Mercurial > ~darius > hgwebdir.cgi > avr
annotate testavr.c @ 10:eb1faf51968e
- Add some useful return values to search functions.
- Remove some unecessary trailing \'s in macros
- Replace some inline assembly I missed last time with C/macros.
| author | darius |
|---|---|
| date | Mon, 12 Jul 2004 23:59:00 +0930 |
| parents | 7ed10c59ba06 |
| children | ccc39c9f320b |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
9
7ed10c59ba06
Supply clock speed via the command line so 1wire-delay.h can use it.
darius
parents:
7
diff
changeset
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2 * Test various AVR bits and pieces |
|
7ed10c59ba06
Supply clock speed via the command line so 1wire-delay.h can use it.
darius
parents:
7
diff
changeset
|
3 * |
|
7ed10c59ba06
Supply clock speed via the command line so 1wire-delay.h can use it.
darius
parents:
7
diff
changeset
|
4 * $Id$ |
|
7ed10c59ba06
Supply clock speed via the command line so 1wire-delay.h can use it.
darius
parents:
7
diff
changeset
|
5 * |
| 0 | 6 * Copyright (c) 2004 |
| 7 * Daniel O'Connor <darius@dons.net.au>. All rights reserved. | |
| 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 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
| 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 21 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 28 * SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include <stdio.h> | |
| 32 #include <avr/io.h> | |
| 33 #include <avr/interrupt.h> | |
| 34 #include <avr/signal.h> | |
| 35 #include <avr/pgmspace.h> | |
| 36 #include <string.h> | |
| 4 | 37 #include <ctype.h> |
| 0 | 38 |
| 39 #include "1wire.h" | |
| 40 | |
| 41 #define UART_BAUD_SELECT(baudRate,xtalCpu) ((xtalCpu)/((baudRate)*16l)-1) | |
| 4 | 42 #define UART_BAUD_RATE 19200 |
| 0 | 43 |
| 44 void uart_putsP(const char *addr); | |
| 45 void uart_puts(const char *addr); | |
| 46 int uart_putc(char c); | |
| 4 | 47 int uart_getc(void); |
| 48 int beginswith_P(const char *s1, const char *s2); | |
| 0 | 49 |
| 4 | 50 #if 0 |
| 0 | 51 uint8_t PROGMEM ledvals[] = {0x01, 0x03, 0x07, 0x0e, 0x1c, 0x38, 0x70, 0xe0, 0xc0, 0x80}; |
| 4 | 52 static uint8_t dir = 0; |
| 53 static volatile uint8_t leds = 0; | |
| 54 static uint8_t ledpos = 0; | |
| 0 | 55 |
| 56 INTERRUPT(SIG_OVERFLOW0) { | |
| 57 if (!leds) | |
| 58 return; | |
| 59 | |
| 60 /* Going up */ | |
| 61 if (dir == 0) { | |
| 62 if (ledpos == 9) { | |
| 63 dir = 1; | |
| 64 TCNT0 = 0; | |
| 65 goto doleds; | |
| 66 } | |
| 67 | |
| 68 ledpos++; | |
| 69 } else { | |
| 70 if (ledpos == 0) { | |
| 71 dir = 0; | |
| 72 TCNT0 = 0; | |
| 73 goto doleds; | |
| 74 } | |
| 75 | |
| 76 ledpos--; | |
| 77 } | |
| 78 | |
| 79 doleds: | |
| 80 TCNT0 = 0; | |
| 81 | |
| 82 PORTA = pgm_read_byte(&ledvals[ledpos]); | |
| 83 } | |
| 4 | 84 #endif |
| 0 | 85 |
| 86 void | |
| 87 usleep(uint16_t usec) { | |
| 88 /* 4Mhz = 250ns per clock cycle */ | |
