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1 | /* $Id: console.c,v 1.4 2010/07/24 20:55:48 simimeie Exp $ |
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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> |
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9 | #include <avr/wdt.h> |
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10 | #include <util/delay.h> |
11 | #include <stdio.h> |
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12 | #include <stdlib.h> |
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13 | #include "console.h" |
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14 | #include "ledpwm.h" |
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15 | #include "rfm12.h" |
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16 | |
17 | /* PD0 is RXD, PD1 is TXD, but we don't need to address them manually */ |
18 | |
19 | /* Formula for calculating the value of UBRR from baudrate and cpufreq */ |
20 | #define UBRRCALC ((CPUFREQ / (16 * BAUDRATE)) - 1) |
21 | |
22 | #define INPUTBUFSIZE 30 |
23 | static uint8_t inputbuf[INPUTBUFSIZE]; |
24 | static uint8_t inputpos = 0; |
25 | #define OUTPUTBUFSIZE 400 |
26 | static uint8_t outputbuf[OUTPUTBUFSIZE]; |
27 | static uint16_t outputhead = 0; /* WARNING cannot be modified atomically */ |
28 | static uint16_t outputtail = 0; |
29 | static uint8_t opinprog = 0; |
30 | static uint8_t escstatus = 0; |
31 | static prog_uint8_t CRLF[] = "\r\n"; |
32 | static prog_uint8_t WELCOMEMSG[] = "\r\n"\ |
33 | "\r\n ******************************************"\ |
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34 | "\r\n * HaWo Moodlight v0 (prototype) *"\ |
35 | "\r\n * (C) Michael 'PoempelFox' Meier 06/2010 *"\ |
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36 | "\r\n ******************************************"\ |
37 | "\r\n"\ |
38 | "\r\nProcessor: atmega328"\ |
39 | "\r\nAVR-libc: " __AVR_LIBC_VERSION_STRING__ " (" __AVR_LIBC_DATE_STRING__ ")"\ |
40 | "\r\nSoftware Version 0.1, Compiled " __DATE__ " " __TIME__; |
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41 | static prog_uint8_t PROMPT[] = "\r\nroot@moodlight# "; |
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42 | |
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43 | uint8_t mcusr_mirror __attribute__ ((section (".noinit"))); |
44 | |
45 | /* This is needed to recover from a watchdog reset, as the watchdog |
46 | * stays active after the reset. |
47 | * The variable is just to make the reason of the last reset accessible |
48 | * later. */ |
49 | void get_mcusr(void) __attribute__((naked)) __attribute__((section(".init3"))); |
50 | void get_mcusr(void) { |
51 | mcusr_mirror = MCUSR; |
52 | MCUSR = 0; |
53 | wdt_disable(); |
54 | } |
55 | |
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56 | /* Handler for TXC (TX Complete) IRQ */ |
57 | ISR(USART_TX_vect) { |
58 | if (outputhead == outputtail) { /* Nothing more to send! */ |
59 | opinprog = 0; |
60 | } else { |
61 | UDR0 = outputbuf[outputhead]; |
62 | outputhead++; |
63 | if (outputhead >= OUTPUTBUFSIZE) { |
64 | outputhead = 0; |
65 | } |
66 | } |
67 | } |
68 | |
69 | #if defined __GNUC__ |
70 | /* Unfortunately, gcc is very very dumb, and despite -Os tries to inline this |
71 | * function even though it is called about a thousand times, when only |
