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--- products:sbc:vim1s:hardware:vim1s-boot-flow [2023/03/07 01:41]
hyphop [OOWOW mode]
+++ products:sbc:vim1s:hardware:vim1s-boot-flow [2023/06/05 07:56]
hyphop [OOWOW boot led indication]
@@ Line 21: / Line 21: @@
 More detail: [[./interfaces#hardware-buttons]]
+====== OOWOW boot led indication ======
+OOWOW boot makes a red LED indication on the first boot seconds, it's looks like a short RED blinking 1-3 sec in success,
+<WRAP important >
+Red blink or permanent red LED means OOWOW failed
+</WRAP>
+<WRAP tip >
+This indication common for VIM4, Edge2 and VIM1S
+</WRAP>
+```shell Preparing for oowow
+# red led hb mode
+i2c mw 0x18 0x89 3
+```
+```shell try to start
+# red led off
+i2c mw 0x18 0x89 0
+```
+```shell oowow fail
+# red led on mode
+i2c mw 0x18 0x89 1
+```
+=== dev-info ===
+WIP: special pre-boot led indication
+```shell ~/khadas/vim1s/fenix/build/u-boot/board/khadas/configs$ grep -m1 PREBOOT kvim1s.h -A12
+#define CONFIG_PREBOOT  \
+	"run mcu_fan; " \
+	"run mcu_oowow_mode_chk; " \
+	"run led_mcu_on; " \
+	"run bcb_cmd; " \
+	"run upgrade_check;" \
+	"run init_display;" \
+	"run storeargs;" \
+	"run led_mcu_off; " \
+	"run upgrade_key;" \
+	"run switch_bootmode; " \
+	"run mcu_fan_off; "
+#else
+```
+```shell uboot led
+kvim1s# printenv led_mcu_on
+led_mcu_on=kbi led systemon w on
+kvim1s# printenv led_mcu_off
+led_mcu_off=kbi led systemon w off
+```
 ====== OOWOW mode  ======
-Exclusive special service mode:
+Exclusive special service mode: activated [[#hardware-buttons|by hardware buttons]] or [[#set-oowow-mode|by software request]]
 <WRAP important >

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