The pins you said are the right ones. However, if anything fails before the kernel is booted you won't get any output. You could try booting a 3.14 image and check if you are properly connected to the uart.
It may be some wrong configuration related to the recently added DT support, which expects a DTB and since no DTB is passed from the bootloader, the kernel crashes before any output. > El 10/2/2015, a las 6:29, John Crispin <[email protected]> escribió: > > ok, so uart, how do you connect it ? > >> On 10/02/2015 02:02, Álvaro Fernández Rojas wrote: >> I tried adding support for 3.18 and I have issues booting the raspberry. >> There must be something wrong with the new mmc driver, because it detects >> the SD card insertions/extractiones, but doesn't read the partitions: >> http://pastebin.com/GWFYrXnT >> >> My patches: >> http://files.noltari.es/openwrt/bcm2708/brcm2708_3-18.tgz >> >> Regards, >> Álvaro. >> >>> El 09/02/2015 a las 18:12, Florian Fainelli escribió: >>>> On Feb 9, 2015 4:25 AM, "John Crispin" <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> >>>> Hi, >>>> >>>> i synced our rpi port with the upstream tree on github. it boots and i >>>> can see the coloured palette test pic on the hdmi, however ethernet >>>> fails to come up. i attached a uart just to find out that my rpi is >>>> either broken or i am connecting it wrong. >>>> >>>> has anyone managed to get uart working ? to my understanding i need to >>>> connect pin6 to gnd and use 8 and 10 for the 2 data lines. should i see >>>> output from the bootloader prior to board detecting/loading the sd card >>> >>> You will not get any UART output prior to the kernel boot, the GPU boot >>> code does not output anything (at least not in the builds we use). >>> >>> Could you share the boot log to see if there is anything obvious? >>> >>>> >>>> John >>>> _______________________________________________ >>>> openwrt-devel mailing list >>>> [email protected] <mailto:[email protected]> >>>> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel >>> >>> >>> >>> _______________________________________________ >>> openwrt-devel mailing list >>> [email protected] >>> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel >>> _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
