| 1 | /* $Id: console.c,v 1.3 2010/06/30 19:40:49 simimeie Exp $ |
| 2 | * Functions for a serial console. |
| 3 | */ |
| 4 | |
| 5 | #include <avr/io.h> |
| 6 | #include <avr/interrupt.h> |
| 7 | #include <avr/pgmspace.h> |
| 8 | #include <avr/version.h> |
| 9 | #include <util/delay.h> |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include "console.h" |
| 13 | #include "ledpwm.h" |
| 14 | |
| 15 | /* PD0 is RXD, PD1 is TXD, but we don't need to address them manually */ |
| 16 | |
| 17 | /* Formula for calculating the value of UBRR from baudrate and cpufreq */ |
| 18 | #define UBRRCALC ((CPUFREQ / (16 * BAUDRATE)) - 1) |
| 19 | |
| 20 | #define INPUTBUFSIZE 30 |
| 21 | static uint8_t inputbuf[INPUTBUFSIZE]; |
| 22 | static uint8_t inputpos = 0; |
| 23 | #define OUTPUTBUFSIZE 400 |
| 24 | static uint8_t outputbuf[OUTPUTBUFSIZE]; |
| 25 | static uint16_t outputhead = 0; /* WARNING cannot be modified atomically */ |
| 26 | static uint16_t outputtail = 0; |
| 27 | static uint8_t opinprog = 0; |
| 28 | static uint8_t escstatus = 0; |
| 29 | static prog_uint8_t CRLF[] = "\r\n"; |
| 30 | static prog_uint8_t WELCOMEMSG[] = "\r\n"\ |
| 31 | "\r\n ******************************************"\ |
| 32 | "\r\n * HaWo Moodlight v0 (prototype) *"\ |
| 33 | "\r\n * (C) Michael 'PoempelFox' Meier 06/2010 *"\ |
| 34 | "\r\n ******************************************"\ |
| 35 | "\r\n"\ |
| 36 | "\r\nProcessor: atmega328"\ |
| 37 | "\r\nAVR-libc: " __AVR_LIBC_VERSION_STRING__ " (" __AVR_LIBC_DATE_STRING__ ")"\ |
| 38 | "\r\nSoftware Version 0.1, Compiled " __DATE__ " " __TIME__; |
| 39 | static prog_uint8_t PROMPT[] = "\r\nroot@moodlight# "; |
| 40 | |
| 41 | /* Handler for TXC (TX Complete) IRQ */ |
| 42 | ISR(USART_TX_vect) { |
| 43 | if (outputhead == outputtail) { /* Nothing more to send! */ |
| 44 | opinprog = 0; |
| 45 | } else { |
| 46 | UDR0 = outputbuf[outputhead]; |
| 47 | outputhead++; |
| 48 | if (outputhead >= OUTPUTBUFSIZE) { |
| 49 | outputhead = 0; |
| 50 | } |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | #if defined __GNUC__ |
| 55 | /* Unfortunately, gcc is very very dumb, and despite -Os tries to inline this |
| 56 | * function even though it is called about a thousand times, when only |
| 57 | * NETCONSOLE is defined, costing us more than 2.5 KiloBytes of Flash. |
| 58 | * Way to go, gcc "optimization". Though NETCONSOLE does not exist |
| 59 | * in this copy of the console code, it certainly can't hurt. */ |
| 60 | static void appendchar(uint8_t what) __attribute__((noinline)); |
| 61 | #endif /* __GNUC__ */ |
| 62 | /* This can only be called safely with interrupts disabled - remember that! */ |
| 63 | static void appendchar(uint8_t what) { |
| 64 | uint16_t newpos; |
| 65 | newpos = (outputtail + 1); |
| 66 | if (newpos >= OUTPUTBUFSIZE) { |
| 67 | newpos = 0; |
| 68 | } |
| 69 | if (newpos != outputhead) { |
| 70 | outputbuf[outputtail] = what; |
