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1 | ; Print and Debug functions | |
2 | ; | |
3 | ; Copyright (C) 2010-2013 Leo C. | |
4 | ; | |
5 | ; This file is part of avrcpm. | |
6 | ; | |
7 | ; avrcpm is free software: you can redistribute it and/or modify it | |
8 | ; under the terms of the GNU General Public License as published by | |
9 | ; the Free Software Foundation, either version 3 of the License, or | |
10 | ; (at your option) any later version. | |
11 | ; | |
12 | ; avrcpm is distributed in the hope that it will be useful, | |
13 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ; GNU General Public License for more details. | |
16 | ; | |
17 | ; You should have received a copy of the GNU General Public License | |
18 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
19 | ; | |
20 | ; $Id: utils.asm 93 2014-01-03 16:32:32Z rapid $ | |
21 | ; | |
22 | ||
23 | ||
24 | .cseg | |
25 | ||
26 | ||
27 | ;Print a unsigned lonng value to the uart | |
28 | ; r15:r14:temp2:temp = value | |
29 | ||
30 | print_ultoa: | |
31 | push yh | |
32 | push yl | |
33 | push z_flags | |
34 | push r15 | |
35 | push r14 | |
36 | push temp2 | |
37 | push temp | |
38 | ||
39 | clr yl ;yl = stack level | |
40 | ||
41 | ultoa1: ldi z_flags, 32 ;yh = r15:temp % 10 | |
42 | clr yh ;r15:temp /= 10 | |
43 | ultoa2: lsl temp | |
44 | rol temp2 | |
45 | rol r14 | |
46 | rol r15 | |
47 | rol yh | |
48 | cpi yh,10 | |
49 | brcs ultoa3 | |
50 | subi yh,10 | |
51 | inc temp | |
52 | ultoa3: dec z_flags | |
53 | brne ultoa2 | |
54 | cpi yh, 10 ;yh is a numeral digit '0'-'9' | |
55 | subi yh, -'0' | |
56 | push yh ;Stack it | |
57 | inc yl | |
58 | cp temp,_0 ;Repeat until r15:temp gets zero | |
59 | cpc temp2,_0 | |
60 | cpc r14,_0 | |
61 | cpc r15,_0 | |
62 | brne ultoa1 | |
63 | ||
64 | ldi temp, '0' | |
65 | ultoa5: cpi yl,3 ; at least 3 digits (ms) | |
66 | brge ultoa6 | |
67 | push temp | |
68 | inc yl | |
69 | rjmp ultoa5 | |
70 | ||
71 | ultoa6: pop temp ;Flush stacked digits | |
72 | rcall uartputc | |
73 | dec yl | |
74 | brne ultoa6 | |
75 | ||
76 | pop temp | |
77 | pop temp2 | |
78 | pop r14 | |
79 | pop r15 | |
80 | pop z_flags | |
81 | pop yl | |
82 | pop yh | |
83 | ret | |
84 | ||
85 | ||
86 | ;Prints temp2:temp in hex to the uart | |
87 | printhexw: | |
88 | push temp | |
89 | mov temp,temp2 | |
90 | rcall printhex | |
91 | pop temp | |
92 | ;fall thru | |
93 | ||
94 | ;Prints temp in hex to the uart | |
95 | printhex: | |
96 | swap temp | |
97 | rcall printhexn | |
98 | swap temp | |
99 | ;fall thru | |
100 | ||
101 | ;Prints the lower nibble | |
102 | printhexn: | |
103 | push temp | |
104 | andi temp,0xf | |
105 | cpi temp,0xA | |
106 | brlo printhexn_isno | |
107 | subi temp,-7 | |
108 | printhexn_isno: | |
109 | subi temp,-'0' | |
110 | rcall uartputc | |
111 | pop temp | |
112 | ret | |
113 | ||
114 | ||
115 | ; Prints a single space | |
