process_data_2.c

所用板ADSP-BF561 EZ-KIT Lite

#include "..\include\exercise_2.h"

#include "..\include\process_data_2.h"

short volume=32767;					// using a float variable in this example

void reduce_volume()
{
	volume *= REDUCE_FACTOR>>15;		// reduce volume if larger than min.
	if (volume < MIN_VOLUME)
		volume = MIN_VOLUME;
}

void increase_volume()
{
	volume *= INCREASE_FACTOR>>15;		// increase volume if smaller than max.
	volume = volume << 1;//x2
	if (volume > MAX_VOLUME)
		volume = MAX_VOLUME;
}

void process_data()
{
	sDAC1L = sADC2L*volume>>15;
 	sDAC2R = sADC2R*volume>>15;
	sDAC1L = sADC1L*volume>>15;
	sDAC1R = sADC1R*volume>>15;

}