| 71 | outputtail = newpos; |
| 72 | } |
| 73 | if (!opinprog) { |
| 74 | /* Send the byte */ |
| 75 | UDR0 = what; |
| 76 | outputhead++; |
| 77 | if (outputhead >= OUTPUTBUFSIZE) { |
| 78 | outputhead = 0; |
| 79 | } |
| 80 | opinprog = 1; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | void console_printchar_noirq(uint8_t what) { |
| 85 | appendchar(what); |
| 86 | } |
| 87 | |
| 88 | /* This can only be called safely with interrupts disabled - remember that! */ |
| 89 | void console_printhex8_noirq(uint8_t what) { |
| 90 | uint8_t buf; |
| 91 | uint8_t i; |
| 92 | for (i=0; i<2; i++) { |
| 93 | buf = (uint8_t)(what & (uint8_t)0xF0) >> 4; |
| 94 | if (buf <= 9) { |
| 95 | buf += '0'; |
| 96 | } else { |
| 97 | buf += 'A' - 10; |
| 98 | } |
| 99 | appendchar(buf); |
| 100 | what <<= 4; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /* This can only be called safely with interrupts disabled - remember that! */ |
| 105 | void console_printdec_noirq(uint8_t what) { |
| 106 | uint8_t buf; |
| 107 | buf = what / 100; |
| 108 | appendchar(buf + '0'); |
| 109 | what %= 100; |
| 110 | buf = what / 10; |
| 111 | appendchar(buf + '0'); |
| 112 | buf = what % 10; |
| 113 | appendchar(buf + '0'); |
| 114 | } |
| 115 | |
| 116 | /* This can only be called safely with interrupts disabled - remember that! */ |
| 117 | void console_printbin8_noirq(uint8_t what) { |
| 118 | uint8_t i; |
| 119 | for (i = 0; i < 8; i++) { |
| 120 | if (what & 0x80) { |
| 121 | appendchar('1'); |
| 122 | } else { |
| 123 | appendchar('0'); |
| 124 | } |
| 125 | what <<= 1; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* This can only be called safely with interrupts disabled - remember that! */ |
| 130 | static void console_printtext_noirq(const uint8_t * what) { |
| 131 | while (*what) { |
| 132 | appendchar(*what); |
| 133 | what++; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /* This can only be called safely with interrupts disabled - remember that! */ |
| 138 | static void console_printpgm_noirq_P(PGM_P what) { |
| 139 | uint8_t t; |
| 140 | while ((t = pgm_read_byte(what++))) { |
| 141 | appendchar(t); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /* These are wrappers for our internal functions, disabling IRQs before |
| 146 | * calling them. */ |
| 147 | void console_printtext(const uint8_t * what) { |
| 148 | cli(); |
| 149 | console_printtext_noirq(what); |
| 150 | sei(); |
| 151 | } |
| 152 | |
| 153 | void console_printpgm_P(PGM_P what) { |
| 154 | cli(); |
| 155 | console_printpgm_noirq_P(what); |
| 156 | sei(); |
| 157 | } |
| 158 | |
| 159 | void console_printhex8(uint8_t what) { |
| 160 | cli(); |
| 161 | console_printhex8_noirq(what); |
| 162 | sei(); |
| 163 | } |
| 164 | |
| 165 | void console_printdec(uint8_t what) { |
| 166 | cli(); |
| 167 | console_printdec_noirq(what); |
| 168 | sei(); |
| 169 | } |
| 170 | |
