c6416dskinit.c

DSP TMS320C6416, This is starup for chip

//C6416dskinit.c Includes functions from TI in the C6416 CSL and C6416DSK BSL

#include "C6416dskinit.h"
#define using_bios //if BIOS don't use top of vector table
extern Uint32 fs; //for sampling frequency

void c6416_dsk_init() //dsp-peripheral initialization
{
	DSK6416_init(); //call BSL to init DSK-EMIF,PLL)

	hAIC23_handle=DSK6416_AIC23_openCodec(0, &config);//handle(pointer) to codec
	DSK6416_AIC23_setFreq(hAIC23_handle, fs); //set sample rate
	MCBSP_config(DSK6416_AIC23_DATAHANDLE,&AIC23CfgData);//interface 32 bits toAIC23

	MCBSP_start(DSK6416_AIC23_DATAHANDLE, MCBSP_XMIT_START | MCBSP_RCV_START |
	MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC, 220);//start data channel again
}

void comm_poll() //added for communication/init using polling
{
	poll=1; //1 if using polling
	c6416_dsk_init(); //init DSP and codec
}

void comm_intr() //for communication/init using interrupt
{
	poll=0; //0 since not polling
	IRQ_globalDisable(); //disable interrupts
	c6416_dsk_init(); //init DSP and codec
	CODECEventId=MCBSP_getXmtEventId(DSK6416_AIC23_codecdatahandle);//McBSP1 Xmit

	#ifndef using_bios //do not need to point to vector table
	IRQ_setVecs(vectors); //point to the IRQ vector table
	#endif //since interrupt vector handles this

	IRQ_map(CODECEventId, 11); //map McBSP1 Xmit to INT11
	IRQ_reset(CODECEventId); //reset codec INT 11
	IRQ_globalEnable(); //globally enable interrupts
	IRQ_nmiEnable(); //enable NMI interrupt
	IRQ_enable(CODECEventId); //enable CODEC eventXmit INT11

	output_sample(0); //start McBSP interrupt outputting a sample
}

void output_sample(Uint32 out_data) //for out to Left and Right channels
{
	short CHANNEL_data;

	AIC_data.uint=0; //clear data structure
	AIC_data.uint=out_data; //32-bit data -->data structure

//The existing interface defaults to right channel. To default instead to the
//left channel and use output_sample(short), left and right channels are swapped
//In main source program use LEFT 0 and RIGHT 1 (opposite of what is used here)
	CHANNEL_data=AIC_data.channel[RIGHT]; //swap left and right channels
	AIC_data.channel[RIGHT]=AIC_data.channel[LEFT];
	AIC_data.channel[LEFT]=CHANNEL_data;
	if (poll) while(!MCBSP_xrdy(DSK6416_AIC23_DATAHANDLE));//if ready to transmit
	MCBSP_write(DSK6416_AIC23_DATAHANDLE,AIC_data.uint);//write/output data
}

void output_left_sample(short out_data) //for output from left channel
{
	AIC_data.uint=0; //clear data structure
	AIC_data.channel[LEFT]=out_data; //data from Left channel -->data structure

	if (poll) while(!MCBSP_xrdy(DSK6416_AIC23_DATAHANDLE));//if ready to transmit
		MCBSP_write(DSK6416_AIC23_DATAHANDLE,AIC_data.uint);//output left channel
}

void output_right_sample(short out_data) //for output from right channel
{
	AIC_data.uint=0; //clear data structure
	AIC_data.channel[RIGHT]=out_data; //data from Right channel -->data structure

	if (poll) while(!MCBSP_xrdy(DSK6416_AIC23_DATAHANDLE));//if ready to transmit
		MCBSP_write(DSK6416_AIC23_DATAHANDLE,AIC_data.uint);//output right channel
}

Uint32 input_sample() //for 32-bit input
{
	short CHANNEL_data;

	if (poll) while(!MCBSP_rrdy(DSK6416_AIC23_DATAHANDLE));//if ready to receive
	AIC_data.uint=MCBSP_read(DSK6416_AIC23_DATAHANDLE);//read data

//Swapping left and right channels (see comments in output_sample())
	CHANNEL_data=AIC_data.channel[RIGHT]; //swap left and right channel
	AIC_data.channel[RIGHT]=AIC_data.channel[LEFT];
	AIC_data.channel[LEFT]=CHANNEL_data;

	return(AIC_data.uint);
}

short input_left_sample() //input to left channel
{
	if (poll) while(!MCBSP_rrdy(DSK6416_AIC23_DATAHANDLE));//if ready to receive
	AIC_data.uint=MCBSP_read(DSK6416_AIC23_DATAHANDLE);//read into left channel
	return(AIC_data.channel[LEFT]); //return left channel data
}

short input_right_sample() //input to right channel
{
	if (poll) while(!MCBSP_rrdy(DSK6416_AIC23_DATAHANDLE));//if ready to receive
	AIC_data.uint=MCBSP_read(DSK6416_AIC23_DATAHANDLE);//read into right channel
	return(AIC_data.channel[RIGHT]); //return right channel data
}