commit 92c44c572e407d7cf0f572a2b46fee49da7a0c98
author Harald Welte <laforge@osmocom.org> Wed Nov 16 10:48:54 2022 +0100
committer laforge <laforge@osmocom.org> Sat Nov 19 09:02:23 2022 +0000
tree f0679f042c6c236469e8950d895752100115f5c9
parent 4237c99fa230886fd109940b62eb208c4be02ccf

firmware/sniffer: Add + use 16bit ringbuffer

So far, we use a uint8_t ring buffer as "FIFO" between USART Rx
interrupt and main context.  That's fine for expressing the bytes we
receive.  However, if we also want to report USART errors synchronously
in that stream, we actually need more bits to express those.

Reporting USART errors via the ring buffer is the only way how the
sniffer code can know in which TPDU the error occurred.  Reporting them
any other way (global variable, ...) would loose the timing relationship
where in the received stream the error occurred.

This change just changes the ringbuffer from 1024-entry 8bit to
512-entry 16bit and doesn't add any error reporting.

Change-Id: Ifde054fbfe7f753b61e7d3409c56eca6e0faeb4b