| 171 | void console_init(void) { |
| 172 | /* Set Baud Rate */ |
| 173 | UBRR0H = (uint8_t)(UBRRCALC >> 8); |
| 174 | UBRR0L = (uint8_t)(UBRRCALC); |
| 175 | /* Set 8 Bit mode - how braindead is it to default to 5 bit?! */ |
| 176 | UCSR0C = /* _BV(URSEL) | */ _BV(UCSZ00) | _BV(UCSZ01); |
| 177 | /* Enable Send and Receive and IRQs */ |
| 178 | UCSR0B = _BV(TXEN0) | _BV(RXEN0) | _BV(TXCIE0) | _BV(RXCIE0); |
| 179 | console_printpgm_noirq_P(WELCOMEMSG); |
| 180 | console_printpgm_noirq_P(PROMPT); |
| 181 | return; |
| 182 | } |
| 183 | |
| 184 | /* Handler for RXC (RX Complete) IRQ. */ |
| 185 | /* We do all query processing here. */ |
| 186 | ISR(USART_RX_vect) { |
| 187 | uint8_t inpb; |
| 188 | |
| 189 | inpb = UDR0; |
| 190 | if (escstatus == 1) { |
| 191 | if (inpb == '[') { |
| 192 | escstatus = 2; |
| 193 | } else { |
| 194 | escstatus = 0; |
| 195 | appendchar(7); /* Bell */ |
| 196 | } |
| 197 | return; |
| 198 | } |
| 199 | if (escstatus == 2) { |
| 200 | switch (inpb) { |
| 201 | case 'A': /* Up */ |
| 202 | /* Try to restore the last comnmand */ |
| 203 | for (; inputpos > 0; inputpos--) { |
| 204 | appendchar(8); |
| 205 | } |
| 206 | while (inputbuf[inputpos]) { |
| 207 | appendchar(inputbuf[inputpos++]); |
| 208 | } |
| 209 | break; |
| 210 | case 'B': /* Down */ |
| 211 | /* New empty command line */ |
| 212 | for (; inputpos > 0; inputpos--) { |
| 213 | appendchar(8); |
| 214 | appendchar(' '); |
| 215 | appendchar(8); |
| 216 | } |
| 217 | break; |
| 218 | case 'C': /* Left */ |
| 219 | case 'D': /* Right */ |
| 220 | default: |
| 221 | appendchar(7); /* Bell */ |
| 222 | break; |
| 223 | }; |
| 224 | escstatus = 0; |
| 225 | return; |
| 226 | } |
| 227 | /* escstatus == 0, i.e. not in an escape */ |
| 228 | switch (inpb) { |
| 229 | case 0 ... 7: /* Nonprinting characters. Ignore. */ |
| 230 | case 11 ... 12: /* Nonprinting characters. Ignore. */ |
| 231 | case 14 ... 26: /* Nonprinting characters. Ignore. */ |
| 232 | case 28 ... 31: /* Nonprinting characters. Ignore. */ |
| 233 | case 0x7f ... 0xff: /* Nonprinting characters. Ignore. */ |
| 234 | console_printhex8_noirq(inpb); |
| 235 | appendchar(7); /* Bell */ |
| 236 | break; |
| 237 | case 9: /* tab. Should be implemented some day? */ |
| 238 | appendchar(7); /* Bell */ |
| 239 | break; |
| 240 | case 27: /* Escape */ |
| 241 | escstatus = 1; |
| 242 | break; |
| 243 | case 8: /* Backspace */ |
| 244 | if (inputpos > 0) { |
| 245 | inputpos--; |
| 246 | appendchar(inpb); |
| 247 | appendchar(' '); |
| 248 | appendchar(inpb); |
| 249 | } |
| 250 | break; |
| 251 | case '\r': /* 13 */ |
| 252 | case '\n': /* 10 */ |
| 253 | if (inputpos == 0) { |
| 254 | console_printpgm_noirq_P(PROMPT); |
| 255 | break; |
| 256 | } |
| 257 | inputbuf[inputpos] = 0; /* Null-terminate the string */ |
| 258 | console_printpgm_noirq_P(CRLF); |
| 259 | /* now lets see what it is */ |
| 260 | if (strcmp_P(inputbuf, PSTR("help")) == 0) { |
| 261 | console_printpgm_noirq_P(PSTR("Available commands:")); |
| 262 | console_printpgm_noirq_P(PSTR("\r\n motd repeat welcome message")); |
| 263 | console_printpgm_noirq_P(PSTR("\r\n showpins [x] shows the avrs inputpins")); |
| 264 | console_printpgm_noirq_P(PSTR("\r\n status show status / counters")); |
| 265 | console_printpgm_noirq_P(PSTR("\r\n [rgb] n sets the brightness of the red / green / blue LED to n")); |
| 266 | /* console_printpgm_noirq_P(PSTR("\r\n save saves settings to EEPROM")); */ |
| 267 | } else if (strcmp_P(inputbuf, PSTR("motd")) == 0) { |
| 268 | console_printpgm_noirq_P(WELCOMEMSG); |
| 269 | } else if (strncmp_P(inputbuf, PSTR("showpins"), 8) == 0) { |
| 270 | uint8_t which = 0; |
| 271 | uint8_t stal = 1; uint8_t endl = 4; |
| 272 | if (inputpos == 10) { |
| 273 | switch (inputbuf[9]) { |
| 274 | case 'a': |
| 275 | case 'A': |
| 276 | which = 1; break; |
| 277 | case 'b': |
| 278 | case 'B': |
| 279 | which = 2; break; |
| 280 | case 'c': |
| 281 | case 'C': |
| 282 | which = 3; break; |
| 283 | case 'd': |
| 284 | case 'D': |
| 285 | which = 4; break; |
| 286 | }; |
| 287 | } |
| 288 | if (which) { |
| 289 | stal = which; |
| 290 | endl = which; |
| 291 | } |
| 292 | for (which = stal; which <= endl; which++) { |
| 293 | uint8_t pstatus; |
| 294 | switch (which) { |
| 295 | /* case 1: pstatus = PINA; |
| 296 | console_printpgm_noirq_P(PSTR("PINA: 0x")); |
| 297 | break;*/ |
| 298 | case 2: pstatus = PINB; |
| 299 | console_printpgm_noirq_P(PSTR("PINB: 0x")); |
| 300 | break; |
| 301 | case 3: pstatus = PINC; |
| 302 | console_printpgm_noirq_P(PSTR("PINC: 0x")); |
| 303 | break; |
| 304 | case 4: pstatus = PIND; |
| 305 | console_printpgm_noirq_P(PSTR("PIND: 0x")); |
| 306 | break; |
| 307 | default: |
| 308 | pstatus = 0; |
| 309 | console_printpgm_noirq_P(PSTR("NOPIN: 0x")); |
| 310 | break; |
| 311 | }; |
| 312 | console_printhex8_noirq(pstatus); |
| 313 | appendchar(' '); |
| 314 | console_printbin8_noirq(pstatus); |
| 315 | if (which < endl) { |
| 316 | appendchar('\r'); appendchar('\n'); |
| 317 | } |
| 318 | } |
| 319 | /* } else if (strcmp_P(inputbuf, PSTR("save")) == 0) { |
| 320 | saveeepromsettings(); |
| 321 | console_printpgm_noirq_P(PSTR("Settings written to EEPROM."));*/ |
| 322 | } else if (strcmp_P(inputbuf, PSTR("status")) == 0) { |
| 323 | console_printpgm_noirq_P(PSTR("Current status:\r\n")); |
| 324 | console_printpgm_noirq_P(PSTR("red = ")); |
| 325 | console_printhex8_noirq(ledpwm_re); |
| 326 | console_printpgm_noirq_P(PSTR(", green = ")); |
| 327 | console_printhex8_noirq(ledpwm_gr); |
| 328 | console_printpgm_noirq_P(PSTR(", blue = ")); |
| 329 | console_printhex8_noirq(ledpwm_bl); |
| 330 | console_printpgm_noirq_P(PSTR(", brightness = ")); |
| 331 | console_printhex8_noirq(ledpwm_bri); |
| 332 | /*console_printpgm_noirq_P(CRLF);*/ |
