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what's the cause of exception reset 28 with epc1=0x4000df2f?
Posted:
Fri Aug 16, 2019 10:18 amby esp8266_abc
Very occationally, the ESP8266 module would reset with below bootup print:
Fatal exception (28):
epc1=0x4000df2f, epc2=0x00000000, epc3=0x00000000,
excvaddr=0x00000033, depc=0x00000000
What might be the cause?
Thanks!
Re: what's the cause of exception reset 28 with epc1=0x4000d
Posted:
Sun Aug 18, 2019 6:18 pmby davydnorris
A 28 error is caused by trying to read memory that you're not allowed to for some reason. Could be that you're going off the end of a memory location somewhere
Re: what's the cause of exception reset 28 with epc1=0x4000d
Posted:
Wed Aug 21, 2019 10:01 amby eriksl
The memory addressed is 0x0000007, which indeed cannot be read (zero page) and certainly not word aligned.
The offending code is at 0x4000df2f, if you can find the symbols in your code, you can debug the relevant code.
Re: what's the cause of exception reset 28 with epc1=0x4000d
Posted:
Mon Aug 26, 2019 5:12 amby esp8266_abc
Thanks!