While I am likely getting in way over my head, are there any settings that can be modified on a BeagleBone black as it relates to the UART oscillator? I have seen some reference to the specification of the AM335x regarding:
The UART modules each have a 48MHz clock to generate their timing. They can be configured in one of two modes: UART 16x and UART 13x, in which that clock is divided by 16 and 13, respectively. I am still trying to get an application I wrote to communicate with a 3rd party controller and grasping at straws at this point.I just can't figure out why everything works fine when I go through /ttyUSB0 (using a USB-serial adapter), but when I try to utilize the /tty04 UART, I can't communicate. Without drowning this thread with every little thing I have done, I have come to the following conclusions: 1) My application works because I can confirm it's functionality when connected via USB-serial adapter 2) My UART circuit (have tried with a MAX3232 and a MAX232) works because I can open up minicom and do a loopback test successfully. I have also communicated from mt BB to a Windows PC at the same baud rate that I am attempting to use with my application, so based on the fact that the manual communication between BB and PC was successful, I feel confident that my UART circuit is ok. 3) Currently I have a logic analyzer hooked up and I am looking at the data I am transmitting from my BB. The applicatio I use with the analyzer decodes the protocol and the data I am seeing from my circuit is the data I am expecting to see. This snapshot is from the USB-serial connection transmission: [image: usb.JPG] This snapshot is from the UART circuit transmission: [image: uart.JPG] -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/2feccea4-cac2-4d27-be2b-8de183be352d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