| 333 | } else if (strncmp_P(inputbuf, PSTR("r "), 2) == 0) { |
| 334 | uint8_t v; |
| 335 | v = strtoul(&inputbuf[2], NULL, 0); |
| 336 | ledpwm_re = v; |
| 337 | ledpwm_setled(LEDPWM_REDLED, (((uint16_t)ledpwm_re * ledpwm_bri) / 255)); |
| 338 | console_printpgm_P(PSTR("RED value set to 0x")); |
| 339 | console_printhex8(v); |
| 340 | } else if (strncmp_P(inputbuf, PSTR("g "), 2) == 0) { |
| 341 | uint8_t v; |
| 342 | v = strtoul(&inputbuf[2], NULL, 0); |
| 343 | ledpwm_gr = v; |
| 344 | ledpwm_setled(LEDPWM_GREENLED, (((uint16_t)ledpwm_gr * ledpwm_bri) / 255)); |
| 345 | console_printpgm_P(PSTR("GREEN value set to 0x")); |
| 346 | console_printhex8(v); |
| 347 | } else if (strncmp_P(inputbuf, PSTR("b "), 2) == 0) { |
| 348 | uint8_t v; |
| 349 | v = strtoul(&inputbuf[2], NULL, 0); |
| 350 | ledpwm_bl = v; |
| 351 | ledpwm_setled(LEDPWM_BLUELED, (((uint16_t)ledpwm_bl * ledpwm_bri) / 255)); |
| 352 | console_printpgm_P(PSTR("BLUE value set to 0x")); |
| 353 | console_printhex8(v); |
| 354 | } else if (strncmp_P(inputbuf, PSTR("bri "), 2) == 0) { |
| 355 | uint8_t v; |
| 356 | v = strtoul(&inputbuf[4], NULL, 0); |
| 357 | ledpwm_bri = v; |
| 358 | ledpwm_setled(LEDPWM_REDLED, (((uint16_t)ledpwm_re * ledpwm_bri) / 255)); |
| 359 | ledpwm_setled(LEDPWM_GREENLED, (((uint16_t)ledpwm_gr * ledpwm_bri) / 255)); |
| 360 | ledpwm_setled(LEDPWM_BLUELED, (((uint16_t)ledpwm_bl * ledpwm_bri) / 255)); |
| 361 | console_printpgm_P(PSTR("brightness set to 0x")); |
| 362 | console_printhex8(v); |
| 363 | #ifdef JOKECMDS |
| 364 | } else if (strncmp_P(inputbuf, PSTR("ls"), 2) == 0) { |
| 365 | console_printpgm_noirq_P(PSTR("Total 4711\r\n")); |
| 366 | console_printpgm_noirq_P(PSTR("----r-xr-- 1 root root 42234223666 Dec 18 2004 duschcam1.avi")); |
| 367 | } else if (strncmp_P(inputbuf, PSTR("cat"), 3) == 0) { |
| 368 | if (inputpos > 4) { |
| 369 | console_printtext_noirq(&inputbuf[4]); |
| 370 | console_printpgm_noirq_P(PSTR(": Permission denied")); |
| 371 | } else { |
| 372 | console_printpgm_noirq_P(PSTR("Usage: cat filename")); |
| 373 | } |
| 374 | #endif /* JOKECMDS */ |
| 375 | } else { |
| 376 | #ifdef JOKECMDS |
| 377 | console_printpgm_noirq_P(PSTR("bash: ")); |
| 378 | console_printtext_noirq(inputbuf); |
| 379 | console_printpgm_noirq_P(PSTR(": command not found.")); |
| 380 | #else /* JOKECMDS */ |
| 381 | console_printpgm_noirq_P(PSTR("Unknown command: ")); |
| 382 | console_printtext_noirq(inputbuf); |
| 383 | #endif /* JOKECMDS */ |
| 384 | } |
| 385 | /* show PROMPT and go back to start. */ |
| 386 | console_printpgm_noirq_P(PROMPT); |
| 387 | inputpos = 0; |
| 388 | break; |
| 389 | default: |
| 390 | if (inputpos < (INPUTBUFSIZE - 1)) { /* -1 for terminating \0 */ |
| 391 | inputbuf[inputpos++] = inpb; |
| 392 | /* Echo the character */ |
| 393 | appendchar(inpb); |
| 394 | } else { |
| 395 | appendchar(7); /* Bell */ |
| 396 | } |
| 397 | }; |
| 398 | } |