From nobody Sun Dec 24 15:57:05 2023 X-Original-To: freebsd-arm@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Sylz81VXYz54p6D for ; Sun, 24 Dec 2023 15:57:08 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Received: from www.zefox.net (www.zefox.net [50.1.20.27]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "www.zefox.com", Issuer "www.zefox.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Sylz75cH3z4QwX for ; Sun, 24 Dec 2023 15:57:07 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Authentication-Results: mx1.freebsd.org; none Received: from www.zefox.net (localhost [127.0.0.1]) by www.zefox.net (8.17.1/8.15.2) with ESMTPS id 3BOFv6nn020425 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sun, 24 Dec 2023 07:57:06 -0800 (PST) (envelope-from fbsd@www.zefox.net) Received: (from fbsd@localhost) by www.zefox.net (8.17.1/8.15.2/Submit) id 3BOFv6VU020424; Sun, 24 Dec 2023 07:57:06 -0800 (PST) (envelope-from fbsd) Date: Sun, 24 Dec 2023 07:57:05 -0800 From: bob prohaska To: Marcin Cieslak Cc: freebsd-arm@freebsd.org Subject: Re: USB-serial adapter suggestions needed Message-ID: References: <480135o1-0ns4-p9qq-95nn-595s665rn500@fncre.vasb> List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <480135o1-0ns4-p9qq-95nn-595s665rn500@fncre.vasb> X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:7065, ipnet:50.1.16.0/20, country:US] X-Spamd-Bar: ---- X-Rspamd-Queue-Id: 4Sylz75cH3z4QwX On Sun, Dec 24, 2023 at 01:33:14AM +0000, Marcin Cieslak wrote: > On Sat, 23 Dec 2023, bob prohaska wrote: > > > Thanks for writing & confirming ch340 is an option! > > One more thing - please be aware that the adapter I have > gives only a simple three-wire connection (RxD, TxD, GND) > so there is NO hardware flow control of any sort. I'm using usb-serial adapters to access RPi serial consoles, so no hardware flow control is needed (or usable). RTS/CTS would be nice in principle, for example to connect to a much slower device (a pen plotter comes to mind). Programming support seems to be the most valuable feature. Thanks for reading, bob prohaska