IEEE1284_ECP_FWD_TO_(3)

✨ ieee1284_ecp_fwd_to_rev, ieee1284_ecp_rev_to_fwd — ECP direction switching ✨

okay bestie, welcome to the ieee1284_ecp_fwd_to_ page (that's the manual, section 3, functions girlies only 💅). this one's short and sweet and it's literally just about flipping the direction of your parallel port when you're in ECP mode. two little functions, one big job. let's go 🦋

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🌸 SYNOPSIS 🌸

int ieee1284_ecp_fwd_to_rev(struct parport *port);

int ieee1284_ecp_rev_to_fwd(struct parport *port);

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💖 DESCRIPTION 💖

so here's the tea ☕ — these two functions are the ones you call when you need to switch directions while you're chillin' in ECP mode. that's the whole personality, no cap.

when you negotiate into ECP mode, the direction starts out as forward (which means host-to-peripheral, iykyk). so if you wanna go the other way:

• use ieee1284_ecp_fwd_to_rev to flip from forward ➡️ reverse
• use ieee1284_ecp_rev_to_fwd to flip from reverse ➡️ forward

🔄 it's giving revolving door energy, honestly.

both of them act on the parallel port that's associated with port, and — important bestie, don't skip this — that port must be claimed. must. claimed. periodt. 👑

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🎀 RETURN VALUE 🎀

here's what you might get back, and what it means:

• E1284_OK — slay! ✨ the direction switched successfully. no notes, ate and left no crumbs.
• E1284_NOTIMPL — the port doesn't have the capability you need 😭. this could be a limitation of this version of libieee1284, or it could just be a hardware limitation. either way, it's not happening.
• E1284_INVALIDPORT — the port parameter is invalid 💀 (for instance, maybe the port is not claimed — yeah, we told you).

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👑 AUTHOR 👑

• Tim Waugh <twaugh@redhat.com> — Author.

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💜 COPYRIGHT 💜

Copyright © 2001-2003 Tim Waugh

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and that's the whole page, bestie! 🫶 this one came from the IEEE1284_ECP_FWD_TO_(3) manual, dated 09/18/2007 — so yeah, she's vintage but she still hits. go forth and flip those directions responsibly 🌈⭐💅