source: buchla-emu/emu/ser.c@ e5a7d09

Last change on this file since e5a7d09 was f0af168, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Don't scale mouse movements on OS X.
  • Property mode set to 100644
File size: 10.8 KB
Line 
1/*
2 * Copyright (C) 2017 The Contributors
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or (at
7 * your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * A copy of the GNU General Public License can be found in the file
15 * "gpl.txt" in the top directory of this repository.
16 */
17
18#include <all.h>
19
20#define ver(...) _ver(ser_verbose, 0, __VA_ARGS__)
21#define ver2(...) _ver(ser_verbose, 1, __VA_ARGS__)
22#define ver3(...) _ver(ser_verbose, 2, __VA_ARGS__)
23
24int32_t ser_verbose = 0;
25
26#define WIN_W (1520 / 2)
27#define WIN_H (950 / 2)
28
29#define BEL_CYC 10000
30#define MOU_CYC 10000
31
32#if defined EMU_WIN
33#define MOU_DIV 64
34#elif defined EMU_OS_X
35#define MOU_DIV 1
36#else
37#define MOU_DIV 4
38#endif
39
40#define CON_W 80
41#define CON_H 25
42
43#define CON_BGR 0x00000000
44#define CON_BEL 0x00808080
45#define CON_CUR 0x00e87000
46#define CON_FGR ((SDL_Color){ .r = 255, .b = 255, .g = 255, .a = 255 })
47
48#define BUF_SZ 16
49
50#define REG_IER_ISR 0
51#define REG_CFR_SR 1
52#define REG_CDR_TBR 2
53#define REG_TDR_RDR 3
54
55typedef struct {
56 int32_t buf_hd;
57 int32_t buf_tl;
58 uint8_t buf[BUF_SZ];
59 bool irq_r;
60 bool irq_t;
61 bool rdr_ok;
62 uint8_t rdr;
63} state_t;
64
65static state_t state[] = {
66 { .buf_hd = 0, .buf_tl = 0, .irq_r = false, .irq_t = false, .rdr_ok = false, .rdr = 0x00 },
67 { .buf_hd = 0, .buf_tl = 0, .irq_r = false, .irq_t = false, .rdr_ok = false, .rdr = 0x00 }
68};
69
70static uint8_t mem[CON_H][CON_W];
71
72static SDL_Window *win;
73uint32_t ser_win;
74
75static SDL_Renderer *ren;
76static SDL_atomic_t frame;
77
78static TTF_Font *fon;
79static int32_t fon_w, fon_h;
80
81static int32_t sur_w, sur_h;
82static SDL_Surface *sur;
83
84static int32_t cur_x = 0, cur_y = 0;
85static int32_t bel = 0;
86
87static int32_t mou;
88static int32_t mou_dx, mou_dy;
89static bool mou_l, mou_r;
90
91static void scroll(void)
92{
93 memmove(mem, mem + 1, (CON_H - 1) * CON_W);
94 memset(mem + (CON_H - 1), ' ', CON_W);
95}
96
97static void forw(void)
98{
99 if (cur_x < CON_W - 1) {
100 ++cur_x;
101 return;
102 }
103
104 if (cur_y == CON_H - 1) {
105 cur_x = 0;
106 scroll();
107 return;
108 }
109
110 cur_x = 0;
111 ++cur_y;
112}
113
114static void back(void)
115{
116 if (cur_x > 0) {
117 --cur_x;
118 return;
119 }
120
121 if (cur_y == 0) {
122 return;
123 }
124
125 cur_x = CON_W - 1;
126 --cur_y;
127}
128
129static void down(void)
130{
131 if (cur_y < CON_H - 1) {
132 ++cur_y;
133 return;
134 }
135
136 scroll();
137}
138
139static void echo(uint8_t c)
140{
141 if (c < 32) {
142 switch (c) {
143 case '\r':
144 cur_x = 0;
145 break;
146
147 case '\n':
148 down();
149 break;
150
151 case '\b':
152 back();
153 break;
154
155 case '\a':
156 bel = BEL_CYC;
157 break;
158
159 default:
160 echo('^');
161 echo((uint8_t)(c + '@'));
162 return;
163 }
164 }
165 else {
166 mem[cur_y][cur_x] = c;
167 forw();
168 }
169
