1 | /*===============================================================*\ |
---|
2 | | Project: display driver for HCMS29xx | |
---|
3 | +-----------------------------------------------------------------+ |
---|
4 | | File: disp_hcms29xx.c | |
---|
5 | +-----------------------------------------------------------------+ |
---|
6 | | Copyright (c) 2008 | |
---|
7 | | Embedded Brains GmbH | |
---|
8 | | Obere Lagerstr. 30 | |
---|
9 | | D-82178 Puchheim | |
---|
10 | | Germany | |
---|
11 | | rtems@embedded-brains.de | |
---|
12 | +-----------------------------------------------------------------+ |
---|
13 | | The license and distribution terms for this file may be | |
---|
14 | | found in the file LICENSE in this distribution or at | |
---|
15 | | http://www.rtems.org/license/LICENSE. | |
---|
16 | +-----------------------------------------------------------------+ |
---|
17 | | this file contains the SPI based driver for a HCMS29xx 4 digit | |
---|
18 | | alphanumeric LED display | |
---|
19 | \*===============================================================*/ |
---|
20 | |
---|
21 | #include <string.h> |
---|
22 | #include <stdlib.h> |
---|
23 | |
---|
24 | #include <rtems.h> |
---|
25 | #include <rtems/libio.h> |
---|
26 | #include <bsp.h> |
---|
27 | #include <rtems/libi2c.h> |
---|
28 | #include <libchip/disp_hcms29xx.h> |
---|
29 | #include "font_hcms29xx.h" |
---|
30 | #define FONT_BASE font_hcms29xx_base |
---|
31 | |
---|
32 | |
---|
33 | #define DISP_HCMS29XX_DIGIT_CNT (4) |
---|
34 | #define DISP_HCMS29XX_SEMA_NAME rtems_build_name('D','4','I','Q') |
---|
35 | #define DISP_HCMS29XX_TRNS_SEMA_NAME rtems_build_name('D','4','T','R') |
---|
36 | #define DISP_HCMS29XX_TIMER_NAME rtems_build_name('D','4','T','M') |
---|
37 | #define DISP_HCMS29XX_TASK_NAME rtems_build_name('D','4','T','A') |
---|
38 | |
---|
39 | #define DISP_HCMS29XX_EVENT_TIMER RTEMS_EVENT_1 |
---|
40 | #define DISP_HCMS29XX_EVENT_NEWSTR RTEMS_EVENT_2 |
---|
41 | |
---|
42 | |
---|
43 | static disp_font_t disp_hcms29xx_font_normal; |
---|
44 | static disp_font_t disp_hcms29xx_font_rotate; |
---|
45 | const rtems_libi2c_tfr_mode_t spi_disphcms29xx_tfr_mode = { |
---|
46 | .baudrate = 1000000, |
---|
47 | .bits_per_char = 8, |
---|
48 | .lsb_first = true, |
---|
49 | .clock_inv = true, |
---|
50 | .clock_phs = true, |
---|
51 | .idle_char = 0 |
---|
52 | }; |
---|
53 | |
---|
54 | static disp_hcms29xx_drv_t disp_hcms29xx_drv_tbl; |
---|
55 | |
---|
56 | /*========================================= |
---|
57 | * font management functions |
---|
58 | */ |
---|
59 | |
---|
60 | /*=========================================================================*\ |
---|
61 | | Function: | |
---|
62 | \*-------------------------------------------------------------------------*/ |
---|
63 | static rtems_status_code disp_hcms29xx_font_struct_size |
---|
64 | ( |
---|
65 | /*-------------------------------------------------------------------------*\ |
---|
66 | | Purpose: | |
---|
67 | | compute size of font data structure tree | |
---|
68 | +---------------------------------------------------------------------------+ |
---|
69 | | Input Parameters: | |
---|
70 | \*-------------------------------------------------------------------------*/ |
---|
71 | disp_font_t src, /* source font */ |
---|
72 | size_t *dst_size /* destination: size of font struct*/ |
---|
73 | ) |
---|
74 | /*-------------------------------------------------------------------------*\ |
---|
75 | | Return Value: | |
---|
76 | | rtems_status_code | |
---|
77 | \*=========================================================================*/ |
---|
78 | { |
---|
79 | |
---|
80 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
81 | size_t font_size = 0; |
---|
82 | size_t glyph_idx; |
---|
83 | /* |
---|
84 | * check parameters |
---|
85 | */ |
---|
86 | if ((rc == RTEMS_SUCCESSFUL) && |
---|
87 | (src == NULL)) { |
---|
88 | rc = RTEMS_INVALID_ADDRESS; |
---|
89 | } |
---|
90 | if (rc == RTEMS_SUCCESSFUL) { |
---|
91 | font_size = |
---|
92 | sizeof(*src); /* font_base structure */ |
---|
93 | } |
---|
94 | glyph_idx = 0; |
---|
95 | while ((rc == RTEMS_SUCCESSFUL) && |
---|
96 | (glyph_idx < (sizeof(src->latin1)/sizeof(src->latin1[0])))) { |
---|
97 | if (src->latin1[glyph_idx] != NULL) { |
---|
98 | font_size += sizeof(*(src->latin1[glyph_idx])) |
---|
99 | + (size_t) src->latin1[glyph_idx]->bb.w; |
---|
100 | } |
---|
101 | glyph_idx++; |
---|
102 | } |
---|
103 | *dst_size = font_size; |
---|
104 | |
---|
105 | return rc; |
---|
106 | } |
---|
107 | |
---|
108 | /*=========================================================================*\ |
---|
109 | | Function: | |
---|
