What's the meaning of the boot header lines, i.e. CONFIGSIP and SPIWP ?

[cyberman54]

On different ESP32 boards with same application code i see different boot messages when powering up the device:

Code: Select all

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

rst:0x1 (POWERON_RESET),boot:0x33 (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

What's the meaning of these messages, i.e. "configsip" and "SPIWP"?
Is there any documentation on those?

[WiFive]

It is a typo it should be configspi and it is reading the efuse settings for spi flash pins

[ESP_igrr]

WiFive is right, this is the value of flash pins read from EFUSE. WP is the WP pin number (or 0xee, if WP is not overridden), read from flash image header.
I think "sip" was actually not a typo, i.e. the intended use of this EFUSE was to configure flash pins in SIPs.

[WiFive]

It's possible but confusing since it is called spiconfig everywhere else (eg ets_efuse_get_spiconfig)

[ESP_igrr]

ets_efuse_get_spiconfig

Ah right, then it might indeed be a typo!

[ESP_Angus]

There's some more information about this boot output on the esptool wiki:
https://github.com/espressif/esptool/wi ... eader-info