On 12/09/13 23:02, Jim Rosenberg wrote: > I have need of a small low-cost SBC to manage an external device via > RS-232. Raspberry Pi would probably work fine, but I really want to run > OpenBSD if I can. BeagleBone Black seems like a really nifty board. It has > multiple UARTs, so using UART0 for console and UART1 for the device I'm > managing *should* work fine. But, I'm not seeing any sample dmesg listings > with anything in the way of serial ports but com0 showing up. I've never > tried running OpenBSD without any console at all -- I don't know if there's > a way to do this and get it to boot, but it doesn't seem like a very good > idea. Is there a way to get com1 to show up? Something involving "boot > mode" perhaps?
yes, there's a way, it even rhymes with "boot mode" -- "write code" :) There's a lot the BeagleBone Blacks and other ARM machines support in hardware that isn't yet supported in software. Code needs to be written. Also keep in mind, all those serial ports are not RS232 signal-level ports, but 3.3v ports, so additional circuits will be needed for many applications. Nick.
