📄 tea5757.lst
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return (unsigned char)(i2c_read((unsigned int)I2C_FM, (unsigned char)fm_slaveaddr, (char)I2C_SUBADDR_NOUS
-E, ptr, (unsigned char)5));
}
unsigned char fm_wr_rtn(unsigned char *ptr)
{
return (unsigned char)(i2c_write((unsigned int)I2C_FM, (unsigned char)fm_slaveaddr, (char)I2C_SUBADDR_NOU
-SE, ptr, (unsigned char)5));
}
void fmw_pll_rtn(unsigned char hilo, unsigned int fm_freq)
{
unsigned char temp;
unsigned short fm_pll_val = 0;
if(hilo) fm_pll_val = (unsigned short)((4000*(fm_freq+225))/32768); // calc PLL decoder
else fm_pll_val = (unsigned short)((4000*(fm_freq-225))/32768);
temp = (unsigned char)((fm_pll_val >> 8) & 0x3f);
fm_wr_byte[0] &= 0xc0;
fm_wr_byte[0] |= temp;
temp = (unsigned char)fm_pll_val;
fm_wr_byte[1] = temp;
fmw_hilo_side_rtn(hilo);
}
unsigned char fm_hilo_optimal(unsigned int fm_freq)
{
C51 COMPILER V7.50 TEA5757 05/12/2009 22:59:41 PAGE 10
unsigned char status;
unsigned char temp;
unsigned char levelhigh, levellow;
fmw_pll_rtn(hi_side, fm_freq+450); // Set PLL value High
status = fm_wr_rtn(fm_wr_byte); // Send Command
delay720(20000);
status = fm_rd_rtn(fm_rd_byte); // Read status
levelhigh = fmr_level_adc_rtn(); // Get ADC value
fmw_pll_rtn(hi_side, fm_freq-450); // Set PLL value Low
status = fm_wr_rtn(fm_wr_byte);
delay720(20000);
status = fm_rd_rtn(fm_rd_byte);
levellow = fmr_level_adc_rtn();
if(levelhigh < levellow) temp = hi_side;
else temp = lo_side;
return temp;
}
void fm_init(void)
{
unsigned char i;
#if 0 /* lhm */
i2c_wr
i2c_clk_hi
i2c_data_hi
#endif /* lhm */
// fm_pwr_on // 20050111
delay720(100);
fm_khz = 89100; //107700;
fmw_all_mute_rtn(on); // MUTE OFF
fmw_search_mode_rtn(off); // OFF SearchMode
fmw_search_dir_rtn(up); // Search direction is up
fmw_search_level_rtn(mid_level); // search ADC level is middle
// fmw_search_level_rtn(lo_level); // search ADC level is middle
fmw_stereo_rtn(on); // Steleo ON
fmw_mute_left_rtn(off); // Left force mono off
fmw_mute_right_rtn(off); // Right force mono 0ff
fmw_stand_by_rtn(on); // Stanby off
// fmw_band_sel_rtn(japan); // Japan FM zone
fmw_band_sel_rtn(us_eu); // Japan FM zone
fmw_xtal_sel_rtn(xtal_32768); // set the x-tal to 32.768 KHz
fmw_soft_mute_rtn(on);
fmw_hcc_rtn(on); // HCC ON
fmw_snc_rtn(on); // SNC ON
fmw_search_indi_rtn(on); // Pin 14 is output for the ready flag
fmw_pll_ref_rtn(ref_65_dis); // 6.5Mhz ref. not enable
C51 COMPILER V7.50 TEA5757 05/12/2009 22:59:41 PAGE 11
fmw_deemph_rtn(deemph50); // deemphasis is 50us
i = fm_hilo_optimal(fm_khz); // HILO algorithm -> find optimize PLL
fmw_pll_rtn(i, fm_khz);
fmw_all_mute_rtn(off);
i = fm_wr_rtn(fm_wr_byte);
}
/*---------------------------------------- Change Hz and Auto Scan ---------------------------------------
-- */
void fm_manual_scan(unsigned char dir)
{
unsigned char status;
if(dir)
{
if(fm_khz >= 108000) fm_khz = 87500;
else fm_khz += scan_step;
}
else
{
if(fm_khz <= 87500) fm_khz = 108000;
