pico_stdin: Increase sleeping time for stdin read

[pingiun]

This solve an issue where USB serial seems to hang when using a function like getchar()

[lurch]

Can you rebase against the develop branch please? (we don't accept PRs to master)

[kilograham]

can you provide an example where this hangs - how did you pick 10 rather than 1?

[pingiun]

can you provide an example where this hangs - how did you pick 10 rather than 1?

I was running this code:

#include <stdio.h>
#include "pico/stdlib.h"

int main() {
    stdio_init_all();
    while (true) {
        char c = getchar();
        if (c == 'a') {
            printf("You sent a!\n");
        } else {
            printf("You did not send a!\n");
        }
    }
    return 0;
}

When I run this code on my pico with no other changes, it will not respond to any usb serial input. I changed it to 10, but maybe a lower value will also work, I didn't do much testing on different values

[kilograham]

moving to 1.2.1 if i can reproduce

[kilograham]

does it make a difference whether you start by physically resetting the Pico, reloading via SWD or dragging a UF2?
does it make a difference if the host side terminal is connected at the time?
what host OS/terminal are you using?

[kilograham]

moving out of 1.3.0 as this isn't really reproducable (Seems to be the host stack getting into a bad state?)

see however https://forums.raspberrypi.com/viewtopic.php?f=145&t=321326

[kilograham]

closing this in favor of issue #623

[lurch]

@pingiun see that latest comment in #623 . Would you like to test if #918 fixes things for you?