Basic GPIO example doesn't work on Pico Ultra W

• Spock

  Posts: 6

  Joined: 2024-07-18 17:04

  2024-12-17 10:40

  Hi,
  
  I'm testing GPIO functionality using basic example from Wiki.
  Input seems work ok - but output does not.
  
  Input works:

  Code: Select all

  [root@luckfox gpio]# echo 54 >export
  [root@luckfox gpio]# cd gpio54/
  [root@luckfox gpio54]# cat value
  0
  ## connect 3.3V to GPIO1_C6. Multimeter shows 3.3V
  [root@luckfox gpio54]# cat value
  1

  However output is not working:

  Code: Select all

  [root@luckfox gpio54]# echo out >direction
  [root@luckfox gpio54]# echo 1 > value
  [root@luckfox gpio54]# cat value
  0
  [root@luckfox gpio54]#
  ## Multimeter  shows 0 (22 mV to be exact).
  

  Is it me doint something wrong ?
  Thanks!

  • Quote

iomux 1 22

Spock

Posts: 6

Joined: 2024-07-18 17:04

2024-12-23 13:05

Crocodile wrote: ↑2024-12-23 1:40 Hello 54 55 GPIO corresponds to GPIO1_C6 GPIO1_C7, the default is set to LCD data pin, please use luckfox-config to set RGB to disabled and then use iomux command to view multiplexing

Code: Select all

iomux 1 22

If "mux get (GPIO1-22) = 0" is returned, the GPIO54 is successfully set to GPIO, and then the level is pulled high and low.
The default GPIO pins for the Luckfox Pico Ultra are GPIO32 (GPIO1_A0_d), GPIO33 (GPIO1_A1_d), GPIO40 (GPIO1_B0_d), and GPIO41 (GPIO1_B1_d).
The Luckfox Ultra W test I have in my hand is normal, and it is possible that the hardware is damaged

Thanks - you were right. After disabling RGB all started to work !
Thanks - I can buy more boards if my PoC will work

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