110 | \*-------------------------------------------------------------------------*/ |
---|
111 | static inline unsigned char disp_hcms29xx_bitswap |
---|
112 | ( |
---|
113 | /*-------------------------------------------------------------------------*\ |
---|
114 | | Purpose: | |
---|
115 | | swap data bits in byte (7<->0 , 6<->1 etc) | |
---|
116 | +---------------------------------------------------------------------------+ |
---|
117 | | Input Parameters: | |
---|
118 | \*-------------------------------------------------------------------------*/ |
---|
119 | unsigned char byte |
---|
120 | ) |
---|
121 | /*-------------------------------------------------------------------------*\ |
---|
122 | | Return Value: | |
---|
123 | | rtems_status_code | |
---|
124 | \*=========================================================================*/ |
---|
125 | { |
---|
126 | unsigned char result = 0; |
---|
127 | int smsk,dmsk; |
---|
128 | for (smsk = 0x01,dmsk=0x80; |
---|
129 | smsk < 0x100; |
---|
130 | smsk<<=1 ,dmsk>>=1) { |
---|
131 | if ((byte & smsk) != 0) { |
---|
132 | result |= (unsigned char) dmsk; |
---|
133 | } |
---|
134 | } |
---|
135 | return result; |
---|
136 | } |
---|
137 | |
---|
138 | /*=========================================================================*\ |
---|
139 | | Function: | |
---|
140 | \*-------------------------------------------------------------------------*/ |
---|
141 | static rtems_status_code disp_hcms29xx_copy_font |
---|
142 | ( |
---|
143 | /*-------------------------------------------------------------------------*\ |
---|
144 | | Purpose: | |
---|
145 | | copy font data from source to dest font structure | |
---|
146 | +---------------------------------------------------------------------------+ |
---|
147 | | Input Parameters: | |
---|
148 | \*-------------------------------------------------------------------------*/ |
---|
149 | disp_font_t src, /* source font */ |
---|
150 | struct disp_font_base *dst, /* ptr to destination font */ |
---|
151 | int shift_cnt, /* shift count for font */ |
---|
152 | bool do_rotate /* rotate font, if true */ |
---|
153 | ) |
---|
154 | /*-------------------------------------------------------------------------*\ |
---|
155 | | Return Value: | |
---|
156 | | rtems_status_code | |
---|
157 | \*=========================================================================*/ |
---|
158 | { |
---|
159 | |
---|
160 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
161 | char *alloc_next = (char *)dst; |
---|
162 | size_t glyph_idx = 0; |
---|
163 | int glyph_size; |
---|
164 | unsigned char byte; |
---|
165 | int bcnt; |
---|
166 | |
---|
167 | /* |
---|
168 | * check parameters |
---|
169 | */ |
---|
170 | if ((rc == RTEMS_SUCCESSFUL) && |
---|
171 | ((src == NULL) || |
---|
172 | (dst == NULL))) { |
---|
173 | rc = RTEMS_INVALID_ADDRESS; |
---|
174 | } |
---|
175 | /* |
---|
176 | * copy font_base structure |
---|
177 | */ |
---|
178 | if (rc == RTEMS_SUCCESSFUL) { |
---|
179 | *dst = *src; |
---|
180 | alloc_next += sizeof(*dst); |
---|
181 | } |
---|
182 | /* |
---|
183 | * for all glyphs: assign own glyph memory |
---|
184 | */ |
---|
185 | glyph_idx = 0; |
---|
186 | while ((rc == RTEMS_SUCCESSFUL) && |
---|
187 | glyph_idx < (sizeof(src->latin1)/sizeof(src->latin1[0]))) { |
---|
188 | if (src->latin1[glyph_idx] != NULL) { |
---|
189 | /* |
---|
190 | * allocate space for glyph |
---|
191 | */ |
---|
192 | dst->latin1[glyph_idx] = (struct disp_font_glyph *)alloc_next; |
---|
193 | alloc_next += sizeof(*(dst->latin1[glyph_idx])); |
---|
194 | /* |
---|
195 | * copy source values. |
---|
196 | * Note: bitmap will be reassigned later |
---|
197 | */ |
---|
198 | *(struct disp_font_glyph *)(dst->latin1[glyph_idx]) = |
---|
199 | *(src->latin1[glyph_idx]); |
---|
200 | } |
---|
201 | else { |
---|
202 | dst->latin1[glyph_idx] = NULL; |
---|
203 | } |
---|
204 | glyph_idx++; |
---|
205 | } |
---|
206 | |
---|
207 | /* |
---|
208 | * for all glyphs: reassign bitmap |
---|
209 | */ |
---|
210 | glyph_idx = 0; |
---|
211 | while ((rc == RTEMS_SUCCESSFUL) && |
---|
212 | glyph_idx < (sizeof(src->latin1)/sizeof(src->latin1[0]))) { |
---|
213 | if (src->latin1[glyph_idx] != NULL) { |
---|
214 | glyph_size = src->latin1[glyph_idx]->bb.w; |
---|
215 | /* |
---|
216 | * allocate space for glyph_bitmap |
---|
217 | */ |
---|
218 | dst->latin1[glyph_idx]->bitmap = (const unsigned char *) alloc_next; |
---|
219 | alloc_next += glyph_size; |
---|
220 | /* |
---|
221 | * copy/transform bitmap |
---|
222 | */ |
---|
223 | for (bcnt = 0;bcnt < glyph_size;bcnt++) { |
---|
224 | if (do_rotate) { |
---|
225 | byte = src->latin1[glyph_idx]->bitmap[glyph_size - 1 - bcnt]; |
---|
