Problems accessing flash memory

[Dimych]

Are there any check functions before using the read / write / erase functions of flash memory?

The code crashes periodically. I don't see any patterns. Maybe at the start, or maybe after half an hour of work. I read / write to 1 sector of flash memory every 10 seconds 16 bytes. And I get errors ...

idf: 4.2.2
ic: esp32-pico-v3-02

This crash occurred on the esp_partition_read function.

Code: Select all

I (367027) EVENT LOG: read page[0]
Re-enable cpu cache.
Guru Meditation Error: Core  0 panic'ed (Cache disabled but cached memory region accessed).

Core  0 register dump:
PC      : 0x4000c2e2  PS      : 0x00060134  A0      : 0x800972c6  A1      : 0x3ffe9890
A2      : 0x3ffedac4  A3      : 0x3ff42080  A4      : 0x00000040  A5      : 0x3ffedac4
A6      : 0xffffffff  A7      : 0x00000004  A8      : 0x00000000  A9      : 0x3ffe9880
A10     : 0x00000001  A11     : 0x3ffce3a8  A12     : 0x00000001  A13     : 0x3ffbedcc
A14     : 0x3ffc2acc  A15     : 0x00000001  SAR     : 0x00000020  EXCCAUSE: 0x00000007
EXCVADDR: 0x00000000  LBEG    : 0x4000c2e0  LEND    : 0x4000c2f6  LCOUNT  : 0x00000003

Backtrace:0x4000c2df:0x3ffe9890 0x400972c3:0x3ffe98a0 0x40097643:0x3ffe98e0 0x400989d3:0x3ffe9900 0x4008be3a:0x3ffe9920 0x40142307:0x3ffe9950 0x400fc059:0x3ffe9980 0x400fc1e1:0x3ffe99e0 0x400fbd5e:0x3ffe9a00 0x400fa95d:0x3ffe9aa0 0x400fa0c5:0x3ffe9d30 0x4010df7a:0x3ffe9d50 0x40110d15:0x3ffe9d70 0x40125261:0x3ffe9db0 0x401264ab:0x3ffe9dd0
0x400972c3: spi_flash_ll_get_buffer_data at C:/esp/esp-idf/components/soc/src/esp32/include/hal/spi_flash_ll.h:146

0x40097643: spi_flash_hal_read at C:/esp/esp-idf/components/soc/src/hal/spi_flash_hal_common.inc:122

0x400989d3: spi_flash_chip_generic_read at C:/esp/esp-idf/components/spi_flash/spi_flash_chip_generic.c:155

0x4008be3a: esp_flash_read at C:/esp/esp-idf/components/spi_flash/esp_flash_api.c:557

0x40142307: esp_partition_read at C:/esp/esp-idf/components/spi_flash/partition.c:412

Maybe there is a way to do some kind of check before reading?

Code: Select all

const esp_partition_t * partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_ANY, "events");
    assert(partition != NULL);

    uint8_t * read_data = (uint8_t*) malloc(SPI_FLASH_SEC_SIZE);
    if (read_data == NULL) {
        ESP_LOGE(EVENT_LOG_TAG, "error memory"); 
        return -1;
    }

        #ifdef ENABLED_EVENT_LOG
            ESP_LOGI(EVENT_LOG_TAG, "read page[%d]", i);
        #endif
        // Прочитать блок по адресу
        if (esp_partition_read(partition, i * SPI_FLASH_SEC_SIZE, read_data, SPI_FLASH_SEC_SIZE) == ESP_OK)
        {
        
        } 

[biterror]

Is it possible that some interrupt is triggered while you are reading the FLASH and the interrupt code is not locked in RAM and it's unable to load the code from FLASH?

[Dimych]

I disabled my code, leaving only the read flash function. added attribute IRAM_ATTR to the function.
The error still persists. I cannot control the code in WIFI and BLE. It is possible that read operations are performed there.

