On 05/23/2010 04:59 PM, Everett Wang wrote: > On Sun, May 23, 2010 at 5:37 PM, Wolfgang Grandegger <[email protected]> > wrote: >> On 05/23/2010 05:48 AM, Everett Wang wrote: >>> Hi All, >>> >>> I am trying to make my serial work with xenomai. I have managed to >>> compile and almost run the cross-link example. >>> When I tried to run it, I got a shared library problem: >>> >>> examples >>> ./cross-link >>> ./cross-link: error while loading shared libraries: libxenomai.so.0: >>> cannot... >>> >>> I then added this: >>> >>> $LD_LIBRARY_PATH=/usr/xenomai/lib >>> $export LD_LIBRARY_PATH >>> >>> Is this the right thing to do? >>> >>> I tried it again. I got a little further: >>> >>> r...@beagleboard:/home/everett/examples/rtdm/profiles/serial# ./cross-link >>> main : can't open rtser0 (write), No such device >>> >>> I googled a little bit and still can't find a solution. Here is the system >>> I am >>> using: Beagleboard C4, xenomai 2.5.3, linux 2.6.33.3, cross-compiler CSL >>> 2010Q1. In my kernel configuration, I do have CONFIG_XENO_DRIVERS_16550A >>> enabled as a module. >> >> Is the module loaded. If not, it's no surprise that there is no rtser0 >> device. Anyway, I'm not sure if Xenomai's 16550A RTserial driver is >> fully compatible with OMAPs 8250 devices, especially the proper access >> method might not be supported. > > I checked with lsmod. No modules are loaded. > >> >>> In a 2007 post, I saw Philippe Gerum suggested to have "vanilla >>> serial support disabled". >>> which kernel config is that? CONFIG_SERIAL_CORE? or CONFIG_SERIAL_8250? >> >> This will disable all serial devices including the console. Not sure if >> you want that. > > That is right. Currently with a vanilla kernel and xenomai patch, my DVI > display > and USB keyboard, mouse do not function. So uart3 is the only way to interact > with the beagleboard.
There are other possibilities to interact with Linux, e.g. telnet, slogin or netcat. But it's always good to have a console. >>> I looked at my /dev/ directory and not found rtser*. It does have >>> ttyS0, ttyS1 and ttyS3 >>> for my normal serial ports. Nothing called rtser in /proc/xenomai/rtdm >>> either >>> r...@beagleboard:/proc/xenomai/rtdm# ls >>> fildes open_fildes rttest-switchtest0 >>> named_devices protocol_devices rttest-timerbench0 >>> >>> Any suggestions? >> >> Which UART device do you want to use as rtser0? On the PC you can >> shutdown the device you want to use for rtserial with: >> >> # setserial /dev/ttyS0 uart none >> >> Not sure if this works on the Beagle board, though. If not, you may need >> to disable the UARTs in your board config code. Finally you must load >> the module with the proper arguments: >> >> # insmod xeno_16550A.ko mem=0x49020000 irq=74 baud_base=? >> >> That requires XENO_DRIVERS_16550A_MMIO or XENO_DRIVERS_16550A_ANY to be >> set. If you are lucky, it might work. >> >> Wolfgang. >> > I am trying to use uart1 and uart2 (uart3 is for the console) for cross-link. > > These lines are from my dmesg output: > > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled > serial8250.0: ttyS0 at MMIO 0x4806a000 (irq = 72) is a ST16654 > serial8250.1: ttyS1 at MMIO 0x4806c000 (irq = 73) is a ST16654 > serial8250.2: ttyS2 at MMIO 0x49020000 (irq = 74) is a ST16654 > console [ttyS2] enabled All three uarts are occupied by Linux and you cannot use them as rtserial. First you need to release at least one of them. What Linux config do you use for your board? > I can see that I have xeno_16550A.ko in > /lib/modules/2.6.33.3/kernel/drivers/xenomai/serial. But I forgot if I > have set XENO_DRIVERS_16550A_MMIO or XENO_DRIVERS_16550A_ANY during > xenomai configuration. How to check > these configuration? I can't find a .config file like linux kernel. > The config.log > doesn't contain these. It should be in the kernels .config! > When I tried to load the driver by: > > r...@beagleboard:~# insmod xeno_16550A.ko mem=0x4806a000 irq=72 > baud_base=19200 > sh: insmod: not found > r...@beagleboard:~# Hm, maybe modprobe is present. Might be a busybox config issue. Wolfgang. _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
