SPIFFS + IRremote = Guru Meditation Error

[matbks]

Hi,

SPIFFS.h and IRremote.h are not working together.

When the ESP32 run the following line it crashes:

server.on("/jquery.min.js", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(SPIFFS, "/jquery.min.js", "text/javascript");

BUT, it only happens if i use the following line in my setup:

irrecv.enableIRIn();

irrecv.enableIRIn(); Begin the receiving process. This will enable the timer interrupt which consumes a small amount of CPU every 50 µs. (according library's owner)

from

#include <IRremote.h>

i found the following on IRremote libraries (IRrecv.cpp)

void  IRrecv::enableIRIn ( )
{
// Interrupt Service Routine - Fires every 50uS
#ifdef ESP32
	// ESP32 has a proper API to setup timers, no weird chip macros needed
	// simply call the readable API versions :)
	// 3 timers, choose #1, 80 divider nanosecond precision, 1 to count up
	timer = timerBegin(1, 80, 1);
	timerAttachInterrupt(timer, &IRTimer, 1);
	// every 50ns, autoreload = true
	timerAlarmWrite(timer, 50, true);
	timerAlarmEnable(timer);
#else
	cli();
	// Setup pulse clock timer interrupt
	// Prescale /8 (16M/8 = 0.5 microseconds per tick)
	// Therefore, the timer interval can range from 0.5 to 128 microseconds
	// Depending on the reset value (255 to 0)
	TIMER_CONFIG_NORMAL();
	// Timer2 Overflow Interrupt Enable
	TIMER_ENABLE_INTR;
	TIMER_RESET;
	sei();  // enable interrupts

Looks like SPIFFS and IRremote can't work together. idk if it's something to do with Timer.
I saved the error and decoded it. Follows:

DECODED ERROR:

Decoding stack results
0x400dd11c: IRTimer() at C:\Users\mateu\Documents\Arduino\libraries\ESP32-IRremote\IRremote.cpp line 131
0x40082561: spi_flash_read at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spi_flash/flash_ops.c line 537
0x400e76d6: esp_partition_read at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spi_flash/partition.c line 242
0x400eb6dd: spiffs_api_read at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spiffs/spiffs_api.c line 36
0x400ef873: spiffs_phys_rd at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spiffs/spiffs/src/spiffs_cache.c line 161
0x400ecfe3: spiffs_obj_lu_find_entry_visitor at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spiffs/spiffs/src/spiffs_nucleus.c line 166
0x400eeb5e: spiffs_object_find_object_index_header_by_name at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spiffs/spiffs/src/spiffs_nucleus.c line 1694
0x400ec4d8: SPIFFS_stat at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spiffs/spiffs/src/spiffs_hydrogen.c line 765
0x400eb0bc: vfs_spiffs_stat at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/spiffs/esp_spiffs.c line 536
0x400e4ba1: esp_vfs_stat at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/vfs/vfs.c line 492
0x400e6911: stat at ../../../.././newlib/libc/syscalls/sysstat.c line 12
0x400d4a22: VFSImpl::open(char const*, char const*) at C:\Users\mateu\Documents\Arduino\hardware\espressif\esp32\libraries\FS\src\vfs_api.cpp line 41
0x400d400a: SPIFFSImpl::exists(char const*) at C:\Users\mateu\Documents\Arduino\hardware\espressif\esp32\libraries\SPIFFS\src\SPIFFS.cpp line 42
0x4016e0c6: fs::FS::exists(char const*) at C:\Users\mateu\Documents\Arduino\hardware\espressif\esp32\libraries\FS\src\FS.cpp line 199
0x400d413b: fs::FS::exists(String const&) at C:\Users\mateu\Documents\Arduino\hardware\espressif\esp32\libraries\FS\src\FS.cpp line 204
0x400d6965: AsyncWebServerRequest::send(fs::FS&, String const&, String const&, bool, std::function ) (C:\Program Files at x86)\Arduino\libraries\ESPAsyncWebServer-master\src\WebRequest.cpp line 771
0x400d2149: std::_Function_handler   >::_M_invoke(const std::_Any_data &,  ) at C:\Users\mateu\Documents\Arduino\WifiLoginIR/WifiLoginIR.ino line 181
0x400d8f75: AsyncCallbackWebHandler::handleRequest(AsyncWebServerRequest*) at c:\users\mateu\documents\arduino\hardware\espressif\esp32\tools\xtensa-esp32-elf\xtensa-esp32-elf\include\c++\5.2.0/functional line 2271
0x400d6bf1: AsyncWebServerRequest::_parseLine() (C:\Program Files at x86)\Arduino\libraries\ESPAsyncWebServer-master\src\WebRequest.cpp line 576
0x400d6cb5: AsyncWebServerRequest::_onData(void*, unsigned int) (C:\Program Files at x86)\Arduino\libraries\ESPAsyncWebServer-master\src\WebRequest.cpp line 121
0x400d6f1d: std::_Function_handler   >::_M_invoke(const std::_Any_data &,  ,  ,  ,  ) (C:\Program Files at x86)\Arduino\libraries\ESPAsyncWebServer-master\src\WebRequest.cpp line 75
0x400d9d4d: AsyncClient::_recv(tcp_pcb*, pbuf*, signed char) at c:\users\mateu\documents\arduino\hardware\espressif\esp32\tools\xtensa-esp32-elf\xtensa-esp32-elf\include\c++\5.2.0/functional line 2271
0x400d9dc9: AsyncClient::_s_recv(void*, tcp_pcb*, pbuf*, signed char) (C:\Program Files at x86)\Arduino\libraries\AsyncTCP-master\src\AsyncTCP.cpp line 1144
0x400da356: _async_service_task(void*) (C:\Program Files at x86)\Arduino\libraries\AsyncTCP-master\src\AsyncTCP.cpp line 145
0x40088685: vPortTaskWrapper at /Users/ficeto/Desktop/ESP32/ESP32/esp-idf-public/components/freertos/port.c line 143

