David Thacher

icon location Most projects are now kept private. Note most of my code bases are proof of concepts. The code could be left a complete trainwreck.

Results 23 comments of David Thacher

printf deadlock usb using two tasks

I looked into it some. ``` Core 1 goes for stdio_usb_mutex and gets it. Core 0 goes for stdio_usb_mutex but only gets spin lock. Core 0 goes for portGET_ISR_LOCK or...

printf deadlock usb using two tasks

@kilograham FreeRTOS did not define xPortLockInternalSpinUnlockWithBestEffortWaitOrTimeout. This was defined by the SDK? Which make it optional correct? I mean I already suspect this based on trying to compile with it...

printf deadlock usb using two tasks

I argue they are atomic. The problem is they deadlock using two blocking (atomic) operations when split. You need to force serialization which should create the desired atomic. This means...