Mercurial > ~darius > hgwebdir.cgi > avr
annotate testavr.c @ 32:b0cb873c0206
Isolate the bus frobbing parts and the delays into a separate header.
This means the user only has to edit a single file to suit their
situation and allows the code to work with active drive systems as
well as passive pullups (ie 1 vs 2 IO pins)
| author | darius |
|---|---|
| date | Sun, 23 Apr 2006 22:57:16 +0930 |
| parents | 48056516b3eb |
| children | 25fa387ef7e9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
9
7ed10c59ba06
Supply clock speed via the command line so 1wire-delay.h can use it.
darius
parents:
7
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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 <avr/io.h> | |
| 32 #include <avr/interrupt.h> | |
| 33 #include <avr/pgmspace.h> | |
| 34 #include <string.h> | |
| 4 | 35 #include <ctype.h> |
| 13 | 36 #include <stdlib.h> |
| 24 | 37 #include <util/delay.h> |
| 0 | 38 |
| 39 #include "1wire.h" | |
| 24 | 40 #include "usb.h" |
| 0 | 41 |
| 42 #define UART_BAUD_SELECT(baudRate,xtalCpu) ((xtalCpu)/((baudRate)*16l)-1) | |
| 24 | 43 #define UART_BAUD_RATE 38400 |
| 44 | |
| 45 void process_cmd(void); | |
| 0 | 46 |
| 47 void uart_putsP(const char *addr); | |
| 48 void uart_puts(const char *addr); | |
| 49 int uart_putc(char c); | |
| 13 | 50 void uart_puts_dec(uint8_t a, uint8_t l); |
| 51 void uart_puts_hex(uint8_t a); | |
| 24 | 52 char uart_getc(void); |
| 11 | 53 |
| 24 | 54 /* Receive buffer storage */ |
| 55 volatile struct { | |
| 56 char buf[40]; | |
| 57 uint8_t state; | |
| 58 uint8_t len; | |
| 59 } cmd = { | |
| 60 .state = 255, | |
| 61 .len = 0 | |
| 62 }; | |
| 4 | 63 |
| 24 | 64 /* Rx complete */ |
| 65 ISR(USART_RXC_vect) { | |
| 66 volatile char pit; | |
| 67 char c; | |
| 68 | |
| 69 while (UCSRA & _BV(RXC)) { | |
| 70 /* 255 means we're waiting for main to process the command, | |
| 71 just throw stuff away | |
| 72 */ | |
| 73 if (cmd.state == 255) { | |
| 74 pit = UDR; | |
| 75 continue; | |
| 76 } | |
| 77 c = UDR; | |
| 78 | |
| 79 /* End of line? */ | |
| 80 if (c == '\n' || c == '\r') { | |
| 81 cmd.buf[cmd.state + 1] = '\0'; | |
| 82 uart_putsP(PSTR("\n\r")); | |
| 83 cmd.len = cmd.state; | |
| 84 cmd.state = 255; | |
| 85 continue; | |
| 86 } | |
| 87 | |
| 88 /* Backspace/delete */ | |
| 89 if (c == 0x08 || c == 0x7f) { | |
| 90 if (cmd.state > 0) { | |
| 91 cmd.state--; | |
| 92 uart_putsP(PSTR("\010\040\010")); | |
| 4 | 93 } |
| 94 continue; | |
| 95 } | |
| 0 | 96 |
| 24 | 97 /* Anything unprintable just ignore it */ |
| 98 if (!isprint(c)) | |
| 99 continue; | |
| 100 | |
| 101 cmd.buf[cmd.state] = tolower(c); | |
| 102 | |
| 103 /* Echo back to the user */ | |
| 104 uart_putc(cmd.buf[cmd.state]); | |
| 105 | |
