src/ssm2602.c File Reference

• core module for audio codec

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#include <stdio.h>
#include "ssm2602.h"
#include <sys/exception.h>
#include "tll_sport.h"
#include <bf52xI2cMaster.h>
#include <isrDisp.h>
#include <tll6527_core_timer.h>

Include dependency graph for ssm2602.c:

Defines
#define	DELAY_TIME   0x20000
	.c This file contains the implementation of the analog loopback, digital loop back and digital playback features using SSM2602 Audio codec.
Functions
void	ssm2602_rxInit (void)
void	ssm2602_txInit (void)
int	ssm2602_txDma (unsigned char *address, int count)
	Set the tx DMA.
static int	ssm2602_registerWrite (unsigned char addr, unsigned int value)
	Function to set SSM2602 control registers Internal function only.
int	ssm2602_setVolume (eSsm2602Channel channel, unsigned char left, unsigned char right)
	SSM2602 set volume.
int	ssm2602_setSamplingFeq (eSsm2602Channel channel, eSsm2602SampleFreq freq)
	SSM2602 set sampling fequency.
int	ssm2602_init (isrDisp_t *pIsrDisp, int volumeOut, int frequency, int flags)
	Initialize the i2c interface and SSM2602 reset.

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Detailed Description

• core module for audio codec

Target: TLL6527v1-0 Compiler: VDSP++ Output format: VDSP++ "*.dxe"

Author:

Gunar Schirner Rohan Kangralkar

LastChange:

Id

ssm2602.c 1075 2013-03-11 04:11:52Z ovaskevi

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Define Documentation

#define DELAY_TIME   0x20000

.c This file contains the implementation of the analog loopback, digital loop back and digital playback features using SSM2602 Audio codec.

SSM2602 Audio codec is connected to the BF527 over I2C (control) and SPORT0 (data) interfaces. This modules try to configure & use SPORT0 for data transfer.

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Function Documentation

int ssm2602_init	(	isrDisp_t *	pIsrDisp,
		int	volumeOut,
		int	frequency,
		int	flags
	)

Initialize the i2c interface and SSM2602 reset.

This function:- 1. Initalizes the i2c interface as the master. 2. Soft resets the SSM2602 audio codec.

Pre-conditions:

• None.

Post condtions:

• SSM2602 is reset and ready.

Parameters:

Parameters:

None.

Returns:

Zero on success. Negative value on failure.

register own ISR with isr dispatcher

static int ssm2602_registerWrite	(	unsigned char	addr,
		unsigned int	value
	)			[static]

Function to set SSM2602 control registers Internal function only.

Pre-conditions:

• None.

Post condtions:

• None.

Parameters:

Parameters:

	addr	register address within the SSM2602 to write
	value	new register value

Returns:

Zero on success. Negative value on failure.

void ssm2602_rxInit

(

void

)

int ssm2602_setSamplingFeq	(	eSsm2602Channel	channel,
		eSsm2602SampleFreq	freq
	)

SSM2602 set sampling fequency.

Pre-conditions:

• CODEC has to be initialized by by ssm2602_i2c_init.

Post condtions:

Parameters:

Parameters:

srFreq

sampling frequency

Returns:

void

int ssm2602_setVolume	(	eSsm2602Channel	channel,
		unsigned char	left,
		unsigned char	right
	)

SSM2602 set volume.

Pre-conditions:

• CODEC has to be initialized by by ssm2602_i2c_init.

Post condtions:

Parameters:

Parameters:

	channel	input or output channel
	left	left volume (0 softest 127 loudest +6dB)
	right	right volume (0 softest 127 loudest +6dB)

Note for output volume <64 channel is muted

Returns:

void

int ssm2602_txDma	(	unsigned char *	address,
		int	count
	)

Set the tx DMA.

This function provides a user interface to set the TX dma

Pre-conditions:

• None.

Post condtions:

• None.

Parameters:

Parameters:

Memory

location, count

Returns:

Zero if passed. Negative value if failed.

void ssm2602_txInit

(

void

)

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