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RMT standard example RMT_LED_Blink crashes #11281

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Area: LibrariesIssue is related to Library support. Status: SolvedThe issue has been resolved and requires no further action. Type: ExampleIssue is related to specific example.
Milestone
@fanfanlatulipe26

Description

Board

ESP32 Dev Kit v1

Device Description

nothing

Hardware Configuration

nothing
Using the builtin LED on pin 2

Version

v3.2.0

IDE Name

Arduino IDE 1.8.19

Operating System

Windows

Flash frequency

80Mhz

PSRAM enabled

no

Upload speed

921600

Description

In fact I use esp32 3.2.0 but with a patched file core/esp32/esp32-hal-rmt.c (PR #11203 )
The test craches after some blinks.

Sketch

The exact example provided with ESP32 Arduino distribution. Not line changed.

Debug Message

ets Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4888
load:0x40078000,len:16516
load:0x40080400,len:4
load:0x40080404,len:3476
entry 0x400805b4
[ 17][D][esp32-hal-cpu.c:263] setCpuFrequencyMhz(): PLL: 480 / 2 = 240 Mhz, APB: 80000000 Hz
=========== Before Setup Start ===========
Chip Info:
------------------------------------------
 Model : ESP32
 Package : D0WD-Q6
 Revision : 1.00
 Cores : 2
 CPU Frequency : 240 MHz
 XTAL Frequency : 40 MHz
 Features Bitfield : 0x00000032
 Embedded Flash : No
 Embedded PSRAM : No
 2.4GHz WiFi : Yes
 Classic BT : Yes
 BT Low Energy : Yes
 IEEE 802.15.4 : No
------------------------------------------
INTERNAL Memory Info:
------------------------------------------
 Total Size : 374904 B ( 366.1 KB)
 Free Bytes : 334240 B ( 326.4 KB)
 Allocated Bytes : 33560 B ( 32.8 KB)
 Minimum Free Bytes: 328456 B ( 320.8 KB)
 Largest Free Block: 110580 B ( 108.0 KB)
------------------------------------------
Flash Info:
------------------------------------------
 Chip Size : 4194304 B (4 MB)
 Block Size : 65536 B ( 64.0 KB)
 Sector Size : 4096 B ( 4.0 KB)
 Page Size : 256 B ( 0.2 KB)
 Bus Speed : 80 MHz
 Bus Mode : QIO
------------------------------------------
Partitions Info:
------------------------------------------
 nvs : addr: 0x00009000, size: 20.0 KB, type: DATA, subtype: NVS
 otadata : addr: 0x0000E000, size: 8.0 KB, type: DATA, subtype: OTA
 app0 : addr: 0x00010000, size: 1280.0 KB, type: APP, subtype: OTA_0
 app1 : addr: 0x00150000, size: 1280.0 KB, type: APP, subtype: OTA_1
 spiffs : addr: 0x00290000, size: 1408.0 KB, type: DATA, subtype: SPIFFS
 coredump : addr: 0x003F0000, size: 64.0 KB, type: DATA, subtype: COREDUMP
------------------------------------------
Software Info:
------------------------------------------
 Compile Date/Time : Apr 23 2025 13:49:50
 Compile Host OS : windows
 ESP-IDF Version : v5.4.1-1-g2f7dcd862a-dirty
 Arduino Version : 3.2.0
------------------------------------------
Board Info:
------------------------------------------
 Arduino Board : ESP32_DEV
 Arduino Variant : esp32
 Arduino FQBN : esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=default,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=debug,EraseFlash=none,ZigbeeMode=default
============ Before Setup End ============
Starting Blink testing...
===> rmtInit OK! Tick = 2.5us - OK for testing
======================================
All set. Starting RMT testing Routine.
======================================
===> rmtWriteLooping() to Blink the LED.
Blinking at 1s on + 1s off :: 3 blinks
===> rmtWrite() (Blocking Mode) to Blink the LED.
Blinking at 500ms on + 500ms off :: 4 blinks
===> rmtWriteAsync() (Non-Blocking Mode) to Blink the LED.
Blinking at 250ms on + 250ms off :: 5 blinks
Blinking OFF for 1 seconds
End of Mixed Calls testing
===============================
Starting a Blinking sequence...
===============================
=========== After Setup Start ============
INTERNAL Memory Info:
------------------------------------------
 Total Size : 374904 B ( 366.1 KB)
 Free Bytes : 330144 B ( 322.4 KB)
 Allocated Bytes : 37096 B ( 36.2 KB)
 Minimum Free Bytes: 324360 B ( 316.8 KB)
 Largest Free Block: 110580 B ( 108.0 KB)
------------------------------------------
GPIO Info:
------------------------------------------
 GPIO : BUS_TYPE[bus/unit][chan]
 -------------------------------------- 
 1 : UART_TX[0]
 2 : RMT_TX
 3 : UART_RX[0]
============ After Setup End =============
Using RMT Async Writing and its Completion to blink an LED.
Blinking at 1s on + 1s off :: 5 blinks
Blinking at 500ms on + 500ms off :: 5 blinks
Blinking at 250ms on + 250ms off :: 5 blinks
Blinking OFF for 1 seconds
Using RMT Writing loop to blink an LED.
Blinking at 1s on + 1s off :: 3 blinks
Blinking at 500ms on + 500ms off :: 5 blinks
Blinking at 250ms on + 250ms off :: 10 blinks
Blinking OFF for 2 seconds
Using RMT Writing and its Completion to blink an LED.
Blinking at 1s on + 1s off :: 2 blinks
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x40084582 PS : 0x00060f30 A0 : 0x80084640 A1 : 0x3ffb2100 
A2 : 0x3ffb8e9c A3 : 0x3ffb8e9c A4 : 0x61a861a8 A5 : 0x0000000f 
A6 : 0x3ffb92b8 A7 : 0x00000000 A8 : 0x00000010 A9 : 0x00000000 
A10 : 0x3ff5683c A11 : 0x3ff56800 A12 : 0x00000000 A13 : 0x00000000 
A14 : 0x00000040 A15 : 0x3ffb9388 SAR : 0x00000020 EXCCAUSE: 0x0000001c 
EXCVADDR: 0x00000018 LBEG : 0x40086480 LEND : 0x40086496 LCOUNT : 0xffffffff 
Backtrace: 0x4008457f:0x3ffb2100 0x4008463d:0x3ffb2120 0x40084756:0x3ffb2150 0x400e0b79:0x3ffb2180 0x400d22a2:0x3ffb21d0 0x400d2332:0x3ffb2210 0x400d1b11:0x3ffb2230 0x400d1c59:0x3ffb2250 0x400d3290:0x3ffb2270 0x40089895:0x3ffb2290
ELF file SHA256: 9ac58ff70
Rebooting...
ets Jun 8 2016 00:22:57

