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 Gets the direction, od and level information for the specified pin
gpio set dir Sets the direction of the specified pin
gpio set dir Sets the od of the specified pin
gpio set dir Sets the level of the specified pin
- 0, 1, 2, 3, 4, 5, 6, 7, 19, 20, 23, 24
- 0 for input
1 for output
- 0 for output
1 for open drain
- 0 for low level
1 for high level
Table 7-4 GPIO States (continued)
GPIO# Input/Output Reset State Description