//*****************************************************************************
//
//! Initializes the sound output.
//!
//! This function prepares the sound driver to play songs or sound effects. It
//! must be called before any other sound function. The sound driver uses
//! uDMA and the caller must ensure that the uDMA peripheral is enabled and
//! its control table configured prior to making this call.
//!
//! \return None
//
//*****************************************************************************
void
SoundInit(void)
{
//
// Set the current active buffer to zero.
//
g_ulPlaying = 0;
//
// Enable and reset the peripheral.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2S0);
//
// Select alternate functions for all of the I2S pins.
//
ROM_SysCtlPeripheralEnable(I2S0_SCLKTX_PERIPH);
GPIOPinTypeI2S(I2S0_SCLKTX_PORT, I2S0_SCLKTX_PIN);
ROM_SysCtlPeripheralEnable(I2S0_LRCTX_PERIPH);
GPIOPinTypeI2S(I2S0_LRCTX_PORT, I2S0_LRCTX_PIN);
ROM_SysCtlPeripheralEnable(I2S0_SDATX_PERIPH);
GPIOPinTypeI2S(I2S0_SDATX_PORT, I2S0_SDATX_PIN);
ROM_SysCtlPeripheralEnable(I2S0_MCLKTX_PERIPH);
GPIOPinTypeI2S(I2S0_MCLKTX_PORT, I2S0_MCLKTX_PIN);
//
// Initialize the DAC.
//
WM8510Init();
//
// Set the intial volume level
//
WM8510VolumeSet(g_ucVolume);
//
// Set the FIFO trigger limit
//
I2STxFIFOLimitSet(I2S0_BASE, 4);
//
// Clear out all pending interrupts.
//
I2SIntClear(I2S0_BASE, I2S_INT_TXERR | I2S_INT_TXREQ );
//
// Enable the I2S interrupt on the NVIC
//
ROM_IntEnable(INT_I2S0);
//
// Disable all uDMA attributes.
//
ROM_uDMAChannelAttributeDisable(UDMA_CHANNEL_I2S0TX, UDMA_ATTR_ALL);
}
//*****************************************************************************
//
//! Initializes the sound output.
//!
//! \param ulEnableReceive is set to 1 to enable the receive portion of the I2S
//! controller and 0 to leave the I2S controller not configured.
//!
//! This function prepares the sound driver to play songs or sound effects. It
//! must be called before any other sound function. The sound driver uses
//! uDMA with the I2S controller so the caller must ensure that the uDMA
//! peripheral is enabled and its control table configured prior to making this
//! call. The GPIO peripheral and pins used by the I2S interface are
//! controlled by the I2S0_*_PERIPH, I2S0_*_PORT and I2S0_*_PIN definitions.
//!
//! \return None
//
//*****************************************************************************
void
SoundInit(unsigned long ulEnableReceive)
{
//
// Set the current active buffer to zero.
//
g_ulPlaying = 0;
g_ulRecording = 0;
//
// Enable and reset the peripheral.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2S0);
SysCtlPeripheralReset(SYSCTL_PERIPH_I2S0);
//
// Select alternate functions for all of the I2S pins.
//
SysCtlPeripheralEnable(I2S0_SCLKTX_PERIPH);
GPIOPinTypeI2S(I2S0_SCLKTX_PORT, I2S0_SCLKTX_PIN);
SysCtlPeripheralEnable(I2S0_MCLKTX_PERIPH);
GPIOPinTypeI2S(I2S0_MCLKTX_PORT, I2S0_MCLKTX_PIN);
SysCtlPeripheralEnable(I2S0_LRCTX_PERIPH);
GPIOPinTypeI2S(I2S0_LRCTX_PORT, I2S0_LRCTX_PIN);
SysCtlPeripheralEnable(I2S0_SDATX_PERIPH);
GPIOPinTypeI2S(I2S0_SDATX_PORT, I2S0_SDATX_PIN);
//
// Initialize the DAC.
//
TLV320AIC23BInit();
//
// Set the FIFO trigger limit
//
I2STxFIFOLimitSet(I2S0_BASE, 4);
//
// Clear out all pending interrupts.
//
I2SIntClear(I2S0_BASE, I2S_INT_TXERR | I2S_INT_TXREQ);
//
// Disable all uDMA attributes.
//
uDMAChannelAttributeDisable(UDMA_CHANNEL_I2S0TX, UDMA_ATTR_ALL);
//
// Only enable the RX channel if requested.
//
if(ulEnableReceive)
{
//
// Enable the I2S RX Data pin.
//
SysCtlPeripheralEnable(I2S0_SDARX_PERIPH);
GPIOPinTypeI2S(I2S0_SDARX_PORT, I2S0_SDARX_PIN);
//
// Set the FIFO trigger limit
//
I2SRxFIFOLimitSet(I2S0_BASE, 4);
//
// Enable the I2S Rx controller.
//
I2STxRxEnable(I2S0_BASE);
//
// Disable all DMA attributes.
//
uDMAChannelAttributeDisable(UDMA_CHANNEL_I2S0RX, UDMA_ATTR_ALL);
}
else
{
//
// Enable the I2S Tx controller.
//
I2STxEnable(I2S0_BASE);
}
//
// Enable the I2S interrupt on the NVIC
//
IntEnable(INT_I2S0);
}
//*****************************************************************************
//
//! Initialize the sound driver.
//!
//! This function initializes the audio hardware components of the EVALBOT,
//! in preparation for playing sounds using the sound driver.
//!
//! \return None.
//
//*****************************************************************************
void
SoundInit(void)
{
//
// Set the current active buffer to zero.
//
g_ulPlaying = 0;
//
// Enable and reset the peripheral.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2S0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
//
// Set up the pin mux.
//
GPIOPinConfigure(GPIO_PB6_I2S0TXSCK);
GPIOPinConfigure(GPIO_PE4_I2S0TXWS);
GPIOPinConfigure(GPIO_PE5_I2S0TXSD);
GPIOPinConfigure(GPIO_PF1_I2S0TXMCLK);
//
// Select alternate functions for all of the I2S pins.
//
SysCtlPeripheralEnable(I2S0_SCLKTX_PERIPH);
GPIOPinTypeI2S(I2S0_SCLKTX_PORT, I2S0_SCLKTX_PIN);
SysCtlPeripheralEnable(I2S0_MCLKTX_PERIPH);
GPIOPinTypeI2S(I2S0_MCLKTX_PORT, I2S0_MCLKTX_PIN);
SysCtlPeripheralEnable(I2S0_LRCTX_PERIPH);
GPIOPinTypeI2S(I2S0_LRCTX_PORT, I2S0_LRCTX_PIN);
SysCtlPeripheralEnable(I2S0_SDATX_PERIPH);
GPIOPinTypeI2S(I2S0_SDATX_PORT, I2S0_SDATX_PIN);
//
// Set up the DMA.
//
uDMAControlBaseSet(&DMAControlTable[0]);
uDMAEnable();
//
// Initialize the DAC.
//
DACInit();
//
// Set the FIFO trigger limit
//
I2STxFIFOLimitSet(I2S0_BASE, 4);
//
// Clear out all pending interrupts.
//
I2SIntClear(I2S0_BASE, I2S_INT_TXERR | I2S_INT_TXREQ );
//
// Disable all uDMA attributes.
//
uDMAChannelAttributeDisable(UDMA_CHANNEL_I2S0TX, UDMA_ATTR_ALL);
//
// Enable the I2S Tx controller.
//
I2STxEnable(I2S0_BASE);
}