Other Steps to Reproduce

Fail in the main loop.
It seems that each function allone is OK ( RMT_Write_Aync_Non_Blocking_Blink(); / RMT_Loop_Write_Blink(); /RMT_Single_Write_Blocking_Blink();)
But when executed one after each other in a row there is a crash.
Trace:


PC: 0x40084582
EXCVADDR: 0x00000018
Decoding stack results
0x4008457f: rmt_tx_mark_eof at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp_driver_rmt/src/rmt_tx.c line 636
0x4008463d: rmt_encode_check_result at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp_driver_rmt/src/rmt_tx.c line 674
0x40084756: rmt_tx_do_transaction at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp_driver_rmt/src/rmt_tx.c line 753
0x400e0b79: rmt_transmit at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp_driver_rmt/src/rmt_tx.c line 594
0x400d22a2: _rmtWrite at C:\Users\Francis\AppData\Local\Arduino15\packages\esp32\hardware\esp323円.2.0\cores\esp32\esp32-hal-rmt.c line 347
0x400d2332: rmtWrite at C:\Users\Francis\AppData\Local\Arduino15\packages\esp32\hardware\esp323円.2.0\cores\esp32\esp32-hal-rmt.c line 405
0x400d1b11: RMT_Single_Write_Blocking_Blink() at C:\Users\Francis\AppData\Local\Temp\arduino_modified_sketch_770913/RMT_LED_Blink.ino line 281
0x400d1c59: loop() at C:\Users\Francis\AppData\Local\Temp\arduino_modified_sketch_770913/RMT_LED_Blink.ino line 358
0x400d3290: loopTask(void*) at C:\Users\Francis\AppData\Local\Arduino15\packages\esp32\hardware\esp323円.2.0\cores\esp32\main.cpp line 74
0x40089895: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/port.c line 139

I have checked existing issues, online documentation and the Troubleshooting Guide

  • I confirm I have checked existing issues, online documentation and Troubleshooting guide.

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Area: LibrariesIssue is related to Library support. Status: SolvedThe issue has been resolved and requires no further action. Type: ExampleIssue is related to specific example.

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