ESP8266 Community Forum

- Thu Apr 21, 2016 11:04 pm #45974 It is critical to my application that I can toggle an I/O about every 80 ms.
But when I connect to wifi as a station , there is a short period (about 1s) where the CPU seems to be stucked in an interrupt routine. This is happening after the second "scandone" message:

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 26288, room 16
tail 0
chksum 0x10
load 0x3ffe8000, len 944, room 8
tail 8
chksum 0x32
load 0x3ffe83b0, len 2476, room 0
tail 12
chksum 0xee
csum 0xee
OS SDK ver: 1.4.0(c599790) compiled @ Feb 26 2016 11:08:14
�q+P�*��Ej��n=�phy ver: 762, pp ver: 10.4

mode : sta(5c:cf:7f:11:b9:73)
add if0
f r0, WiFi: Connecting to WiFi
scandone
f 0, scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 11
pm open phy_2,type:2 0 0
cnt
connected with laflaulac, channel 1
dhcp client start...


During that time, no instruction execution is possible.

I switched to the rtos SDK 1.4 and still have the issue even if my I/O toggler task is set to the top priority.

Anybody has an idea of what is happenning ?

- Fri May 20, 2016 12:25 pm #47721 I still need help on this one.
I hope that it will be fixed in the next SDK.

Anybody experienced something like this ?

- Sat May 21, 2016 1:09 am #47750 if you need just toggle in time, you may use dma with some pattern.then it can toggle io independent of cpu in exact time.