Matrix user forums

When using the UART RX interrupt I see the following message during compilation:

In function '_U1RXInterrupt':
coff-cc1.exe: warning: _U1RXInterrupt PSV model not specified for '_U1RXInterrupt';
assuming 'auto_psv' this may affect latency

Not sure if this is significant or not as the interrupt works fine.

Hello,

You can safely ignore the warning. It's just saying that interrupts are assigned vectors automatically. If you assign your own vectors then the latency (the time from interrupt being triggered to your interrupt macro being called) may be very slightly decreased or at least can be reordered so the highest priority interrupt has the lowest latency, but this is a very advanced feature which most users will not require.