122 lines
2.5 KiB
C
122 lines
2.5 KiB
C
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#include <stdio.h>
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#include <comedilib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <getopt.h>
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#include <ctype.h>
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#include <math.h>
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#include <sys/time.h>
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#include <string.h>
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#include "comedi_test.h"
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int test_bufconfig_without_cmd(void);
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int test_bufconfig_with_cmd(void);
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int test_bufconfig(void)
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{
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int flags;
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flags = comedi_get_subdevice_flags(device,subdevice);
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if(flags&SDF_CMD){
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return test_bufconfig_with_cmd();
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}else{
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return test_bufconfig_without_cmd();
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}
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}
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int test_bufconfig_without_cmd(void)
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{
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int ret;
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ret = comedi_get_buffer_size(device,subdevice);
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if(ret<0){
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if(errno==ENODEV){
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printf("got ENODEV, good\n");
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}else{
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printf("E: comedi_get_buffer_size: %s\n",
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strerror(errno));
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}
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}else if(ret==0){
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printf("buffer length is 0, good\n");
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}else{
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printf("E: comedi_get_buffer_size returned %d\n",ret);
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}
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return 0;
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}
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int test_bufconfig_with_cmd(void)
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{
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int ret;
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int len;
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int maxlen;
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ret = comedi_get_buffer_size(device,subdevice);
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if(ret<0){
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printf("E: comedi_get_buffer_size: %s\n",strerror(errno));
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}else{
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printf("buffer size %d\n",ret);
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}
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maxlen = comedi_get_max_buffer_size(device,subdevice);
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if(maxlen<0){
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printf("E: comedi_get_max_buffer_size: %s\n",strerror(errno));
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}else{
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printf("max buffer size %d\n",maxlen);
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}
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len=4096;
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printf("setting buffer size to %d\n",len);
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ret = comedi_set_buffer_size(device,subdevice,len);
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if(ret<0){
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printf("E: comedi_set_buffer_size: %s\n",strerror(errno));
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}else{
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printf("buffer size set to %d\n",ret);
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}
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ret = comedi_get_buffer_size(device,subdevice);
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if(ret<0){
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printf("E: comedi_get_buffer_size: %s\n",strerror(errno));
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}else{
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printf("buffer size now at %d\n",ret);
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if(ret != len){
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printf("E: buffer size didn't get set: %d (expected %d)\n",
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ret,len);
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}
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}
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len=maxlen+4096;
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printf("setting buffer size past limit, %d\n",len);
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ret = comedi_set_buffer_size(device,subdevice,len);
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if(ret<0){
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if(errno==EPERM){
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printf("got EPERM, good\n");
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}else{
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printf("E: wrong error comedi_set_buffer_size: %s",
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strerror(errno));
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}
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}else{
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printf("E: comedi_set_buffer_size: didn't get error\n");
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}
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len=maxlen;
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printf("setting buffer size to max, %d\n",len);
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ret = comedi_set_buffer_size(device,subdevice,len);
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if(ret<0){
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printf("E: comedi_set_buffer_size: %s\n",strerror(errno));
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}else{
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printf("buffer size now at %d\n",ret);
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if(ret != len){
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printf("E: buffer size didn't get set: %d (expected %d)\n",
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ret,len);
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}
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}
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return 0;
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}
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