iq80310_7seg.c revision 1.3
1 /* $NetBSD: iq80310_7seg.c,v 1.3 2001/12/01 02:04:27 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/obiovar.h> 49 50 #define ASCIIMAP_START '0' 51 #define ASCIIMAP_END '9' 52 53 static int snakestate; 54 55 static const uint8_t asciimap[] = { 56 /* +#####+ 57 * # # 58 * # # 59 * # # 60 * +-----+ 61 * # # 62 * # # 63 * # # 64 * +#####+ 65 */ 66 SEG_G, 67 68 /* +-----+ 69 * | # 70 * | # 71 * | # 72 * +-----+ 73 * | # 74 * | # 75 * | # 76 * +-----+ 77 */ 78 SEG_A|SEG_D|SEG_E|SEG_F|SEG_G, 79 80 /* +#####+ 81 * | # 82 * | # 83 * | # 84 * +#####+ 85 * # | 86 * # | 87 * # | 88 * +#####+ 89 */ 90 SEG_C|SEG_F, 91 92 /* +#####+ 93 * | # 94 * | # 95 * | # 96 * +#####+ 97 * | # 98 * | # 99 * | # 100 * +#####+ 101 */ 102 SEG_E|SEG_F, 103 104 /* +-----+ 105 * # # 106 * # # 107 * # # 108 * +#####+ 109 * | # 110 * | # 111 * | # 112 * +-----+ 113 */ 114 SEG_A|SEG_D|SEG_E, 115 116 /* +#####+ 117 * # | 118 * # | 119 * # | 120 * +#####+ 121 * | # 122 * | # 123 * | # 124 * +#####+ 125 */ 126 SEG_B|SEG_E, 127 128 /* +#####+ 129 * # | 130 * # | 131 * # | 132 * +#####+ 133 * # # 134 * # # 135 * # # 136 * +#####+ 137 */ 138 SEG_B, 139 140 /* +#####+ 141 * | # 142 * | # 143 * | # 144 * +-----+ 145 * | # 146 * | # 147 * | # 148 * +-----+ 149 */ 150 SEG_D|SEG_E|SEG_F, 151 152 /* +#####+ 153 * # # 154 * # # 155 * # # 156 * +#####+ 157 * # # 158 * # # 159 * # # 160 * +#####+ 161 */ 162 0, 163 164 /* +#####+ 165 * # # 166 * # # 167 * # # 168 * +#####+ 169 * | # 170 * | # 171 * | # 172 * +-----+ 173 */ 174 SEG_D|SEG_E, 175 }; 176 177 void 178 iq80310_7seg(char a, char b) 179 { 180 uint8_t msb, lsb; 181 182 if (a < ASCIIMAP_START || a > ASCIIMAP_END) 183 msb = 0xff; 184 else 185 msb = asciimap[a - ASCIIMAP_START] | SEG_DP; 186 187 if (b < ASCIIMAP_START || b > ASCIIMAP_END) 188 lsb = 0xff; 189 else 190 lsb = asciimap[b - ASCIIMAP_START] | SEG_DP; 191 192 snakestate = 0; 193 194 CPLD_WRITE(IQ80310_7SEG_MSB, msb); 195 CPLD_WRITE(IQ80310_7SEG_LSB, lsb); 196 } 197 198 static const uint8_t snakemap[][2] = { 199 200 /* +#####+ +#####+ 201 * | | | | 202 * | | | | 203 * | | | | 204 * +-----+ +-----+ 205 * | | | | 206 * | | | | 207 * | | | | 208 * +-----+ +-----+ 209 */ 210 { ~SEG_A, ~SEG_A }, 211 212 /* +-----+ +-----+ 213 * # | | # 214 * # | | # 215 * # | | # 216 * +-----+ +-----+ 217 * | | | | 218 * | | | | 219 * | | | | 220 * +-----+ +-----+ 221 */ 222 { ~SEG_F, ~SEG_B }, 223 224 /* +-----+ +-----+ 225 * | | | | 226 * | | | | 227 * | | | | 228 * +-----+ +-----+ 229 * # | | # 230 * # | | # 231 * # | | # 232 * +-----+ +-----+ 233 */ 234 { ~SEG_E, ~SEG_C }, 235 236 /* +-----+ +-----+ 237 * | | | | 238 * | | | | 239 * | | | | 240 * +-----+ +-----+ 241 * | | | | 242 * | | | | 243 * | | | | 244 * +#####+ +#####+ 245 */ 246 { ~SEG_D, ~SEG_D }, 247 248 /* +-----+ +-----+ 249 * | | | | 250 * | | | | 251 * | | | | 252 * +-----+ +-----+ 253 * | # # | 254 * | # # | 255 * | # # | 256 * +-----+ +-----+ 257 */ 258 { ~SEG_C, ~SEG_E }, 259 260 /* +-----+ +-----+ 261 * | # # | 262 * | # # | 263 * | # # | 264 * +-----+ +-----+ 265 * | | | | 266 * | | | | 267 * | | | | 268 * +-----+ +-----+ 269 */ 270 { ~SEG_B, ~SEG_F }, 271 }; 272 273 void 274 iq80310_7seg_snake(void) 275 { 276 int cur = snakestate; 277 278 CPLD_WRITE(IQ80310_7SEG_MSB, snakemap[cur][0]); 279 CPLD_WRITE(IQ80310_7SEG_LSB, snakemap[cur][1]); 280 281 snakestate = (snakestate == 5) ? 0 : cur + 1; 282 } 283
Indexes created Wed Oct 01 19:09:53 GMT 2025