ERROR:

05:35:37.214 -> PC      : 0x400dd11c  PS      : 0x00060034  A0      : 0x40081800  A1      : 0x3ffbe7a0  
05:35:37.214 -> A2      : 0x00000001  A3      : 0x00000002  A4      : 0x000000ff  A5      : 0x4008b3fc  
05:35:37.214 -> A6      : 0x00000000  A7      : 0x00000001  A8      : 0x8008133c  A9      : 0x3ff5f024  
05:35:37.214 -> A10     : 0x3ffbec3c  A11     : 0x20000000  A12     : 0x00000400  A13     : 0x3ffce6b0  
05:35:37.248 -> A14     : 0x00000026  A15     : 0x3ffc2b68  SAR     : 0x00000017  EXCCAUSE: 0x00000007  
05:35:37.248 -> EXCVADDR: 0x00000000  LBEG    : 0x400014fd  LEND    : 0x4000150d  LCOUNT  : 0xfffffffc  
05:35:37.248 -> Core 1 was running in ISR context:
05:35:37.248 -> EPC1    : 0x40082564  EPC2    : 0x00000000  EPC3    : 0x00000000  EPC4    : 0x400dd11c
05:35:37.248 -> 
05:35:37.248 -> Backtrace: 0x400dd11c:0x3ffbe7a0 0x400817fd:0x3ffbe7c0 0x40082561:0x3ffce6f0 0x400e76d6:0x3ffce760 0x400eb6dd:0x3ffce790 0x400ef873:0x3ffce7c0 0x400ecfe3:0x3ffce7f0 0x400eeb5e:0x3ffce830 0x400ec4d8:0x3ffce870 0x400eb0bc:0x3ffce8a0 0x400e4ba1:0x3ffce900 0x4000bcc5:0x3ffce920 0x400e6911:0x3ffce940 0x400d4a22:0x3ffce960 0x400d400a:0x3ffce9e0 0x4016e0c6:0x3ffcea20 0x400d413b:0x3ffcea40 0x400d6965:0x3ffcea60 0x400d2149:0x3ffceab0 0x400d8f75:0x3ffceb00 0x400d6bf1:0x3ffceb40 0x400d6cb5:0x3ffceb80 0x400d6f1d:0x3ffcebc0 0x400d9d4d:0x3ffcebe0 0x400d9dc9:0x3ffcec20 0x400da356:0x3ffcec40 0x40088685:0x3ffcec70

I am using:
ESP32 DEV KIT
WINDOWS 10 64b

libraries:
#include <WiFi.h>
#include "SPIFFS.h"
#include "ESPAsyncWebServer.h"
#include <ArduinoOTA.h>
#include <IOXhop_FirebaseESP32.h>
#include <IRremote.h>

context:
Its an ESP32 webserver offline.
When the user conects to the AcessPoint it can see a page through browser, this page contains a JavaScript code that allows me to get some information from the user throw text boxes.
To use JavaScript in this code without WiFi conection i need to bring it with the ESP32 throw SPIFFS.
This project also use a Infrared LED to comunicate with other devices.
So i can't afford not using Infrared libraries or SPIFFS library.

[stickbreaker]

Which Guru mediation error? If it is "cache region accessed but cache disabled" look at the code of IRTimer() see if it is small enough to fit in IRAM and is not marked IRAM.

Chuck.

[matbks]

Yes thats the errror. I've tried just writing IRAM_ATTR bettwen voind and onTimer() {} but didnt work, idk if thats just as simple as that, if it is, didnt work.
Thank you.

[atanisoft]

@matbks with a 50 microsecond interval on the timer ISR and auto-reload you won't be able to access SPIFFS (or flash for that matter) anytime the IR code is "active". You have two options:

1. Move the web content to static blobs compiled in the code and serve them from there.
2. disable the IR code BEFORE calling request->send(SPIFFS, "/jquery.min.js", "text/javascript"); and re-enable it AFTER that request is complete.

Also note that though the comment claims a 50 nanosecond interval it is actually using a 50 microsecond interval based on the divider (default APB clock used by the HW timers is 80Mhz).

[matbks]

@atanisoft I appreciate your help.
Could you please tell me how to disable IR, cause as far as I know there is only this enable function.
Thanks again.

[atanisoft]

As I don't use that library or know anything about it I'm not sure how to help on it.

This is also not the first time someone has had a problem with this particular library and SPIFFS access.

[MorpheusDe97]

Hello @matbks, this worked for me:
I implemented a disableIRIn-Function that calls the reverse functions of the enableIRIn()-Function. Maybe not the most elegant way, but at least it worked on my side.

void IRrecv::disableIRIn() { // Initialize state machine variables irparams.rcvstate = STATE_IDLE; irparams.rawlen = 0; timerEnd(timer); timerAlarmDisable(timer); timerDetachInterrupt(timer); }

[matbks]

@MorpheusDe97 Thank you so much!
I am going to try this.
I ended up using https://github.com/markszabo/IRremoteESP8266 that is now working on esp32 and i haven't look up the library yet but i does not cause the crash and actually recognizes lots of protocols.
Anyway, i am going to try your code and post here if i was able to enable and disable irrecv with sucess.
Thank you again!

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