MartinKeppler

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About MartinKeppler

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  1. I remeber I had a similar problem, but do not remeber excatly where... I try to catch my memories ... Are you sure, that there is no error at boot up? It's possible that system uses the pins for something. You can test this by trying to export the gpio manually. If you can export and set value of gpios, system doesn't use them. When you get an error, you have to search for the useage.
  2. Hi Heinrich, I think it should be working. I'm excited about your reports. Yours, Martin
  3. Hi Heinrich, I think it should work this way. As far as I know, you do not need to change dts. Did you try it? If you get any problems, let us know. Yours, Martin
  4. My throws an excpetion with uart7: java.io.IOException: Failed to SET terminal attribute for the serial port. (Error #5) My is setting /dev/ttyS3 as uart7. Is this correct?
  5. Good morning, I gave it a try and used uart3 on con3 with tx on pin8 and rx on pin10, but unfortunately there are also boot outputs. Next try is to use uart7 on J12 with rx on pin4 and tx on pin6. I will report.
  6. Thanks Guys. Ok, sounds like it's really better to use uart3, for example. I also been thinking that this topic was discussed early. I remember I read about, but couldn't find it anywhere. Yours, Martin
  7. Hi guys, I tried to disable console output on uart0 using this guide https://docs.armbian.com/User-Guide_Fine-Tuning/#how-to-toggle-boot-output But I still get boot output on uart0. Problem is, that I'm using uart0 for a java application. Java application crashes a few seconds after starting. I got the hint, that I should disable console output on this port, to make it working. See here: http://pi4j.com/example/serial.html I think that's the problem, because if I unplug my serial device from uart0, java app doesn't crash. I'm using Banana Pi. Kernel is Verison 4.8.12. Armbian is Jessie 5.24 with desktop. How can I disable the output? Yours, Martin
  8. Hi erazor, thats great to read! Just wanna give you an answer, that it propably would be about the pwm isn't working. My display also is flashing for a short moment, but stays black when pwm isn't in the dtb. I think thats also good information for all others who try to use Banana Pi and Pro with LCD. Yours, Martin
  9. Hi Friends, on Banian I was using "xset dmps force off" and "xset dpms force on" to switch display off and on as I need it. Tryed to use this commands in terminal with armbian but nothing happens. I'm using LeMakers 5" LCD RGB Display with PCAP Touch. Armbian is 5.24 jessi with desktop and 4.8.12 Kernel. Has anyone an Idea, how to turn off and on display form terminal? Yours, Martin
  10. After few weeks of researching and testing, I want to thank you fpr your help. Found everthing I needed! Yours, Martin
  11. Do you know, if there is a PMU on the Board? As I know from Banana Pi, you can detect the connection from sysfs. On the Banana Pi there is /sys/power/axp_pmu/vbus/connected file. If you read 1, the OTG is plugged in, otherwise you'll read 0. Hope this is a good hint. Yours, Martin
  12. Ok, I got the same problem. This happens because compile.sh by default forces the checkout of all sources and also by default cleans the builds you did bevor. So every time you compile, your changes will be overwritten. I suggest to set CREATE_PATCHES=yes in compile.sh. Now you will be asked in the build process to change some files. Build process is hold, till you press enter. While it's waiting, copy your changed *.dts to the two folders in source. I rember, there must be two folder: /sources/linux-vanilla/master/arch/arm/boot/dts/ and /sources/u-boot/v2016.11/arch/arm/dts/. After pressing enter, the build process automatically detects your changes and creates a patch. So you only have to do this once. You can read about build options and process here: https://docs.armbian.com/Developer-Guide_Build-Options/ Yours, Martin
  13. Hi Smuggler, I think your on the right way. Your Display needs PWM to drive backlight, as you see in this line: CONFIG_VIDEO_LCD_BL_PWM="PB2". For default pwm is not enabled in device tree. So you also have to turn on the pwm backlight. Look at this thread: https://forum.armbian.com/index.php/topic/1817-using-pwm-without-rebuilding-kernel/#entry14015 Hope it will help you. Yours, Martin
  14. Hi specialists, I'm trying to understand how the axp209 on Banana Pi works with the A20. In the Banana Pi schematics I see, that they are connected with only four lines. Two lines are used for I²C (TWSI), one is from axp209 PWROK to RESET# of A20 and another one is connected from axp209 IRQ and GPIO2 to NMI# of A20. When system is off and I press my Power Button (K1) on the Pi, the system is booting. System is running and I long press the Power Button, System shuts down. But can anyone say whats happening? What does axp209 do with IRQ, GPIO2 and PWROK pins? Wich way does the A20 recognize, that it has to shutdown? Yours Martin