fix issue nrf52840 not reset properly when upgrading bootloader+sd combo

- root cause tusb_task()/cdc task is called when usb is not inited (in case of sd upgrade)
2018-12-20 00:50:14 +07:00
parent fc13287837
commit 5c38bc8957
3 changed files with 16 additions and 3 deletions
--- a/lib/sdk11/components/libraries/bootloader_dfu/bootloader.c
+++ b/lib/sdk11/components/libraries/bootloader_dfu/bootloader.c
@ -128,8 +128,9 @@ static void wait_for_events(void)
    app_sched_execute();

 #ifdef NRF52840_XXAA
-    // usb is not enabled in OTA
-    if ( !is_ota() )
+    // skip if usb is not inited ( e.g OTA / finializing sd/bootloader )
+    extern bool usb_inited(void);
+    if ( usb_inited() )
    {
      tusb_task();
      tud_cdc_write_flush();