116 | ||
117 | printspace: | |
118 | push temp | |
119 | ldi temp,' ' | |
120 | rcall uartputc | |
121 | pop temp | |
122 | ret | |
123 | ||
124 | ;----------------------------------------------------------------------- | |
125 | ;Prints the zero-terminated string following the call statement. | |
126 | ||
127 | printstr: | |
128 | push zh ;SP+5 | |
129 | push zl ; 4 | |
130 | push yh ; 3 | |
131 | push yl ; 2 | |
132 | push temp ; 1 | |
133 | in yh,sph | |
134 | in yl,spl | |
135 | ldd zl,y+7 ;SP+7 == "return adr." == String adr. | |
136 | ldd zh,y+6 ;SP+6 | |
137 | ||
138 | lsl zl ;word to byte conv. | |
139 | rol zh | |
140 | printstr_loop: | |
141 | lpm temp,z+ | |
142 | cpi temp,0 | |
143 | breq printstr_end | |
144 | rcall uartputc | |
145 | cpi temp,13 | |
146 | brne printstr_loop | |
147 | ldi temp,10 | |
148 | rcall uartputc | |
149 | rjmp printstr_loop | |
150 | ||
151 | printstr_end: | |
152 | adiw zl,1 ;rounding up | |
153 | lsr zh ;byte to word conv. | |
154 | ror zl | |
155 | ||
156 | std y+7,zl | |
157 | std y+6,zh | |
158 | pop temp | |
159 | pop yl | |
160 | pop yh | |
161 | pop zl | |
162 | pop zh | |
163 | ret | |
164 | ||
165 | ; ------------------------ String functions ------------------------- | |
166 | ; | |
167 | ||
168 | #if 0 | |
169 | ; String compare (z, y), one z-string in flash. | |
170 | ||
171 | strcmp_p: | |
172 | ld temp,y+ | |
173 | lpm _tmp0, z+ | |
174 | sub temp,_tmp0 | |
175 | brne strcmp_pex | |
176 | tst _tmp0 | |
177 | brne strcmp_p | |
178 | sub temp,temp | |
179 | strcmp_pex: | |
180 | ret | |
181 | ||
182 | #endif | |
183 | ||
184 | #if 0 | |
185 | ||
186 | strcmp_p: | |
187 | ld temp,y+ | |
188 | lpm _tmp0,z+ | |
189 | sub temp,_tmp0 | |
190 | cpse _tmp0,_0 | |
191 | breq strcmp_p | |
192 | ret | |
193 | ||
194 | ||
195 | #endif | |
196 | ||
197 | ;----------------------------------------------------------------------- | |
198 | ; String compare (x, y, temp2). Max temp2 bytes are compared. | |
199 | ||
200 | strncmp_p: | |
201 | subi temp2,1 | |
202 | brcs strncmp_peq | |
203 | ld temp,y+ | |
204 | lpm _tmp0, z+ | |
205 | sub temp,_tmp0 | |
206 | brne strncmp_pex | |
207 | tst _tmp0 | |
208 | brne strncmp_p | |
209 | strncmp_peq: | |
210 | sub temp,temp | |
211 | strncmp_pex: | |
212 | ret | |
213 | ||
214 | ;----------------------------------------------------------------------- | |
215 | ; Memory compare: DRAM - AVR-RAM | |
216 | ; DRAM-Addr. in x, AVRRAM-Addr. in y | |
217 | ; Compare temp3 bytes. | |
218 | ; | |
219 | ; Return Z-Flag == 1 if match | |
220 | ; temp, _tmp0 destroyed | |
221 | ; | |
222 | ||
223 | memcmp_d: | |
224 | rcall dram_read_pp | |
225 | ld _tmp0,y+ | |
226 | cp temp,_tmp0 | |
227 | brne memcmpd_nomatch | |
228 | dec temp3 | |
229 | brne memcmp_d | |
230 | memcmpd_nomatch: | |
231 | ret | |
232 | ||
233 | ; --------------- Debugging stuff --------------- | |