| 106 cmd.state++; | |
| 107 /* Over flow? */ | |
| 108 if (cmd.state == ((sizeof(cmd.buf) / sizeof(cmd.buf[0])) - 1)) { | |
| 109 uart_putsP(PSTR("\n\rLine too long")); | |
| 110 cmd.state = 0; | |
| 111 continue; | |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 /* Tx complete */ | |
| 117 ISR(USART_TXC_vect) { | |
| 4 | 118 |
| 24 | 119 } |
| 120 | |
| 121 int | |
| 122 main(void) { | |
| 123 /* Disable interrupts while we frob stuff */ | |
| 124 cli(); | |
| 125 | |
| 126 /* Disable JTAG (yes twice) */ | |
| 127 MCUCSR |= _BV(JTD); | |
| 128 MCUCSR |= _BV(JTD); | |
| 129 | |
| 130 /* USB data bus (7:0) */ | |
| 131 DDRA = 0x00; | |
| 132 PORTA = 0x00; | |
| 133 | |
| 134 /* USB control (3:0) */ | |
| 135 DDRB = 0x0e; | |
| 136 PORTB = 0x00; | |
| 137 | |
| 138 /* GPIO (0:7) */ | |
| 139 DDRC = 0xff; | |
| 140 PORTC = 0x00; | |
| 141 | |
| 142 /* GPIO (2:7) */ | |
| 143 DDRD = 0xfc; | |
| 30 | 144 PORTD = 0xfc; |
| 24 | 145 |
| 146 /* Init UART */ | |
| 147 UBRRH = UART_BAUD_SELECT(UART_BAUD_RATE, F_CPU) >> 8; | |
| 148 UBRRL = (uint8_t)UART_BAUD_SELECT(UART_BAUD_RATE, F_CPU); | |
| 149 | |
| 150 /* Enable receiver and transmitter. Turn on transmit interrupts */ | |
| 151 UCSRA = 0; | |
| 152 UCSRB = _BV(RXEN) | _BV(TXEN) | _BV(RXCIE); | |
| 153 UCSRC = _BV(URSEL) | _BV(UCSZ1) | _BV(UCSZ0); | |
| 154 uart_putsP(PSTR("\n\r\n\r===============\n\r" | |
| 155 "Inited!\n\r\n\r")); | |
| 156 | |
| 157 /* Ready to go! */ | |
| 158 sei(); | |
| 159 | |
| 160 usb_init(); | |
| 161 _delay_us(1000); | |
| 162 | |
| 163 uart_putsP(PSTR("> ")); | |
| 164 cmd.state = 0; | |
| 165 | |
| 166 /* Wait for user input or an "interrupt" */ | |
| 167 while (1) { | |
| 168 if (cmd.state == 255) { | |
| 169 process_cmd(); | |
| 170 uart_putsP(PSTR("> ")); | |
| 171 /* Allow new characters to be processed */ | |
| 172 cmd.state = 0; | |
| 173 } | |
| 174 | |
| 175 if (!(PINB & _BV(PB0))) | |
| 176 usb_intr(); | |
| 177 } | |
| 178 } | |
| 179 | |
| 180 void | |
| 181 process_cmd(void) { | |
| 182 uint8_t ROM[8]; | |
| 183 int8_t i, arg; | |
| 184 uint8_t crc, buf[9]; | |
| 185 int8_t temp; | |
| 186 uint16_t tfrac; | |
| 0 | 187 |
| 24 | 188 /* User just pressed enter */ |
| 189 if (cmd.len == 0) | |
| 190 return; | |
| 191 | |
| 192 if (cmd.buf[0] == '?') { | |
| 193 uart_putsP(PSTR("rs Reset and check for presence\n\r" | |
| 194 "sr Search the bus for ROMs\n\r" | |
| 195 "re Read a bit\n\r" | |
| 196 "rb Read a byte\n\r" | |
| 197 "wr bit Write a bit\n\r" | |
| 198 "wb byte Write a byte (hex)\n\r" | |
| 199 "wc cmd [ROMID] Write command\n\r" | |
| 200 "te ROMID Read the temperature from a DS1820\n\r" | |
| 201 "in port Read from a port\n\r" | |
| 202 "out port val Write to a port\n\r" | |