| 89 usec /= 2; | |
| 90 if (usec < 1) | |
| 91 return; | |
| 92 | |
| 93 while (usec--) | |
| 94 asm volatile ( | |
| 95 "" | |
| 96 ::); | |
| 97 } | |
| 98 | |
| 99 int | |
| 100 main(void) { | |
| 4 | 101 uint8_t ROM[8]; |
| 102 char cmdbuf[40]; | |
| 0 | 103 int i; |
| 104 | |
| 105 cli(); | |
| 4 | 106 #if 0 |
| 0 | 107 outp(0xff, DDRA); |
| 4 | 108 |
| 109 /* Timer Clock divisor - CK/1024 */ | |
| 110 outp(BV(CS00) | BV(CS02), TCCR0); | |
| 111 #endif | |
| 0 | 112 outp(0xfe, DDRC); |
| 113 outp(0x00, PORTC); | |
| 114 | |
| 115 /* Init UART */ | |
| 116 outp(UART_BAUD_SELECT(UART_BAUD_RATE,XTAL_CPU), UBRR); | |
| 117 | |
| 118 /* Enable receiver and transmitter. Turn on transmit interrupts */ | |
| 119 outp(BV(RXEN) | BV(TXEN), UCR); | |
| 120 | |
| 4 | 121 uart_putsP(PSTR("\n\r\n\r===============\n\r" |
| 122 "Inited!\n\r\n\r")); | |
| 123 | |
| 124 while (1) { | |
| 125 uart_putsP(PSTR("> ")); | |
| 126 i = 0; | |
| 127 while (1) { | |
| 128 cmdbuf[i] = tolower(uart_getc()); | |
| 129 if (cmdbuf[i] == '\n' || cmdbuf[i] == '\r') | |
| 130 break; | |
| 131 | |
| 132 /* Backspace */ | |
| 133 if (cmdbuf[i] == 010) { | |
| 134 if (i > 0) { | |
| 135 uart_putsP(PSTR("\010\040\010")); | |
| 136 i--; | |
| 137 } | |
| 138 continue; | |
| 139 } | |
| 0 | 140 |
| 4 | 141 /* Anything unprintable just ignore it */ |
| 142 if (!isprint(cmdbuf[i])) | |
| 143 continue; | |
| 144 | |
| 145 uart_putc(cmdbuf[i]); | |
| 146 i++; | |
| 147 if (i == sizeof(cmdbuf)) { | |
| 148 uart_putsP(PSTR("\n\rLine too long\n\r")); | |
| 149 i = 0; | |
| 150 continue; | |
| 151 } | |
| 152 } | |
| 153 cmdbuf[i + 1] = '\0'; | |
| 154 uart_putsP(PSTR("\n\r")); | |
| 155 if (i == 0) | |
| 156 continue; | |
| 0 | 157 |
| 4 | 158 if (cmdbuf[0] == '?') { |
| 159 uart_putsP(PSTR("rs Reset and check for presence\n\r" | |
| 7 | 160 "sr Search the bus for ROMs\n\r" |
| 4 | 161 "re Read a bit\n\r" |
| 162 "rb Read a byte\n\r" | |
| 163 "wr bit Write a bit\n\r" | |
| 164 "wb byte Write a byte (hex)\n\r" | |
| 165 "wc cmd [ROMID] Write command\n\r" | |
| 166 "te ROMID Read the temperature from a DS1820\n\r")); | |
| 167 continue; | |
| 168 } | |
| 0 | 169 |
| 4 | 170 if (i < 2) |
| 171 goto badcmd; | |
| 172 | |
| 173 if (cmdbuf[0] == 'r' && cmdbuf[1] == 's') { | |
| 174 uart_putsP(PSTR("Resetting... ")); | |
| 175 | |
| 176 if (OWTouchReset() == 1) | |
| 10 | 177 uart_putsP(PSTR("No presense pulse found\n\r")); |
| 4 | 178 else |
| 10 | 179 uart_putsP(PSTR("Presense pulse found\n\r")); |
| 4 | 180 } else if (cmdbuf[0] == 'r' && cmdbuf[1] == 'e') { |
| 0 | 181 if (OWReadBit()) |
| 182 uart_putsP(PSTR("Read a 1\n\r")); | |
| 183 else | |
| 184 uart_putsP(PSTR("Read a 0\n\r")); | |
| 4 | 185 } else if (cmdbuf[0] == 'r' && cmdbuf[1] == 'b') { |
| 186 sprintf_P(cmdbuf, PSTR("Read a 0x%02x\n\r"), OWReadByte()); | |
| 187 uart_puts(cmdbuf); | |
| 188 } else if (cmdbuf[0] == 'w' && cmdbuf[1] == 'r') { | |
