probrokker

Can you explain the variables from the formula? it’s not clear how to count.

I can’t get the result of a button click. The button is connected to the PD15 contact. echo 9 > /sys/class/gpio/export (gpio9?) cat /sys/class/gpio/gpio9/value every result: 0 Tell me what the problem is. I also have https://github.com/orangepi-xunlong/WiringOP installed, which shows: gpio -v gpio version: 2.46 Copyright (c) 2012-2018 Gordon Henderson This is free software with ABSOLUTELY NO WARRANTY. For details type: gpio -warranty * Device tree is enabled. * -> OrangePi 3 gpio readall (what Orange Pi RK3399?) +------+-----+----------+------+---+OrangePi RK3399---+---+------+---------+-----+--+ | GPIO | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | GPIO | +------+-----+----------+------+---+----++----+---+------+----------+-----+------+ | | | 3.3v | | | 1 || 2 | | | 5v | | | | 43 | 0 | SDA.0 | ALT4 | 0 | 3 || 4 | | | 5V | | | | 44 | 1 | SCL.0 | IN | 0 | 5 || 6 | | | 0v | | | | 64 | 2 | GPIO4 | IN | 1 | 7 || 8 | 0 | IN | Tx | 3 | 148 | | | | 0v | | | 9 || 10 | 0 | IN | Rx | 4 | 147 | | 80 | 5 | GPIO17 | IN | 1 | 11 || 12 | 1 | IN | GPIO18 | 6 | 65 | | 81 | 7 | GPIO27 | IN | 0 | 13 || 14 | | | 0v | | | | 82 | 8 | GPIO22 | ALT2 | 1 | 15 || 16 | 0 | IN | GPIO23 | 9 | 66 | | | | 3.3v | | | 17 || 18 | 1 | ALT2 | GPIO24 | 10 | 67 | | 39 | 11 | MOSI | ALT3 | 0 | 19 || 20 | | | 0v | | | | 40 | 12 | MISO | ALT4 | 1 | 21 || 22 | 0 | IN | GPIO25 | 13 | 83 | | 41 | 14 | SCLK | IN | 0 | 23 || 24 | 1 | OUT | CS0 | 15 | 42 | | | | 0v | | | 25 || 26 | 0 | ALT4 | CS1 | 16 | 133 | | 154 | 17 | DNP1 | IN | 1 | 27 || 28 | 1 | OUT | DNP2 | 18 | 50 | | 68 | 19 | GPIO5 | IN | 0 | 29 || 30 | | | 0v | | | | 69 | 20 | GPIO6 | ALT2 | 0 | 31 || 32 | 0 | IN | GPIO12 | 21 | 76 | | 70 | 22 | GPIO13 | OUT | 1 | 33 || 34 | | | 0v | | | | 71 | 23 | GPIO19 | ALT2 | 0 | 35 || 36 | 0 | IN | GPIO16 | 24 | 73 | | 72 | 25 | GPIO26 | IN | 1 | 37 || 38 | 1 | OUT | GPIO20 | 26 | 74 | | | | 0v | | | 39 || 40 | 0 | ALT2 | GPIO21 | 27 | 75 | | | | (null) | | | 41 || 42 | | | (null) | | | +------+-----+----------+------+---+----++----+---+------+----------+-----+------+ | GPIO | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | GPIO | +------+-----+----------+------+---+OrangePi RK3399---+---+------+---------+-----+--+

Thanks It works!

Thanks It works! One more question - Disconnected ruart in armbian-config and loaded dynamically. The port has earned, but when you restart orange pi, the ruart folder is not available and you need to register it. How can I automate the process of adding?

Hi, tell me please how to properly enable RUART (S-UART) on Orange Pi 3. The Armbian Bionic build (kernel 5.1) is installed, RUART (S-UART) is enabled via raspbian-config, but does not work. What are the options? Required to connect the UART device. UART 3 is working, RUART (S-UART) does not work. Image: Pin (08, 10)