Changes between Version 3 and Version 4 of ventana/DigitalIO


Ignore:
Timestamp:
11/12/2018 11:57:31 AM (3 months ago)
Author:
Cale Collins
Comment:

added troubleshooting to i2c at dio connector section.

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  • ventana/DigitalIO

    v3 v4  
    186186Note that on these boards that have i2c-2 off-board via DIO0/DIO1 capability, there are 4.7kohm pull-up's to 3.3V on DIO0/DIO1.
    187187
     188** Troubleshooting:
     189
     190It's a best practice to only use output for troubleshooting DIO.   
     191
     192In this example a GW5304 is being used with leads attached to pin 1 and 5 or J4.
     193
     194{{{
     195echo 16 > /sys/class/gpio/export
     196root@OpenWrt:/# echo out > /sys/class/gpio/gpio16/direction
     197root@OpenWrt:/# echo 1 > /sys/class/gpio/gpio16/value # V out is high 3.3V
     198root@OpenWrt:/# echo 0 > /sys/class/gpio/gpio16/value # V out is low 0.2V
     199}}}
     200
     201
    188202
    189203=== I2C on HDMI output