Jump to content
New Wiki - User & Developer Guide ×

JulianR

Members
 View Profile  See their activity

  • Content Count

    8

  • Joined

  • Last visited

Posts posted by JulianR

  1. Posted

    Hi, sorry for the late answer, I was in vacation.

    I am using the latest version (Tinker_Board_2-Debian-Buster-v2.0.4-20211222).

    I get the right status if I just read and link the pin to 3.3v/GND. Also it always stays to the latest connected voltage when reading after disconnecting.

  2. Posted

    I am using the Tinkerboard 2 and wiringPi. The pullup/pulldown seems not to work for all pins. For example here I use pin 5 (pyhsical 18) and set it to pulldown. But As you can see below the value is still 1. The weird thing is that if I pull the pin up/down by connecting it for a short time to 3,3V/GND the pin always stays at the value that I connected it to no matter what pull mode I set.

    Here the terminal commands/output: 

    gpio mode 5 input

gpio mode 5 down

gpio readall
 +-----+-----+---------+------+---+--Tinker--+---+------+---------+-----+-----+
 | CPU | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | CPU |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 |     |     |    3.3v |      |   |  1 || 2  |   |      | 5v      |     |     |
 |  73 |   8 | GPIO2B1 |   IN | 1 |  3 || 4  |   |      | 5v      |     |     |
 |  74 |   9 | GPIO2B2 |   IN | 1 |  5 || 6  |   |      | 0v      |     |     |
 |   8 |   7 | CLKOUT2 |  CLK | 0 |  7 || 8  | 1 | IN   | GPIO2C1 | 15  | 81  |
 |     |     |      0v |      |   |  9 || 10 | 1 | IN   | GPIO2C0 | 16  | 80  |
 |  83 |   0 | GPIO2C3 |   IN | 1 | 11 || 12 | 0 | IN   | GPIO3D0 | 1   | 120 |
 |  85 |   2 | GPIO2C5 |   IN | 0 | 13 || 14 |   |      | 0v      |     |     |
 |  84 |   3 | GPIO2C4 |   IN | 0 | 15 || 16 | 1 | OUT  | GPIO2C6 | 4   | 86  |
 |     |     |    3.3v |      |   | 17 || 18 | 1 | IN   | GPIO2C7 | 5   | 87  |
 |  40 |  12 |  MOSI.1 |  SPI | 0 | 19 || 20 |   |      | 0v      |     |     |
 |  39 |  13 |  MISO.1 |  SPI | 1 | 21 || 22 | 0 | IN   | GPIO3D4 | 6   | 124 |
 |  41 |  14 |  SCLK.1 |  SPI | 1 | 23 || 24 | 1 | OUT  | GPIO1B2 | 10  | 42  |
 |     |     |      0v |      |   | 25 || 26 | 0 | IN   | GPIO0A6 | 11  | 6   |
 |  71 |  30 | GPIO2A7 |   IN | 1 | 27 || 28 | 1 | IN   | GPIO2B0 | 31  | 72  |
 | 126 |  21 | GPIO3D6 |   IN | 0 | 29 || 30 |   |      | 0v      |     |     |
 | 125 |  22 | GPIO3D5 |  OUT | 1 | 31 || 32 | 0 | IN   | GPIO4C2 | 26  | 146 |
 | 150 |  23 | GPIO4C6 |  OUT | 1 | 33 || 34 |   |      | 0v      |     |     |
 | 121 |  24 | GPIO3D1 |   IN | 0 | 35 || 36 | 1 | IN   | GPIO2C2 | 27  | 82  |
 | 149 |  25 | GPIO4C5 |   IN | 0 | 37 || 38 | 0 | IN   | GPIO3D3 | 28  | 123 |
 |     |     |      0v |      |   | 39 || 40 | 0 | IN   | GPIO3D7 | 29  | 127 |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 | CPU | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | CPU |
 +-----+-----+---------+------+---+--Tinker--+---+------+---------+-----+-----+

     

  5. Posted

    Thank you for your response.

    The paths there do not exist on my board (Tinkerboard2). For example physical pin 3 states: "/sys/class/gpio/gpio73".

    If I do an ls on that path, none of them listed there: 

    $ sudo ls /sys/class/gpio/

export gpio16 gpio25 gpiochip0 gpiochip128 gpiochip32 gpiochip64 gpiochip96 unexport

     

  8. Posted

    Hi there,

    I am trying to port software from RPI4 to the tinkerboard. We used to access the GPIOs not with WiringPI but manually using "nmap" with a file descriptor ("/dev/mem"). To find the peripheral offset address we were reading this file: "/proc/device-tree/soc/ranges". But I can not find this path or a similar one on the tinkerboard. Can someone help me to get on the right track?

    Thanks in advance!

    Julian R.

×
×
  • Create New...