170 SDL_AtomicAdd(&frame, 1);
171}
172
173static void xmit(int32_t un)
174{
175 int32_t i = state[un].buf_tl;
176 ver2("ser xmit %d %d", i, state[un].buf_hd);
177
178 if (i >= state[un].buf_hd) {
179 return;
180 }
181
182 uint8_t byte = state[un].buf[i % BUF_SZ];
183 ver2("ser xmit 0x%02x", byte);
184
185 state[un].rdr = byte;
186 state[un].rdr_ok = true;
187 state[un].irq_r = true;
188
189 state[un].buf_tl = i + 1;
190
191 if (state[un].buf_tl >= BUF_SZ) {
192 state[un].buf_hd -= BUF_SZ;
193 state[un].buf_tl -= BUF_SZ;
194 ver2("ser adj %d %d", state[un].buf_tl, state[un].buf_hd);
195 }
196}
197
198static void out_lk(int32_t un, uint8_t c)
199{
200 int32_t i = state[un].buf_hd;
201 ver2("ser out %d %d 0x%02x", state[un].buf_tl, i, c);
202
203 if (i >= state[un].buf_tl + BUF_SZ) {
204 err("serial port %d losing data", un);
205 return;
206 }
207
208 state[un].buf[i % BUF_SZ] = c;
209 state[un].buf_hd = i + 1;
210
211 if (!state[un].irq_r && !state[un].rdr_ok) {
212 xmit(un);
213 }
214}
215
216static void out(int32_t un, uint8_t c)
217{
218 if (SDL_LockMutex(cpu_mutex) < 0) {
219 fail("SDL_LockMutex() failed: %s", SDL_GetError());
220 }
221
222 out_lk(un, c);
223
224 if (SDL_UnlockMutex(cpu_mutex) < 0) {
225 fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
226 }
227}
228
229static void mouse(uint8_t c)
230{
231 if (c == 't') {
232 ver2("ser mou init");
233 }
234
235 out_lk(0, 'V');
236 out_lk(0, 'O');
237}
238
239void ser_sdl(void)
240{
241 ver3("ser_sdl()");
242
243 static int32_t last = 0;
244 int32_t now = SDL_AtomicGet(&frame);
245
246 if (last == now) {
247 ver3("no update");
248 return;
249 }
250
251 last = now;
252
253 if (SDL_FillRect(sur, NULL, bel == 0 ? CON_BGR : CON_BEL) < 0) {
254 fail("SDL_FillRect() failed: %s", SDL_GetError());
255 }
256
257 if (SDL_FillRect(sur, &(SDL_Rect){
258 .x = cur_x * fon_w,
259 .y = cur_y * fon_h,
260 .w = fon_w,
261 .h = fon_h
262 }, CON_CUR) < 0) {
263 fail("SDL_FillRect() failed: %s", SDL_GetError());
264 }
265
266 for (int32_t y = 0; y < CON_H; ++y) {
267 char line[CON_W + 1];
268 line[CON_W] = 0;
269
270 if (SDL_LockMutex(cpu_mutex) < 0) {
271 fail("SDL_LockMutex() failed: %s", SDL_GetError());
272 }
273
274 memcpy(line, mem[y], CON_W);
275
276 if (SDL_UnlockMutex(cpu_mutex) < 0) {
277 fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
278 }
279
280 SDL_Surface *lin = TTF_RenderText_Blended(fon, line, CON_FGR);
281
282 if (lin == NULL) {
283 fail("TTF_RenderText_Blended() failed: %s", TTF_GetError());
284 }
285
286 if (SDL_BlitSurface(lin, NULL, sur, &(SDL_Rect){
287 .x = 0,
288 .y = y * fon_h,
289 .w = CON_W * fon_w,
290 .h = fon_h
291 })) {
292 fail("SDL_BlitSurface() failed: %s", SDL_GetError());
293 }
294
295 SDL_FreeSurface(lin);
296 }
297
298 SDL_Texture *tex = SDL_CreateTextureFromSurface(ren, sur);
299
300 if (tex == NULL) {
301 fail("SDL_CreateTextureFromSurface() failed: %s", SDL_GetError());
302 }
303
304 if (SDL_RenderCopy(ren, tex, NULL, NULL) < 0) {
305 fail("SDL_RenderCopy() failed: %s", SDL_GetError());
306 }
307
308 SDL_DestroyTexture(tex);
309 SDL_RenderPresent(ren);
310}
311
312void ser_key(SDL_KeyboardEvent *ev)
313{