It turns out that you cannot use a flash, in principle, when WIFI is working?

[ESP_Sprite]

Are you using psram?

[Dimych]

yes, i use psram
if you use the flash no more than 30 seconds, then I see no errors (test for several hours).

sometimes crashes when writing to nvs..

Code: Select all

Guru Meditation Error: Core  0 panic'ed (Cache disabled but cached memory region accessed)
Core 0 register dump:
PC      : 0x400967bc  PS      : 0x00060334  A0      : 0x800839e4  A1      : 0x3ffbe350
0x400967bc: xQueueReceiveFromISR at C:/esp/esp-idf/components/freertos/queue.c:1622 (discriminator 1)

A2      : 0x3f8006ec  A3      : 0x00000000  A4      : 0x3ffbe390  A5      : 0xbad00bad
A6      : 0x3ff47024  A7      : 0x00000000  A8      : 0x8008c641  A9      : 0x3ffbe350
A10     : 0x00000000  A11     : 0x3ffb31d0  A12     : 0x00000655  A13     : 0x3f4049d4
A14     : 0x40087c80  A15     : 0x3ffed4d4  SAR     : 0x0000001f  EXCCAUSE: 0x00000007
0x40087c80: r_lld_evt_schedule at ??:?

EXCVADDR: 0x00000000  LBEG    : 0x40090efc  LEND    : 0x40090f18  LCOUNT  : 0xffffffff
0x40090efc: memcpy at /builds/idf/crosstool-NG/.build/HOST-x86_64-w64-mingw32/xtensa-esp32-elf/src/newlib/newlib/libc/machine/xtensa/memcpy.S:175

0x40090f18: memcpy at /builds/idf/crosstool-NG/.build/HOST-x86_64-w64-mingw32/xtensa-esp32-elf/src/newlib/newlib/libc/machine/xtensa/memcpy.S:197

Core 0 was running in ISR context:
EPC1    : 0x4008c4c1  EPC2    : 0x00000000  EPC3    : 0x00000000  EPC4    : 0x400967bc
0x4008c4c1: timer_overflow_happened at C:/esp/esp-idf/components/esp32/esp_timer_esp32.c:149

0x400967bc: xQueueReceiveFromISR at C:/esp/esp-idf/components/freertos/queue.c:1622 (discriminator 1)


ELF file SHA256: a804289d8acdc373

Backtrace: 0x400967b9:0x3ffbe350 0x400839e1:0x3ffbe370 0x4008c962:0x3ffbe390 0x4008ccf4:0x3ffbe3d0 0x4008c8fa:0x3ffbe410 0x4008466d:0x3ffbe430 0x40088091:0x3ffbe450 0x40085022:0x3ffbe490 0x4008a4ee:0x3ffbe4b0 0x4008af9f:0x3ffbe4d0 0x400841b5:0x3ffbe4f0 0x4009b37b:0x3ffed380 0x4009bae9:0x3ffed3a0 0x4009b89b:0x3ffed3c0 0x4009b5bd:0x3ffed400 0x4009babb:0x3ffed430 0x4008c149:0x3ffed460 0x4008c1b5:0x3ffed4b0 0x40146823:0x3ffed4d0 0x4014685e:0x3ffed500 0x401468f5:0x3ffed520 0x4014758a:0x3ffed560 0x40145467:0x3ffed580 0x40145a6a:0x3ffed600 0x4014796f:0x3ffed670 0x4014502f:0x3ffed690 0x400e456b:0x3ffed6c0 0x400e511d:0x3ffed760 0x400e08e0:0x3ffed780 0x400d7e71:0x3ffed7a0 0x400dab65:0x3ffed7c0 0x400df26e:0x3ffed840 0x400dd58b:0x3ffed880
0x400967b9: xQueueReceiveFromISR at C:/esp/esp-idf/components/freertos/queue.c:1622 (discriminator 1)

0x400839e1: semphr_take_from_isr_wrapper at C:/esp/esp-idf/components/esp_wifi/esp32/esp_adapter.c:263

0x4008c962: coex_bb_reset_unlock at ??:?

