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added antialias.c

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David Schleef 2000-06-02 21:37:40 +00:00
parent 748980971d
commit 644fca15d2
1 changed files with 75 additions and 0 deletions
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demo/antialias.c Normal file
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/*
A little output demo
*/
#include <stdio.h>
#include <comedilib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <getopt.h>
#include <ctype.h>
extern int verbose_flag;
extern int subdevice;
extern int range;
extern int channel;
extern int aref;
extern int value;
extern char *filename;
comedi_t *device;
void ao_antialias(unsigned int data);
int main(int argc, char *argv[])
{
lsampl_t data;
int ret;
#if 0
parse_options(argc,argv);
device=comedi_open(filename);
if(!device){
comedi_perror(filename);
exit(0);
}
data = value;
if(verbose_flag){
printf("writing %d to device=%s subdevice=%d channel=%d range=%d analog reference=%d\n",
data,filename,subdevice,channel,range,aref);
}
ret=comedi_data_write(device,subdevice,channel,range,aref,data);
if(ret<0){
comedi_perror(filename);
exit(0);
}
printf("%d\n",data);
#endif
ao_antialias((1000<<16)+1000);
return 0;
}
void ao_antialias(unsigned int data)
{
unsigned int hibits=data>>16;
unsigned int lobits=data&0xffff;
int i;
unsigned int acc;
acc=0;
for(i=0;i<100;i++){
acc+=lobits;
printf("%d\n",hibits+(acc>>16));
acc&=0xffff;
}
}