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
Remove the paragraph about writing to the Free Software Foundation's
mailing address. The FSF has changed addresses in the past, and may do
so again. In 2021 this is not useful, let's rather have a bit less
boilerplate at the start of source files.
Change-Id: Ie0a3b2273383adbb3303faffd6ff96be7f4cae99
As reported in https://osmocom.org/issues/4335, there appear to
be some cards / use cases in which the 512 byte sized ringbuffer is
insufficient. As we do have free RAM available, we can easily
increase the buffer size, despite not entirely knowing yet why
it needs to be *that* large.
Change-Id: Ie713d614ec5b334e9058d5d430e4bb660f5b8b69
Closes: OS#4335
In commit eac1bec428 we start to use the
ringbuffer inside the console printing code. As a result, we must not
use TRACE_*() or printf() from within ringbuffer.c code to avoid
infinite recursion.
Instead, let rbuf_write() return a negative return value in case the
ring buffer overflows. This way, the callers (outside the
console/stdout code) can print an error message themselves.
Change-Id: Ib009f013be119dbad22fa2b7d60ec8dee59baee5
This way we can easily check with 'diff' for differences in our code and
Atmel softpack. Also, this layout is more suitable for building various
different firmware images (e.g. factory-test, dfu-loader, main
application) for a variety of different boards (simtrace, owhw, qmod).
