/*----------------------------------------------------------------------

	File:        inicodec.c

	Description: Setups the on-board codec to sample from line-in,

	             at 16-bit 2-channel per sample

	             Set up mcbsp0 to at 32-bit per sample.

	 -----------------------------------------------------------------------*/



#include <common.h>

#include <codec.h>

#include <mcbspdrv.h>



int inicodec (int sampling_rate)

{   int status;



	Mcbsp_dev dev;

	Mcbsp_config mcbspConfig;



	status =	mcbsp_drv_init();

	

	if (status==ERROR)

	{printf("Error initialising the McBSP driver\n");

	return (ERROR);

	}

	dev = mcbsp_open(0);

	if (dev == 0) return FALSE;



	memset(&mcbspConfig,0,sizeof(mcbspConfig));

	mcbspConfig.loopback = FALSE;

	mcbspConfig.tx.update = TRUE;

	mcbspConfig.tx.clock_polarity = CLKX_POL_RISING;

	mcbspConfig.tx.frame_sync_polarity = FSYNC_POL_HIGH;

	mcbspConfig.tx.clock_mode = CLK_MODE_EXT;

	mcbspConfig.tx.frame_sync_mode = FSYNC_MODE_EXT;

	mcbspConfig.tx.phase_mode = SINGLE_PHASE;

	mcbspConfig.tx.frame_length1 = 0;

	mcbspConfig.tx.word_length1 = WORD_LENGTH_32;

	mcbspConfig.tx.frame_ignore = FRAME_IGNORE;

	mcbspConfig.tx.data_delay = DATA_DELAY0;

	mcbspConfig.rx.update = TRUE;

	mcbspConfig.rx.clock_polarity = CLKX_POL_RISING;

	mcbspConfig.rx.frame_sync_polarity = FSYNC_POL_HIGH;

	mcbspConfig.rx.clock_mode = CLK_MODE_EXT;

	mcbspConfig.rx.frame_sync_mode = FSYNC_MODE_EXT;

	mcbspConfig.rx.phase_mode = SINGLE_PHASE;

	mcbspConfig.rx.frame_length1 = 0;

	mcbspConfig.rx.word_length1 = WORD_LENGTH_32;

	mcbspConfig.rx.frame_ignore = FRAME_IGNORE;

	mcbspConfig.rx.data_delay = DATA_DELAY0;

	if (mcbsp_config(dev,&mcbspConfig)==ERROR) return FALSE;



	MCBSP_ENABLE (0, 3);  // Bring Serial Port 0 out of reset, 3 means both rx and tx.



	codec_init ();                                          // Initialise on-board codec, enabling it as well.

	codec_serial_port_enable (SERIAL_32BIT);                // Enable codec serial i/o and set serial format to 32-bit.

	codec_change_sample_rate (sampling_rate, TRUE);         // Set the sampling rate.

	codec_adc_control (LEFT, 0.0, FALSE, LINE_SEL);         // Unmute left ADC, set gain select source from line input

	codec_adc_control (RIGHT, 0.0, FALSE, LINE_SEL);        // Unmute right ADC, set gain select source from line input

	codec_line_in_control (LEFT, MAX_AUX_LINE_GAIN, TRUE);  // Set left line input volume and mute direct loopback to DAC

	codec_line_in_control (RIGHT, MAX_AUX_LINE_GAIN, TRUE); // Set right line input volume and mute direct loopback to DAC

	codec_dac_control (LEFT, 0.0, FALSE);                   // Unmute left DAC and set volume.

	codec_dac_control (RIGHT, 0.0, FALSE);                  // Unmute right DAC and set volume.



	return TRUE;

}