Fix ESP32-C3 development mode

[bjoernQ]

This should address the issue reported in #88

Additionally

• updated embedded-io to 0.3.1
• improve mkbindings.bat
• don't report StaDisconnected as connected anymore

[MabezDev]

Looks good to me, just a small fix to the delay impl

[ImUrX]

May I ask why StaDisconnected counted as connected before?

[jessebraham]

Still working in release for me, but using dev I'm getting an exception:

is wifi started: Ok(true)
Start Wifi Scan
[...]
Call wifi_connect
wifi_set_configuration returned Ok(())
Ok(EnumSet(Client))
wifi_connect Ok(())
Wait to get connected
Ok(true)
Wait to get an ip address
Exception 'Store/AMO access fault' mepc=420164d4, mtval=0
TrapFrame { ra: 420164c0, t0: 6080000, t1: 400015c0, t2: 3aaaa, t3: dfffffff, t4: bfffffff, t5: 80000000, t6: 80100, a0: 0, a1: 90c, a2: 33333333, a3: 4, a4: 3c0d17a8, a5: 4201bcb2, a6: deadbeef, a7: fff, s0: 3fc89150, s1: 0, s2: 7, s3: 8a4, s4: 0, s5: 3fcdf930, s6: 3fce0000, s7: fff00000, s8: 60034000, s9: 60033000, s10: 3fce0000, s11: 0, gp: 0, tp: 0, sp: 3fc890c0, pc: 420164d4, mstatus: 1881, mcause: 7, mtval: 0 }
0x4201a280
0x4201a280 - malloc
    at /Users/jesse/Work/esp-wifi/src/wifi/os_adapter.rs:843
0x4201bcc6
0x4201bcc6 - esp_wifi::wifi::os_adapter::wifi_malloc
    at /Users/jesse/Work/esp-wifi/src/wifi/os_adapter.rs:1635
0x40040ccc
0x40040ccc - r_lld_ext_adv_dynamic_aux_pti_process
    at ??:??

[bjoernQ]

Still working in release for me, but using dev I'm getting an exception:

is wifi started: Ok(true)
Start Wifi Scan
[...]
Call wifi_connect
wifi_set_configuration returned Ok(())
Ok(EnumSet(Client))
wifi_connect Ok(())
Wait to get connected
Ok(true)
Wait to get an ip address
Exception 'Store/AMO access fault' mepc=420164d4, mtval=0
TrapFrame { ra: 420164c0, t0: 6080000, t1: 400015c0, t2: 3aaaa, t3: dfffffff, t4: bfffffff, t5: 80000000, t6: 80100, a0: 0, a1: 90c, a2: 33333333, a3: 4, a4: 3c0d17a8, a5: 4201bcb2, a6: deadbeef, a7: fff, s0: 3fc89150, s1: 0, s2: 7, s3: 8a4, s4: 0, s5: 3fcdf930, s6: 3fce0000, s7: fff00000, s8: 60034000, s9: 60033000, s10: 3fce0000, s11: 0, gp: 0, tp: 0, sp: 3fc890c0, pc: 420164d4, mstatus: 1881, mcause: 7, mtval: 0 }
0x4201a280
0x4201a280 - malloc
    at /Users/jesse/Work/esp-wifi/src/wifi/os_adapter.rs:843
0x4201bcc6
0x4201bcc6 - esp_wifi::wifi::os_adapter::wifi_malloc
    at /Users/jesse/Work/esp-wifi/src/wifi/os_adapter.rs:1635
0x40040ccc
0x40040ccc - r_lld_ext_adv_dynamic_aux_pti_process
    at ??:??

Seems it ran out of memory (malloc got a null pointer) - interesting

[bjoernQ]

May I ask why StaDisconnected counted as connected before?

I have no idea - doesn't make any sense at all

[bjoernQ]

@jessebraham maybe 2df9af7 can prevent that crash you are seeing - in any case it's the right thing to do in code

[jessebraham]

I no longer get an exception, but it just prints Disconnected over and over now 😁

[bjoernQ]

It needs a few tries in dev mode ... Just Ctrl+R until it works ... Or until you get too bored

[bjoernQ]

README is now clearer about the fact that it is not really expected to work in dev-builds

There are a few other improvements here - so if it works for release builds, we should get this in

[MabezDev]

With the original changes + some notes on how build esp-wifi in release always, this LGTM.