📄 tea5757.c
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stop_RDS_display_timeout=3;
if (!search_stop_flag && !auto_search_flag)
{
vfd_osd_timeout=0;
tuner_current_freq_disp();
#ifdef PHILIPS_GUI
if (!search_ante_flag && absolute_search_flag)
{
amp_vfd_backup();
VFD_msg(VFDMSG_prog_end);
}
#endif
absolute_search_flag=0;
}
if (search_stop_flag)
{
if(absolute_search_flag)
{
absolute_search_flag=0;
station_counter = 1 ;
read_freq_from_eeprom(station_counter);
hand_tuner();
write_current_freq();
tuner_current_freq_disp();
demute_proc();
#ifdef M62446
M62446_demute();
#endif
}
else if (auto_search_flag)
{
check_frequency();
hand_tuner();
tuner_current_freq_disp();
demute_proc();
#ifdef M62446
M62446_demute();
#endif
}
tdm_adc_turn_off();
tdm_adc_turn_on();
auto_search_flag=0;
search_stop_flag=0;
}
}
}
/************************************************************************
停台检测:
检测收音机是否收到台
*************************************************************************/
static void check_station()
{
int cnt,i,j,k;
unsigned long temp,temp1,temp2,temp4;
int temp3;
TRISTATE_5757DI ;
for( i=0; i<60000; i++ )
for( j=0; j<10; j++ )
k = 1;
if( auto_search_flag )
{
if(!TEA5757DI_IS_HIGH)
{
delay_5ms();
delay_5ms(); //tzh 921off for debug
temp = read_TEA5757() ;
temp = temp &0x7fff ;
if( fm_am_flag)
{
if(fm_freq_step ==20)
{
temp += 0x08 ;
cur_fm_freq= ((temp>>4)-0x1EB)*fm_freq_step +fm_freq_min ;
}
else if(fm_freq_step ==10)
{
temp += 0x04 ;
cur_fm_freq= ((temp>>3)-0x3D6)*fm_freq_step +fm_freq_min ;
}
else if(fm_freq_step ==5)
{
temp += 0x02;
cur_fm_freq= ((temp>>2)-0x7ac)*fm_freq_step +fm_freq_min ;
}
if(auto_search_flag==2) /*auto up*/
{
if((cur_fm_freq>(fm_freq_max+fm_freq_step))||(cur_fm_freq<(fm_freq_min -fm_freq_step)))
{
if((absolute_search_flag)&&(cur_fm_freq>(fm_freq_max+fm_freq_step))) // FM all_auto_search 12-10
{
#ifdef TUNER_AM
//开始跳转至AM段内收台
fm_am_flag = TUNER_MODE_AM ;
cur_am_freq = am_freq_min-6*am_freq_step ;
hand_tuner();
delay_100ms();
write_frequency() ;
#else
search_finish();
#endif
}
else
{
cur_fm_freq = (fm_freq_min-6*fm_freq_step);
hand_tuner();
delay_100ms();
write_frequency() ;
}
}
else ///////////have station
{
proc_find_station();
}
tdm_adc_turn_off();
tdm_adc_turn_on();
}
else /*auto down*/
{
if((cur_fm_freq<fm_freq_min-fm_freq_step)||
(cur_fm_freq>fm_freq_max+fm_freq_step))
{
cur_fm_freq = fm_freq_max +6*fm_freq_step;
hand_tuner();
delay_100ms();
write_frequency() ;
}
else ///////////have station
{
proc_find_station();
}
tdm_adc_turn_off();
tdm_adc_turn_on();
}
}
else /**AM auto search */
{
cur_am_freq = temp+am_freq_min -0x3d5 ;
if (cur_am_freq%am_freq_step)
{
temp1=((cur_am_freq/am_freq_step)*am_freq_step);
temp2=cur_am_freq-temp1;
if (temp2<=4)
{
cur_am_freq=temp1;
}
else
{
cur_am_freq=temp1+am_freq_step;
}
}
if(auto_search_flag==2) /*auto up*/
{
if ((cur_am_freq>am_freq_max+am_freq_step)||
(cur_am_freq<am_freq_min-am_freq_step))
{
if((absolute_search_flag) && (cur_am_freq>(am_freq_max+am_freq_step)))
{
/*FM~AM search finished*/
search_finish();
}
else
{
cur_am_freq = am_freq_min-6*am_freq_step;
hand_tuner();
delay_100ms();
write_frequency() ;
}
}
else ///////////have station
{
proc_find_station();
}
tdm_adc_turn_off();
tdm_adc_turn_on();
}
else /*auto down*/
{
if ((cur_am_freq<am_freq_min-am_freq_step)||
(cur_am_freq>am_freq_max+am_freq_step))
{
cur_am_freq = am_freq_max+6*am_freq_step;
hand_tuner();
delay_100ms();
write_frequency() ;
}
else ///////////have station
{
proc_find_station();
}
tdm_adc_turn_off();
tdm_adc_turn_on();
}
}
}
}
}
static void search_finish(void)
{
#ifdef PHILIPS_GUI
if (station_counter<2)
{
search_ante_flag=1;
}
#endif
auto_search_flag = 0 ;
station_counter = 1 ;
read_freq_from_eeprom(station_counter);
hand_tuner();
delay_100ms();
write_current_freq();
tuner_current_freq_disp();
demute_proc();
#ifdef M62446
M62446_demute();
#endif
}
static unsigned char proc_find_station(void)
