From e13e7f54cb7fcc107fc16ac2493ba2eade391a5d Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Sat, 9 Jul 2016 16:26:41 +0200
Subject: [PATCH] libusb: parse -u 11:22:33 as USB path

---
 port/libusb/main.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/port/libusb/main.c b/port/libusb/main.c
index 6e17e6f6b..a6822f733 100644
--- a/port/libusb/main.c
+++ b/port/libusb/main.c
@@ -92,12 +92,36 @@ void hal_led_toggle(void){
 }
 
 
+#define USB_MAX_PATH_LEN 7
 int main(int argc, const char * argv[]){
 
+    uint8_t usb_path[USB_MAX_PATH_LEN];
+    int usb_path_len = 0;
+    if (argc >= 3 && strcmp(argv[1], "-u") == 0){
+        // parse command line options for "-u 11:22:33"
+        const char * port_str = argv[2];
+        printf("Specified USB Path: ");
+        while (1){
+            char * delimiter;
+            int port = strtol(port_str, &delimiter, 16);
+            usb_path[usb_path_len] = port;
+            usb_path_len++;
+            printf("%02x ", port);
+            if (!delimiter) break;
+            if (*delimiter != ':') break;
+            port_str = delimiter+1;
+        }
+        printf("\n");
+    }
+
 	/// GET STARTED with BTstack ///
 	btstack_memory_init();
     btstack_run_loop_init(btstack_run_loop_posix_get_instance());
 	    
+    if (usb_path_len){
+        hci_transport_usb_set_path(usb_path_len, usb_path);
+    }
+
     // use logger: format HCI_DUMP_PACKETLOGGER, HCI_DUMP_BLUEZ or HCI_DUMP_STDOUT
     hci_dump_open("/tmp/hci_dump.pklg", HCI_DUMP_PACKETLOGGER);