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SourceVuESP-IDF Framework and ExamplesESP-IDFrtc_isr_register()

rtc_isr_register() function

Register a handler for specific RTC_CNTL interrupts Multiple handlers can be registered using this function. Whenever an RTC interrupt happens, all handlers with matching rtc_intr_mask values will be called.

Syntax

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Summary

Declaration

Definition

from rtc_ctrl.h:39

esp_err_t rtc_isr_register(intr_handler_t handler, void* handler_arg, uint32_t rtc_intr_mask, uint32_t flags);

Implemented in rtc_module.c:103

Arguments

Argument

Description

handler

handler function to call

handler_arg

argument to be passed to the handler

rtc_intr_mask

combination of RTC_CNTL_*_INT_ENA bits indicating the sources to call the handler for

flags

An ORred mask of the RTC_INTR_FLAG_* defines. You can pass different flags to it to realize different purpose. If 0, the interrupt will not handle anything special. If you pass `RTC_INTR_FLAG_IRAM`, means the interrupt can be triggered with cache disabled.

Return value

- ESP_OK on success - ESP_ERR_NO_MEM not enough memory to allocate handler structure - other errors returned by esp_intr_alloc

References

Code

Location

Referrer

esp_err_t rtc_isr_register(intr_handler_t handler, void* handler_arg, uint32_t rtc_intr_mask, uint32_t flags)

rtc_module.c:103

esp_err_t rtc_isr_register(intr_handler_t handler, void* handler_arg,

rtc_isr_register(rtc_brownout_isr_handler, NULL, RTC_CNTL_BROWN_OUT_INT_ENA_M, RTC_INTR_FLAG_IRAM);

esp_brownout_init()

return rtc_isr_register(fn, arg, RTC_CNTL_TOUCH_INT_ST_M, 0);

touch_sensor.c:73

touch_pad_isr_handler_register()

return rtc_isr_register(fn, arg, RTC_CNTL_TOUCH_INT_ST_M, 0);

touch_sensor.c:79

touch_pad_isr_register()

return rtc_isr_register(fn, arg, RTC_CNTL_SAR_INT_ST_M, 0);

ulp_isr_register()

Call Tree

rtc_isr_register() is called by 4 functions and calls 6 functions:

touch_pad_isr_handler_register()

touch_pad_isr_register()

esp_brownout_init()

ulp_isr_register()

rtc_isr_register()

vPortEnterCritical()

heap_caps_malloc()

vPortExitCritical()

rtc_isr_ensure_installed()

s_rtc_isr_noniram_hook()

s_rtc_isr_noniram_hook_relieve()

Data Use

rtc_isr_register() reads 1 variable and writes 4 variables:

rtc_isr_handler_::next

rtc_isr_register()

rtc_isr_handler_::mask

rtc_isr_handler_::handler

rtc_isr_handler_::handler_arg

rtc_isr_handler_::flags

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Lifecycle

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