72 | * NETCONSOLE is defined, costing us more than 2.5 KiloBytes of Flash. |
73 | * Way to go, gcc "optimization". Though NETCONSOLE does not exist |
74 | * in this copy of the console code, it certainly can't hurt. */ |
75 | static void appendchar(uint8_t what) __attribute__((noinline)); |
76 | #endif /* __GNUC__ */ |
77 | /* This can only be called safely with interrupts disabled - remember that! */ |
78 | static void appendchar(uint8_t what) { |
79 | uint16_t newpos; |
80 | newpos = (outputtail + 1); |
81 | if (newpos >= OUTPUTBUFSIZE) { |
82 | newpos = 0; |
83 | } |
84 | if (newpos != outputhead) { |
85 | outputbuf[outputtail] = what; |
86 | outputtail = newpos; |
87 | } |
88 | if (!opinprog) { |
89 | /* Send the byte */ |
90 | UDR0 = what; |
91 | outputhead++; |
92 | if (outputhead >= OUTPUTBUFSIZE) { |
93 | outputhead = 0; |
94 | } |
95 | opinprog = 1; |
96 | } |
97 | } |
98 | |
99 | void console_printchar_noirq(uint8_t what) { |
100 | appendchar(what); |
101 | } |
102 | |
103 | /* This can only be called safely with interrupts disabled - remember that! */ |
104 | void console_printhex8_noirq(uint8_t what) { |
105 | uint8_t buf; |
106 | uint8_t i; |
107 | for (i=0; i<2; i++) { |
108 | buf = (uint8_t)(what & (uint8_t)0xF0) >> 4; |
109 | if (buf <= 9) { |
110 | buf += '0'; |
111 | } else { |
112 | buf += 'A' - 10; |
113 | } |
114 | appendchar(buf); |
115 | what <<= 4; |
116 | } |
117 | } |
118 | |
119 | /* This can only be called safely with interrupts disabled - remember that! */ |
120 | void console_printdec_noirq(uint8_t what) { |
121 | uint8_t buf; |
122 | buf = what / 100; |
123 | appendchar(buf + '0'); |
124 | what %= 100; |
125 | buf = what / 10; |
126 | appendchar(buf + '0'); |
127 | buf = what % 10; |
128 | appendchar(buf + '0'); |
129 | } |
130 | |
131 | /* This can only be called safely with interrupts disabled - remember that! */ |
132 | void console_printbin8_noirq(uint8_t what) { |
133 | uint8_t i; |
134 | for (i = 0; i < 8; i++) { |
135 | if (what & 0x80) { |
136 | appendchar('1'); |
137 | } else { |
138 | appendchar('0'); |
139 | } |
140 | what <<= 1; |
141 | } |
142 | } |
143 | |
144 | /* This can only be called safely with interrupts disabled - remember that! */ |
145 | static void console_printtext_noirq(const uint8_t * what) { |
146 | while (*what) { |
147 | appendchar(*what); |
148 | what++; |
149 | } |
150 | } |
151 | |
152 | /* This can only be called safely with interrupts disabled - remember that! */ |
153 | static void console_printpgm_noirq_P(PGM_P what) { |
154 | uint8_t t; |
155 | while ((t = pgm_read_byte(what++))) { |
156 | appendchar(t); |
157 | } |
158 | } |
159 | |
160 | /* These are wrappers for our internal functions, disabling IRQs before |
161 | * calling them. */ |
162 | void console_printtext(const uint8_t * what) { |
163 | cli(); |
164 | console_printtext_noirq(what); |
165 | sei(); |
166 | } |
167 | |
168 | void console_printpgm_P(PGM_P what) { |
169 | cli(); |
170 | console_printpgm_noirq_P(what); |
171 | sei(); |
172 | } |
173 | |
174 | void console_printhex8(uint8_t what) { |
175 | cli(); |
176 | console_printhex8_noirq(what); |
177 | sei(); |
178 | } |
179 | |
180 | void console_printdec(uint8_t what) { |
181 | cli(); |
182 | console_printdec_noirq(what); |
183 | sei(); |
184 | } |
185 | |
186 | void console_init(void) { |
187 | /* Set Baud Rate */ |
