ESP32 crash on upload to SD

[haschmide]

I am using an SD card with an ESP32 - using default SPI but with custom SS pin. I can view the cards content, download files, delete files and create new directories. But as soon as I try to upload any file the ESP32 will crash:

19:55:06.068 -> Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled. 19:55:06.143 -> 19:55:06.143 -> Core 1 register dump: 19:55:06.143 -> PC : 0x400d34b3 PS : 0x00060130 A0 : 0x800d35bc A1 : 0x3ffb1f50
19:55:06.143 -> A2 : 0x00000000 A3 : 0x00000000 A4 : 0x3ffb20f4 A5 : 0x3f4166e0
19:55:06.143 -> A6 : 0x00000000 A7 : 0xff000000 A8 : 0x8015d2f0 A9 : 0x3ffb1f20
19:55:06.143 -> A10 : 0x00000001 A11 : 0x00000000 A12 : 0x00000000 A13 : 0x3ffd49bc
19:55:06.143 -> A14 : 0x00000000 A15 : 0x00000005 SAR : 0x00000017 EXCCAUSE: 0x0000001c
19:55:06.143 -> EXCVADDR: 0x00000010 LBEG : 0x400ebaac LEND : 0x400ebaf2 LCOUNT : 0x0000003c
19:55:06.333 -> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) 19:55:06.333 -> configsip: 0, SPIWP:0xee 19:55:06.333 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 19:55:06.370 -> mode:DIO, clock div:1 19:55:06.370 -> load:0x3fff0030,len:1184 19:55:06.370 -> load:0x40078000,len:13260 19:55:06.370 -> load:0x40080400,len:3028 19:55:06.370 -> entry 0x400805e4

[haschmide]

Analysis shows that it crashes on data.flush() which in this case is ESP32 WiFiClient.flush() which seems to have a known issue of an possible endless loop in there forever: https://github.com/espressif/arduino-esp32/issues/4736

Suggest trying to workaround this... for the combination here it works when removing data.flush() entirely

[xreef]

Hi haschmide, I confirm that it is the flush bug. I tried to check in the lastest version, but I prefer that the bug will be fixed instead of doing a patch on the correct code. Bye Renzo

[xreef]

esp32 core 2.0.14 fixes the problem. Thanks to all