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added cmd related functions

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David Schleef 2001-05-28 02:36:03 +00:00
parent 7616ab0880
commit 64b3584ff7
1 changed files with 90 additions and 0 deletions
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lib/cmd.c Normal file
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#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>
#include <math.h>
#include <sys/time.h>
#include <string.h>
int comedi_get_cmd_src_mask(comedi_t *it,unsigned int s,comedi_cmd *cmd)
{
memset(cmd,0,sizeof(*cmd));
cmd->subdev = s;
cmd->flags = 0;
cmd->start_src = TRIG_ANY;
cmd->scan_begin_src = TRIG_ANY;
cmd->convert_src = TRIG_ANY;
cmd->scan_end_src = TRIG_ANY;
cmd->stop_src = TRIG_ANY;
return comedi_command_test(it,cmd);
}
int comedi_get_cmd_generic_timed(comedi_t *it,unsigned int s,comedi_cmd *cmd)
{
int ret;
ret = comedi_get_cmd_src_mask(it,s,cmd);
if(ret<0)return ret;
if(cmd->start_src&TRIG_NOW){
cmd->start_src=TRIG_NOW;
cmd->start_arg=0;
}else if(cmd->start_src&TRIG_FOLLOW){
cmd->start_src=TRIG_FOLLOW;
cmd->start_arg=0;
}
/* hmmm... don't know what to do */
return -1;
}
if(cmd->convert_src&TRIG_TIMER){
if(cmd->scan_begin_src&TRIG_FOLLOW){
cmd->convert_src = TRIG_TIMER;
cmd->scan_begin_src = TRIG_FOLLOW;
}else{
cmd->convert_src = TRIG_TIMER;
cmd->scan_begin_src = TRIG_TIMER;
}
}else{
//printf("can't do timed?!?\n");
return -1;
}
cmd->scan_end_src = TRIG_COUNT;
cmd->scan_end_arg = 1;
if(cmd->stop_src&TRIG_COUNT){
cmd->stop_src=TRIG_COUNT;
cmd->stop_arg=2;
}else if(cmd->stop_src&TRIG_NONE){
cmd->stop_src=TRIG_NONE;
cmd->stop_arg=0;
}else{
printf("can't find a good stop_src\n");
return -1;
}
cmd->chanlist_len = 1;
ret=comedi_command_test(it,cmd);
if(ret==3){
/* good */
ret=comedi_command_test(it,cmd);
}
if(ret==4 || ret==0){
return 0;
}
return -1;
}