226 | byte = disp_hcms29xx_bitswap(byte); |
---|
227 | } |
---|
228 | else { |
---|
229 | byte = src->latin1[glyph_idx]->bitmap[bcnt]; |
---|
230 | } |
---|
231 | if (shift_cnt < 0) { |
---|
232 | byte = byte >> shift_cnt; |
---|
233 | } |
---|
234 | else if (shift_cnt > 0) { |
---|
235 | byte = byte >> shift_cnt; |
---|
236 | } |
---|
237 | ((unsigned char *)(dst->latin1[glyph_idx]->bitmap))[bcnt] = byte; |
---|
238 | } |
---|
239 | } |
---|
240 | glyph_idx++; |
---|
241 | } |
---|
242 | return rc; |
---|
243 | } |
---|
244 | |
---|
245 | /*=========================================================================*\ |
---|
246 | | Function: | |
---|
247 | \*-------------------------------------------------------------------------*/ |
---|
248 | static rtems_status_code disp_hcms29xx_alloc_copy_font |
---|
249 | ( |
---|
250 | /*-------------------------------------------------------------------------*\ |
---|
251 | | Purpose: | |
---|
252 | | copy font data from source to dest font structure, alloc all data | |
---|
253 | +---------------------------------------------------------------------------+ |
---|
254 | | Input Parameters: | |
---|
255 | \*-------------------------------------------------------------------------*/ |
---|
256 | const disp_font_t src, /* source font */ |
---|
257 | disp_font_t *dst, /* ptr to destination font */ |
---|
258 | int shift_cnt, /* shift count for font */ |
---|
259 | bool do_rotate /* rotate font, if true */ |
---|
260 | ) |
---|
261 | /*-------------------------------------------------------------------------*\ |
---|
262 | | Return Value: | |
---|
263 | | rtems_status_code | |
---|
264 | \*=========================================================================*/ |
---|
265 | { |
---|
266 | |
---|
267 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
268 | size_t src_size = 0; |
---|
269 | /* |
---|
270 | * check parameters |
---|
271 | */ |
---|
272 | if ((rc == RTEMS_SUCCESSFUL) && |
---|
273 | ((src == NULL) |
---|
274 | || (dst == NULL))) { |
---|
275 | rc = RTEMS_INVALID_ADDRESS; |
---|
276 | } |
---|
277 | /* |
---|
278 | * determine size of source data |
---|
279 | */ |
---|
280 | if (rc == RTEMS_SUCCESSFUL) { |
---|
281 | rc = disp_hcms29xx_font_struct_size(src,&src_size); |
---|
282 | } |
---|
283 | /* |
---|
284 | * allocate proper data area |
---|
285 | */ |
---|
286 | if (rc == RTEMS_SUCCESSFUL) { |
---|
287 | *dst = malloc(src_size); |
---|
288 | if (*dst == NULL) { |
---|
289 | rc = RTEMS_UNSATISFIED; |
---|
290 | } |
---|
291 | } |
---|
292 | /* |
---|
293 | * scan through source data, copy to dest |
---|
294 | */ |
---|
295 | if (rc == RTEMS_SUCCESSFUL) { |
---|
296 | rc = disp_hcms29xx_copy_font(src,*dst,shift_cnt,do_rotate); |
---|
297 | } |
---|
298 | return rc; |
---|
299 | } |
---|
300 | |
---|
301 | /*========================================= |
---|
302 | * SPI communication functions |
---|
303 | */ |
---|
304 | |
---|
305 | /*=========================================================================*\ |
---|
306 | | Function: | |
---|
307 | \*-------------------------------------------------------------------------*/ |
---|
308 | static rtems_status_code disp_hcms29xx_send_to_display |
---|
309 | ( |
---|
310 | /*-------------------------------------------------------------------------*\ |
---|
311 | | Purpose: | |
---|
312 | | request access semaphore to SPI, prepare buffer descriptors, start | |
---|
313 | | transfer via SPI to display | |
---|
314 | +---------------------------------------------------------------------------+ |
---|
315 | | Input Parameters: | |
---|
316 | \*-------------------------------------------------------------------------*/ |
---|
317 | disp_hcms29xx_drv_t *softc_ptr, |
---|
318 | const volatile char *disp_buffer /* start of chars to display (4 chars or 'til \0)*/ |
---|
319 | ) |
---|
320 | /*-------------------------------------------------------------------------*\ |
---|
321 | | Return Value: | |
---|
322 | | rtems_status_code | |
---|
323 | \*=========================================================================*/ |
---|
324 | { |
---|
325 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
326 | bool char_avail; |
---|
327 | const struct disp_font_glyph *glyph_ptr; |
---|
328 | disp_font_t curr_font; |
---|
329 | int i, ret_cnt; |
---|
330 | unsigned char c; |
---|
331 | |
---|
332 | /* |
---|
333 | * select device, set transfer mode, address device |
---|
334 | */ |
---|
335 | if (rc == RTEMS_SUCCESSFUL) { |
---|
336 | rc = rtems_libi2c_send_start(softc_ptr->disp_param.minor); |
---|
337 | } |
---|
338 | /* |
---|
339 | * set transfer mode |
---|
340 | */ |
---|
341 | if (rc == RTEMS_SUCCESSFUL) { |
---|