188 | UBRR0H = (uint8_t)(UBRRCALC >> 8); |
189 | UBRR0L = (uint8_t)(UBRRCALC); |
190 | /* Set 8 Bit mode - how braindead is it to default to 5 bit?! */ |
191 | UCSR0C = /* _BV(URSEL) | */ _BV(UCSZ00) | _BV(UCSZ01); |
192 | /* Enable Send and Receive and IRQs */ |
193 | UCSR0B = _BV(TXEN0) | _BV(RXEN0) | _BV(TXCIE0) | _BV(RXCIE0); |
194 | console_printpgm_noirq_P(WELCOMEMSG); |
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195 | console_printpgm_noirq_P(PSTR("\r\nNOTE: last reset was from")); |
196 | if (mcusr_mirror & _BV(WDRF)) { |
197 | console_printpgm_noirq_P(PSTR(" WatchdogTimer")); |
198 | } |
199 | if (mcusr_mirror & _BV(BORF)) { |
200 | console_printpgm_noirq_P(PSTR(" Brownout")); |
201 | } |
202 | if (mcusr_mirror & _BV(EXTRF)) { |
203 | console_printpgm_noirq_P(PSTR(" ExternalReset")); |
204 | } |
205 | if (mcusr_mirror & _BV(PORF)) { |
206 | console_printpgm_noirq_P(PSTR(" PowerOn")); |
207 | } |
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208 | console_printpgm_noirq_P(PROMPT); |
209 | return; |
210 | } |
211 | |
212 | /* Handler for RXC (RX Complete) IRQ. */ |
213 | /* We do all query processing here. */ |
214 | ISR(USART_RX_vect) { |
215 | uint8_t inpb; |
216 | |
217 | inpb = UDR0; |
218 | if (escstatus == 1) { |
219 | if (inpb == '[') { |
220 | escstatus = 2; |
221 | } else { |
222 | escstatus = 0; |
223 | appendchar(7); /* Bell */ |
224 | } |
225 | return; |
226 | } |
227 | if (escstatus == 2) { |
228 | switch (inpb) { |
229 | case 'A': /* Up */ |
230 | /* Try to restore the last comnmand */ |
231 | for (; inputpos > 0; inputpos--) { |
232 | appendchar(8); |
233 | } |
234 | while (inputbuf[inputpos]) { |
235 | appendchar(inputbuf[inputpos++]); |
236 | } |
237 | break; |
238 | case 'B': /* Down */ |
239 | /* New empty command line */ |
240 | for (; inputpos > 0; inputpos--) { |
241 | appendchar(8); |
242 | appendchar(' '); |
243 | appendchar(8); |
244 | } |
245 | break; |
246 | case 'C': /* Left */ |
247 | case 'D': /* Right */ |
248 | default: |
249 | appendchar(7); /* Bell */ |
250 | break; |
251 | }; |
252 | escstatus = 0; |
253 | return; |
254 | } |
255 | /* escstatus == 0, i.e. not in an escape */ |
256 | switch (inpb) { |
257 | case 0 ... 7: /* Nonprinting characters. Ignore. */ |
258 | case 11 ... 12: /* Nonprinting characters. Ignore. */ |
259 | case 14 ... 26: /* Nonprinting characters. Ignore. */ |
260 | case 28 ... 31: /* Nonprinting characters. Ignore. */ |
261 | case 0x7f ... 0xff: /* Nonprinting characters. Ignore. */ |
262 | console_printhex8_noirq(inpb); |
263 | appendchar(7); /* Bell */ |
264 | break; |
265 | case 9: /* tab. Should be implemented some day? */ |
266 | appendchar(7); /* Bell */ |
267 | break; |
268 | case 27: /* Escape */ |
269 | escstatus = 1; |
270 | break; |
271 | case 8: /* Backspace */ |
272 | if (inputpos > 0) { |
273 | inputpos--; |
274 | appendchar(inpb); |
275 | appendchar(' '); |
276 | appendchar(inpb); |
277 | } |
278 | break; |
279 | case '\r': /* 13 */ |
280 | case '\n': /* 10 */ |
281 | if (inputpos == 0) { |
282 | console_printpgm_noirq_P(PROMPT); |
283 | break; |
284 | } |
285 | inputbuf[inputpos] = 0; /* Null-terminate the string */ |
286 | console_printpgm_noirq_P(CRLF); |
287 | /* now lets see what it is */ |
288 | if (strcmp_P(inputbuf, PSTR("help")) == 0) { |
289 | console_printpgm_noirq_P(PSTR("Available commands:")); |
