Flashing issue on module with 8MB PSRAM #1289
Replies: 7 comments 12 replies
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seems to be a hardware issue: either the hardware is not supported or defective (external RAM on module)! |
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I got exactly the same logs and problems on two boards of those: |
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If it is written to be 8MB of PSRAM, it is not always inside. |
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You are right ... checking for PSRAM these boards don't even have 2MB. When I check the PSRAM it reports a total of 0! WTF! |
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The ones I have do have an 8mb psram chip on board, but I’m not sure whether or not it is really 8 mb or a mislabeled chip. When I get home I’ll check to see what it reads as It does seem like this is a problem with the boards themselves and not the program after all. I bought mine from AliExpress as well. |
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I also have several from Aliexpress, but they all work fine. |
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Hi @caco3, could you send a link to the items you ordered. |
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The article seems no longer to be available (which is normal on Ali). The images look the same, but of course this does not need to mean anything! |
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Since writing this, I've ordered another, from ebay this time. Unfortunately, it is also an 8MB psram that doesn't work (8mb according to the numbers engraved on the PSRAM chip - the listing said it was only 4) Same 6404L-3SQR psram, same error. If anyone manages to find a reliable seller, please tell me. |
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What does this mean? |
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Up to 4MB of RAM the esp32 can handle as if would be internal (malloc, ...). If you want to access more you need to use memory bank switching throug himem. |
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Thanks! I quickly added the example to our project to test my devices. They all only have 4 MB PSRAM. |
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So is it correct to say that this problem is due to something unusual/non-functional with these boards? RE: point 1: I've tried esptool.py, the espressif flasher, and the web browser based flasher (and both a board made to flash ESP32s and a USB to serial adapter). I want to buy a standard 4MB one somewhere but that's what I explicitly did with this new one, and it turned out to be an 8MB one anyway. |
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As @jomjol explained, it is ok to have 8MB. We just are only using 4 MB. If the 8 MB one does not work, this IMO means:
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The Problem
After flashing the firmware, nothing appears to happen. I found a similar issue, but the person reporting it could not even get output from the serial console, whereas I was able to (below)
This is occurring with two separately packaged ESP32-S boards, from the same seller. They appeared to work to some degree when first plugged in (the front light would turn on)
Serial output
Rebooting... ets Jul 29 2019 12:21:46rst:0xc (SW_CPU_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:2
load:0x3fff0030,len:7568
load:0x40078000,len:15360
load:0x40080400,len:3744
entry 0x4008067c
I (27) boot: ESP-IDF 4.3.2 2nd stage bootloader
I (27) boot: compile time 17:20:48
I (27) boot: chip revision: 3
I (30) boot_comm: chip revision: 3, min. bootloader chip revision: 0
I (37) boot.esp32: SPI Speed : 40MHz
I (42) boot.esp32: SPI Mode : DIO
I (46) boot.esp32: SPI Flash Size : 4MB
I (51) boot: Enabling RNG early entropy source...
I (56) boot: Partition Table:
I (60) boot: ## Label Usage Type ST Offset Length
I (67) boot: 0 nvs WiFi data 01 02 00009000 00004000
I (74) boot: 1 otadata OTA data 01 00 0000d000 00002000
I (82) boot: 2 phy_init RF data 01 01 0000f000 00001000
I (89) boot: 3 ota_0 OTA app 00 10 00010000 001db000
I (97) boot: 4 ota_1 OTA app 00 11 001f0000 001db000
I (104) boot: End of partition table
I (109) boot_comm: chip revision: 3, min. application chip revision: 0
I (116) esp_image: segment 0: paddr=00010020 vaddr=3f400020 size=4df30h (319280) map
I (247) esp_image: segment 1: paddr=0005df58 vaddr=3ffb0000 size=020c0h ( 8384) load
I (250) esp_image: segment 2: paddr=00060020 vaddr=400d0020 size=15e00ch (1433612) map
I (801) esp_image: segment 3: paddr=001be034 vaddr=3ffb20c0 size=029f8h ( 10744) load
I (806) esp_image: segment 4: paddr=001c0a34 vaddr=40080000 size=1c1f4h (115188) load
I (856) esp_image: segment 5: paddr=001dcc30 vaddr=50000000 size=00010h ( 16) load
I (871) boot: Loaded app from partition at offset 0x10000
I (871) boot: Disabling RNG early entropy source...
I (883) psram: This chip is ESP32-D0WD
E (883) psram: PSRAM ID read error: 0xffffffff
E (883) cpu_start: Failed to init external RAM!
Re-enable cpu cache.
abort() was called at PC 0x40082dcf on core 0
Backtrace:0x40082c65:0x3ffe3ba0 0x4008f70d:0x3ffe3bc0 0x40096991:0x3ffe3be0 0x40082dcf:0x3ffe3c50 0x4007956d:0x3ffe3c80 |<-CORRUPTED
ELF file SHA256: 28356ed42df4c694
Version
12.0.1
Expected Behavior
The ESP module starts up and begins connecting to wifi
Screenshots
No response
Additional Context
Flashed using a purpose built 'mb' board from the seller.
Markings on the camera connector: TY OV2640-v1.0
On the PSRAM: AP MEMORY / 6404L - 3SQR / 12205 / 150047G
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