Fixes#147
* Can vary tick rate from 100Hz via configTICK_RATE_HZ. Note that the
SDK binary libraries are hard-coded to assume the tick rate is 100Hz,
so changing the tick rate may have unexpected consequences for lower
layer WiFi behaviour (such as certain kinds of timeouts happening
faster/slower.)
* Setting configCPU_CLOCK_HZ to 160MHz means ESP will set 160MHz during
initialisation. Only 80MHz and 160MHz are supported.
* Timing of tasks is no longer affected by current CPU freq (whether set
via configCPU_CLOCK_HZ or via sdk_system_update_cpu_freq().)
Previously doubling the CPU frequency would double the tick rate.
In case of heap corruption or some other major problem, dumping details
in the exception handler can cause a crash loop - so fail out if we seem
to be going in circles.
This commits adds JSON support by adding Jsmn
(http://zserge.com/jsmn.html), a minimalistic JSON parser.
Signed-off-by: Drasko DRASKOVIC <drasko.draskovic@gmail.com>
Also reduces the IRAM footprint of the fatal exception handler, as only
the prelude (which disables interrupts & enables the flash mapping) is
in IRAM now.
Closes#54, relevant to #133.
Relies on global flags set when the user ISR is executing.
Unclear if this fixes any bugs as ISR code may not have been calling
into LWIP, but the previous implementation was broken.
newlib-xtensa revision cbe80794ed0083
This fixes a crash caused by heap operations occuring inside
ISRs. Particularly noticeable when sending a lot of network
traffic. Probably fixes#119, maybe other crashing bugs.
Configure/compile steps same as previous:
../configure --with-newlib --enable-multilib
--disable-newlib-io-c99-formats --enable-newlib-supplied-syscalls
--enable-target-optspace
--program-transform-name="s&^&xtensa-lx106-elf-&"
--disable-option-checking --with-target-subdir=xtensa-lx106-elf
--target=xtensa-lx106-elf
--prefix=/home/gus/dev/esp/rtos/open-rtos/libc/
--enable-newlib-nano-malloc --enable-newlib-nano-formatted-io --enable-newlib-reent-small --prefix=path_to/esp-open-rtos/libc
CROSS_CFLAGS="-DSIGNAL_PROVIDED -DABORT_PROVIDED" make
make install
This saves 1020 bytes from the text (IRAM) section by preventing
inlining of user_start_phase2() (and dump_flash_config_sectors() as
well) into the IRAM function sdk_user_start().
