Changes between Version 3 and Version 4 of ventana/DigitalIO

Timestamp:

11/12/2018 07:57:31 PM (5 years ago)

Author:

Cale Collins

Comment:

added troubleshooting to i2c at dio connector section.

ventana/DigitalIO

@@ -186 +186 @@
 Note 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.
 
+** Troubleshooting:
+
+It's a best practice to only use output for troubleshooting DIO.   
+
+In this example a GW5304 is being used with leads attached to pin 1 and 5 or J4.
+
+{{{
+echo 16 > /sys/class/gpio/export
+root@OpenWrt:/# echo out > /sys/class/gpio/gpio16/direction
+root@OpenWrt:/# echo 1 > /sys/class/gpio/gpio16/value # V out is high 3.3V
+root@OpenWrt:/# echo 0 > /sys/class/gpio/gpio16/value # V out is low 0.2V
+}}}
+
+
 
 === I2C on HDMI output