板子突然变得起不来了,示波器测量0.9V, 1.5V, 1.8V, 3.3V均在范围内,24M晶振波形也有。
上电时序方面,只对0.9V做了控制,3.3V使能0.9V输出。
板子上电后,调试串口只输出这四行就没了。
[348]HELLO! BOOT0 is starting!
[352]BOOT0 commit : 88480af-dirty
[356]set pll start
[358]fix vccio detect value:0xc0
如果按复位键,则只输出前三行。
也无法重新烧录程序。
烧录时,串口信息如下:
[348]HELLO! BOOT0 is starting!
[352]BOOT0 commit : 88480af-dirty
[356]set pll start
[358]fix vccio detect value:0xc0
[9191]fes begin commit:88480af-dirty
[9195]set pll start
最近编辑记录 Gentlepig (昨天 17:04:26)
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You can avoid using BOOT0 by using xboot. This would help you debug your issue better. Also with xboot you can bypass uboot and jump directly to the kernel.
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