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https://github.com/rvtr/twl_wrapsdk.git
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99160420da
git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/twl_wrapsdk/trunk@269 4ee2a332-4b2b-5046-8439-1ba90f034370
272 lines
7.5 KiB
C
272 lines
7.5 KiB
C
/*---------------------------------------------------------------------------*
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Project: TwlSDK - SND - libraries
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File: snd_i2s.c
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Copyright 2004-2006 Nintendo. All rights reserved.
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These coded instructions, statements, and computer programs contain
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proprietary information of Nintendo of America Inc. and/or Nintendo
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Company Ltd., and are protected by Federal copyright law. They may
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not be disclosed to third parties or copied or duplicated in any form,
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in whole or in part, without the prior written consent of Nintendo.
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$Log: snd_i2s.c,v $
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$NoKeywords: $
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*---------------------------------------------------------------------------*/
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#include <twl/snd/ARM7/i2s.h>
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#include <twl/os.h>
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#include <twl/misc.h>
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#include <twl/cdc.h>
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#include <nitro/hw/ARM7/ioreg_SND.h>
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/******************************************************************************
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static typedef declaration
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******************************************************************************/
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/******************************************************************************
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static variables
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******************************************************************************/
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static u16 state;
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static BOOL isTwl = FALSE;
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/******************************************************************************
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static functions
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******************************************************************************/
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static void I2Si_Init(void)
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{
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static BOOL isInitialized = FALSE;
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if (isInitialized == FALSE)
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{
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isInitialized = TRUE;
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reg_SND_POWCNT |= REG_SND_POWCNT_SPE_MASK;
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/* CODEC“Æ—§‰^“®
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if ((reg_CFG_CLK & REG_CFG_CLK_SND_MASK) == 0)
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{
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// initialize codec with enabling I2S
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CDC_Init();
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}
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*/
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reg_CFG_TWL_EX |= REG_CFG_TWL_EX_I2S_MASK;
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if (reg_CFG_TWL_EX & REG_CFG_TWL_EX_I2S_MASK)
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{
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isTwl = TRUE;
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// Set default values
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// I2S_SetSamplingRatio(TRUE); <09>ŸŽè‚É48k‚É‚³‚ꂽ‚ç<E2809A>¢‚é
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I2S_SetMixingRatio(8);
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I2S_Mute(FALSE);
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}
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}
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}
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/******************************************************************************
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public functions
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******************************************************************************/
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/*---------------------------------------------------------------------------*
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Name: I2S_Enable
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Description: Enable sound master control
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Arguments: None
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Returns: None
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*---------------------------------------------------------------------------*/
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void I2S_Enable(void)
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{
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I2Si_Init();
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if (isTwl)
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{
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reg_SND_I2SCNT |= REG_SND_I2SCNT_E_MASK;
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}
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_Disable
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Description: Disable sound master control
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Arguments: None
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Returns: None
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*---------------------------------------------------------------------------*/
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void I2S_Disable(void)
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{
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if (isTwl)
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{
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reg_SND_I2SCNT &= ~REG_SND_I2SCNT_E_MASK;
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}
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_Shutdown
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Description: shutdown sound system
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Arguments: None.
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Returns: None.
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*---------------------------------------------------------------------------*/
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void I2S_Shutdown(void)
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{
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}
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/*---------------------------------------------------------------------------*
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Name: SND_BeginSleep
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Description: Begin sleep
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Arguments: None.
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Returns: None.
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*---------------------------------------------------------------------------*/
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void I2S_BeginSleep(void)
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{
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if (isTwl)
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{
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state = reg_SND_I2SCNT;
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}
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}
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/*---------------------------------------------------------------------------*
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Name: SND_EndSleep
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Description: End sleep
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Arguments: None.
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Returns: None.
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*---------------------------------------------------------------------------*/
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void I2S_EndSleep(void)
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{
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if (isTwl)
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{
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reg_SND_I2SCNT = state;
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}
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_Mute
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Description: Set mute status
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Arguments: isMute : TRUE if mute
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Returns: None
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*---------------------------------------------------------------------------*/
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void I2S_Mute(BOOL isMute)
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{
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if (isTwl)
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{
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if (isMute)
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{
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reg_SND_I2SCNT |= REG_SND_I2SCNT_MUTE_MASK;
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}
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else
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{
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reg_SND_I2SCNT &= ~REG_SND_I2SCNT_MUTE_MASK;
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}
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}
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_IsMute
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Description: Get mute status
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Arguments: None
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Returns: TRUE if mute
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*---------------------------------------------------------------------------*/
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BOOL I2S_IsMute(void)
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{
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return (BOOL)((reg_SND_I2SCNT & REG_SND_I2SCNT_MUTE_MASK) >> REG_SND_I2SCNT_MUTE_SHIFT);
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_SetMixingRatio
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Description: Set mixing ratio
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Arguments: nitroRatio : NITRO : DSP ratio. (0-8)
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if 8, nitro sound is all.
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if 0, DSP sound is all.
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Returns: None
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*---------------------------------------------------------------------------*/
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void I2S_SetMixingRatio(int nitroRatio)
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{
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if (isTwl)
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{
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if (nitroRatio >= 0 && nitroRatio <= 8)
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{
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reg_SND_I2SCNT &= ~REG_SND_I2SCNT_MIX_RATIO_MASK;
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reg_SND_I2SCNT = (u8)((reg_SND_I2SCNT & ~REG_SND_I2SCNT_MIX_RATIO_MASK) | (nitroRatio << REG_SND_I2SCNT_MIX_RATIO_SHIFT));
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}
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}
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_GetMixingRatio
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Description: Set mixing ratio
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Arguments: None
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Returns: NITRO : DSP ratio. (0-8)
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if 8, nitro sound is all.
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if 0, DSP sound is all.
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*---------------------------------------------------------------------------*/
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int I2S_GetMixingRatio(void)
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{
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return (reg_SND_I2SCNT & REG_SND_I2SCNT_MIX_RATIO_MASK) >> REG_SND_I2SCNT_MIX_RATIO_SHIFT;
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_SetSamplingRatio
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Description: Set I2S sampling ratio.
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It can be called while I2S is disabled.
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Arguments: is48kHz : set 48 kHz if TRUE. set 32kHz if FALSE.
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Returns: None
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*---------------------------------------------------------------------------*/
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void I2S_SetSamplingRatio(BOOL is48kHz)
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{
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if (isTwl)
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{
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if (is48kHz)
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{
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reg_SND_I2SCNT |= REG_SND_I2SCNT_CODEC_SMP_MASK;
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}
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else
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{
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reg_SND_I2SCNT &= ~REG_SND_I2SCNT_CODEC_SMP_MASK;
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}
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CDC_SetParamPLL(is48kHz);
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}
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}
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/*---------------------------------------------------------------------------*
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Name: I2S_IsSamplingRatio48kHz
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Description: Get I2S sampling ratio.
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Arguments: None
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Returns: TRUE if 48 kHz. otherwise FALSE
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*---------------------------------------------------------------------------*/
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BOOL I2S_IsSamplingRatio48kHz(void)
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{
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return (BOOL)((reg_SND_I2SCNT & REG_SND_I2SCNT_CODEC_SMP_MASK) >> REG_SND_I2SCNT_CODEC_SMP_SHIFT);
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}
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/*====== End of snd_i2s.c ======*/
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