| 189 int arg; | |
| 190 | |
| 191 if (sscanf_P(cmdbuf + 3, PSTR("%d"), &arg) != 1) { | |
| 192 uart_putsP(PSTR("Unable to parse wr command\n\r")); | |
| 193 continue; | |
| 194 } | |
| 195 | |
| 196 OWWriteBit(arg); | |
| 197 sprintf_P(cmdbuf, PSTR("Wrote a %d\n\r"), arg); | |
| 198 uart_puts(cmdbuf); | |
| 199 } else if (cmdbuf[0] == 'w' && cmdbuf[1] == 'b') { | |
| 200 int arg; | |
| 201 | |
| 202 if (sscanf_P(cmdbuf + 3, PSTR("%2x"), &arg) != 1) { | |
| 203 uart_putsP(PSTR("Unable to parse wb command\n\r")); | |
| 204 continue; | |
| 205 } | |
| 206 | |
| 207 OWWriteByte(arg); | |
| 208 sprintf_P(cmdbuf, PSTR("Wrote a 0x%02x\n\r"), arg); | |
| 209 uart_puts(cmdbuf); | |
| 210 } else if (cmdbuf[0] == 'w' && cmdbuf[1] == 'c') { | |
| 211 int arg; | |
| 0 | 212 |
| 4 | 213 switch (sscanf_P(cmdbuf + 3, PSTR("%x %x:%x:%x:%x:%x:%x:%x:%x:%x"), &arg, |
| 214 &ROM[0], &ROM[1], &ROM[2], &ROM[3], | |
| 215 &ROM[4], &ROM[5], &ROM[6], &ROM[7])) { | |
| 216 break; | |
| 217 | |
| 218 case 1: | |
| 219 OWSendCmd(NULL, arg); | |
| 220 sprintf_P(cmdbuf, PSTR("Sent 0x%02x to all ROMS\n\r"), arg); | |
| 221 uart_puts(cmdbuf); | |
| 222 break; | |
| 223 | |
| 224 case 9: | |
| 225 OWSendCmd(ROM, arg); | |
| 226 sprintf_P(cmdbuf, PSTR("Sent 0x%02x to ROM %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n\r"), | |
| 227 arg, ROM[0], ROM[1], ROM[2], ROM[3], | |
| 228 ROM[4], ROM[5], ROM[6], ROM[7]); | |
| 229 uart_puts(cmdbuf); | |
| 230 | |
| 231 break; | |
| 232 | |
| 233 case 0: | |
| 234 default: | |
| 235 uart_putsP(PSTR("Unable to parse wc command\n\r")); | |
| 236 break; | |
| 237 } | |
| 238 | |
| 239 OWWriteByte(arg); | |
| 240 sprintf_P(cmdbuf, PSTR("Wrote a 0x%02x\n\r"), arg); | |
| 241 uart_puts(cmdbuf); | |
| 242 } else if (cmdbuf[0] == 't' && cmdbuf[1] == 'e') { | |
| 243 uint8_t crc; | |
| 244 uint16_t temp; | |
| 245 uint8_t buf[9]; | |
| 246 | |
| 247 if (sscanf_P(cmdbuf + 3, PSTR("%x:%x:%x:%x:%x:%x:%x:%x:%x"), | |
| 248 &ROM[0], &ROM[1], &ROM[2], &ROM[3], | |
| 249 &ROM[4], &ROM[5], &ROM[6], &ROM[7]) != 8) { | |
| 250 uart_putsP(PSTR("Unable to parse ROM ID\n\r")); | |
| 251 continue; | |
| 252 } | |
| 253 | |
| 254 if (ROM[0] != OW_FAMILY_TEMP) { | |
| 255 uart_putsP(PSTR("ROM specified isn't a temperature sensor\n\r")); | |
| 256 continue; | |
| 257 } | |
| 258 | |
| 259 OWSendCmd(ROM, OW_CONVERTT_CMD); | |
| 260 #if OW_DEBUG | |
| 261 uart_putsP(PSTR("Command sent, waiting\n\r")); | |
| 262 #endif | |
| 263 i = 0; | |
| 264 while (OWReadBit() == 0) { | |
| 265 i++; | |
| 266 } | |
| 267 #if OW_DEBUG | |
| 268 sprintf_P(cmdbuf, PSTR("Temp comversion took %d cycles\n\r"), i); | |
| 269 uart_puts(cmdbuf); | |
| 270 #endif | |
| 271 OWSendCmd(ROM, OW_RD_SCR_CMD); | |
| 272 crc = 0; | |
| 273 for (i = 0; i < 9; i++) { | |
| 274 buf[i] = OWReadByte(); | |
| 275 if (i < 8) | |
| 276 OWCRC(buf[i], &crc); | |
| 277 } | |
| 278 | |
