/*C**************************************************************************
* NAME: clock.c
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE: snd1c-refd-nf-4_0_3
* REVISION: 1.7
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the clock routines
*
* NOTES:
* Configuration:
* - FOSC in config.h
*****************************************************************************/
/*_____ I N C L U D E S ____________________________________________________*/
#include "config.h" /* system configuration */
#include "lib_mcu\mp3\mp3_drv.h" /* mp3 driver definition */
#include "lib_mcu\aud\aud_drv.h" /* audio driver definition */
#include "lib_mcu\usb\usb_drv.h" /* usb driver definition */
#include "dac\dac_drv.h" /* dac driver definition */
#include "clock.h" /* clock definition */
/*_____ M A C R O S ________________________________________________________*/
/*_____ D E F I N I T I O N ________________________________________________*/
#if FOSC == 12000 /* Fpll= 12 * (R+1) / (N+1) */
St_clock code clock_div[8] =
{ 126, 14, 3, 11, _384Fs, /* Fs= 22.05 KHz, Fpll= 101.6 MHz, Fmp3= 25.4 MHz */
191, 24, 3, 9, _384Fs, /* Fs= 24 KHz, Fpll= 92.16 MHz, Fmp3= 23.04 MHz */
511, 74, 3, 19, _256Fs, /* Fs= 16 KHz, Fpll= 81.92 MHz, Fmp3= 20.48 MHz */
191, 24, 0, 29, _384Fs, /* Fs= 8 KHz, Fpll= 92.16 MHz, voice only */
126, 14, 3, 5, _384Fs, /* Fs= 44.1 KHz, Fpll= 101.6 MHz, Fmp3= 25.4 MHz */
191, 24, 3, 4, _384Fs, /* Fs= 48 KHz, Fpll= 92.16 MHz, Fmp3= 23.04 MHz */
511, 74, 3, 9, _256Fs, /* Fs= 32 KHz, Fpll= 81.92 MHz, Fmp3= 20.48 MHz */
15, 1, 1, 0, 0 /* USB only, Fpll= 96 MHz */
};
#endif
#if FOSC == 16000 /* Fpll= 16 * (R+1) / (N+1) */
St_clock code clock_div[8] =
{ 541, 95, 3, 15, _256Fs, /* Fs= 22.05 KHz, Fpll= 90.32 MHz, Fmp3= 22.58 MHz */
143, 24, 3, 9, _384Fs, /* Fs= 24 KHz, Fpll= 92.16 MHz, Fmp3= 23.04 MHz */
534, 94, 3, 21, _256Fs, /* Fs= 16 KHz, Fpll= 90.11 MHz, Fmp3= 22.53 MHz */
143, 24, 0, 29, _384Fs, /* Fs= 8 KHz, Fpll= 92.16 MHz, voice only */
541, 95, 3, 7, _256Fs, /* Fs= 44.1 KHz, Fpll= 90.32 MHz, Fmp3= 22.58 MHz */
143, 24, 3, 4, _384Fs, /* Fs= 48 KHz, Fpll= 92.16 MHz, Fmp3= 23.04 MHz */
534, 94, 3, 10, _256Fs, /* Fs= 32 KHz, Fpll= 90.11 MHz, Fmp3= 22.53 MHz */
11, 1, 1, 0, 0 /* USB only, Fpll= 96 MHz */
};
#endif
#if FOSC == 20000 /* Fpll= 20 * (R+1) / (N+1) */
St_clock code clock_div[8] =
{ 126, 24, 3, 11, _384Fs, /* Fs= 22.05 KHz, Fpll= 101.6 MHz, Fmp3= 25.4 MHz */
575, 124, 3, 9, _384Fs, /* Fs= 24 KHz, Fpll= 92.16 MHz, Fmp3= 23.04 MHz */
511, 124, 3, 19, _256Fs, /* Fs= 16 KHz, Fpll= 81.92 MHz, Fmp3= 20.48 MHz */
575, 124, 0, 29, _384Fs, /* Fs= 8 KHz, Fpll= 92.16 MHz, voice only */
126, 24, 3, 5, _384Fs, /* Fs= 44.1 KHz, Fpll= 101.6 MHz, Fmp3= 25.4 MHz */
575, 124, 3, 4, _384Fs, /* Fs= 48 KHz, Fpll= 92.16 MHz, Fmp3= 23.04 MHz */
511, 124, 3, 9, _256Fs, /* Fs= 32 KHz, Fpll= 81.92 MHz, Fmp3= 20.48 MHz */
23, 4, 1, 0, 0 /* USB only, Fpll= 96 MHz */
};
#endif
/*_____ D E C L A R A T I O N ______________________________________________*/
/*F**************************************************************************
* NAME: clock_song_init
*----------------------------------------------------------------------------
* PARAMS:
* freq: 0 -> 22.05 KHz
* 1 -> 24 KHz
* 2 -> 16 KHz
* 3 -> unused
* 4 -> 44.1 KHz
* 5 -> 48 KHz
* 6 -> 32 KHz
* 7 -> unused
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Song clock initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* freq is an index in the table giving the divider values
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void clock_song_init (Byte freq)
{
Pll_set_ndiv(clock_div[freq].n_div);
Pll_set_rdiv(clock_div[freq].r_div);
Pll_enable();
Mp3_set_clock(clock_div[freq].mp3_div);
Aud_set_clock(clock_div[freq].aud_div);
Dac_overclock((bit)(clock_div[freq].dac_over));
Aud_set_oversamp(clock_div[freq].dac_over); /* init HLR bit */
}
/*F**************************************************************************
* NAME: clock_voice_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Voice clock initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void clock_voice_init (void)
{
Pll_set_ndiv(clock_div[VOC_FREQ].n_div);
Pll_set_rdiv(clock_div[VOC_FREQ].r_div);
Pll_enable();
Aud_set_clock(clock_div[VOC_FREQ].aud_div);
Dac_overclock((bit)(clock_div[VOC_FREQ].dac_over));
Aud_set_oversamp(clock_div[VOC_FREQ].dac_over); /* init HLR bit */
}
/*F**************************************************************************
* NAME: clock_usb_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* USB clock initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void clock_usb_init (void)
{
Pll_set_ndiv(clock_div[USB_FREQ].n_div);
Pll_set_rdiv(clock_div[USB_FREQ].r_div);
Pll_enable();
Usb_set_clock(clock_div[USB_FREQ].mp3_div); /* mp3_div = usb_div */
}
/*F**************************************************************************
* NAME: clock_disable
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Clocks stop
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void clock_disable (void)
{
Pll_stop();
Mp3_set_clock(0);
Aud_set_clock(0);
Usb_set_clock(0);
}
