Datasheet

VIPER Embedded Linux Development Kit Quickstart Arcom Embedded Linux (AEL)

Hardware configuration

Touchscreen Controller (TSC1)

If your VIPER ICE was supplied with a touchscreen, the touchscreen controller is

attached to /dev/ttyS2 (COM3). In a CYCLOPS system, the touchscreen controller is

attached to /dev/ttyS4 (COM5).

PC/104 bus

The PC/104 bus on the VIPER is attached via the second PCMCIA controller built in to

the PXA255 processor.

The PC/104 I/O address space is mapped at virtual address 0xF1000000. This means

that a PC/104 card that has been configured at I/O address 0xXXX is available at virtual

address 0xF1000XXX. This virtual address is the correct value to use when configuring

a device driver for that card, rather than the associated physical address.

Previous versions of Arcom Embedded Linux on the VIPER using version 2.4 of

the Linux kernel used 0xF7000000 as the offset for the PC/104 I/O address

space.

The PC/104 memory address space is available at physical address 0x3C000000. This

means that a PC/104 card that has been configured for memory address 0xXXXX is

available at physical address 0x3C00XXXX. It is the responsibility of the driver to map

this address into the kernel’s virtual address space before use.

The PC/104 interrupts are mapped as shown in the following table:

PC/104 interrupt VIPER interrupt

3 104

4 105

5 106

6 107

7 108

10 109

11 110

12 111

9* 112

14* 113

15* 114

* These interrupts are only available on version 2 of the VIPER hardware.

For more information, see the VIPER Technical Manual and PXA255 Developer’s

Manual.