allow tusb_init() to call multiple times

enhance nrf5x

1 files changed, 8 insertions, 0 deletions

diff --git a/src/tusb.c b/src/tusb.c
index dd3be72e4..fde29c24f 100644
--- a/src/tusb.c
+++ b/src/tusb.c
@@ -41,8 +41,14 @@
 #include "tusb.h"

 #include "device/usbd_pvt.h"

 

+static bool _initialized = false;

+

+

 tusb_error_t tusb_init(void)

 {

+  // skip if already initialized

+  if (_initialized) return TUSB_ERROR_NONE;

+

   VERIFY( tusb_hal_init(), TUSB_ERROR_FAILED ) ; // hardware init

 

 #if MODE_HOST_SUPPORTED

@@ -53,6 +59,8 @@ tusb_error_t tusb_init(void)
   TU_ASSERT_ERR ( usbd_init() ); // device stack init

 #endif

 

+  _initialized = true;

+

   return TUSB_ERROR_NONE;

 }