{
if(absolute_search_flag) // FM all_auto_search 12-10
{
if(station_counter<=40)
{
write_freq_to_eeprom(station_counter);
if(station_counter==40)
{
VFD_msg(VFDMSG_prog_full);
tuner_program_timeout =3 ;
auto_search_flag = 0 ;
absolute_search_flag=0;
station_counter = 1 ;
read_freq_from_eeprom(station_counter);
hand_tuner() ;
}
else
{
if (fm_am_flag==TUNER_MODE_FM)
{
cur_fm_freq += fm_freq_step;
}
else
{
cur_am_freq += am_freq_step;
}
hand_tuner();
delay_100ms();
write_frequency() ;
#ifdef PHILIPS_GUI
extern unsigned char station_counter_temp;
station_counter_temp=station_counter;
amp_vfd_backup();
tuner_current_freq_disp();
VFD_segment_station(1);
#endif
station_counter ++;
}
write_e2prom(FM_AM_FLAG_ADDRESS,fm_am_flag);
}
}
else
{
auto_search_flag = 0 ;
if (fm_am_flag==TUNER_MODE_FM)
{
if(cur_fm_freq>fm_freq_max)
{
cur_fm_freq=fm_freq_max;
}
if(cur_fm_freq<fm_freq_min)
{
cur_fm_freq=fm_freq_min;
}
}
else
{
if(cur_am_freq>am_freq_max)
{
cur_am_freq=am_freq_max;
}
if(cur_am_freq<am_freq_min)
{
cur_am_freq=am_freq_min;
}
}
hand_tuner() ;
write_current_freq();
tuner_current_freq_disp();
write_e2prom(FM_AM_FLAG_ADDRESS,fm_am_flag);
demute_proc();
#ifdef M62446
M62446_demute();
#endif
}
}
/*************************************************************************
单步收台：
处理单步向上或向下收台
***************************************************************************/
void preset_station(void)
{
if(preset_up_down_mode==TUNER_UP)
{
freq_increase();
}
else
{
freq_decrease();
}
hand_tuner();
write_current_freq();
tuner_current_freq_disp();
}
/************************************************************************
检查频率：
对越界处理
*************************************************************************/
static void check_frequency()
{
if( fm_am_flag == TUNER_MODE_FM )
{
if( cur_fm_freq < fm_freq_min )
{
cur_fm_freq =fm_freq_max;
}
else if ( cur_fm_freq > fm_freq_max )
{
cur_fm_freq = fm_freq_min;
}
}
else
{
if( cur_am_freq < am_freq_min )
{
cur_am_freq = am_freq_max;
}
else if ( cur_am_freq > am_freq_max )
{
cur_am_freq = am_freq_min;
}
}
write_current_freq() ;
}
static void write_frequency()
{
unsigned long temp1=0;
unsigned long temp2=0;
temp2=tuner_sensitive;
if( fm_am_flag ) /* FM mode */
{
if(fm_freq_step ==20 ) //200k 0x1EB= 0x1eb0>>4
{
temp1 = (((cur_fm_freq /fm_freq_step)+0x1EB)-(fm_freq_min/fm_freq_step)) ; /*step :100k*/
temp1 = temp1<< 4 ; /* 6d6 0x7ac; 0x1eb0 ; 87.5+10.7MHZ*/
}
else if(fm_freq_step ==10 ) //step: 100k 0x3D6= 0x1eb0>>3
{
temp1 = (((cur_fm_freq /fm_freq_step)+0x3D6)-(fm_freq_min/fm_freq_step)) ; /*step :100k*/
temp1 = temp1<< 3 ; /* 6d6 0x7ac; 0x1eb0 ; 87.5+10.7MHZ*/
}
else if(fm_freq_step ==5 )
{
temp1 = (((cur_fm_freq /fm_freq_step)+0x7ac)-(fm_freq_min/fm_freq_step)) ; /*step : 50k*/
temp1 = temp1<< 2 ; /* 6d6 0x7ac; 0x1eb0 ; 87.5+10.7MHZ*/
}
if(auto_search_flag)
{
if( auto_search_flag==2)
{
temp1 = 0x1800000|temp1 | ((temp2 & 0xf0)<<12); /* indicate auto tuner up*/
}
else
{
temp1 = 0x1000000|temp1 | ((temp2 & 0xf0)<<12); /*indicate auto tuner down*/
}
}
}
else /* AM mode */
{
temp1 = cur_am_freq+0x3d5 -am_freq_min ; /* 0.5 to 10Mhz */
temp1 = 0x520000|temp1 ;
if(auto_search_flag)
{
if( auto_search_flag==2)
{
temp1 = 0x1d00000 |temp1 | ((temp2 & 0x0f)<<16); /*indicate auto tuner up*/
}
else
{
temp1 = 0x1500000|temp1 | ((temp2 & 0x0f)<<16); /* indicate auto tuner down*/
}
}
}
write_TEA5757(temp1);
CLEAR_FREQ_HOP ;
}
/*******************************************************
function: Hand step, first write control word and
current frequency to TEA5757
********************************************************/
void hand_tuner(void)
{
unsigned long reg1,data1 ;
pty_avail_flag=0; //tzh 040408 add for show pty
CLEAR5757CE;
SET5757CLK;
TRISTATE_5757DI;
if( fm_am_flag==TUNER_MODE_FM)
{
CLEAR_FREQ_HOP;
if(!stereo_mono_flag)
{
reg1 = 0x440000 ; //forced to mon state
}
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