_MSB, snakemap[cur][0]); 305 WRITE(IQ80321_7SEG_LSB, snakemap[cur][1]); 306 307 snakestate = (cur + 1) & 7; 308 } 309
Indexes created Thu Oct 02 01:09:59 GMT 2025