3 * RADIO CHIP AKC6955 Handler
4 * Copyright (C) 2013-06-10 K.Ohta <whatisthis.sowhat ai gmail.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2,
10 * or (at your option) any later version.
11 * This library / program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 * See the GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this library; see the file COPYING. If not, write to the
18 * Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
21 * As a special exception, if you link this(includeed from sdcc) library
22 * with other files, some of which are compiled with SDCC,
23 * to produce an executable, this library does not by itself cause
24 * the resulting executable to be covered by the GNU General Public License.
25 * This exception does not however invalidate any other reasons why
26 * the executable file might be covered by the GNU General Public License.
40 #include "commondef.h"
42 void akc6955_writecmd(unsigned char reg, unsigned char data)
46 i2c_open(I2C_MASTER, I2C_SLEW_ON, 5);
60 OpenI2C(MASTER, SLEW_OFF);
75 unsigned char akc6955_readcmd(unsigned char reg)
80 i2c_open(I2C_MASTER, I2C_SLEW_ON, 5);
82 OpenI2C(MASTER, SLEW_OFF);
124 void akc6955_chg_fm(unsigned char f)
127 b.byte = akc6955_readcmd(AKC6955_POWER);
132 akc6955_writecmd(AKC6955_POWER, b.byte);
136 unsigned char akc6955_get_fm(void)
139 b.byte = akc6955_readcmd(AKC6955_POWER);
147 void akc6955_set_amband(unsigned char band)
150 b = akc6955_readcmd(AKC6955_BAND);
151 b &= 0x07; // extract FM
152 b = b | ((band & 0x1f) << 3);
153 akc6955_writecmd(AKC6955_BAND, b);
156 void akc6955_set_fmband(unsigned char band)
159 b = akc6955_readcmd(AKC6955_BAND);
160 b &= 0xf8; // extract AM
161 b = b | (band & 0x07);
162 akc6955_writecmd(AKC6955_BAND, b);
165 unsigned char akc6955_get_amband(void)
168 b = akc6955_readcmd(AKC6955_BAND);
173 unsigned char akc6955_get_fmband(void)
176 b = akc6955_readcmd(AKC6955_BAND);
182 void akc6955_set_power(unsigned char on)
185 b.byte = akc6955_readcmd(AKC6955_POWER);
191 akc6955_writecmd(AKC6955_POWER, b.byte);
195 void akc6955_do_tune(void)
198 b.byte = akc6955_readcmd(AKC6955_POWER);
199 b.b5 = 0; // Tun = '0'
200 b.b4 = 0; // Force abort scan.
201 akc6955_writecmd(AKC6955_POWER, b.byte);
202 _AKC6955_WAIT_62_5MS();
204 b.b5= 1; // Tun = '1'
205 akc6955_writecmd(AKC6955_POWER, b.byte);
208 unsigned char akc6955_tune(void)
211 b.byte = akc6955_readcmd(AKC6955_RCH_HI);
219 unsigned int akc6955_mode3k(unsigned char flag)
222 b.byte = akc6955_readcmd(AKC6955_CH_HI);
228 akc6955_writecmd(AKC6955_CH_HI, b.byte);
230 _AKC6955_WAIT_62_5MS();
231 return akc6955_get_freq();
234 void akc6955_set_tune(unsigned char mode_3k, unsigned int ch)
241 f.byte = akc6955_readcmd(AKC6955_POWER);
246 band = akc6955_get_amband();
251 i = ch / 3; // On MW2, Channnel must be multiple of 3.
252 i = i * 3; // i = (i/3) * 3
254 if(i > 0x1fff) i = 0x1fff;
258 akc6955_writecmd(AKC6955_CH_LO, b.byte);
263 b.b5 = 1; // Mode 3K ON
265 akc6955_writecmd(AKC6955_CH_HI, b.byte);
270 void akc6955_do_scan(unsigned char up)
273 // akc6955_do_tune();
274 b.byte = akc6955_readcmd(AKC6955_POWER);
277 akc6955_writecmd(AKC6955_POWER, b.byte); // Falldown seek bit to '0'.
