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21 lines
973 B
Rust
21 lines
973 B
Rust
#![no_std]
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use panic_probe as _;
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// same panicking *behavior* as `panic-probe` but doesn't print a panic message
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// this prevents the panic message being printed *twice* when `defmt::panic` is invoked
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#[defmt::panic_handler]
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fn panic() -> ! {
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unsafe {
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// turn off the USB D+ pull-up before pausing the device with a breakpoint
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// this disconnects the nRF device from the USB host so the USB host won't attempt further
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// USB communication (and see an unresponsive device). probe-run will also reset the nRF's
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// USBD peripheral when it sees the device in a halted state which has the same effect as
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// this line but that can take a while and the USB host may issue a power cycle of the USB
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// port / hub / root in the meantime, which can bring down the probe and break probe-run
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const USBD_USBPULLUP: *mut u32 = 0x4002_7504 as *mut u32;
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USBD_USBPULLUP.write_volatile(0)
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}
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cortex_m::asm::udf()
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}
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