The currently supported SAM0 MCUs (samd21, saml21, saml1x) share the
same RTC peripheral, yet each of them carries it's own copy of the RTC
driver.
Unify the drivers and move them to sam0_common.
Usually, the access to the IROM (flash) memory requires 32-bit word aligned reads. Attempts to access data in the IROM (flash) memory less than 32 bits in size triggers a LoadStoreError exception. With the exception handler from esp-open-rtos it becomes possible to access data in IROM (flash) with a size of less than 32 bits and thus to place .rodata sections in the IROM (flash).
This option complements the existing coap_opt_add_{uint,string} and even
more special-purpose functions; its implementation is trivial given the
existing static _add_opt_pkt function.
The method is useful when working with ETags (ETag, If-Match options).
Fix of #11354: Function '_write_r' of ESP32's newlibc does not write the output of function 'write(STDIO_FILENO, ...)' to the UART interface. To fix this problem, module 'newlib_syscalls_default' is now used by default. Function '_write_r' of module 'newlib_syscalls_default' uses 'stdio_write' which in turn uses 'uart_write' if module 'stdio_uart' is used which is now the default case for ESP32.
The hifive1 has only 16kB of memory. The tests tries to allocate 12
thread stacks with 1kB (default) stacksize each. The corresponding
malloc() fails for the last two threads, making the test fail silently.
Set a delay of three seconds at the beginning of the test. Otherwise,
the node will send a neighbour solicitation with a blank link local
address, it won't receive a reply, and the test will fail.
This patch is a reduced version of an earlier one, with the bare minimum
required to be able to run the test and get the release going.
Original description:
atoi() cannot detect errors. Many implementation return zero on error
and that is what was being checked here, making the "udp send" command
unable to parse integer values of zero. On top of this, the behavior on
errors does not seem to be specified in the standard (so it is not even
correct to check for zero even when zero is not an accepted value, like
for a port number).
The result of all this is that sending UDP packets of zero length (as
required by the Release Specs) was not possible.
This patch replaces atoi by strlen, which allows for robust error detection.
Sending zero length packets is possible.
