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blog:linux_serial_c_and_intel_vs._arm [2017/06/28 16:51] (current)
sam created
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 +====== Linux, Serial, C, and Intel vs. ARM ======
 +
 +I'm working on some mcu stuff and I kept running into the same problems when writing code to talk to it on Linux. ​  ​I'​ve been writing code on my desktop, moving it to either my Chromebook or an RPi.
 +
 +So I'm writing it down sos I remember. ​  I thought it might be because of the ''​ch341''​ UART adaptor I had on my shitty arduino clone, but I'm running into it elsewhere.
 +
 +  * In c_iflag, IRCNL is set on be default on ARM, converting CR's into NL'​s. ​  ​Annoying when you write stuff designed to be understood by humans and machines.
 +  * cfsetispeed and cfsetospeed don't seem to work.   ​cfsetspeed does.
 +  * O_NONBLOCK never seems to work right. ​  Leave it alone and use c_cc[VMIN || VTIME] instead, because that's smarter anyway.
 +
 +There will probably be more here.
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 +