290 | console_printpgm_noirq_P(PSTR("\r\n motd repeat welcome message")); |
291 | console_printpgm_noirq_P(PSTR("\r\n showpins [x] shows the avrs inputpins")); |
292 | console_printpgm_noirq_P(PSTR("\r\n status show status / counters")); |
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293 | console_printpgm_noirq_P(PSTR("\r\n [rgb] n sets the brightness of the red / green / blue LED to n")); |
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294 | console_printpgm_noirq_P(PSTR("\r\n rfstatus show RFM12 status")); |
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295 | /* console_printpgm_noirq_P(PSTR("\r\n save saves settings to EEPROM")); */ |
296 | } else if (strcmp_P(inputbuf, PSTR("motd")) == 0) { |
297 | console_printpgm_noirq_P(WELCOMEMSG); |
298 | } else if (strncmp_P(inputbuf, PSTR("showpins"), 8) == 0) { |
299 | uint8_t which = 0; |
300 | uint8_t stal = 1; uint8_t endl = 4; |
301 | if (inputpos == 10) { |
302 | switch (inputbuf[9]) { |
303 | case 'a': |
304 | case 'A': |
305 | which = 1; break; |
306 | case 'b': |
307 | case 'B': |
308 | which = 2; break; |
309 | case 'c': |
310 | case 'C': |
311 | which = 3; break; |
312 | case 'd': |
313 | case 'D': |
314 | which = 4; break; |
315 | }; |
316 | } |
317 | if (which) { |
318 | stal = which; |
319 | endl = which; |
320 | } |
321 | for (which = stal; which <= endl; which++) { |
322 | uint8_t pstatus; |
323 | switch (which) { |
324 | /* case 1: pstatus = PINA; |
325 | console_printpgm_noirq_P(PSTR("PINA: 0x")); |
326 | break;*/ |
327 | case 2: pstatus = PINB; |
328 | console_printpgm_noirq_P(PSTR("PINB: 0x")); |
329 | break; |
330 | case 3: pstatus = PINC; |
331 | console_printpgm_noirq_P(PSTR("PINC: 0x")); |
332 | break; |
333 | case 4: pstatus = PIND; |
334 | console_printpgm_noirq_P(PSTR("PIND: 0x")); |
335 | break; |
336 | default: |
337 | pstatus = 0; |
338 | console_printpgm_noirq_P(PSTR("NOPIN: 0x")); |
339 | break; |
340 | }; |
341 | console_printhex8_noirq(pstatus); |
342 | appendchar(' '); |
343 | console_printbin8_noirq(pstatus); |
344 | if (which < endl) { |
345 | appendchar('\r'); appendchar('\n'); |
346 | } |
347 | } |
348 | /* } else if (strcmp_P(inputbuf, PSTR("save")) == 0) { |
349 | saveeepromsettings(); |
350 | console_printpgm_noirq_P(PSTR("Settings written to EEPROM."));*/ |
351 | } else if (strcmp_P(inputbuf, PSTR("status")) == 0) { |
352 | console_printpgm_noirq_P(PSTR("Current status:\r\n")); |
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353 | console_printpgm_noirq_P(PSTR("red = ")); |
354 | console_printhex8_noirq(ledpwm_re); |
355 | console_printpgm_noirq_P(PSTR(", green = ")); |
356 | console_printhex8_noirq(ledpwm_gr); |
357 | console_printpgm_noirq_P(PSTR(", blue = ")); |
358 | console_printhex8_noirq(ledpwm_bl); |
359 | console_printpgm_noirq_P(PSTR(", brightness = ")); |
360 | console_printhex8_noirq(ledpwm_bri); |
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361 | } else if (strncmp_P(inputbuf, PSTR("r "), 2) == 0) { |
362 | uint8_t v; |
363 | v = strtoul(&inputbuf[2], NULL, 0); |
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364 | ledpwm_re = v; |
365 | ledpwm_setled(LEDPWM_REDLED, (((uint16_t)ledpwm_re * ledpwm_bri) / 255)); |
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366 | console_printpgm_noirq_P(PSTR("RED value set to 0x")); |
