Fix pi cow debug compilation

[bill88t]

It now compiles with DEBUG=1.

[bill88t]

If the uint32_t doesn't work, I will revert it later. I will test it with debug anyways.

[bill88t]

Now, the lwip_src folder is completely unused. And ping_time is captured.

I will probably do a cleanup commit and then test the changes on some real hardware.
Converting to draft till done.

[bill88t]

Ljinux raspberry_pi_pico_w 0.3.6-dev 01/01/2020 00:00:07 circuitpython Ljinux

[board@ljinux| ~]> modprobe driver_wifi as network
API: 12.2
Data: RaspberryPi.PicoW
Compiler: 1.29.4
ClmImport: 1.47.1
Customization: v5 22/06/24
Creation: 2022-06-24 06:55:08
[board@ljinux| ~]> iwctl --passphrase "[REDACTED]" station wifi connect Pi400
[board@ljinux| ~]> ping feline.gr
PING feline.gr (95.216.7.161) data.
ping: send 95.216.7.161
ping: recv 95.216.7.161 81 ms
PING from feline.gr: icmp_seq=1 time=83.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 81 ms
PING from feline.gr: icmp_seq=2 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 82 ms
PING from feline.gr: icmp_seq=3 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 82 ms
PING from feline.gr: icmp_seq=4 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 82 ms
PING from feline.gr: icmp_seq=5 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 82 ms
PING from feline.gr: icmp_seq=6 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 82 ms
PING from feline.gr: icmp_seq=7 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 81 ms
PING from feline.gr: icmp_seq=8 time=82.0 ms
ping: send 95.216.7.161
ping: recv 95.216.7.161 81 ms
PING from feline.gr: icmp_seq=9 time=82.0 ms
^C
--- feline.gr ping statistics ---
9 packets transmitted, 9 received, 0 lost
rtt min/avg/max/mdev = 82.0/82.1/83.0/0.3 ms
[board@ljinux| ~]> 

The

API: 12.2
Data: RaspberryPi.PicoW
Compiler: 1.29.4
ClmImport: 1.47.1
Customization: v5 22/06/24
Creation: 2022-06-24 06:55:08

and

ping: send 95.216.7.161
ping: recv 95.216.7.161 81 ms

lines are the debug lines

[bill88t]

Now it doesn't build without debug..

[bill88t]

I have retested, and this is ready to go.

[jepler]

@tannewt want to review this as a way to stick your toes in the pico w waters?

[tannewt]

Give me a bit more time before I touch LWIP stuff. (So I'll pass.)

[jepler]

Thanks. I am still not 100% confident about the way ping_time is used across two source files (Radio.c and ping.c), whether they need to be the same or whether they need to be different; but your logs seem to show that it "works now".

A note for the future: Because I don't know a single thing about your "ljinux" environment -- and the majority of reviewers won't either -- it is more difficult for me to analyze and understand what I am seeing, compared to just seeing Python code. If in the future you can show Python code instead, I do not have to guess and possibly make wrong assumptions about what you are actually demonstrating. Just something to keep in mind that could help us communicate better together.