| 279 temp = buf[0]; | |
| 280 temp |= (uint16_t)buf[1] << 8; | |
| 281 temp <<= 3; | |
| 282 | |
| 283 if (crc != buf[8]) { | |
| 284 sprintf_P(cmdbuf, PSTR("CRC mismatch got %d vs calcd %d\n\r"), buf[8], crc); | |
| 285 uart_puts(cmdbuf); | |
| 286 continue; | |
| 287 } | |
| 288 | |
| 289 sprintf_P(cmdbuf, PSTR("temperature %d.%01d\n\r"), | |
| 290 temp >> 4, (temp << 12) / 6553); | |
| 291 uart_puts(cmdbuf); | |
| 292 } else if (cmdbuf[0] == 's' && cmdbuf[1] == 'r') { | |
| 293 memset(ROM, 0, 8); | |
| 10 | 294 |
| 295 i = OWFirst(ROM, 1, 0); | |
| 0 | 296 do { |
| 10 | 297 switch (i) { |
| 298 case OW_BADWIRE: | |
| 299 uart_putsP(PSTR("Presense pulse, but no module found, bad module/cabling?\n\r")); | |
| 300 break; | |
| 301 | |
| 302 case OW_NOPRESENCE: | |
| 303 uart_putsP(PSTR("No presense pulse found\n\r")); | |
| 304 break; | |
| 305 | |
| 306 case OW_BADCRC: | |
| 307 uart_putsP(PSTR("Bad CRC\n\r")); | |
| 308 break; | |
| 309 | |
| 310 case OW_NOMODULES: | |
| 311 case OW_FOUND: | |
| 312 break; | |
| 313 | |
| 314 default: | |
| 315 uart_putsP(PSTR("Unknown error from 1 wire library\n\r")); | |
| 316 break; | |
| 317 } | |
| 318 | |
| 319 if (i != OW_FOUND) | |
| 320 break; | |
| 321 | |
| 4 | 322 sprintf_P(cmdbuf, PSTR("%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n\r"), |
| 0 | 323 ROM[0], |
| 324 ROM[1], | |
| 325 ROM[2], | |
| 326 ROM[3], | |
| 327 ROM[4], | |
| 328 ROM[5], | |
| 329 ROM[6], | |
| 330 ROM[7]); | |
| 4 | 331 uart_puts(cmdbuf); |
| 10 | 332 |
| 333 i = OWNext(ROM, 1, 0); | |
| 334 } while (1); | |
| 335 | |
| 4 | 336 #if 0 |
| 0 | 337 |
| 4 | 338 } else if (cmdbuf[0] == 'l' && cmdbuf[1] == 'e' && cmdbuf[2] == 'd') { |
| 0 | 339 if (leds == 0) { |
| 340 leds = 1; | |
| 341 ledpos = 0; | |
| 342 outp(0, TCNT0); | |
| 343 sbi(TIMSK, TOIE0); | |
| 344 sei(); | |
| 345 uart_putsP(PSTR("Starting\n\r")); | |
| 346 } else { | |
| 347 leds = 0; | |
| 348 ledpos = 0; | |
| 349 PORTA = 0x00; | |
| 350 cbi(TIMSK, TOIE0); | |
| 351 cli(); | |
| 352 uart_putsP(PSTR("Stopping\n\r")); | |
| 353 } | |
| 4 | 354 #endif |
| 355 } else { | |
| 356 badcmd: | |
| 357 uart_putsP(PSTR("Unknown command, ? for a list\n\r")); | |
| 0 | 358 } |
| 359 | |
| 360 } | |
| 361 | |
| 362 return(0); | |
| 363 } | |
| 364 | |
| 365 int | |
| 366 uart_putc(char c) { | |
| 367 loop_until_bit_is_set(USR, UDRE); | |
| 368 outp(c, UDR); | |
| 369 | |
| 370 return(0); | |
| 371 } | |
| 372 | |
| 373 void | |
| 374 uart_putsP(const char *addr) { | |
| 375 char c; | |
| 376 | |
| 377 while ((c = PRG_RDB((unsigned short)addr++))) | |
| 378 uart_putc(c); | |
| 379 } | |
| 380 | |
| 381 void | |
| 382 uart_puts(const char *addr) { | |
| 383 while (*addr) | |
| 384 uart_putc(*addr++); | |
| 385 } | |
| 386 | |
| 4 | 387 int |
| 0 | 388 uart_getc(void) { |
| 389 while (!(inp(USR) & 0x80)) | |
| 390 ; | |
| 391 | |
| 392 return (inp(UDR)); | |
| 393 } | |
| 4 | 394 |