Backtrace issue when reading ADC

[bipin_c@shoreline]

Hi all,

I am using esp32 and reading adc values using api "adc1_get_raw()".Earlier i was reading only one sample but due to some reasons, i want to read 512/1024 samples at a time and average them.i am able to take 64/128 samples and average them.as soon as i go to take 256 or more sample i start getting back trace prints.i am unable to decode this.Can anyone help me to understand why reading more than 256 samples causing the issue?what could be the issue?as far as i know.,adc read call is blocking call but not sure what could cause back trace issue.

Thanks in advance!

//////////////////////LOGS/////////////////

Backtrace:0x4013C7DE:0x3FFBE8300x40083EED:0x3FFBE850 0x4000BFED:0x3FFBBB10 0x4009551E:0x3FFBBB20 0x401370C0:0x3FFBBB40 0x400EAC79:0x3FFBBB70 0x400EB4E5:0x3FFBBBE0 0x400D5A89:0x3FFBBC00
0x4013c7de: task_wdt_isr at /home/bipin/esp/esp-idf/components/esp_system/task_wdt.c:183

0x40083eed: _xt_lowint1 at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/xtensa_vectors.S:1111

0x4009551e: vPortClearInterruptMaskFromISR at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/include/freertos/portmacro.h:571
(inlined by) vPortExitCritical at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/port.c:319

0x401370c0: adc1_get_raw at /home/bipin/esp/esp-idf/components/driver/adc_common.c:449
(inlined by) adc1_get_raw at /home/bipin/esp/esp-idf/components/driver/adc_common.c:427

0x400eac79: Temperature::read_raw() at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/temperature.hpp:231
(inlined by) Kettle::on_timer() at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/kettle.hpp:52

0x400eb4e5: Kettle::periodic_timer_callback(void*) at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/kettle.hpp:507

0x400d5a89: timer_process_alarm at /home/bipin/esp/esp-idf/components/esp_timer/src/esp_timer.c:360
(inlined by) timer_task at /home/bipin/esp/esp-idf/components/esp_timer/src/esp_timer.c:386




Backtrace:0x4008D7D9:0x3FFBEE300x40083EED:0x3FFBEE50 0x4000BFED:0x3FFD7560 0x4009551E:0x3FFD7570 0x4013CA22:0x3FFD7590 0x4013CA2F:0x3FFD75C0 0x400D3A2E:0x3FFD75E0 0x400937DC:0x3FFD7600
0x4008d7d9: esp_crosscore_isr at /home/bipin/esp/esp-idf/components/esp_system/crosscore_int.c:92

0x40083eed: _xt_lowint1 at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/xtensa_vectors.S:1111

0x4009551e: vPortClearInterruptMaskFromISR at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/include/freertos/portmacro.h:571
(inlined by) vPortExitCritical at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/port.c:319

0x4013ca22: esp_task_wdt_reset at /home/bipin/esp/esp-idf/components/esp_system/task_wdt.c:330

0x4013ca2f: idle_hook_cb at /home/bipin/esp/esp-idf/components/esp_system/task_wdt.c:80

0x400d3a2e: esp_vApplicationIdleHook at /home/bipin/esp/esp-idf/components/esp_system/freertos_hooks.c:51 (discriminator 1)

0x400937dc: prvIdleTask at /home/bipin/esp/esp-idf/components/freertos/tasks.c:3974


I (20350) Main: MME: 0 CUR T :nan ,TAR T:96.11, PID OP:-10, heat_warm_on: 0
I (21590) Main: MME: 0 CUR T :nan ,TAR T:96.11, PID OP:-10, heat_warm_on: 0
I (22820) Main: MME: 0 CUR T :nan ,TAR T:96.11, PID OP:-10, heat_warm_on: 0
I (24050) Main: MME: 0 CUR T :nan ,TAR T:96.11, PID OP:-10, heat_warm_on: 0


Backtrace:0x4013C7DE:0x3FFBE8300x40083EED:0x3FFBE850 0x4000BFED:0x3FFBBB10 0x4009551E:0x3FFBBB20 0x401370C0:0x3FFBBB40 0x400EAC79:0x3FFBBB70 0x400EB4E5:0x3FFBBBE0 0x400D5A89:0x3FFBBC00
0x4013c7de: task_wdt_isr at /home/bipin/esp/esp-idf/components/esp_system/task_wdt.c:183

0x40083eed: _xt_lowint1 at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/xtensa_vectors.S:1111

0x4009551e: vPortClearInterruptMaskFromISR at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/include/freertos/portmacro.h:571
(inlined by) vPortExitCritical at /home/bipin/esp/esp-idf/components/freertos/port/xtensa/port.c:319

0x401370c0: adc1_get_raw at /home/bipin/esp/esp-idf/components/driver/adc_common.c:449
(inlined by) adc1_get_raw at /home/bipin/esp/esp-idf/components/driver/adc_common.c:427

0x400eac79: Temperature::read_raw() at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/temperature.hpp:231
(inlined by) Kettle::on_timer() at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/kettle.hpp:52

0x400eb4e5: Kettle::periodic_timer_callback(void*) at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/kettle.hpp:507

0x400d5a89: timer_process_alarm at /home/bipin/esp/esp-idf/components/esp_timer/src/esp_timer.c:360
(inlined by) timer_task at /home/bipin/esp/esp-idf/components/esp_timer/src/esp_timer.c:386

[MicroController]

...
0x4013c7de: task_wdt_isr at /home/bipin/esp/esp-idf/components/esp_system/task_wdt.c:183
...
0x400eac79: Temperature::read_raw() at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/temperature.hpp:231
(inlined by) Kettle::on_timer() at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/kettle.hpp:52

0x400eb4e5: Kettle::periodic_timer_callback(void*) at /home/bipin/esp/fellow_language_release/EKG_Pro/firmware/main/kettle.hpp:507

0x400d5a89: timer_process_alarm at /home/bipin/esp/esp-idf/components/esp_timer/src/esp_timer.c:360
(inlined by) timer_task at /home/bipin/esp/esp-idf/components/esp_timer/src/esp_timer.c:386

You seem to be blocking the IDF's timer task for longer than the task watchdog is willing to accept. The log should reflect the corresponding reset reason.
Avoid doing lengthy operations in (timer) callbacks.

want to read 512/1024 samples at a time

Look into continuous mode.