![Damien George](/assets/img/avatar_default.png)
The default protection for the BLE ringbuf is to use MICROPY_BEGIN_ATOMIC_SECTION, which disables all interrupts. On stm32 it only needs to disable the lowest priority IRQ, pendsv, because that's the IRQ level at which the BLE stack is driven.
The default protection for the BLE ringbuf is to use MICROPY_BEGIN_ATOMIC_SECTION, which disables all interrupts. On stm32 it only needs to disable the lowest priority IRQ, pendsv, because that's the IRQ level at which the BLE stack is driven.