342 | rc = -rtems_libi2c_ioctl(softc_ptr->disp_param.minor, |
---|
343 | RTEMS_LIBI2C_IOCTL_SET_TFRMODE, |
---|
344 | &spi_disphcms29xx_tfr_mode); |
---|
345 | } |
---|
346 | |
---|
347 | /* |
---|
348 | * address device |
---|
349 | */ |
---|
350 | if (rc == RTEMS_SUCCESSFUL) { |
---|
351 | rc = rtems_libi2c_send_addr(softc_ptr->disp_param.minor,true); |
---|
352 | } |
---|
353 | |
---|
354 | /* |
---|
355 | * send data |
---|
356 | */ |
---|
357 | if (rc == RTEMS_SUCCESSFUL) { |
---|
358 | curr_font = |
---|
359 | softc_ptr->disp_param.rotate |
---|
360 | ? disp_hcms29xx_font_rotate |
---|
361 | : disp_hcms29xx_font_normal; |
---|
362 | |
---|
363 | char_avail = true; |
---|
364 | /* |
---|
365 | * FIXME: for rotated display, write last character first... |
---|
366 | * maybe we should copy everything to a common buffer and use |
---|
367 | * ONE SPI transfer? |
---|
368 | */ |
---|
369 | for (i = 0; |
---|
370 | ((rc == RTEMS_SUCCESSFUL) && |
---|
371 | (i < DISP_HCMS29XX_DIGIT_CNT)); |
---|
372 | i++) { |
---|
373 | /* test for end of string... */ |
---|
374 | c = disp_buffer[i]; /* perform consistent read of disp_buffer */ |
---|
375 | if (char_avail && (c == '\0')) { |
---|
376 | char_avail = false; |
---|
377 | } |
---|
378 | glyph_ptr = (char_avail |
---|
379 | ? curr_font->latin1[c] |
---|
380 | : NULL); |
---|
381 | if (glyph_ptr == NULL) { |
---|
382 | glyph_ptr = curr_font->latin1[' ']; |
---|
383 | } |
---|
384 | |
---|
385 | /* |
---|
386 | * send 5 bytes from (char *)glyph_ptr->bitmap to SPI |
---|
387 | */ |
---|
388 | if (rc == RTEMS_SUCCESSFUL) { |
---|
389 | ret_cnt = rtems_libi2c_write_bytes(softc_ptr->disp_param.minor, |
---|
390 | glyph_ptr->bitmap,5); |
---|
391 | if (ret_cnt < 0) { |
---|
392 | rc = -ret_cnt; |
---|
393 | } |
---|
394 | } |
---|
395 | } |
---|
396 | } |
---|
397 | /* |
---|
398 | * finish transfer |
---|
399 | */ |
---|
400 | if (rc == RTEMS_SUCCESSFUL) { |
---|
401 | rc = rtems_libi2c_send_stop(softc_ptr->disp_param.minor); |
---|
402 | } |
---|
403 | |
---|
404 | return rc; |
---|
405 | } |
---|
406 | |
---|
407 | /*=========================================================================*\ |
---|
408 | | Function: | |
---|
409 | \*-------------------------------------------------------------------------*/ |
---|
410 | static rtems_status_code disp_hcms29xx_send_to_control |
---|
411 | ( |
---|
412 | /*-------------------------------------------------------------------------*\ |
---|
413 | | Purpose: | |
---|
414 | | request access semaphore to SPI, prepare buffer descriptors, start | |
---|
415 | | transfer via SPI to display | |
---|
416 | +---------------------------------------------------------------------------+ |
---|
417 | | Input Parameters: | |
---|
418 | \*-------------------------------------------------------------------------*/ |
---|
419 | disp_hcms29xx_drv_t *softc_ptr, |
---|
420 | int pwm, /* value for pwm of LEDs, 0..15 */ |
---|
421 | int peak, /* value for peak current for LEDs, 0..3 */ |
---|
422 | int sleep, /* value to make display "sleep" (0..1 */ |
---|
423 | int div, /* divider for external osc input, unused here */ |
---|
424 | int chain /* mode to drive other displays, unused here */ |
---|
425 | ) |
---|
426 | /*-------------------------------------------------------------------------*\ |
---|
427 | | Return Value: | |
---|
428 | | rtems_status_code | |
---|
429 | \*=========================================================================*/ |
---|
430 | { |
---|
431 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
432 | int run, ret_cnt; |
---|
433 | uint8_t ctrl_buffer; |
---|
434 | |
---|
435 | /* two accesses, control word 0 and 1 */ |
---|
436 | for (run = 0; |
---|
437 | ((rc == RTEMS_SUCCESSFUL) && (run <= 1)); |
---|
438 | run++) { |
---|
439 | if (rc == RTEMS_SUCCESSFUL) { |
---|
440 | if (run == 0) { |
---|
441 | ctrl_buffer = |
---|
442 | (0 << 7) | |
---|
443 | ((sleep & 0x01) << 6) | |
---|
444 | ((peak & 0x03) << 4) | |
---|
445 | ((pwm & 0x0f) << 0); |
---|
446 | } |
---|
447 | else { |
---|
448 | ctrl_buffer = |
---|
449 | (1 << 7) | |
---|
450 | ((div & 0x01) << 1) | |
---|
451 | ((chain & 0x01) << 0); |
---|
452 | } |
---|
453 | /* |
---|
454 | * select device, set transfer mode, address device |
---|
455 | */ |
---|
456 | if (rc == RTEMS_SUCCESSFUL) { |
---|
457 | rc = rtems_libi2c_send_start(softc_ptr->disp_param.minor); |
---|
458 | } |
---|
459 | /* |
---|
460 | * set transfer mode |
---|
461 | */ |
---|
462 | if (rc == RTEMS_SUCCESSFUL) { |
---|
463 | rc = -rtems_libi2c_ioctl(softc_ptr->disp_param.minor, |
---|
464 | RTEMS_LIBI2C_IOCTL_SET_TFRMODE, |
---|
465 | &spi_disphcms29xx_tfr_mode); |
---|
466 | } |
---|
467 | |
---|
468 | /* |
---|
