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Run hidtest for no more than 10 seconds when no hid_read data #440

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Aug 14, 2022
Merged

Run hidtest for no more than 10 seconds when no hid_read data #440

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53 changes: 33 additions & 20 deletions hidtest/test.c
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Original file line number Diff line number Diff line change
@@ -1,12 +1,13 @@
/*******************************************************
Windows HID simplification
HIDAPI - Multi-Platform library for
communication with HID devices.

Alan Ott
Signal 11 Software

8/22/2009
libusb/hidapi Team

Copyright 2009
Copyright 2022.

This contents of this file may be used by anyone
for any reason without any conditions and may be
Expand Down Expand Up @@ -179,8 +180,7 @@ int main(int argc, char* argv[])
buf[0] = 0x2;
res = hid_get_feature_report(handle, buf, sizeof(buf));
if (res < 0) {
printf("Unable to get a feature report.\n");
printf("%ls", hid_error(handle));
printf("Unable to get a feature report: %ls\n", hid_error(handle));
}
else {
// Print out the returned buffer.
Expand All @@ -197,40 +197,53 @@ int main(int argc, char* argv[])
buf[1] = 0x80;
res = hid_write(handle, buf, 17);
if (res < 0) {
printf("Unable to write()\n");
printf("Error: %ls\n", hid_error(handle));
printf("Unable to write(): %ls\n", hid_error(handle));
}


// Request state (cmd 0x81). The first byte is the report number (0x1).
buf[0] = 0x1;
buf[1] = 0x81;
hid_write(handle, buf, 17);
if (res < 0)
printf("Unable to write() (2)\n");
if (res < 0) {
printf("Unable to write()/2: %ls\n", hid_error(handle));
}

// Read requested state. hid_read() has been set to be
// non-blocking by the call to hid_set_nonblocking() above.
// This loop demonstrates the non-blocking nature of hid_read().
res = 0;
i = 0;
while (res == 0) {
res = hid_read(handle, buf, sizeof(buf));
if (res == 0)
if (res == 0) {
printf("waiting...\n");
if (res < 0)
printf("Unable to read()\n");
#ifdef _WIN32
}
if (res < 0) {
printf("Unable to read(): %ls\n", hid_error(handle));
break;
}

i++;
if (i >= 10) { /* 10 tries by 500 ms - 5 seconds of waiting*/
printf("read() timeout\n");
break;
}

#ifdef _WIN32
Sleep(500);
#else
#else
usleep(500*1000);
#endif
#endif
}

printf("Data read:\n ");
// Print out the returned buffer.
for (i = 0; i < res; i++)
printf("%02x ", (unsigned int) buf[i]);
printf("\n");
if (res > 0) {
printf("Data read:\n ");
// Print out the returned buffer.
for (i = 0; i < res; i++)
printf("%02x ", (unsigned int) buf[i]);
printf("\n");
}

hid_close(handle);

Expand Down