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--- products:sbc:edge2:hardware:boot-sequence [2022/08/29 02:36]
hyphop [SPL loader]
+++ products:sbc:edge2:hardware:boot-sequence [2022/08/29 02:56]
hyphop
@@ Line 58: / Line 58: @@
 ==== U-Boot OS boot sequence ====
+<WRAP important >
+We discribe only about SPI-flash u-boot, for other custom U-boots which can stored at eMMC or SD its will be different
+</WRAP>
+OS booting follow by ''distro_bootcmd'' which use ''boot_targets'' priority for scanning bootable OS. Step by step scan all available storage's and partitions for [[#os-boot-configuration-extlinux-config]]
+```shell
+kedge2# printenv boot_targets
+boot_targets=usb0 mmc1 mmc0 pxe dhcp fail
+```
 WIP:
+==== OS boot configuration - extlinux config ====
 ===== OOWOW mode =====
+OOWOW mode can be activated by
+  * special on board short-cuts ''FUNCTION'' + ''RESET''
+  * under running OS via special [[#MCU-register-for-start-oowow]] - software way
 WIP:
 ==== OOWOW special mode ====
@@ Line 70: / Line 90: @@
 ==== OOWOW rescue mode ====
+WIP:
+==== MCU register for start oowow ====
 WIP:

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