| 203 "ddr port [val] Read/write DDR for a port\n\r")); | |
| 204 | |
| 205 return; | |
| 206 } | |
| 207 | |
| 208 i = strlen((char *)cmd.buf); | |
| 209 if (cmd.len < 2) | |
| 210 goto badcmd; | |
| 211 | |
| 212 if (cmd.buf[0] == 'r' && cmd.buf[1] == 's') { | |
| 213 uart_putsP(PSTR("Resetting... ")); | |
| 4 | 214 |
| 24 | 215 if (OWTouchReset() == 1) |
| 216 uart_putsP(PSTR("No presence pulse found\n\r")); | |
| 217 else | |
| 218 uart_putsP(PSTR("Presence pulse found\n\r")); | |
| 219 } else if (cmd.buf[0] == 'r' && cmd.buf[1] == 'e') { | |
| 220 if (OWReadBit()) | |
| 221 uart_putsP(PSTR("Read a 1\n\r")); | |
| 222 else | |
| 223 uart_putsP(PSTR("Read a 0\n\r")); | |
| 224 } else if (cmd.buf[0] == 'r' && cmd.buf[1] == 'b') { | |
| 225 uart_putsP(PSTR("Read a 0x")); | |
| 226 uart_puts_hex(OWReadByte()); | |
| 227 uart_putsP(PSTR("\n\r")); | |
| 228 } else if (cmd.buf[0] == 'w' && cmd.buf[1] == 'r') { | |
| 229 arg = strtol((char *)cmd.buf + 3, (char **)NULL, 10); | |
| 230 OWWriteBit(arg); | |
| 231 uart_putsP(PSTR("Wrote a ")); | |
| 232 if (arg) | |
| 233 uart_putsP(PSTR("1\n\r")); | |
| 234 else | |
| 235 uart_putsP(PSTR("0\n\r")); | |
| 236 } else if (cmd.buf[0] == 'w' && cmd.buf[1] == 'b') { | |
| 237 arg = (int)strtol((char *)cmd.buf + 3, (char **)NULL, 16); | |
| 238 OWWriteByte(arg); | |
| 239 } else if (cmd.buf[0] == 'w' && cmd.buf[1] == 'c') { | |
| 240 if (cmd.len < 5) { | |
| 241 uart_putsP(PSTR("No arguments\n\r")); | |
| 242 return; | |
| 243 } | |
| 244 | |
| 245 arg = (int)strtol((char *)cmd.buf + 3, (char **)NULL, 16); | |
| 246 if (arg == 0) { | |
| 247 uart_putsP(PSTR("Unparseable command\n\r")); | |
| 248 return; | |
| 249 } | |
| 13 | 250 |
| 24 | 251 if (i == 5) { |
| 252 OWSendCmd(NULL, arg); | |
| 253 return; | |
| 254 } | |
| 4 | 255 |
| 24 | 256 if (i < 29) { |
| 257 uart_putsP(PSTR("Can't parse ROM ID\n\r")); | |
| 258 return; | |
| 259 } | |
| 260 for (i = 0; i < 8; i++) | |
| 261 ROM[i] = (int)strtol((char *)cmd.buf + 6 + (3 * i), (char **)NULL, 16); | |
| 262 | |
| 263 OWSendCmd(ROM, arg); | |
| 264 } else if (cmd.buf[0] == 't' && cmd.buf[1] == 'e') { | |
| 265 if (cmd.len < 26) { | |
| 266 uart_putsP(PSTR("Unable to parse ROM ID\n\r")); | |
| 267 return; | |
| 268 } | |
| 269 | |
| 270 for (i = 0; i < 8; i++) | |
| 271 ROM[i] = (int)strtol((char *)cmd.buf + 3 * (i + 1), (char **)NULL, 16); | |
| 272 | |
| 273 if (ROM[0] != OW_FAMILY_TEMP) { | |
| 274 uart_putsP(PSTR("ROM specified isn't a temperature sensor\n\r")); | |
| 275 return; | |
| 276 } | |
| 4 | 277 |
| 24 | 278 OWSendCmd(ROM, OW_CONVERTT_CMD); |
| 279 i = 0; | |
| 280 while (OWReadBit() == 0) { | |
| 281 i++; | |
| 282 } | |
| 283 OWSendCmd(ROM, OW_RD_SCR_CMD); | |
| 284 crc = 0; | |
| 285 for (i = 0; i < 9; i++) { | |
