Re: [ts-7000] Re: Reading GPIO ports

[Matt Godbolt <>]

tate = *PBDR;
> while (!(state & 0x01)) {
> state = *PBDR;
> }
>
> printf("boo\n");
> }
>

Your delay is unlikely the pins. It's more likely to be the IO.
You might want to try to flush the io buffer after each printf:
"fflush(stdout);"

Hi there, I tried all manner of IO flushing, ioctl()s, etc (including flashing the LEDs on the circuit board) and none of that helped - even without flushing it wouldn't have missed some of the edges as my experiments suggested, it would have just bunched them up until the printfs() got flushed. 

I'm still not sure what was going on,  but writing kernel-level drivers has obviated the issue.  In fact, if anyone is interested in either a /dev/lcd driver (a patch to lcdmod), or a driver to act on interrupts on a DIO pin from an infra-red detector (I have a driver to lirc), let me know.

Thanks to those who helped - one day I will revisit this user-mode issue and try and work out what it was, but until then I'm happy in kernel-space.

Thanks,

Matt
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