User`s manual

Getting Started With Linux on the LPC3250 OEM Board Page 38

usb 1-1: new full speed USB device using usb-ohci and address 2

usb 1-1: configuration #1 chosen from 1 choice

scsi0 : SCSI emulation for USB Mass Storage devices

scsi 0:0:0:0: Direct-Access SanDisk Cruzer 8.02 PQ:

0 ANSI: 0 CCS

sd 0:0:0:0: [sda] 15704063 512-byte hardware sectors (8040 MB)

sd 0:0:0:0: [sda] Write Protect is off

sd 0:0:0:0: [sda] Assuming drive cache: write through

sd 0:0:0:0: [sda] 15704063 512-byte hardware sectors (8040 MB)

sd 0:0:0:0: [sda] Write Protect is off

sd 0:0:0:0: [sda] Assuming drive cache: write through

sda: sda1

sd 0:0:0:0: [sda] Attached SCSI removable disk

scsi 0:0:0:1: CD-ROM SanDisk Cruzer 8.02 PQ:

0 ANSI: 0

2. As can be seen in the log the USB memory stick is available on sda1, more specifically

/dev/sda1

3. Mount the memory stick.

# mount –t vfat /dev/sda1 /mnt/rwfs

4. You can now access the file system.

# cd /mnt/rwfs

# ls

5.7 LEDs and Buttons

5.7.1 Hardware

Most of the LEDs and buttons on the base board are connected to the PCA9532 device. The NXP

Semiconductor PCA9532 device is a 16-bit I

C I/O Expander.

5.7.2 Device Driver and Configuration

The driver for the PCA9532 is located here in the source tree:

/drivers/i2c/chips/pca9532.c

The following configuration options are related to the I2C and PCA9532 functionality.

Configuration

Description

CONFIG_I2C Enable I2C support in the kernel

CONFIG_I2C_PNX Enable the LPC3250 I2C interface

CONFIG_MACH_LPC32XX_I2C0_ENABLE

Enable I2C0

CONFIG_SENSORS_PCA9532 Enable support for the PCA9532 I2C device

5.7.3 Usage

The PCA9532 has a number of files exposed at the following location in the file system:

/sys/bus/i2c/devices/0-0060/

. The files in the list below are accessible and each file

represent a register in the PCA9532.

File

Description