Changes between Version 13 and Version 14 of USB

Timestamp:

11/05/2019 06:36:16 PM (4 years ago)

Author:

Cale Collins

Comment:

improvements to switched socket power section.

USB

@@ -305 +305 @@
 === Switched Socket Power ===
 
-GW53xx and GW54xx boards with -G and later revisions have a programmable load switch added that can enable and disable power on a single slot by toggling a GPIO.
+GW53xx and GW54xx boards with -G and later revisions have a power switch added that can enable and disable power on a single slot by toggling a GPIO.  Power is enabled by default.  
 
 On both GW53xx and GW54xx this is GPIO79 (GPIO bank 3, DIO 15), pad PAD_EIM_DA15__GPIO3_IO15. 
 
-
-
+To toggle this GPIO:
+
+{{{#!bash
+echo 79 > /sys/class/gpio/export 
+echo out > /sys/class/gpio/gpio79/direction
+echo 0 > /sys/class/gpio/gpio79/value # '0' will disable power, '1' will enable power.  
+}}}