//*****************************************************************************
//
//! 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);
}
int main(void)
{
long address = 0;
int record = 0;
int selector_efecto = 0;
///tremolo2
double trem_triangular = -0.5;
int trem_subida = 1;
///tremolo2
///wahwah
double wah_triangular = 500;
int wah_subida = 1;
double last_wah_wah_yb, last_wah_wah_yh, last_wah_wah_yl;
int first_time_wah_wah_function = 1;
///wahwah
///phaser
double phaser_triangular = 500;
int phaser_subida = 1;
int first_time_phaser_function = 1;
double last_phaser_yb, last_phaser_yh, last_phaser_yl;
//Phaser
/* Configure Oscillator to operate the device at 40MHz.
* Fosc= Fin*M/(N1*N2), Fcy=Fosc/2
* Fosc= 700Mhz for 7.37M input clock */
PLLFBD=41; /* M=39 */
CLKDIVbits.PLLPOST=0; /* N1=2 */
CLKDIVbits.PLLPRE=0; /* N2=2 */
OSCTUN=0;
__builtin_write_OSCCONH(0x01); /* Initiate Clock Switch to FRC with PLL*/
__builtin_write_OSCCONL(0x01);
while (OSCCONbits.COSC != 0b01); /* Wait for Clock switch to occur */
while(!OSCCONbits.LOCK);
/* Intialize the board and the drivers */
SASKInit();
WM8510Init(codecHandle,codecBuffer);
/* Start Audio input and output function */
WM8510Start(codecHandle);
/* Configure codec for 8K operation */
WM8510SampleRate8KConfig(codecHandle);
/* Main processing loop. Executed for every input and
* output frame */
while(1) {
/*Obtain Audio Samples */
while(WM8510IsReadBusy(codecHandle));
WM8510Read(codecHandle,samples,FRAME_SIZE);
G711Lin2Ulaw(samples,encodedSamples,FRAME_SIZE);
/* Decode the samples */
G711Ulaw2Lin (encodedSamples,decodedSamples, FRAME_SIZE);
/* Wait till the codec is available for a new frame */
while(WM8510IsWriteBusy(codecHandle));
switch(selector_efecto) {
case 0:
// prenden los leds
RED_LED=SASK_LED_OFF;
YELLOW_LED=SASK_LED_OFF;
GREEN_LED=SASK_LED_OFF;
// se activa el clean
break;
case 1:
// prenden los leds
RED_LED=SASK_LED_OFF;
YELLOW_LED=SASK_LED_OFF;
GREEN_LED=SASK_LED_ON;
// Se activa el efecto de tremolo
tremolo_effect(decodedSamples);
break;
case 2:
// prenden los leds
RED_LED=SASK_LED_OFF;
YELLOW_LED=SASK_LED_ON;
GREEN_LED=SASK_LED_OFF;
// Se activa el efecto de tremolo2
trem_triangular = tremolo_effect2(trem_triangular, &trem_subida, decodedSamples);
break;
case 3:
// prenden los leds
RED_LED=SASK_LED_OFF;
YELLOW_LED=SASK_LED_ON;
GREEN_LED=SASK_LED_ON;
// Se activa el efecto de fuzz
fuzz_effect(decodedSamples);
break;
case 4:
// prenden los leds
RED_LED=SASK_LED_ON;
YELLOW_LED=SASK_LED_OFF;
GREEN_LED=SASK_LED_OFF;
// Se activa el efecto de wah wah
wah_triangular = wah_wah_effect(wah_triangular, &wah_subida, decodedSamples, &last_wah_wah_yb, &last_wah_wah_yh, &last_wah_wah_yl, &first_time_wah_wah_function);
break;
case 5:
// prenden los leds
RED_LED=SASK_LED_ON;
YELLOW_LED=SASK_LED_OFF;
GREEN_LED=SASK_LED_ON;
phaser_triangular = phaser_effect(phaser_triangular, &phaser_subida, decodedSamples, &last_phaser_yb, &last_phaser_yh, &last_phaser_yl, &first_time_phaser_function);
// Se activa el efecto de wah wah
break;
case 6:
// prenden los leds
RED_LED=SASK_LED_ON;
YELLOW_LED=SASK_LED_ON;
GREEN_LED=SASK_LED_OFF;
// Se activa el efecto de wah wah
break;
case 7:
// prenden los leds
RED_LED=SASK_LED_ON;
YELLOW_LED=SASK_LED_ON;
GREEN_LED=SASK_LED_ON;
// Se activa el efecto de wah wah
break;
default:
break;
}
/* Write the frame to the output */
WM8510Write (codecHandle,decodedSamples,FRAME_SIZE);
if(CheckSwitchS1()){
selector_efecto--;
}
if(CheckSwitchS2()){
selector_efecto++;
}
// rango de 0-7 para selector de efectos
if (selector_efecto < 0 ) {
selector_efecto = 7;
}
if (selector_efecto > 7 ) {
selector_efecto = 0;
}
}
}