0x4008ccf4: coex_core_request at ??:?

0x4008c8fa: coex_bt_request at ??:?

0x4008466d: coex_bt_request_wrapper at C:/esp/esp-idf/components/bt/controller/bt.c:1041

0x40088091: r_lld_evt_schedule at ??:?

0x40085022: r_ea_finetimer_isr at ??:?

0x4008a4ee: r_rwbt_isr at ??:?

0x4008af9f: r_rwbtdm_isr_wrapper at intc.c:?

0x400841b5: _xt_lowint1 at C:/esp/esp-idf/components/freertos/xtensa_vectors.S:1153

0x4009b37b: spi_flash_hal_host_idle at C:/esp/esp-idf/components/soc/src/hal/spi_flash_hal_iram.c:66

0x4009bae9: spi_flash_generic_wait_host_idle at C:/esp/esp-idf/components/spi_flash/spi_flash_chip_generic.c:247

0x4009b89b: spi_flash_chip_generic_wait_idle at C:/esp/esp-idf/components/spi_flash/spi_flash_chip_generic.c:269

0x4009b5bd: spi_flash_chip_generic_set_write_protect at C:/esp/esp-idf/components/spi_flash/spi_flash_chip_generic.c:216

0x4009babb: spi_flash_chip_generic_write at C:/esp/esp-idf/components/spi_flash/spi_flash_chip_generic.c:192

0x4008c149: esp_flash_write at C:/esp/esp-idf/components/spi_flash/esp_flash_api.c:617

0x4008c1b5: spi_flash_write at C:/esp/esp-idf/components/spi_flash/esp_flash_api.c:757

0x40146823: nvs::Page::alterEntryState(unsigned int, nvs::Page::EntryState) at C:/esp/esp-idf/components/nvs_flash/src/nvs_page.cpp:723

0x4014685e: nvs::Page::writeEntry(nvs::Item const&) at C:/esp/esp-idf/components/nvs_flash/src/nvs_page.cpp:108

0x401468f5: nvs::Page::copyItems(nvs::Page&) at C:/esp/esp-idf/components/nvs_flash/src/nvs_page.cpp:482

0x4014758a: nvs::PageManager::requestNewPage() at C:/esp/esp-idf/components/nvs_flash/src/nvs_pagemanager.cpp:177

0x40145467: nvs::Storage::writeMultiPageBlob(unsigned char, char const*, void const*, unsigned int, nvs::VerOffset) at C:/esp/esp-idf/components/nvs_flash/src/nvs_storage.cpp:180

0x40145a6a: nvs::Storage::writeItem(unsigned char, nvs::ItemType, char const*, void const*, unsigned int) at C:/esp/esp-idf/components/nvs_flash/src/nvs_storage.cpp:292
 (inlined by) nvs::Storage::writeItem(unsigned char, nvs::ItemType, char const*, void const*, unsigned int) at C:/esp/esp-idf/components/nvs_flash/src/nvs_storage.cpp:248

0x4014796f: nvs::NVSHandleSimple::set_blob(char const*, void const*, unsigned int) at C:/esp/esp-idf/components/nvs_flash/src/nvs_handle_simple.cpp:52
 (inlined by) nvs::NVSHandleSimple::set_blob(char const*, void const*, unsigned int) at C:/esp/esp-idf/components/nvs_flash/src/nvs_handle_simple.cpp:47

0x4014502f: nvs_set_blob at C:/esp/esp-idf/components/nvs_flash/src/nvs_api.cpp:400

[ESP_Sprite]

A problem possibly may be that the memory for the malloc is allocated in PSRAM; I don't know if the esp_partition_read code has guards for that. You could try using heap_alloc_caps to always allocate internal memory there and see if the problem goes away.