this is all basic C coding http://inspire.logicsupply.com/2014/09/beaglebone-rs-485-communication.html gives you all the coding examples you need
On 7/4/2015 3:29 PM, Adrian Wong wrote: > Hello, > > I came across this tutorial on configuration for RS-485 serial > communication, but I am new to this and I need some clarifications on > the procedure. > > My beaglebone black is currently running on the latest Debian image > > > Linux beaglebone 3.8.13-bone70 #1 SMP Fri Jan 23 02:15:42 UTC 2015 > armv7l GNU/Linux > > > > > On the website > http://inspire.logicsupply.com/2014/09/beaglebone-rs-485-communication.html > > Let's dive into the Kernel a bit to to see how RS-485 works in > Linux; the standard steps to put a UART into RS-485 mode are: > > 1. Open the special tty file > 2. Create a serial_rs485 struct and set the desired configuration > values > 3. Pass the configured struct to Kernel driver by using ioctl > <http://man7.org/linux/man-pages/man2/ioctl.2.html> on the > open serial port file descriptor > > I don't understand do these steps, where do I find the special tty > file and as well as creating the serial_rs485 struct. Can someone > guide me through this part? > > Thank you. > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google > Groups "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
