Lippert Components Cool LiteRunner-86DX, Техническое руководство, Страница: 41 / 53

TME-104-CLR-86DX-R0V2.doc Rev. 0.2
36(
44
)
4.4 Programming Examples
The following programming examples are made for a Linux operation system. If other operation systems are used
some header files could be unnecessary or they can have different names.
The "iopl()" function is a Linux specific one, in Windows XP a tool called "porttalk" can be used instead.
Be careful with the interpretation of the "outb" order in our examples:
Linux:
'outb(value, address)'
DOS, Windows: 'outb(address, value)'
The code is meant to be compiled using gcc under Linux.
GPIOs on SUPERVISORY
The Cool LiteRunner-86DX general purpose I/O signals (GPIO) are part of the Vortex86DX. GPIO's 1x belongs to
GPIO set #1, GPIO's 2x to set #2 and so on, up to set #5. The following lines show an example how to program
GPIO Bank 1, whose signals are located on the SUPERVISORY connector.
#include < sys / io . h >
#include < stdio . h >
//GPIO registers:
#define GPIO1X_DAT 0x79 //gpio port 1 data
#define GPIO2X_DAT 0x7A //gpio port 2 data
#define GPIO1X_DIR 0x99 //gpio port 1 direction
#define GPIO2X_DIR 0x9A //gpio port 2 direction
int
main ()
{
if ( iopl ( 3 ) != 0 )
{
printf ( "IOPL error \ n" );
return 1 ;
}
outb ( 0xff , GPIO1X_DIR ); //set all pins of gpio port 1 to output
outb ( 0x55 , GPIO1X_DAT ); //write out 0x55 to gpio port 1
return 0 ;
}
For a more detailed description about programming the ITE8712 super I/O, please refer to chapter 8 of the
datasheet.
Note:
Please note that this source code example is done for a system running with
Linux. For other operation system it may be necessary to adapt the source code
regarding include files or headers and the syntax of I/O out commands because
Linux is using outb(value, address) instead of outb(address, value).