setting up a libusb log level accordingly to verbosity.

include/stlink.h

@@ -168,8 +168,8 @@ typedef struct flash_loader {
         size_t sram_size;	// stlink_chipid_params.sram_size, set by stlink_load_device_params()
 
         // bootloader
-	// sys_base and sys_size are not used by the tools, but are only there to 
-	// download the bootloader code (see tests/sg.c)
+        // sys_base and sys_size are not used by the tools, but are only there to
+        // download the bootloader code (see tests/sg.c)
         stm32_addr_t sys_base;	// stlink_chipid_params.bootrom_base, set by stlink_load_device_params()
         size_t sys_size;  // stlink_chipid_params.bootrom_size, set by stlink_load_device_params()
 
@@ -243,6 +243,7 @@ typedef struct flash_loader {
 #include "stlink/chipid.h"
 #include "stlink/flash_loader.h"
 #include "stlink/version.h"
+#include "stlink/logging.h"
 
 #ifdef __cplusplus
 }

include/stlink/logging.h

@@ -18,6 +18,7 @@ enum ugly_loglevel {
 
 int ugly_init(int maximum_threshold);
 int ugly_log(int level, const char *tag, const char *format, ...);
+int ugly_libusb_log_level(enum ugly_loglevel v);
 
 #define UGLY_LOG_FILE (strstr(__FILE__, "/") != NULL ? \
     strrchr(__FILE__, '/')  + 1 : strstr(__FILE__, "\\") != NULL ? \

src/logging.c

@@ -54,3 +54,24 @@ int ugly_log(int level, const char *tag, const char *format, ...) {
     va_end(args);
     return 1;
 }
+
+
+/*
+ *  Log message levels.
+ *  - LIBUSB_LOG_LEVEL_NONE (0)    : no messages ever printed by the library (default)
+ *  - LIBUSB_LOG_LEVEL_ERROR (1)   : error messages are printed to stderr
+ *  - LIBUSB_LOG_LEVEL_WARNING (2) : warning and error messages are printed to stderr
+ *  - LIBUSB_LOG_LEVEL_INFO (3)    : informational messages are printed to stderr
+ *  - LIBUSB_LOG_LEVEL_DEBUG (4)   : debug and informational messages are printed to stderr
+*/
+int ugly_libusb_log_level(enum ugly_loglevel v)
+{
+    switch (v) {
+    case UDEBUG: return 4;
+    case UINFO: return 3;
+    case UWARN: return 2;
+    case UERROR: return 1;
+    };
+
+    return 2;
+}

src/sg.c

@@ -936,6 +936,12 @@ static stlink_t* stlink_open(const int verbose) {
         return NULL;
     }
 
+#if LIBUSB_API_VERSION < 0x01000106
+    libusb_set_debug(slsg->libusb_ctx, ugly_libusb_log_level(verbose));
+#else
+    libusb_set_option(slsg->libusb_ctx, LIBUSB_OPTION_LOG_LEVEL, ugly_libusb_log_level(verbose));
+#endif
+
     slsg->usb_handle = libusb_open_device_with_vid_pid(slsg->libusb_ctx, STLINK_USB_VID_ST, STLINK_USB_PID_STLINK);
     if (slsg->usb_handle == NULL) {
         WLOG("Failed to find an stlink v1 by VID:PID\n");

src/usb.c

@@ -902,6 +902,12 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, bool reset, char serial[ST
         goto on_error;
     }
 
+#if LIBUSB_API_VERSION < 0x01000106
+    libusb_set_debug(slu->libusb_ctx, ugly_libusb_log_level(verbose));
+#else
+    libusb_set_option(slu->libusb_ctx, LIBUSB_OPTION_LOG_LEVEL, ugly_libusb_log_level(verbose));
+#endif
+
     libusb_device **list;
     /** @todo We should use ssize_t and use it as a counter if > 0. As per libusb API: ssize_t libusb_get_device_list (libusb_context *ctx, libusb_device ***list) */
     int cnt = (int) libusb_get_device_list(slu->libusb_ctx, &list);