ESP32-PICO-V3-02 PSRAM test crash

[m.urbant]

Hi!

We have run into a problem with our custom ESP32-PICO-V3-02 based hw crashing on PSRAM test:

Code: Select all

I (29) boot: ESP-IDF v4.4-329-g3c9657fa4e 2nd stage bootloader
I (29) boot: compile time 11:04:59
I (29) boot: chip revision: 3
I (56) boot_comm: chip revision: 3, min. bootloader chip revision: 0
I (98) boot.esp32: SPI Speed      : 40MHz
I (126) boot.esp32: SPI Mode       : DIO
I (154) boot.esp32: SPI Flash Size : 8MB
I (182) boot: Enabling RNG early entropy source...
I (215) boot: Partition Table:
I (237) boot: ## Label            Usage          Type ST Offset   Length
I (281) boot:  0 nvs              WiFi data        01 02 00009000 00004000
I (326) boot:  1 otadata          OTA data         01 00 0000d000 00002000
I (372) boot:  2 phy_init         RF data          01 01 0000f000 00001000
I (417) boot:  3 factory          factory app      00 00 00010000 00200000
I (462) boot:  4 ota_0            OTA app          00 10 00310000 00200000
I (508) boot:  5 ota_1            OTA app          00 11 00510000 00200000
I (553) boot:  6 nvs_key          NVS keys         01 04 00710000 00001000
I (598) boot: End of partition table
I (624) boot: Defaulting to factory image
I (652) boot_comm: chip revision: 3, min. application chip revision: 0
I (695) esp_image: segment 0: paddr=00010020 vaddr=3f400020 size=33e88h (212616) map
I (823) esp_image: segment 1: paddr=00043eb0 vaddr=3ffbdb60 size=04ff8h ( 20472) load
I (831) esp_image: segment 2: paddr=00048eb0 vaddr=40080000 size=07168h ( 29032) load
I (873) esp_image: segment 3: paddr=00050020 vaddr=400d0020 size=c2bb8h (797624) map
I (1200) esp_image: segment 4: paddr=00112be0 vaddr=40087168 size=17eb0h ( 97968) load
I (1241) esp_image: segment 5: paddr=0012aa98 vaddr=50000000 size=00010h (    16) load
I (1256) boot: Loaded app from partition at offset 0x10000
I (1273) boot: Disabling RNG early entropy source...
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core  0 register dump:
PC      : 0x400d7c30  PS      : 0x00060b30  A0      : 0x800817ff  A1      : 0x3ffe3c30  
0x400d7c30: esp_spiram_test at /opt/esp/idf/components/esp_hw_support/port/esp32/spiram.c:110
A2      : 0x00000001  A3      : 0x3f800000  A4      : 0x3ff0005c  A5      : 0x50000010  
A6      : 0x0000083f  A7      : 0x00000000  A8      : 0x0001fc20  A9      : 0x00007f08  
A10     : 0x00200000  A11     : 0xaaaad5a2  A12     : 0x00000000  A13     : 0x3f811408  
A14     : 0x00000020  A15     : 0x00000000  SAR     : 0x0000001d  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x0001fc20  LBEG    : 0x4009365c  LEND    : 0x40093664  LCOUNT  : 0x00000000  
0x4009365c: __memset_aux at /builds/idf/crosstool-NG/.build/xtensa-esp32-elf/src/newlib/newlib/libc/machine/xtensa/memset.S:61
0x40093664: __memset_aux at /builds/idf/crosstool-NG/.build/xtensa-esp32-elf/src/newlib/newlib/libc/machine/xtensa/memset.S:69
Backtrace:0x400d7c2d:0x3ffe3c300x400817fc:0x3ffe3c50 0x400794dc:0x3ffe3c80  |<-CORRUPTED
0x400d7c2d: esp_spiram_test at /opt/esp/idf/components/esp_hw_support/port/esp32/spiram.c:110
0x400817fc: call_start_cpu0 at /opt/esp/idf/components/esp_system/port/cpu_start.c:445

This only crashes on about 10 devices out of 1000. The rest work fine. Also making modifications to the app code prevents ESP32 PSRAM test from crashing. If disable PSRAM test in sdkconfig then it won't crash either.

Any advice where to look into?

Thanks!