In an ISR, it is not allowed to call a function, either directly or indirectly, that resides in .irom0.text. If you are unsure where a function is located, consult the .sym file (which can be generated from the .elf file by "xtensa-lx106-elf-gcc-nm -n").SpenZerX wrote:is it allowed to use sdk functions (os_malloc, strcpy) in interrupts (GPIO)?
Beaverton, OR, USA
In your interrupt handler, say it's an UART RX interrupt:
store the received data in a buffer and signal the task queue by calling:
system_os_post will cause the task handler you registered in system_os_task to be called 'very soon', but outside the interrupt context. In the task handler you do any lengthy processing. While your task handler is running, new interrupts may occur. The interrupt handler should be kept as short as possible. Even if it would be safe to call malloc, doing this in a ISR is bad practise. Instead pre-allocate the necessary buffer space in your user_init.
In a well designed system polling is never necessary.
It isn't. And, by the way, it isn't necessary to just blindly try something. As I mentioned you can generate a .sym file and confirm with certainty whether a particular function (SDK or otherwise) is in .irom0.text. The .sym file excerpt below, from one of my applications, clearly shows that system_os_post is not in .irom0.text. Any function listed between _irom0_text_start and _irom0_text_end is cached. If a function is listed elsewhere, it isn't cached.SpenZerX wrote:But it is an SDK Function that may be also cached from rom. I will give it a try.
Code: Select all
40100220 T pvPortMalloc
401008f0 T system_get_time
4010090c T system_os_post
40211000 A _irom0_text_start
40211008 T post_init
40211034 T zb_mainTaskAddr
40211034 T zf_Main
4023b70c A _irom0_text_end
Beaverton, OR, USA
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