282 akc6955_writecmd(AKC6955_POWER, b.byte); // Raise seek bit to '1'.
285 void akc6955_abort_scan(void)
288 b = akc6955_readcmd(AKC6955_POWER);
290 akc6955_writecmd(AKC6955_POWER, b); // Falldown seek bit to '0'.
293 void akc6955_set_scanrate_fm(unsigned char rate)
296 c = akc6955_readcmd(AKC6955_SPACE);
297 c = (c & 0xcf) | ((rate & 0x03) << 4);
298 akc6955_writecmd(AKC6955_SPACE, c);
301 unsigned char akc6955_chk_donescan(void)
304 b = akc6955_readcmd(AKC6955_RCH_HI) & 0x40;
310 * Get AM/FM Frequency: ret = KHz at AM, 10KHz @FM.
312 unsigned int akc6955_get_freq(void)
319 // b = akc6955_readcmd(AKC6955_CNR_AM) & 0x80;
320 l = akc6955_readcmd(AKC6955_RCH_LO) ;
321 h = akc6955_readcmd(AKC6955_RCH_HI) & 0x1f;
322 f.byte = akc6955_readcmd(AKC6955_POWER);
325 freq = (i * 5) / 2 + 3000; // freq' = 25*i[KHz] = (25 / 10) *i [10KHz]
327 // freq = freq' + 30MHz = freq' + 3000[10KHz]
329 b.byte = akc6955_readcmd(AKC6955_CH_HI);
331 freq = i * 3; // freq = 3*i[KHz] = (4+1)*i[KHz]
333 freq = i * 5; // freq = 5i[KHz] = (2+1)i[KHz]
339 void akc6955_set_freq(unsigned int freq)
346 f.byte = akc6955_readcmd(AKC6955_POWER);
348 band = akc6955_get_fmband();
350 // if(freq < fmbands[band].start) freq = fmbands[band].start;
351 // if(freq >= fmbands[band].end) freq = fmbands[band].end - 1;
355 band = akc6955_get_amband();
356 if(band >= AKC6955_BAND_AMEND) band = AKC6955_BAND_AMEND - 1;
357 // if(freq < ambands[band].start) freq = ambands[band].start;
358 // if(freq >= ambands[band].end) freq = ambands[band].end - 1;
359 mode3k.byte = akc6955_readcmd(AKC6955_CNR_AM);
366 akc6955_set_tune(mode3k.b7, ch);
369 void akc6955_set_userband(unsigned char start, unsigned char stop, unsigned int ch, unsigned char mode3k)
373 f.byte = akc6955_readcmd(AKC6955_POWER);
374 akc6955_writecmd(AKC6955_UCH_ST, start);
375 akc6955_writecmd(AKC6955_UCH_EN, stop);
377 akc6955_set_fmband(AKC6955_BAND_FMUSER);
379 akc6955_set_amband(AKC6955_BAND_AMUSER);
381 akc6955_set_tune(mode3k, ch);
385 unsigned char akc6955_get_cnr(void)
389 f.byte = akc6955_readcmd(AKC6955_POWER);
391 b.byte = akc6955_readcmd(AKC6955_CNR_FM);
393 b.byte = akc6955_readcmd(AKC6955_CNR_AM);
399 int akc6955_read_level(void)
402 unsigned char rflevel, iflevel;
409 f.byte = akc6955_readcmd(AKC6955_POWER);
410 b = akc6955_readcmd(AKC6955_PGALEVEL);
411 rflevel = (b & 0xe0) >> 5;
412 iflevel = (b & 0x1c) >> 2;
413 totallevel = rflevel + iflevel;
415 rssi = (int)(akc6955_readcmd(AKC6955_RSSI) & 0x7f);
416 // totallevel = rssi + 6*totallevel;
417 level = (int)(totallevel * 6 + rssi);
419 level = 103 - level; // totallevel * 6
421 freq = akc6955_get_freq();
422 if(freq > 2560) { // ASSUME SW
424 } else { // ASSUME MW,LW
431 // Get diff. unit = 100Hz.
