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Showing results for tags 'aw-som-a20'.
I'm having trouble connecting my Android phone when it doesn't automatically connect and recognize. Is there a way to fix it or is there any documentation? Since it has so many different versions, I tried it and it still failed automatically. Sincerely thank you.
I am making some testing over A20-SOM from Olimex. I have a signal connected to NMI_N pin and with a legacy distribution, with power_start=0 on FEX, I am able to poweroff the board from command line (while the board is still powered) and then poweron/weakup the board raising up the signal on NMI_N. However, I need to do this on an armbian mainline distribution. I poweroff the board from command line (but keep the board powered), the PWR_LED keeps turn on and the board should wakeup when I turn on the signal on NMI_N and it does on my legacy distribution but not in armbian. Has anyone any clue, advice/tip to make this work in armbian? I really don't know where to start. if this helps, here are the docs of A20-SOM and AXP209: http://dl.linux-sunxi.org/AXP/AXP209_Datasheet_v1.0en.pdf https://www.olimex.com/Products/SOM/A20/A20-SOM/resources/A20-SOM-user-manual.pdf Many thanks for considering my request!
Hello, I need to use an IRQ interruption with a button. I mean, I push a button, and then a code is executed. Some information: The PIN is PH19, EINT19. and the board A20 SOM. Armbian SO, kernel 4.13 Firstly i configure the digital pin and IRQ from user space: echo 243 > /sys/class/gpio/export echo "in" > /sys/class/gpio/gpio243/direction echo "falling" > /sys/class/gpio/gpio243/edge Now, when I push the button, I can monitoring the IRQ and the counter related to cat /proc/interrupts But now, how can I run a program when the interruption event happens ? I have seen this useful link http://linux-sunxi.org/External_interrupts How can i use it? I think there is very few information about this issue. I executed a bash script with while true , and polling the digital pin, but the disadvantage is that it consumes a lot of cpu. I hope you can help me. Thank you very much in advance Regards