234 | ||
235 | ||
236 | .if SRAM_FILL | |
237 | ||
238 | stackusage_print: | |
239 | ldiw z,ramtop | |
240 | ldi temp, low(RAMEND+1) | |
241 | ldi temp2,high(RAMEND+1) | |
242 | ldi temp3,SRAMFILL_VAL | |
243 | stack_search_l: | |
244 | ld _tmp0,z+ | |
245 | cp temp3,_tmp0 | |
246 | brne stack_search_found | |
247 | cp zl,temp | |
248 | cpc zh,temp2 | |
249 | brne stack_search_l | |
250 | ||
251 | stack_search_found: | |
252 | sbiw z,1 | |
253 | sub temp, zl | |
254 | sbc temp2,zh | |
255 | printnewline | |
256 | printstring "Stack used (bytes): " | |
257 | push r15 | |
258 | push r14 | |
259 | clr r14 | |
260 | clr r15 | |
261 | rcall print_ultoa | |
262 | pop r14 | |
263 | pop r15 | |
264 | ret | |
265 | .endif | |
266 | ||
267 | ||
268 | .if MEMDUMP_DEBUG | |
269 | ||
270 | ;----------------------------------------------------------------------- | |
271 | ; Prints 16 bytes RAM, pointed to by Z in hex. | |
272 | ||
273 | dbg_hexdump_line: ;Address in z | |
274 | push temp2 | |
275 | push temp | |
276 | ; printnewline | |
277 | movw temp,z ;Print address | |
278 | rcall printhexw | |
279 | printstring ":" | |
280 | ldi temp2,16 ;16 byte per line | |
281 | dbg_hdl1: | |
282 | cpi temp2,8 | |
283 | brne PC+2 | |
284 | rcall printspace | |
285 | ||
286 | rcall printspace | |
287 | ld temp,z+ | |
288 | rcall printhex | |
289 | dec temp2 | |
290 | brne dbg_hdl1 | |
291 | sbiw z,16 | |
292 | ||
293 | rcall printspace | |
294 | rcall printspace | |
295 | ldi temp2,16 | |
296 | dbg_hdl2: | |
297 | ld temp,z+ | |
298 | cpi temp,' ' | |
299 | brlo dbg_hdlpd | |
300 | cpi temp,0x7F | |
301 | brlo dbg_hdlp | |
302 | dbg_hdlpd: | |
303 | ldi temp,'.' | |
304 | dbg_hdlp: | |
305 | rcall uartputc | |
306 | dec temp2 | |
307 | brne dbg_hdl2 | |
308 | sbiw z,16 | |
309 | rcall printspace | |
310 | pop temp | |
311 | pop temp2 | |
312 | printnewline | |
313 | ret | |
314 | ||
315 | ||
316 | ; Prints temp2 bytes RAM, pointed to by Z in hex. | |
317 | ||
318 | dbg_hexdump: ;Address in z | |
319 | push temp | |
320 | push temp2 | |
321 | ; printnewline | |
322 | movw temp,z ;Print address | |
323 | rcall printhexw | |
324 | printstring ":" | |
325 | pop temp2 | |
326 | push temp2 | |
327 | dbg_hd1: | |
328 | rcall printspace | |
329 | ld temp,z+ | |
330 | rcall printhex | |
331 | dec temp2 | |
332 | brne dbg_hd1 | |
333 | pop temp2 | |
334 | sub zl,temp2 | |
335 | sbc zh,_0 | |
336 | rcall printspace | |
337 | rcall printspace | |
338 | dbg_hd2: | |
339 | ld temp,z+ | |
340 | cpi temp,' ' | |
341 | brlo dbg_hdpd | |
342 | cpi temp,0x7F | |
343 | brlo dbg_hdp | |
344 | dbg_hdpd: | |
345 | ldi temp,'.' | |
346 | dbg_hdp: | |
347 | rcall uartputc | |
348 | dec temp2 | |
349 | brne dbg_hd2 | |
350 | pop temp | |
351 | printnewline | |
352 | ret | |
353 | ||
354 | .endif | |
355 | ||
356 | ;----------------------------------------------------------------------- | |
