C6416dskinit.c
Started by ●November 3, 2005
//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
}