314 switch (ev->keysym.sym) {
315 case SDLK_BACKSPACE:
316 out(1, '\b');
317 break;
318
319 case SDLK_RETURN:
320 out(1, '\r');
321 break;
322
323 default:
324 if ((ev->keysym.mod & KMOD_CTRL) != 0 &&
325 ev->keysym.sym >= SDLK_a && ev->keysym.sym <= SDLK_z) {
326 out(1, (uint8_t)(ev->keysym.sym - SDLK_a + 1));
327 }
328
329 break;
330 }
331}
332
333void ser_text(SDL_TextInputEvent *ev)
334{
335 for (int32_t i = 0; ev->text[i] != 0; ++i) {
336 out(1, (uint8_t)ev->text[i]);
337 }
338}
339
340static void mou_ev(void)
341{
342 ver2("ser mou ev (%d, %d) %c %c",
343 mou_dx, mou_dy, mou_l ? 'l' : '-', mou_r ? 'r' : '-');
344
345 int32_t dx = mou_dx / MOU_DIV;
346 int32_t dy = mou_dy / MOU_DIV;
347
348 if (dx < -128) {
349 dx = -128;
350 }
351 else if (dx > 127) {
352 dx = 127;
353 }
354
355 if (dy < -128) {
356 dy = -128;
357 }
358 else if (dy > 127) {
359 dy = 127;
360 }
361
362 dx = dx & 0xff;
363 dy = dy & 0xff;
364
365 int32_t b1 = 0x40;
366
367 if (mou_l) {
368 b1 |= 0x20;
369 }
370
371 if (mou_r) {
372 b1 |= 0x10;
373 }
374
375 b1 |= (dy & 0xc0) >> 4;
376 b1 |= (dx & 0xc0) >> 6;
377
378 int32_t b2 = dx & 0x3f;
379 int32_t b3 = dy & 0x3f;
380
381 out_lk(0, (uint8_t)b1);
382 out_lk(0, (uint8_t)b2);
383 out_lk(0, (uint8_t)b3);
384
385 mou_dx = mou_dy = 0;
386}
387
388static void mou_ev_chk(void)
389{
390 if (--mou > 0) {
391 return;
392 }
393
394 mou = MOU_CYC;
395
396 if (mou_dx == 0 && mou_dy == 0) {
397 return;
398 }
399
400 mou_ev();
401}
402
403void ser_mou_res(void)
404{
405 if (SDL_LockMutex(cpu_mutex) < 0) {
406 fail("SDL_LockMutex() failed: %s", SDL_GetError());
407 }
408
409 mou = MOU_CYC;
410 mou_dx = mou_dy = 0;
411 mou_l = mou_r = false;
412
413 if (SDL_UnlockMutex(cpu_mutex) < 0) {
414 fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
415 }
416}
417
418void ser_mou_mov(SDL_MouseMotionEvent *ev)
419{
420 if (SDL_LockMutex(cpu_mutex) < 0) {
421 fail("SDL_LockMutex() failed: %s", SDL_GetError());
422 }
423
424 mou_dx += ev->xrel;
425 mou_dy += ev->yrel;
426
427 if (SDL_UnlockMutex(cpu_mutex) < 0) {
428 fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
429 }
430}
431
432void ser_mou_dn(SDL_MouseButtonEvent *ev)
433{
434 if (SDL_LockMutex(cpu_mutex) < 0) {
435 fail("SDL_LockMutex() failed: %s", SDL_GetError());
436 }
437
438 if (ev->button == SDL_BUTTON_LEFT) {
439 mou_l = true;
440 }
441 else if (ev->button == SDL_BUTTON_RIGHT) {
442 mou_r = true;
443 }
444 else {
445 return;
446 }
447
448 mou_ev();
449
450 if (SDL_UnlockMutex(cpu_mutex) < 0) {
451 fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
452 }
453}
454
455void ser_mou_up(SDL_MouseButtonEvent *ev)
456{
457 if (SDL_LockMutex(cpu_mutex) < 0) {
458 fail("SDL_LockMutex() failed: %s", SDL_GetError());
459 }
460
461 if (ev->button == SDL_BUTTON_LEFT) {
462 mou_l = false;
463 }
464 else if (ev->button == SDL_BUTTON_RIGHT) {
465 mou_r = false;
466 }
467 else {
468 return;
469 }
470
471 mou_ev();
472
473 if (SDL_UnlockMutex(cpu_mutex) < 0) {
474 fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
475 }
476}
477
478void ser_init(void)
479{
480 ver("ser init");
481