367 | console_printhex8_noirq(v); |
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368 | } else if (strncmp_P(inputbuf, PSTR("g "), 2) == 0) { |
369 | uint8_t v; |
370 | v = strtoul(&inputbuf[2], NULL, 0); |
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371 | ledpwm_gr = v; |
372 | ledpwm_setled(LEDPWM_GREENLED, (((uint16_t)ledpwm_gr * ledpwm_bri) / 255)); |
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373 | console_printpgm_noirq_P(PSTR("GREEN value set to 0x")); |
374 | console_printhex8_noirq(v); |
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375 | } else if (strncmp_P(inputbuf, PSTR("b "), 2) == 0) { |
376 | uint8_t v; |
377 | v = strtoul(&inputbuf[2], NULL, 0); |
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378 | ledpwm_bl = v; |
379 | ledpwm_setled(LEDPWM_BLUELED, (((uint16_t)ledpwm_bl * ledpwm_bri) / 255)); |
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380 | console_printpgm_noirq_P(PSTR("BLUE value set to 0x")); |
381 | console_printhex8_noirq(v); |
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382 | } else if (strncmp_P(inputbuf, PSTR("bri "), 2) == 0) { |
383 | uint8_t v; |
384 | v = strtoul(&inputbuf[4], NULL, 0); |
385 | ledpwm_bri = v; |
386 | ledpwm_setled(LEDPWM_REDLED, (((uint16_t)ledpwm_re * ledpwm_bri) / 255)); |
387 | ledpwm_setled(LEDPWM_GREENLED, (((uint16_t)ledpwm_gr * ledpwm_bri) / 255)); |
388 | ledpwm_setled(LEDPWM_BLUELED, (((uint16_t)ledpwm_bl * ledpwm_bri) / 255)); |
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389 | console_printpgm_noirq_P(PSTR("brightness set to 0x")); |
390 | console_printhex8_noirq(v); |
391 | } else if (strcmp_P(inputbuf, PSTR("rfstatus")) == 0) { |
392 | uint32_t st; |
393 | st = rfm12_readstatus(); |
394 | console_printpgm_noirq_P(PSTR("rfm12 status is ")); |
395 | console_printhex8_noirq(st >> 24); |
396 | console_printhex8_noirq(st >> 16); |
397 | console_printhex8_noirq(st >> 8); |
398 | console_printhex8_noirq(st >> 0); |
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399 | #ifdef JOKECMDS |
400 | } else if (strncmp_P(inputbuf, PSTR("ls"), 2) == 0) { |
401 | console_printpgm_noirq_P(PSTR("Total 4711\r\n")); |
402 | console_printpgm_noirq_P(PSTR("----r-xr-- 1 root root 42234223666 Dec 18 2004 duschcam1.avi")); |
403 | } else if (strncmp_P(inputbuf, PSTR("cat"), 3) == 0) { |
404 | if (inputpos > 4) { |
405 | console_printtext_noirq(&inputbuf[4]); |
406 | console_printpgm_noirq_P(PSTR(": Permission denied")); |
407 | } else { |
408 | console_printpgm_noirq_P(PSTR("Usage: cat filename")); |
409 | } |
410 | #endif /* JOKECMDS */ |
411 | } else { |
412 | #ifdef JOKECMDS |
413 | console_printpgm_noirq_P(PSTR("bash: ")); |
414 | console_printtext_noirq(inputbuf); |
415 | console_printpgm_noirq_P(PSTR(": command not found.")); |
416 | #else /* JOKECMDS */ |
417 | console_printpgm_noirq_P(PSTR("Unknown command: ")); |
418 | console_printtext_noirq(inputbuf); |
419 | #endif /* JOKECMDS */ |
420 | } |
421 | /* show PROMPT and go back to start. */ |
422 | console_printpgm_noirq_P(PROMPT); |
423 | inputpos = 0; |
424 | break; |
425 | default: |
426 | if (inputpos < (INPUTBUFSIZE - 1)) { /* -1 for terminating \0 */ |
427 | inputbuf[inputpos++] = inpb; |
428 | /* Echo the character */ |
429 | appendchar(inpb); |
430 | } else { |
431 | appendchar(7); /* Bell */ |
432 | } |
433 | }; |
434 | } |