Date: Wed, 29 Jun 2005 10:55:31 +0200 From: "Norbert Koch" <NKoch@demig.de> To: <freebsd-questions@freebsd.org> Subject: uplcom a callin only device? Message-ID: <000101c57c88$4e20dc20$4801a8c0@ws-ew-3.W2KDEMIG>
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Hello. I'm trying to get a sub-to-rs232 adaptor running with FreeBSD-5. The vendor of this adaptor is some chinese company named High-Edge Tech, but as usbdevs shows, it identifies as USB_VENDOR_PROLIFIC(0x067b) and USB_PRODUCT_PROLIFIC_PL2303(0x2303). For testing, I connect the adaptor with the same computer's cuaa0 and do an 'stty speed 9600 clocal' on /dev/ucom0 and /dev/cuaia0. Now, if I do 'cat < /dev/ucom0' and 'cat > /dev/cuaa0', I see typed characters coming in. If I try the opposite direction, nothing happens. Is that something, I should've expected, and if so, why? Does it have to do with the difference of callin and callout devices? Can I use /dev/ucom0 only as callin device like /dev/ttyd0? Thanks, Norbert
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