Use --tty/-T on command line to specify target device

[fw/altos] / ao-tools / lib / cp-usb-async.c

diff --git a/ao-tools/lib/cp-usb-async.c b/ao-tools/lib/cp-usb-async.c
index 6539394b541a95ec4c2761d75d7a9c739e253048..3e75b5079a793a73c316ba1bc3e4c3e428dee5c3 100644 (file)
--- a/ao-tools/lib/cp-usb-async.c
+++ b/ao-tools/lib/cp-usb-async.c
@@ -60,6 +60,7 @@ cp_usb_async_open(void)
                                                     0x10c4, 0xea60);
        cp->ack = -1;
        if (!cp->handle) {
+               fprintf(stderr, "Cannot find USB device 10c4:ea60\n");
                libusb_exit(cp->ctx);
                free(cp);
                return NULL;