codec.c

适用于TSM320C6000系列的EDMA实验原代码

/* Set up the CODEC */

int codec()
{
  	int temp = 0;

  	/* Set up control register 3 for S/W reset */
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x0386);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();

  	/* Set up control register 3 for mic input */
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x0306);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();

  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x2330);
  	temp = mcbsp0_read();
  	mcbsp0_write(0x0);
  	mcbsp0_read();
  	mcbsp0_write(0x0);
  	mcbsp0_read();

  	if((temp & 0xff) != 0x06)
  	{
  		printf ("Error in setting up register 3. %x\n", temp);
  	  	return(1);
  	}

	/* Set up control register 4 */
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x0400);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();

  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x2430);
  	temp = mcbsp0_read();
  	mcbsp0_write(0x0);
  	mcbsp0_read();
  	mcbsp0_write(0x0);
  	mcbsp0_read();
  	if((temp & 0xff) != 0x00)
  	{
    	printf ("Error in setting up register 4.\n");
    	return(1);
  	}

	/* Set up control register 5 */
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x0586);
  	mcbsp0_read();
  	mcbsp0_write(0);
  	mcbsp0_read();

  	mcbsp0_write(0);
  	mcbsp0_read();
  	mcbsp0_write(1);
  	mcbsp0_read();
  	mcbsp0_write(0x2530);
	temp = mcbsp0_read();
	mcbsp0_write(0x0);
  	mcbsp0_read();
  	mcbsp0_write(0x0);
  	mcbsp0_read();
  	if((temp & 0xfe) != 0x86)
  	{
  		printf ("Error in setting up register 5.\n");
    	return(1);
  	}

	return(0);
}