469 | * address device |
---|
470 | */ |
---|
471 | if (rc == RTEMS_SUCCESSFUL) { |
---|
472 | rc = rtems_libi2c_send_addr(softc_ptr->disp_param.minor,true); |
---|
473 | } |
---|
474 | |
---|
475 | /* |
---|
476 | * send 1 byte from ctrl_buffer |
---|
477 | */ |
---|
478 | if (rc == RTEMS_SUCCESSFUL) { |
---|
479 | ret_cnt = rtems_libi2c_write_bytes(softc_ptr->disp_param.minor, |
---|
480 | &ctrl_buffer,1); |
---|
481 | if (ret_cnt < 0) { |
---|
482 | rc = -ret_cnt; |
---|
483 | } |
---|
484 | } |
---|
485 | } |
---|
486 | } /* next run ... */ |
---|
487 | |
---|
488 | /* |
---|
489 | * finish transfer |
---|
490 | */ |
---|
491 | if (rc == RTEMS_SUCCESSFUL) { |
---|
492 | rc = rtems_libi2c_send_stop(softc_ptr->disp_param.minor); |
---|
493 | } |
---|
494 | |
---|
495 | return rc; |
---|
496 | } |
---|
497 | |
---|
498 | /*=========================================================================*\ |
---|
499 | | Function: | |
---|
500 | \*-------------------------------------------------------------------------*/ |
---|
501 | static rtems_timer_service_routine disp_hcms29xx_timer_sr |
---|
502 | /*-------------------------------------------------------------------------*\ |
---|
503 | | Purpose: | |
---|
504 | | this task updates the string in the display | |
---|
505 | +---------------------------------------------------------------------------+ |
---|
506 | | Input Parameters: | |
---|
507 | \*-------------------------------------------------------------------------*/ |
---|
508 | ( |
---|
509 | rtems_id id, /* ID of timer, not used */ |
---|
510 | void * arg /* calling arg: softc_ptr */ |
---|
511 | ) |
---|
512 | /*-------------------------------------------------------------------------*\ |
---|
513 | | Return Value: | |
---|
514 | | <none used> | |
---|
515 | \*=========================================================================*/ |
---|
516 | { |
---|
517 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
518 | disp_hcms29xx_drv_t *softc_ptr = arg; |
---|
519 | |
---|
520 | |
---|
521 | if (rc == RTEMS_SUCCESSFUL) { |
---|
522 | rc = rtems_event_send(softc_ptr->disp_param.task_id, |
---|
523 | DISP_HCMS29XX_EVENT_TIMER); |
---|
524 | } |
---|
525 | } |
---|
526 | |
---|
527 | /*=========================================================================*\ |
---|
528 | | Function: | |
---|
529 | \*-------------------------------------------------------------------------*/ |
---|
530 | static rtems_task disp_hcms29xx_update_task |
---|
531 | ( |
---|
532 | /*-------------------------------------------------------------------------*\ |
---|
533 | | Purpose: | |
---|
534 | | this task updates the string in the display | |
---|
535 | +---------------------------------------------------------------------------+ |
---|
536 | | Input Parameters: | |
---|
537 | \*-------------------------------------------------------------------------*/ |
---|
538 | rtems_task_argument argument |
---|
539 | ) |
---|
540 | /*-------------------------------------------------------------------------*\ |
---|
541 | | Return Value: | |
---|
542 | | <never exits> | |
---|
543 | \*=========================================================================*/ |
---|
544 | { |
---|
545 | rtems_event_set my_events; |
---|
546 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
547 | int disp_offset = 0; |
---|
548 | rtems_id disp_hcms29xx_timer_id; |
---|
549 | disp_hcms29xx_drv_t *softc_ptr = &disp_hcms29xx_drv_tbl; |
---|
550 | |
---|
551 | /* |
---|
552 | * initialize display: |
---|
553 | */ |
---|
554 | /* |
---|
555 | * set control attributes for display |
---|
556 | * maximum brightness... |
---|
557 | */ |
---|
558 | if (rc == RTEMS_SUCCESSFUL) { |
---|
559 | rc = disp_hcms29xx_send_to_control(softc_ptr, |
---|
560 | 14,3,1,0,0);/* pwm/peak/nosleep/div/chain */ |
---|
561 | } |
---|
562 | |
---|
563 | /* |
---|
564 | * set display to blank |
---|
565 | */ |
---|
566 | if (rc == RTEMS_SUCCESSFUL) { |
---|
567 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
568 | ""); |
---|
569 | } |
---|
570 | |
---|
571 | /* |
---|
572 | * create timer for scrolling |
---|
573 | */ |
---|
574 | if (rc == RTEMS_SUCCESSFUL) { |
---|
575 | rc = rtems_timer_create(DISP_HCMS29XX_TIMER_NAME, |
---|
576 | &disp_hcms29xx_timer_id); |
---|
577 | } |
---|
578 | |
---|
579 | while (rc == RTEMS_SUCCESSFUL) { |
---|
580 | /* |
---|
581 | * wait for any event |
---|
582 | */ |
---|
583 | rc = rtems_event_receive(DISP_HCMS29XX_EVENT_NEWSTR | |
---|
584 | DISP_HCMS29XX_EVENT_TIMER , |
---|
585 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
586 | RTEMS_NO_TIMEOUT, |
---|
587 | &my_events); |
---|
588 | if (my_events & DISP_HCMS29XX_EVENT_NEWSTR) { |
---|