| 286 buf[i] = OWReadByte(); | |
| 287 if (i < 8) | |
| 288 OWCRC(buf[i], &crc); | |
| 289 } | |
| 290 | |
| 291 if (crc != buf[8]) { | |
| 292 uart_putsP(PSTR("CRC mismatch\n\r")); | |
| 293 return; | |
| 294 } | |
| 4 | 295 |
| 13 | 296 #if 0 |
| 24 | 297 uart_putsP(PSTR("temperature ")); |
| 298 uart_puts_dec(temp >> 4, 0); | |
| 299 uart_putsP(PSTR(".")); | |
| 300 uart_puts_dec((temp << 12) / 6553, 0); | |
| 301 uart_putsP(PSTR("\n\r")); | |
| 13 | 302 #else |
| 24 | 303 /* 0 Temperature LSB |
| 304 * 1 Temperature MSB | |
| 305 * 2 Th | |
| 306 * 3 Tl | |
| 307 * 4 Reserved | |
| 308 * 5 Reserved | |
| 309 * 6 Count Remain | |
| 310 * 7 Count per C | |
| 311 * 8 CRC | |
| 312 */ | |
| 13 | 313 #if 0 |
| 24 | 314 for (i = 0; i < 9; i++) { |
| 315 uart_puts_dec(buf[i], 0); | |
| 316 uart_putsP(PSTR("\n\r")); | |
| 317 } | |
| 13 | 318 #endif |
| 24 | 319 temp = buf[0]; |
| 320 if (buf[1] & 0x80) | |
| 321 temp -= 256; | |
| 322 temp >>= 1; | |
| 13 | 323 |
| 24 | 324 tfrac = buf[7] - buf[6]; |
| 325 tfrac *= (uint16_t)100; | |
| 326 tfrac /= buf[7]; | |
| 327 tfrac += 75; | |
| 328 if (tfrac < 100) { | |
| 329 temp--; | |
| 330 } else { | |
| 331 tfrac -= 100; | |
| 332 } | |
| 13 | 333 |
| 24 | 334 if (temp < 0){ |
| 335 uart_putc('-'); | |
| 336 uart_puts_dec(-temp, 0); | |
| 337 } else | |
| 338 uart_puts_dec(temp, 0); | |
| 339 uart_putsP(PSTR(".")); | |
| 340 uart_puts_dec(tfrac, 1); | |
| 341 uart_putsP(PSTR("\n\r")); | |
| 13 | 342 |
| 343 #endif | |
| 24 | 344 } else if (cmd.buf[0] == 's' && cmd.buf[1] == 'r') { |
| 345 memset(ROM, 0, 8); | |
| 10 | 346 |
| 24 | 347 i = OWFirst(ROM, 1, 0); |
| 348 do { | |
| 349 switch (i) { | |
| 10 | 350 case OW_BADWIRE: |
| 16 | 351 uart_putsP(PSTR("Presence pulse, but no module found, bad module/cabling?\n\r")); |
| 10 | 352 break; |
| 353 | |
| 354 case OW_NOPRESENCE: | |
| 16 | 355 uart_putsP(PSTR("No presence pulse found\n\r")); |
| 10 | 356 break; |
| 357 | |
| 358 case OW_BADCRC: | |
| 359 uart_putsP(PSTR("Bad CRC\n\r")); | |
| 360 break; | |
| 361 | |
| 362 case OW_NOMODULES: | |
| 363 case OW_FOUND: | |
| 364 break; | |
| 365 | |
| 366 default: | |
| 367 uart_putsP(PSTR("Unknown error from 1 wire library\n\r")); | |
| 368 break; | |
| 24 | 369 } |
| 10 | 370 |
| 24 | 371 if (i != OW_FOUND) |
| 372 break; | |
| 13 | 373 |
| 24 | 374 for (i = 0; i < 7; i++) { |
| 375 uart_puts_hex(ROM[i]); | |
| 376 uart_putc(':'); | |
| 377 } | |
| 378 uart_puts_hex(ROM[7]); | |
| 379 uart_putsP(PSTR("\n\r")); | |
| 10 | 380 |
| 24 | 381 i = OWNext(ROM, 1, 0); |
| 382 } while (1); | |
| 383 } else if (cmd.buf[0] == 'i' && cmd.buf[1] == 'n') { | |
| 384 switch (tolower(cmd.buf[3])) { | |
| 385 case 'a': | |
| 386 crc = PINA; | |
| 387 break; | |
| 388 | |
| 389 case 'b': | |