357 | ; Print a line with the 8080/Z80 registers | |
358 | ||
359 | printregs: | |
360 | mov temp,z_flags | |
361 | rcall printflags | |
362 | printstring " A =" | |
363 | mov temp,z_a | |
364 | rcall printhex | |
365 | printstring " BC =" | |
366 | #if 1 | |
367 | movw temp,z_c | |
368 | #else | |
369 | ldd temp2,y+oz_b | |
370 | ldd temp,y+oz_c | |
371 | #endif | |
372 | rcall printhexw | |
373 | printstring " DE =" | |
374 | #if 1 | |
375 | movw temp,z_e | |
376 | #else | |
377 | ldd temp2,y+oz_d | |
378 | ldd temp,y+oz_e | |
379 | #endif | |
380 | rcall printhexw | |
381 | printstring " HL =" | |
382 | #if 1 | |
383 | movw temp,z_l | |
384 | #else | |
385 | ldd temp,y+oz_l | |
386 | ldd temp2,y+oz_h | |
387 | #endif | |
388 | rcall printhexw | |
389 | printstring " SP=" | |
390 | movw temp, z_spl | |
391 | rcall printhexw | |
392 | printstring " PC=" | |
393 | movw temp, z_pcl | |
394 | rcall printhexw | |
395 | printstring " " | |
396 | movw xl,z_pcl | |
397 | lcall dram_read_pp | |
398 | rcall printhex | |
399 | printstring " " | |
400 | lcall dram_read_pp | |
401 | rcall printhex | |
402 | printstring " " | |
403 | lcall dram_read | |
404 | rcall printhex | |
405 | printstring " " | |
406 | ||
407 | #if EM_Z80 | |
408 | ldd temp,y+oz_f2 | |
409 | rcall printflags | |
410 | printstring " a'=" | |
411 | ldd temp,y+oz_a2 | |
412 | rcall printhex | |
413 | printstring " bc'=" | |
414 | ldd temp2,y+oz_b2 | |
415 | ldd temp,y+oz_c2 | |
416 | rcall printhexw | |
417 | printstring " de'=" | |
418 | ldd temp2,y+oz_d2 | |
419 | ldd temp,y+oz_e2 | |
420 | rcall printhexw | |
421 | printstring " hl'=" | |
422 | ldd temp2,y+oz_h2 | |
423 | ldd temp,y+oz_l2 | |
424 | rcall printhexw | |
425 | printstring " IX=" | |
426 | ldd temp2,y+oz_xh | |
427 | ldd temp,y+oz_xl | |
428 | rcall printhexw | |
429 | printstring " IY=" | |
430 | ldd temp2,y+oz_yh | |
431 | ldd temp,y+oz_yl | |
432 | rcall printhexw | |
433 | printstring " I=" | |
434 | ldd temp,y+oz_i | |
435 | rcall printhex | |
436 | ||
437 | printstring " " | |
438 | #endif | |
439 | ret | |
440 | ||
441 | ||
442 | #if EM_Z80 | |
443 | zflags_to_ch: | |
444 | .db "SZ H VNC",0,0 | |
445 | #else | |
446 | zflags_to_ch: | |
447 | .db "SZ H PNC",0,0 | |
448 | #endif | |
449 | ||
450 | printflags: | |
451 | push temp2 | |
452 | mov temp2,temp | |
453 | printnewline | |
454 | push zl | |
455 | push zh | |
456 | ldiw z,zflags_to_ch*2 | |
457 | pr_zfl_next: | |
458 | lpm temp,z+ | |
459 | tst temp | |
460 | breq pr_zfl_end | |
461 | cpi temp,' ' ; Test if no flag | |
462 | breq pr_zfl_noflag | |
463 | sbrs temp2,7 ; | |
464 | ldi temp,' ' ; Flag not set | |
465 | rcall uartputc | |
466 | pr_zfl_noflag: | |
467 | rol temp2 | |
468 | rjmp pr_zfl_next | |
469 | pr_zfl_end: | |
470 | pop zh | |
471 | pop zl | |
472 | pop temp2 | |
473 | ret | |
474 | ||
475 | ; vim:set ts=8 noet nowrap |