589 | /* |
---|
590 | * fetch new string consistently into local buffer |
---|
591 | */ |
---|
592 | if (rc == RTEMS_SUCCESSFUL) { |
---|
593 | rc = rtems_semaphore_obtain(softc_ptr->disp_param.trns_sema_id, |
---|
594 | RTEMS_WAIT,RTEMS_NO_TIMEOUT); |
---|
595 | } |
---|
596 | if (rc == RTEMS_SUCCESSFUL) { |
---|
597 | strncpy(softc_ptr->disp_param.disp_buffer, |
---|
598 | softc_ptr->disp_param.trns_buffer, |
---|
599 | sizeof(softc_ptr->disp_param.disp_buffer)); |
---|
600 | softc_ptr->disp_param.disp_buffer[sizeof(softc_ptr->disp_param.disp_buffer)-1] = '\0'; |
---|
601 | softc_ptr->disp_param.disp_buf_cnt = |
---|
602 | (int) strlen(softc_ptr->disp_param.disp_buffer); |
---|
603 | } |
---|
604 | if (rc == RTEMS_SUCCESSFUL) { |
---|
605 | rc = rtems_semaphore_release(softc_ptr->disp_param.trns_sema_id); |
---|
606 | } |
---|
607 | /* |
---|
608 | * set initial offset to negative value |
---|
609 | * to make string static for some ticks |
---|
610 | */ |
---|
611 | disp_offset = -4; |
---|
612 | } |
---|
613 | if (my_events & DISP_HCMS29XX_EVENT_TIMER) { |
---|
614 | /* |
---|
615 | * increase disp_offset, if possible, otherwise reset it |
---|
616 | */ |
---|
617 | if ((disp_offset < 0) || |
---|
618 | (disp_offset < softc_ptr->disp_param.disp_buf_cnt- |
---|
619 | DISP_HCMS29XX_DIGIT_CNT/2)) { |
---|
620 | disp_offset++; |
---|
621 | } |
---|
622 | else { |
---|
623 | disp_offset = -4; |
---|
624 | } |
---|
625 | } |
---|
626 | /* |
---|
627 | * display string, starting from disp_offset |
---|
628 | */ |
---|
629 | if (disp_offset < 0) { |
---|
630 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
631 | softc_ptr->disp_param.disp_buffer); |
---|
632 | } |
---|
633 | else if (disp_offset |
---|
634 | < (softc_ptr->disp_param.disp_buf_cnt - DISP_HCMS29XX_DIGIT_CNT)) { |
---|
635 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
636 | softc_ptr->disp_param.disp_buffer+disp_offset); |
---|
637 | } |
---|
638 | else { |
---|
639 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
640 | softc_ptr->disp_param.disp_buffer |
---|
641 | + softc_ptr->disp_param.disp_buf_cnt |
---|
642 | - DISP_HCMS29XX_DIGIT_CNT); |
---|
643 | } |
---|
644 | /* |
---|
645 | * activate timer, if needed |
---|
646 | */ |
---|
647 | if (rc == RTEMS_SUCCESSFUL) { |
---|
648 | if (softc_ptr->disp_param.disp_buf_cnt > DISP_HCMS29XX_DIGIT_CNT) { |
---|
649 | rc = rtems_timer_fire_after(disp_hcms29xx_timer_id, |
---|
650 | 50, |
---|
651 | disp_hcms29xx_timer_sr, |
---|
652 | NULL); |
---|
653 | } |
---|
654 | else { |
---|
655 | rc = rtems_timer_cancel(disp_hcms29xx_timer_id); |
---|
656 | } |
---|
657 | } |
---|
658 | } |
---|
659 | /* |
---|
660 | * FIXME: display task is dead... |
---|
661 | */ |
---|
662 | } |
---|
663 | |
---|
664 | /*=========================================================================*\ |
---|
665 | | Function: | |
---|
666 | \*-------------------------------------------------------------------------*/ |
---|
667 | static rtems_status_code disp_hcms29xx_update |
---|
668 | ( |
---|
669 | /*-------------------------------------------------------------------------*\ |
---|
670 | | Purpose: | |
---|
671 | | move given string to display task | |
---|
672 | +---------------------------------------------------------------------------+ |
---|
673 | | Input Parameters: | |
---|
674 | \*-------------------------------------------------------------------------*/ |
---|
675 | disp_hcms29xx_drv_t *softc_ptr, |
---|
676 | const char *src |
---|
677 | ) |
---|
678 | /*-------------------------------------------------------------------------*\ |
---|
679 | | Return Value: | |
---|
680 | | rtems_status_code | |
---|
681 | \*=========================================================================*/ |
---|
682 | { |
---|
683 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
684 | |
---|
685 | /* |
---|
686 | * obtain trns semaphore |
---|
687 | */ |
---|
688 | if (rc == RTEMS_SUCCESSFUL) { |
---|
689 | rc = rtems_semaphore_obtain(softc_ptr->disp_param.trns_sema_id, |
---|
690 | RTEMS_WAIT,RTEMS_NO_TIMEOUT); |
---|
691 | } |
---|
692 | /* |
---|
693 | * copy string... |
---|
694 | */ |
---|
695 | strncpy(softc_ptr->disp_param.trns_buffer,src, |
---|
696 | sizeof(softc_ptr->disp_param.trns_buffer)); |
---|
697 | softc_ptr->disp_param.trns_buffer[sizeof(softc_ptr->disp_param.trns_buffer)-1] = '\0'; |
---|
698 | |
---|
699 | /* |
---|
700 | * release trns semaphore |
---|
701 | */ |
---|
702 | if (rc == RTEMS_SUCCESSFUL) { |
---|
703 | rc = rtems_semaphore_release(softc_ptr->disp_param.trns_sema_id); |
---|
704 | } |
---|
705 | |
---|
706 | /* |
---|
707 | * send event to task |
---|
708 | */ |
---|
709 | if (rc == RTEMS_SUCCESSFUL) { |