482 win = SDL_CreateWindow("Serial Console", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
483 WIN_W, WIN_H, 0);
484
485 if (win == NULL) {
486 fail("SDL_CreateWindow() failed: %s", SDL_GetError());
487 }
488
489 ser_win = SDL_GetWindowID(win);
490
491 if (ser_win == 0) {
492 fail("SDL_GetWindowID() failed: %s", SDL_GetError());
493 }
494
495 ren = SDL_CreateRenderer(win, -1, 0);
496
497 if (ren == NULL) {
498 fail("SDL_CreateRenderer() failed: %s", SDL_GetError());
499 }
500
501 SDL_AtomicSet(&frame, 1);
502
503 SDL_RWops *ops = SDL_RWFromFile(font, "rb");
504
505 if (ops == NULL) {
506 fail("error while opening font file %s: %s", font, SDL_GetError());
507 }
508
509 fon = TTF_OpenFontRW(ops, 1, 32);
510
511 if (fon == NULL) {
512 fail("error while loading font file %s: %s", font, TTF_GetError());
513 }
514
515 fon_h = TTF_FontLineSkip(fon);
516
517 if (TTF_GlyphMetrics(fon, 'X', NULL, NULL, NULL, NULL, &fon_w) < 0) {
518 fail("error while measuring font width: %s", TTF_GetError());
519 }
520
521 sur_w = CON_W * fon_w;
522 sur_h = CON_H * fon_h;
523
524 sur = SDL_CreateRGBSurface(0, sur_w, sur_h, 32, 0, 0, 0, 0);
525
526 if (sur == NULL) {
527 fail("SDL_CreateRGBSurface() failed: %s", SDL_GetError());
528 }
529
530 for (int32_t y = 0; y < CON_H; ++y) {
531 for (int32_t x = 0; x < CON_W; ++x) {
532 mem[y][x] = ' ';
533 }
534 }
535}
536
537void ser_quit(void)
538{
539 ver("ser quit");
540
541 SDL_FreeSurface(sur);
542 TTF_CloseFont(fon);
543
544 SDL_DestroyRenderer(ren);
545 SDL_DestroyWindow(win);
546}
547
548bool ser_exec(void)
549{
550 ver3("ser exec");
551
552 if (bel > 0) {
553 --bel;
554
555 if (bel == BEL_CYC - 1 || bel == 0) {
556 SDL_AtomicAdd(&frame, 1);
557 }
558 }
559
560 mou_ev_chk();
561
562 return state[0].irq_r || state[0].irq_t || state[1].irq_r || state[1].irq_t;
563}
564
565uint32_t ser_read(uint32_t off, int32_t sz)
566{
567 ver2("ser rd %u:%d", off, sz * 8);
568
569 if (sz != 1 || off > 7) {
570 fail("invalid ser rd %u:%d", off, sz * 8);
571 }
572
573 int32_t rg = (int32_t)(off % 4);
574 int32_t un = (int32_t)(off / 4);
575
576 uint32_t rv;
577
578 switch (rg) {
579 case REG_IER_ISR:
580 rv = (uint32_t)(0xc0 | (state[un].rdr_ok ? 0x01 : 0x00));
581 state[un].irq_r = false;
582 state[un].irq_t = false;
583 ver2("ISR[%d] 0x%02x", un, rv);
584 break;
585
586 case REG_TDR_RDR:
587 rv = state[un].rdr;
588 state[un].rdr_ok = false;
589 ver2("RDR[%d] 0x%02x", un, rv);
590 break;
591
592 default:
593 rv = 0x00;
594 break;
595 }
596
597 if (!state[un].irq_r && !state[un].rdr_ok) {
598 xmit(un);
599 }
600
601 return rv;
602}
603
604void ser_write(uint32_t off, int32_t sz, uint32_t val)
605{
606 ver2("ser wr %u:%d 0x%0*x", off, sz * 8, sz * 2, val);
607
608 if (sz != 1 || off > 7) {
609 fail("invalid ser wr %u:%d", off, sz * 8);
610 }
611
612 int32_t rg = (int32_t)(off % 4);
613 int32_t un = (int32_t)(off / 4);
614
615 switch (rg) {
616 case REG_TDR_RDR:
617 ver2("TDR[%d] 0x%02x", un, val);
618
619 if (un == 1) {
620 echo((uint8_t)val);
621 }
622 else {
623 mouse((uint8_t)val);
624 }
625
626 state[un].irq_t = true;
627 break;
628
629 default:
630 break;
631 }
632}
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