From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sat, 30 Jul 2016 16:45:42 +0000 (+0200)
Subject: Make a better error message on LIBUSB_ERROR_NOT_FOUND.
X-Git-Tag: 0.5.1~1
X-Git-Url: https://git.sesse.net/?p=bmusb;a=commitdiff_plain;h=05831781fb79ec7436280ccef6ef0fdabf105f33

Make a better error message on LIBUSB_ERROR_NOT_FOUND.
---

diff --git a/bmusb.cpp b/bmusb.cpp
index 5fda217..7f62a19 100644
--- a/bmusb.cpp
+++ b/bmusb.cpp
@@ -1105,6 +1105,11 @@ void BMUSBCapture::configure_card()
 	rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/1);
 	if (rc < 0) {
 		fprintf(stderr, "Error setting alternate 1: %s\n", libusb_error_name(rc));
+		if (rc == LIBUSB_ERROR_NOT_FOUND) {
+			fprintf(stderr, "This is usually because the card came up in USB2 mode.\n");
+			fprintf(stderr, "In particular, this tends to happen if you boot up with the\n");
+			fprintf(stderr, "card plugged in; just unplug and replug it, and it usually works.\n");
+		}
 		exit(1);
 	}
 	rc = libusb_set_interface_alt_setting(devh, /*interface=*/0, /*alternate_setting=*/2);