---|
710 | rc = rtems_event_send(softc_ptr->disp_param.task_id, |
---|
711 | DISP_HCMS29XX_EVENT_NEWSTR); |
---|
712 | } |
---|
713 | |
---|
714 | return rc; |
---|
715 | } |
---|
716 | |
---|
717 | /*=========================================================================*\ |
---|
718 | | Function: | |
---|
719 | \*-------------------------------------------------------------------------*/ |
---|
720 | rtems_device_driver disp_hcms29xx_dev_initialize |
---|
721 | ( |
---|
722 | /*-------------------------------------------------------------------------*\ |
---|
723 | | Purpose: | |
---|
724 | | prepare the display device driver to accept write calls | |
---|
725 | | register device with its name | |
---|
726 | +---------------------------------------------------------------------------+ |
---|
727 | | Input Parameters: | |
---|
728 | \*-------------------------------------------------------------------------*/ |
---|
729 | rtems_device_major_number major, |
---|
730 | rtems_device_minor_number minor, |
---|
731 | void *arg |
---|
732 | ) |
---|
733 | /*-------------------------------------------------------------------------*\ |
---|
734 | | Return Value: | |
---|
735 | | rtems_status_code | |
---|
736 | \*=========================================================================*/ |
---|
737 | /* |
---|
738 | * Initialize and register the device |
---|
739 | */ |
---|
740 | { |
---|
741 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
742 | disp_hcms29xx_drv_t *softc_ptr = &disp_hcms29xx_drv_tbl; |
---|
743 | |
---|
744 | /* |
---|
745 | * initialize font management |
---|
746 | * FIXME: check, that default glyph exists |
---|
747 | * FIXME: check font size to be 5x7 |
---|
748 | */ |
---|
749 | /* |
---|
750 | * translate font according to direction/baseline |
---|
751 | */ |
---|
752 | if (rc == RTEMS_SUCCESSFUL) { |
---|
753 | rc = disp_hcms29xx_alloc_copy_font( |
---|
754 | &FONT_BASE, |
---|
755 | &disp_hcms29xx_font_normal, |
---|
756 | FONT_BASE.descent, /* shift to visibility... */ |
---|
757 | FALSE); /* do not rotate */ |
---|
758 | } |
---|
759 | /* FIXME: translate font for rotation */ |
---|
760 | if (rc == RTEMS_SUCCESSFUL) { |
---|
761 | rc = disp_hcms29xx_alloc_copy_font(&FONT_BASE, |
---|
762 | &disp_hcms29xx_font_rotate, |
---|
763 | 0, /* do not shift */ |
---|
764 | true); /* rotate font */ |
---|
765 | } |
---|
766 | /* |
---|
767 | * create the trns_buffer semaphore |
---|
768 | */ |
---|
769 | if (rc == RTEMS_SUCCESSFUL) { |
---|
770 | rc = rtems_semaphore_create (DISP_HCMS29XX_TRNS_SEMA_NAME,1, |
---|
771 | RTEMS_PRIORITY |
---|
772 | |RTEMS_BINARY_SEMAPHORE |
---|
773 | |RTEMS_INHERIT_PRIORITY |
---|
774 | |RTEMS_NO_PRIORITY_CEILING |
---|
775 | |RTEMS_LOCAL, |
---|
776 | 0, |
---|
777 | &softc_ptr->disp_param.trns_sema_id); |
---|
778 | } |
---|
779 | |
---|
780 | /* |
---|
781 | * create and start display task |
---|
782 | */ |
---|
783 | if (rc == RTEMS_SUCCESSFUL) { |
---|
784 | rc = rtems_task_create(DISP_HCMS29XX_TASK_NAME, |
---|
785 | 20, |
---|
786 | RTEMS_MINIMUM_STACK_SIZE, |
---|
787 | RTEMS_INTERRUPT_LEVEL(0) | RTEMS_TIMESLICE, |
---|
788 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
789 | &softc_ptr->disp_param.task_id); |
---|
790 | } |
---|
791 | if (rc == RTEMS_SUCCESSFUL) { |
---|
792 | rc = rtems_task_start(softc_ptr->disp_param.task_id, |
---|
793 | disp_hcms29xx_update_task,0); |
---|
794 | } |
---|
795 | return rc; |
---|
796 | } |
---|
797 | |
---|
798 | /*=========================================================================*\ |
---|
799 | | Function: | |
---|
800 | \*-------------------------------------------------------------------------*/ |
---|
801 | rtems_device_driver disp_hcms29xx_dev_open |
---|
802 | ( |
---|
803 | /*-------------------------------------------------------------------------*\ |
---|
804 | | Purpose: | |
---|
805 | | open the display device | |
---|
806 | +---------------------------------------------------------------------------+ |
---|
807 | | Input Parameters: | |
---|
808 | \*-------------------------------------------------------------------------*/ |
---|
809 | rtems_device_major_number major, |
---|
810 | rtems_device_minor_number minor, |
---|
811 | void *arg |
---|
812 | ) |
---|
813 | /*-------------------------------------------------------------------------*\ |
---|
814 | | Return Value: | |
---|
815 | | rtems_status_code | |
---|
816 | \*=========================================================================*/ |
---|
817 | { |
---|
818 | disp_hcms29xx_drv_t *softc_ptr = &disp_hcms29xx_drv_tbl; |
---|
819 | /* |
---|
820 | * ensure, that disp_hcms29xx device is assumed to be empty |
---|
821 | */ |
---|
