Hi Abraham, I finally got it working by adding "#define CONFIG_SYS_ENABLE_PADS_ALL" in u-boot/include/configs/omap4_common.h! This is removed by default in v2013.10. Do you know why? Thank you!
On Sun, Nov 24, 2013 at 10:11 PM, Abraham V. <abraham.varric...@vvdntech.com> wrote: > Hello Chao, > > That sounds odd. Can you try downloading the latest mainline uboot sources > and compiling those for your board? > > ftp://ftp.denx.de/pub/u-boot/ > > At least, for the pandaboard I have, the 2013.10 release works well, > following your instructions. Only difference is that I'm using linaro's > cross-compiler. > > Puzzled, > Abraham V. > > > On Fri, Nov 22, 2013 at 8:59 PM, Chao Xu <caesarxuc...@gmail.com> wrote: >> >> Hi Abraham, >> >> Thank you very much for your detailed reply! But I think I can rule >> out the three possible problems you mentioned. >> 1. The cross compiler should be fine. Because I use it all the time to >> compile kernel for pandaboard and it has never been a problem >> 2. I'm doing exactly what you suggested, i.e. the SD card is >> partitioned by a pre-built image. >> 3. The serial cable is fine because the pre-built image was working >> properly with the serial cable. Only after I update the u-boot comes >> the no-output problem. >> Could you think of any other possible problem? I suspect maybe I need >> to modify other files (uEnv.txt, boot.scr) in the /boot partition? >> These files came along with the pre-built image. Thanks again. >> >> On Fri, Nov 22, 2013 at 3:17 AM, Abraham V. >> <abraham.varric...@vvdntech.com> wrote: >> > My company is designing a custom board that can be thought of as a >> > derivative of the pandaboard. I believe we have Rev B1 with us in the >> > office. >> > >> > Considering that you are not getting any debug messages on your serial >> > console, I suspect one of the following; >> > * your cross-compiler might have issues >> > * you haven't partitioned the SD card properly >> > * your serial cable might be damaged. >> > >> > Just short the TX and RX lines of your serial cable to test the last >> > point. >> > If you can see echo messages, then good, at least the cable is working. >> > >> > Next worry about the partitions - to boot from SD card, the omap4 on the >> > pandaboard expects it in a certain format. Try using pre-build binaries. >> > For >> > example; >> > >> > http://www.omappedia.com/wiki/Android_Panda_Pre_Built >> > http://omappedia.org/wiki/Ubuntu_Pre-built_Binaries_Guide >> > >> > They have instructions on how to format your SD card. Assuming they >> > work, >> > then good! Last point is to check your cross-compiler. Just replace the >> > existing MLO and u-boot.bin (or u-boot.img; it depends on what version >> > you >> > have) on the SD card with your compiled ones and you'll be in a good >> > position to narrow down bugs. >> > >> > All the best, >> > Abraham V. >> > >> > >> > On Fri, Nov 22, 2013 at 11:41 AM, Chao Xu <caesarxuc...@gmail.com> >> > wrote: >> >> >> >> Hi, >> >> >> >> I'm trying to compile the latest u-boot for my Pandaboard Rev A2. The >> >> SD card was originally loaded with a working version of 12.04 >> >> linaro-unbunt-developer image. Early printk is enabled in the original >> >> image. >> >> >> >> I followed this guide (http://elinux.org/Panda_How_to_MLO_%26_u-boot) >> >> and here is what I did: >> >> 1. export ARCH=arm >> >> 2. export CROSS_COMPILE=arm-linux-gnueabi- >> >> 3. make omap4_panda_config >> >> 4.make >> >> 5. cp MLO u-boot.img /SDCARD/boot/ >> >> >> >> But when switching on my Panda, there is no output from the serial >> >> port. And the heartbeat LED is always off. (When every thing works, it >> >> is on when booting, and blinks after booting finished). >> >> >> >> I don't have any former experience with u-boot. So please let me know >> >> if there is any more info I should provide. >> >> >> >> Any help would be much appreciated! Thank you! >> >> >> >> -- >> >> Regards, >> >> Chao Xu >> >> _______________________________________________ >> >> U-Boot mailing list >> >> U-Boot@lists.denx.de >> >> http://lists.denx.de/mailman/listinfo/u-boot >> > >> > >> >> >> >> -- >> Regards, >> Chao Xu > > -- Regards, Chao Xu _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