| 390 crc = PINB; | |
| 391 break; | |
| 392 | |
| 393 case 'c': | |
| 394 crc = PINC; | |
| 395 break; | |
| 396 | |
| 397 case 'd': | |
| 398 crc = PIND; | |
| 399 break; | |
| 400 | |
| 401 default: | |
| 402 uart_putsP(PSTR("Unknown port\n\r")); | |
| 403 return; | |
| 0 | 404 } |
| 24 | 405 uart_putsP(PSTR("0x")); |
| 406 uart_puts_hex(crc); | |
| 407 uart_putsP(PSTR("\n\r")); | |
| 408 } else if (cmd.buf[0] == 'o' && cmd.buf[1] == 'u') { | |
| 409 crc = strtol((char *)cmd.buf + 8, (char **)NULL, 16); | |
| 410 switch (tolower(cmd.buf[4])) { | |
| 411 case 'a': | |
| 412 PORTA = crc; | |
| 413 break; | |
| 414 | |
| 415 case 'b': | |
| 416 PORTB = crc; | |
| 417 break; | |
| 418 | |
| 419 case 'c': | |
| 420 PORTC = crc; | |
| 421 break; | |
| 422 | |
| 423 case 'd': | |
| 424 PORTD = crc; | |
| 425 break; | |
| 426 | |
| 427 default: | |
| 428 uart_putsP(PSTR("Unknown port\n\r")); | |
| 429 return; | |
| 430 } | |
| 431 uart_putsP(PSTR("0x")); | |
| 432 uart_puts_hex(crc); | |
| 433 uart_putsP(PSTR("\n\r")); | |
| 434 } else if (cmd.buf[0] == 'u' && cmd.buf[1] == 's') { | |
| 435 usb_gendata(); | |
| 436 } else { | |
| 437 badcmd: | |
| 438 uart_putsP(PSTR("Unknown command, ? for a list\n\r")); | |
| 0 | 439 } |
| 24 | 440 } |
| 0 | 441 |
| 442 int | |
| 443 uart_putc(char c) { | |
| 24 | 444 loop_until_bit_is_set(UCSRA, UDRE); |
|
17
a58b41b7d15c
Covert to a later version of avr-libc. Stuff like not using inb/outb,
darius
parents:
16
diff
changeset
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445 UDR = c; |
| 0 | 446 |
| 447 return(0); | |
| 448 } | |
| 449 | |
| 450 void | |
| 451 uart_putsP(const char *addr) { | |
| 452 char c; | |
| 453 | |
|
17
a58b41b7d15c
Covert to a later version of avr-libc. Stuff like not using inb/outb,
darius
parents:
16
diff
changeset
|
454 while ((c = pgm_read_byte_near(addr++))) |
| 0 | 455 uart_putc(c); |
| 456 } | |
| 457 | |
| 458 void | |
| 459 uart_puts(const char *addr) { | |
| 460 while (*addr) | |
| 461 uart_putc(*addr++); | |
| 462 } | |
| 463 | |
| 13 | 464 void |
| 465 uart_puts_dec(uint8_t a, uint8_t l) { | |
| 466 char s[4]; | |
| 467 | |
| 468 if (l && a < 10) | |
| 469 uart_putsP(PSTR("0")); | |
| 470 uart_puts(utoa(a, s, 10)); | |
| 471 } | |
| 472 | |
| 473 void | |
| 474 uart_puts_hex(uint8_t a) { | |
| 475 char s[3]; | |
| 476 | |
| 477 if (a < 0x10) | |
| 478 uart_putc('0'); | |
| 479 | |
| 480 uart_puts(utoa(a, s, 16)); | |
| 481 } | |
| 482 | |
| 24 | 483 char |
| 0 | 484 uart_getc(void) { |
| 24 | 485 while (!(UCSRA & _BV(RXC))) |
| 0 | 486 ; |
| 487 | |
|
17
a58b41b7d15c
Covert to a later version of avr-libc. Stuff like not using inb/outb,
darius
parents:
16
diff
changeset
|
488 return (UDR); |
| 0 | 489 } |
| 4 | 490 |