432 int akc6955_get_diff(void)
438 diff.byte = akc6955_readcmd(AKC6955_FDNUM);
441 n = -((int) diff.byte);
447 f.byte = akc6955_readcmd(AKC6955_POWER);
454 unsigned int akc6955_up_freq(unsigned int step)
460 f.byte = akc6955_readcmd(AKC6955_POWER);
461 freq = akc6955_get_freq();
464 band = akc6955_get_fmband();
465 if(band >= AKC6955_BAND_FMEND) band = AKC6955_BAND_FMEND - 1;
466 if(freq >= fmbands[band].end) freq = fmbands[band].end - 1;
468 band = akc6955_get_amband();
469 if(band >= AKC6955_BAND_AMEND) band = AKC6955_BAND_AMEND - 1;
470 if(freq >= ambands[band].end) freq = ambands[band].end - 1;
472 akc6955_set_freq(freq);
473 return akc6955_get_freq();
477 unsigned int akc6955_down_freq(unsigned int step)
483 freq = akc6955_get_freq();
484 if(freq <= step) return freq;
487 f.byte = akc6955_readcmd(AKC6955_POWER);
489 band = akc6955_get_amband();
490 if(band >= AKC6955_BAND_AMEND) band = AKC6955_BAND_AMEND - 1;
491 if(freq < ambands[band].start) freq = ambands[band].start;
493 band = akc6955_get_fmband();
494 if(band >= AKC6955_BAND_FMEND) band = AKC6955_BAND_FMEND - 1;
495 if(freq < fmbands[band].start) freq = fmbands[band].start;
497 akc6955_set_freq(freq);
498 return akc6955_get_freq();
500 void akc6955_setvolumemode(unsigned char flag)
503 c.byte = akc6955_readcmd(AKC6955_ENABLE);
508 akc6955_writecmd(AKC6955_ENABLE, c.byte);
511 unsigned char akc6955_getvolumemode(void)
514 c.byte = akc6955_readcmd(AKC6955_ENABLE);
521 void akc6955_setvolume(unsigned char level)
524 // c = akc6955_readcmd(AKC6955_VOLUME) & 0x03;
525 if(level > 63) level = 63;
526 akc6955_writecmd(AKC6955_VOLUME, ((akc6955_readcmd(AKC6955_VOLUME) & 0x03) | (level << 2)));
529 unsigned char akc6955_getvolume(void)
532 c = akc6955_readcmd(AKC6955_VOLUME) >> 2;
536 void akc6955_set_prevolume(unsigned char level)
539 c = akc6955_readcmd(AKC6955_PRE) & 0xf3;
540 c |= ((level & 0x03) << 2);
541 akc6955_writecmd(AKC6955_PRE, c);
544 unsigned char akc6955_get_prevolume(void)
547 c = akc6955_readcmd(AKC6955_PRE) & 0x0c;
553 void akc6955_setphase(unsigned char flag)
556 c.byte = akc6955_readcmd(AKC6955_VOLUME);
562 akc6955_writecmd(AKC6955_VOLUME, c.byte);
565 void akc6955_setline(unsigned char flag)
568 c.byte = akc6955_readcmd(AKC6955_VOLUME);
573 akc6955_writecmd(AKC6955_VOLUME, c.byte);
576 void akc6955_set_lowboost(unsigned char flag)
579 c.byte = akc6955_readcmd(AKC6955_STEREO);
584 akc6955_writecmd(AKC6955_STEREO, c.byte);
587 void akc6955_set_stereomode(unsigned char mode)
590 c = akc6955_readcmd(AKC6955_STEREO);
591 mode = (mode & 0x03) << 2;
592 c = (c & 0xf3) | mode;
593 akc6955_writecmd(AKC6955_STEREO, c);
596 unsigned char akc6955_get_stereo(void)
599 c = akc6955_readcmd(AKC6955_RCH_HI) & 0x80;
608 unsigned int akc6955_get_battery(void)
612 c = akc6955_readcmd(AKC6955_VBAT) & 0x3f;