Hello,
Thanx to the help of gregkh I've figured out that the feature reports
I tried to generate are generating an EPIPE, which is a babble, which
means that I'm babbeling. Which is true.
The feature description says that I should send two bytes in a feature
report. According to the specifications of the device, sending (0x01,
0x00) in the report should result in the Max X coordinate being
returned in the feature report.
If I look at the data that is submitted in hid_submit_out, it contains
the values I've set.
However, sending the report itself ends with an EPIPE.
>From the BeOS developer I've heard that the report should also include
the report_id. Is that true, and, if so, is that automatically added?
(I was unsuccesful in following usb_submit_urb into the quadruple
indirection it contains).
I've attached the code that sets the two entries in the report, maybe
I'm overlooking something simple...
Thanx a lot,
EJ
FEATURE(2)[FEATURE]
Field(0)
Physical(Digitizers.Stylus)
Usage(2)
Digitizers.003f
Digitizers.0040
Logical Minimum(0)
Logical Maximum(255)
Report Size(8)
Report Count(2)
Report Offset(0)
Flags( Variable Absolute )
/* Get the report information first */
memset(&rinfo, 0, sizeof(rinfo));
memset(&uref, 0, sizeof(uref));
rinfo.report_id = 2;
rinfo.report_type = HID_REPORT_TYPE_FEATURE;
if ((retval = ioctl(fd, HIDIOCGREPORTINFO, &rinfo)) < 0)
goto error;
fprintf(stdout, "Report (%d,%d)\n", rinfo.report_type,rinfo.report_id);
if (get_report(fd, &rinfo)<0)
goto error;
/* Get the first usage, and then set it to cmd */
uref.report_type = rinfo.report_type;
uref.report_id = rinfo.report_id;
uref.field_index = 0;
uref.usage_index = 0;
if (get_usage(fd, &uref)<0)
goto error;
fprintf(stdout, "Report (%d,%d)\n", uref.report_type,uref.report_id);
uref.value = cmd;
if (set_usage(fd, &uref)<0)
goto error;
/* Get and set the second usage */
uref.usage_index = 1;
if (get_usage(fd, &uref)<0)
goto error;
uref.value = arg;
if (set_usage(fd, &uref)<0)
goto error;
/* Finalize the report */
if (set_report(fd, &rinfo)<0)
goto error;
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