256 lines
7.6 KiB
C
256 lines
7.6 KiB
C
//*****************************************************************************
|
|
// i2s_if.c
|
|
//
|
|
// I2S interface APIs.
|
|
//
|
|
// Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
|
|
//
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions
|
|
// are met:
|
|
//
|
|
// Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
//
|
|
// Redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the
|
|
// distribution.
|
|
//
|
|
// Neither the name of Texas Instruments Incorporated nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! \addtogroup microphone
|
|
//! @{
|
|
//
|
|
//*****************************************************************************
|
|
/* Standard includes. */
|
|
#include <stdio.h>
|
|
|
|
/* Hardware & driverlib library includes. */
|
|
#include "hw_types.h"
|
|
#include "hw_mcasp.h"
|
|
#include "hw_ints.h"
|
|
#include "hw_memmap.h"
|
|
#include "debug.h"
|
|
#include "prcm.h"
|
|
#include "rom.h"
|
|
#include "rom_map.h"
|
|
#include "udma.h"
|
|
#include "interrupt.h"
|
|
#include "prcm.h"
|
|
#include "uart.h"
|
|
#include "pin.h"
|
|
#include "i2s.h"
|
|
|
|
// common interface includes
|
|
#include "common.h"
|
|
|
|
/* Demo app includes. */
|
|
#include "i2s_if.h"
|
|
#include "gpio_if.h"
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Returns the pointer to transfer Audio samples to be rendered
|
|
//!
|
|
//! \param None
|
|
//!
|
|
//! This function
|
|
//! 1. Returns the pointer to the data buffer
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
unsigned int* AudioRendererGetDMADataPtr()
|
|
{
|
|
return (unsigned int *)(I2S_TX_DMA_PORT);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Returns the pointer to transfer Audio samples to be captured
|
|
//!
|
|
//! \param None
|
|
//!
|
|
//! This function
|
|
//! 1. Returns the pointer to the data buffer
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
unsigned int* AudioCapturerGetDMADataPtr()
|
|
{
|
|
return (unsigned int *)(I2S_RX_DMA_PORT);
|
|
}
|
|
|
|
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Initialize the audio capture or render
|
|
//!
|
|
//! \param None
|
|
//!
|
|
//! This function initializes
|
|
//! 1. Initializes the McASP module
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void AudioInit()
|
|
{
|
|
//
|
|
// Initialising the McASP
|
|
//
|
|
MAP_PRCMPeripheralClkEnable(PRCM_I2S,PRCM_RUN_MODE_CLK);
|
|
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Setup the Audio capturer callback routine and the interval of callback.
|
|
//! On the invocation the callback is expected to fill the AFIFO with enough
|
|
//! number of samples for one callback interval.
|
|
//!
|
|
//! \param pfnAppCbHndlr is the callback handler that is invoked when
|
|
//! \e ucCallbackEvtSamples space is available in the audio FIFO
|
|
//! \param ucCallbackEvtSamples is used to configure the callback interval
|
|
//!
|
|
//! This function initializes
|
|
//! 1. Initializes the interrupt callback routine
|
|
//! 2. Sets up the AFIFO to interrupt at the configured interval
|
|
//!
|
|
//! \return 0 - Success
|
|
//! -1 - Failure
|
|
//
|
|
//*****************************************************************************
|
|
long AudioSetupDMAMode(void (*pfnAppCbHndlr)(void),
|
|
unsigned long ulCallbackEvtSamples,
|
|
unsigned char RxTx)
|
|
{
|
|
MAP_I2SIntEnable(I2S_BASE,I2S_INT_XDATA);
|
|
#ifdef USE_TIRTOS
|
|
long lRetVal = -1;
|
|
lRetVal = osi_InterruptRegister(INT_I2S, pfnAppCbHndlr, INT_PRIORITY_LVL_1);
|
|
ASSERT_ON_ERROR(lRetVal);
|
|
|
|
|
|
#else
|
|
MAP_I2SIntRegister(I2S_BASE,pfnAppCbHndlr);
|
|
#endif
|
|
|
|
if(RxTx == I2S_MODE_RX_TX)
|
|
{
|
|
MAP_I2SRxFIFOEnable(I2S_BASE,8,1);
|
|
}
|
|
|
|
if(RxTx & I2S_MODE_TX)
|
|
{
|
|
MAP_I2STxFIFOEnable(I2S_BASE,8,1);
|
|
}
|
|
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Initialize the AudioCaptureRendererConfigure
|
|
//!
|
|
//! \param[in] bitsPerSample - Number of bits per sample
|
|
//! \param[in] bitRate - Bit rate
|
|
//! \param[in] noOfChannels - Number of channels
|
|
//! \param[in] RxTx - Play or record or both
|
|
//! \param[in] dma - 1 for dma and 0 for non-dma mode
|
|
//!
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
|
|
void AudioCaptureRendererConfigure(unsigned char bitsPerSample,
|
|
unsigned short bitRate,
|
|
unsigned char noOfChannels,
|
|
unsigned char RxTx,
|
|
unsigned char dma)
|
|
{
|
|
unsigned long bitClk;
|
|
|
|
bitClk = bitsPerSample * bitRate * noOfChannels;
|
|
|
|
if(dma)
|
|
{
|
|
if(bitsPerSample == 16)
|
|
{
|
|
MAP_PRCMI2SClockFreqSet(512000);
|
|
MAP_I2SConfigSetExpClk(I2S_BASE,512000,bitClk,I2S_SLOT_SIZE_16|
|
|
I2S_PORT_DMA);
|
|
}
|
|
}
|
|
|
|
if(RxTx == I2S_MODE_RX_TX)
|
|
{
|
|
MAP_I2SSerializerConfig(I2S_BASE,I2S_DATA_LINE_1,I2S_SER_MODE_RX,
|
|
I2S_INACT_LOW_LEVEL);
|
|
}
|
|
|
|
if(RxTx & I2S_MODE_TX)
|
|
{
|
|
MAP_I2SSerializerConfig(I2S_BASE,I2S_DATA_LINE_0,I2S_SER_MODE_TX,
|
|
I2S_INACT_LOW_LEVEL);
|
|
}
|
|
|
|
}
|
|
//*****************************************************************************
|
|
//
|
|
//! Initialize the Audio_Start
|
|
//!
|
|
//! \param[in] RxTx - Flag for play or record or both
|
|
//!
|
|
//! This function initializes
|
|
//! 1. Enable the McASP module for TX and RX
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
|
|
void Audio_Start(unsigned char RxTx)
|
|
{
|
|
if(RxTx == I2S_MODE_RX_TX)
|
|
{
|
|
MAP_I2SEnable(I2S_BASE,I2S_MODE_TX_RX_SYNC);
|
|
}
|
|
else if(RxTx & I2S_MODE_TX)
|
|
{
|
|
MAP_I2SEnable(I2S_BASE,I2S_MODE_TX_ONLY);
|
|
}
|
|
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// Close the Doxygen group.
|
|
//! @}
|
|
//
|
|
//*****************************************************************************
|