822 | softc_ptr->disp_param.dev_buf_cnt = 0; |
---|
823 | |
---|
824 | return RTEMS_SUCCESSFUL; |
---|
825 | } |
---|
826 | |
---|
827 | /*=========================================================================*\ |
---|
828 | | Function: | |
---|
829 | \*-------------------------------------------------------------------------*/ |
---|
830 | rtems_device_driver disp_hcms29xx_dev_write |
---|
831 | ( |
---|
832 | /*-------------------------------------------------------------------------*\ |
---|
833 | | Purpose: | |
---|
834 | | write to display device | |
---|
835 | +---------------------------------------------------------------------------+ |
---|
836 | | Input Parameters: | |
---|
837 | \*-------------------------------------------------------------------------*/ |
---|
838 | rtems_device_major_number major, |
---|
839 | rtems_device_minor_number minor, |
---|
840 | void *arg |
---|
841 | ) |
---|
842 | /*-------------------------------------------------------------------------*\ |
---|
843 | | Return Value: | |
---|
844 | | rtems_status_code | |
---|
845 | \*=========================================================================*/ |
---|
846 | { |
---|
847 | rtems_libio_rw_args_t *args = arg; |
---|
848 | uint32_t cnt; |
---|
849 | disp_hcms29xx_drv_t *softc_ptr = &disp_hcms29xx_drv_tbl; |
---|
850 | |
---|
851 | for (cnt = 0;cnt < args->count;cnt++) { |
---|
852 | /* |
---|
853 | * accumulate characters written into display dev buffer |
---|
854 | */ |
---|
855 | if (((softc_ptr->disp_param.dev_buf_cnt > 0) |
---|
856 | &&((args->buffer[cnt] == '\n') |
---|
857 | || (args->buffer[cnt] == '\0')) |
---|
858 | ) |
---|
859 | ||( softc_ptr->disp_param.dev_buf_cnt >= |
---|
860 | (int) sizeof(softc_ptr->disp_param.dev_buffer) - 1)) { |
---|
861 | softc_ptr->disp_param.dev_buffer[softc_ptr->disp_param.dev_buf_cnt] = '\0'; |
---|
862 | /* |
---|
863 | * transfer string to display string, redisplay it... |
---|
864 | */ |
---|
865 | disp_hcms29xx_update(softc_ptr,softc_ptr->disp_param.dev_buffer); |
---|
866 | softc_ptr->disp_param.dev_buf_cnt = 0; |
---|
867 | } |
---|
868 | /* |
---|
869 | * write to dev_buf, if '\n' occured or display device buffer is full |
---|
870 | */ |
---|
871 | if ((args->buffer[cnt] != '\n') && |
---|
872 | (args->buffer[cnt] != '\0')) { |
---|
873 | softc_ptr->disp_param.dev_buffer[softc_ptr->disp_param.dev_buf_cnt++] = |
---|
874 | args->buffer[cnt]; |
---|
875 | } |
---|
876 | } |
---|
877 | args->bytes_moved = args->count; |
---|
878 | |
---|
879 | return RTEMS_SUCCESSFUL; |
---|
880 | } |
---|
881 | |
---|
882 | /*=========================================================================*\ |
---|
883 | | Function: | |
---|
884 | \*-------------------------------------------------------------------------*/ |
---|
885 | rtems_device_driver disp_hcms29xx_dev_close |
---|
886 | ( |
---|
887 | /*-------------------------------------------------------------------------*\ |
---|
888 | | Purpose: | |
---|
889 | | close the display device | |
---|
890 | +---------------------------------------------------------------------------+ |
---|
891 | | Input Parameters: | |
---|
892 | \*-------------------------------------------------------------------------*/ |
---|
893 | rtems_device_major_number major, |
---|
894 | rtems_device_minor_number minor, |
---|
895 | void *arg |
---|
896 | ) |
---|
897 | /*-------------------------------------------------------------------------*\ |
---|
898 | | Return Value: | |
---|
899 | | rtems_status_code | |
---|
900 | \*=========================================================================*/ |
---|
901 | { |
---|
902 | |
---|
903 | return RTEMS_SUCCESSFUL; |
---|
904 | } |
---|
905 | |
---|
906 | /* |
---|
907 | * driver operation tables |
---|
908 | */ |
---|
909 | static rtems_driver_address_table disp_hcms29xx_ops = { |
---|
910 | .initialization_entry = disp_hcms29xx_dev_initialize, |
---|
911 | .open_entry = disp_hcms29xx_dev_open, |
---|
912 | .write_entry = disp_hcms29xx_dev_write, |
---|
913 | .close_entry = disp_hcms29xx_dev_close |
---|
914 | }; |
---|
915 | |
---|
916 | |
---|
917 | static disp_hcms29xx_drv_t disp_hcms29xx_drv_tbl = { |
---|
918 | {/* public fields */ |
---|
919 | .ops = &disp_hcms29xx_ops, |
---|
920 | .size = sizeof (disp_hcms29xx_drv_t), |
---|
921 | }, |
---|
922 | { /* our private fields */ |
---|
923 | 0, |
---|
924 | { 0 }, |
---|
925 | 0, |
---|
926 | { 0 }, |
---|
927 | { 0 }, |
---|
928 | 0, |
---|
929 | 0, |
---|
930 | 0, |
---|
931 | false |
---|
932 | } |
---|
933 | }; |
---|
934 | |
---|
935 | rtems_libi2c_drv_t *disp_hcms29xx_driver_descriptor = |
---|
936 | &disp_hcms29xx_drv_tbl.libi2c_drv_entry; |
---|
937 | |
---|