codec_c.c

c5x中关于codec的实验

//******************************************************************************
//               		SJTU DSP Tech. Center
//       Copyright (c) 2002 SJTU DSP Tech. Center. All Rights Reserved.
//	  History:
//		Date		Authors			Changes
//		2003/08/30	Fu Xuan			Created.
//		2007/09/20	Chen Yu			Changed.
//******************************************************************************
#include "codec_c.h"

//******************************************************************************
//* MAIN
//******************************************************************************
void main()
{
	//light the LEDs for a short time
	leds_on();
	delay(1000);
	leds_off();
	delay(1000);
	
	//initialize McBSP
	init_mcbsp();
	led1_on();
	delay(1000);
	
	//initialize DMA
	init_dma();
	led2_on();
	delay(1000);
		
	//initialize CODEC control register
	init_codec();
	led3_on();
	delay(1000);
	
	//start capture and play
	input_pingpong_flag=0;
	output_pingpong_flag=0;
	dmac0_int_flag=0;
	dmac4_int_flag=0;
	
	enable_codec();
	led4_on();
	delay(1000);

	while(1)
	{	//test transmit finish
		if(dmac4_int_flag){
			dmac4_int_flag=0;
		}
		
		//test receive finish
		if(dmac0_int_flag)
		{	//here, have receive data, then process
			dmac0_int_flag=0;
						
			if(input_pingpong_flag)
				in_buf = in_data_ping;
			else
				in_buf = in_data_pong;

			if(output_pingpong_flag)
				out_buf = out_data_ping;
			else
				out_buf = out_data_pong;
			
			//do samples processing	
			processing(in_buf, out_buf, data_size);
		}
	}
}

//==================================================
void delay(s16 period)
{
    int i, j;
    
    for(i=0; i<period; i++)
    {
        for(j=0; j<period>>1; j++);
    }
}