ESP32 SPI Flash detection

kyklas
Posts: 3
Joined: Thu Mar 15, 2018 5:07 pm

ESP32 SPI Flash detection

Postby kyklas » Thu Mar 15, 2018 5:14 pm

Hi,

I have a ESP32-WROOM-32 module. It is solder on a breakout board and correctly power from a step down regulator.
I have been using the module for development, testing my code.

I recently run into SPI flash detection issue. The SPI flash comes up once after a long period not powered and then nothing.

Code: Select all

ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371 
ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_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:0x3fff0018,len:4
load:0x3fff001c,len:5576
load:0x40078000,len:0
ho 12 tail 0 room 4
load:0x40078000,len:13744
entry 0x40078fc0
I (31) boot: ESP-IDF v3.1-dev-288-gdaa8cfa8-dirty 2nd stage bootloader
I (31) boot: compile time 21:15:44
I (32) boot: Enabling RNG early entropy source...
I (37) boot: SPI Speed      : 40MHz
I (41) boot: SPI Mode       : DIO
I (45) boot: SPI Flash Size : 4MB
I (49) boot: Partition Table:
I (53) boot: ## Label            Usage          Type ST Offset   Length
I (60) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (68) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (75) boot:  2 factory          factory app      00 00 00010000 00100000
I (83) boot: End of partition table

< Continues boot ........ >

ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371 
ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371 
Anyone are facing a similar issue ? randomly working spi flash on esp32 ?

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