Artesyn COMX-P40x0 ENP2 Installation and Use (January 2015) - Manual (Page 107)

BSP
COMX-P40x0 ENP2 Installation and Use (6806800R95C) 107
For more information, see GPIO on page 78 .
The U-Boot provides several GPIO utility commands.
The parameters used in the GPIO utility commands are described below.
GPIO07 O I GPO4 of COM-E connectors
GPIO19 O I Clock Generator Enable
GPIO20 O I Carried board reset output
GPIO23 I I Clock generator of bank 1 frequency selection input
GPIO24 I I Clock generator of bank 2/3 frequency selection input
Table 7-5 GPIO Command Usage
Command Description
gpio dump Dumps the direction, od and level information for all pins
gpio get <pin> Gets the direction, od and level information for the specified pin
gpio set dir <pin> <dir> Sets the direction of the specified pin
gpio set dir <pin> <od> Sets the od of the specified pin
gpio set dir <pin> <lvl> Sets the level of the specified pin
<pin> - 0, 1, 2, 3, 4, 5, 6, 7, 19, 20, 23, 24
<dir> - 0 for input
1 for output
<od> - 0 for output
1 for open drain
<lvl> - 0 for low level
1 for high level
Table 7-4 GPIO States (continued)
GPIO# Input/Output Reset State Description