else fm_khz -= scan_step;
}
status = fm_hilo_optimal(fm_khz);
fmw_pll_rtn(status, fm_khz);
//fmw_all_mute_rtn(off); // TEST
status = fm_wr_rtn(fm_wr_byte);
//LCD_DisplayChannelForFM(fm_khz);
}
unsigned char fm_auto_scan(unsigned char dir)
{
unsigned char status, curlev, curifc;
if(dir)
{
if(fm_khz >= 108000) fm_khz = 87500;
else fm_khz += scan_step;
}
else
{
if(fm_khz <= 87500) fm_khz = 108000;
else fm_khz -= scan_step;
}
//fmw_all_mute_rtn(on); // TEST
status = fm_wr_rtn(fm_wr_byte); // Edit By Jim
status = fm_hilo_optimal(fm_khz);
fmw_pll_rtn(status, fm_khz);
status = fm_wr_rtn(fm_wr_byte);
// delay720(20000);
delay720(30000);
C51 COMPILER V7.50 TEA5757 05/12/2009 22:59:41 PAGE 12
status = fm_rd_rtn(fm_rd_byte);
curlev = fmr_level_adc_rtn();
curifc = fmr_if_count_rtn();
// LCD_DisplayChannelForFM(fm_khz);
/*
if(fm_khz == 88000)
fm_khz = 88000;
else if(fm_khz == 89100)
fm_khz = 89100;
else if(fm_khz == 89700)
fm_khz = 89700;
else if(fm_khz == 91900)
fm_khz = 91900;
else if(fm_khz == 93100)
fm_khz = 93100;
else if(fm_khz == 93900)
fm_khz = 93900;
else if(fm_khz == 95100)
fm_khz = 95100;
else if(fm_khz == 95700)
fm_khz = 95700;
else if(fm_khz == 95900)
fm_khz = 95900;
else if(fm_khz == 97300)
fm_khz = 97300;
else if(fm_khz == 98100)
fm_khz = 98100;
else if(fm_khz == 99100)
fm_khz = 99100;
else if(fm_khz == 99600)
fm_khz = 99600;
else if(fm_khz == 100000)
fm_khz = 100000;
else if(fm_khz == 101100)
fm_khz = 101100;
else if(fm_khz == 101900)
fm_khz = 101900;
else if(fm_khz == 102700)
fm_khz = 102700;
else if(fm_khz == 103500)
fm_khz = 103500;
else if(fm_khz == 105300)
fm_khz = 105300;
else if(fm_khz == 106100)
fm_khz = 106100;
else if(fm_khz == 106900)
fm_khz = 106900;
else if(fm_khz == 107700)
fm_khz = 107700;
*/
// if((curlev > 3) && (0x30 < curifc) && (curifc < 0x3c) ) return 1; // scan_level
if((curlev > 3) && (0x30 < curifc) && (curifc < 0x3c) ) return 1; // scan_level
else
return 0;
}
unsigned int fm_auto_scan_detect(unsigned char dir)
{
unsigned char status, i;
unsigned char index = 1; // Edit By Jim
C51 COMPILER V7.50 TEA5757 05/12/2009 22:59:41 PAGE 13
unsigned int dumy_fm_khz = fm_khz;
for(i=0;i<10;i++)
{
if(fm_auto_scan(dir)) index++;
else break;
}
if(index%2)
{
if(dir) fm_khz = dumy_fm_khz + (unsigned int)((index/2)*100);
else fm_khz = dumy_fm_khz - (unsigned int)((index/2)*100);
}
else
{
if(dir) fm_khz = dumy_fm_khz + (unsigned int)(((index/2)-1)*100);
else fm_khz = dumy_fm_khz - (unsigned int)((index/2)*100);
}
status = fm_hilo_optimal(fm_khz);
fmw_pll_rtn(status, fm_khz);
//fmw_all_mute_rtn(off); TEST
status = fm_wr_rtn(fm_wr_byte);
// LCD_ClearOneLine(2);
// lcd_var(0, 2, fm_khz);
// LCD_DisplayChannelForFM(fm_khz);
return fm_khz;
}
#endif
#endif
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = ---- ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 45 ----
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 5 WARNING(S), 0 ERROR(S)
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