From: Bill S. <sco...@gm...> - 2006-03-29 19:19:12
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Hi, Dave my configuration is gumstix, tweener and robostix about the gumstix serial port, I need two serial ports to be access from gumstix I know the ttyS0 and ttyS1 are taken already. I was able to access the ttyS2 from the robostix. What the about the HW serial port, how can I access it? Also, do you have any hints on how to start accessing serial port of the robostix from the gumstix. Thank you for your time. |
From: Dave H. <dhy...@gm...> - 2006-03-29 20:14:42
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Hi Bill, > my configuration is gumstix, tweener and robostix > > about the gumstix serial port, I need two serial ports to be access from > gumstix > I know the ttyS0 and ttyS1 are taken already. > > I was able to access the ttyS2 from the robostix. The robostix brings out ttyS0 (on the gumstix connector) and ttyS2 (part of the UARTs connector). Both of these are 5v logic level ports. This page: http://gumstix.org/tikiwiki/tiki-index.php?page=3DRobostix-Serial has a number of logic level to RS232/USB converters. The tweener also brings out the console (ttyS0) as RS-232 level (and requires a mod to be used with the robostix: http://gumstix.org/tikiwiki/tiki-index.php?page=3DTweener-Mod > What the about the HW serial port, how can I access it? This is just a voltage converter to convert one of the logic level ports to RS-232 level ports. > Also, do you have any hints on how to start accessing serial port of the > robostix from the gumstix. I'm planning on doing something along the lines of what the USB serial gadget does. I already have code for manipulating the serial buffers on the robostix using a circular buffer. What I was planning was to connect a circular buffer to the gumstix thru i2c and using a virtual serial port driver. I just haven't had any time to work on this. The linux device driver book also has a section Chapter 18 talks about creating TTY drivers. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |