VAR-SOM-AM33 Linux Unit Testing

Unit Testing

CPU info

root@am335x-evm:~# cat /proc/cpuinfo
Processor       : ARMv7 Processor rev 2 (v7l)
BogoMIPS        : 598.35
Features        : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x3
CPU part        : 0xc08
CPU revision    : 2

Hardware        : VAR-SOM-AM33
Revision        : 0000
Serial          : 0000000000000000
root@am335x-evm:~# cat /proc/version
Linux version 3.2.0-AM335XPSP_04.06.00.11.VAR_R13 (uri@pluto) (gcc version 4.7.3 20130226 
(prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #1 T
ue Oct 15 10:06:14 IST 2013

RTC

To set the RTC first set the date from Linux shell, type:

$ date 2013.08.27-15:43

Then set the real time clock from Linux shell, type:

$ hwclock --systohc

Power down your board wait 15 seconds and power up. Check your system with date and the time should be up to date.

Audio record/play

$ aplay /usr/share/sounds/alsa/Front_Center.wav
$ arecord -f cd -d 10 -D hw:0,0 test.wav
$ aplay test.wav 

WLAN

VAR-SOM-AM33 V2.X only:
When using VAR-SOM-AM33 v2.x, SOM has a WL183x module. In that case you should configure the WL183x module as follows (only in the first boot):

$ cd /usr/bin/wlconf/
$ ./configure-device.sh [WL18xx chip]
Then choose the correct number of antennas on board and choose (n) to generate a clean configuration file from .ini


For example:

root@varsomam33:/usr/bin/wlconf# ./configure-device.sh wl1835
Device is capable of supporting 2 antenna in 2.4Ghz band
how many antennae are fitted? [1/2] : 1
Error: Module wlcore_sdio is not currently loaded
A wl18xx-conf.bin file already exists, do you want to modify it (y) or generate a clean one from .ini (n)
modify it? [y/n] : n

General usage:
List SSIDs, from Linux shell type:

$ ifconfig wlan0 up
$ iw wlan0 scan

Connecting to an encrypted network:

Find your network from the above scan command.

$ wpa_passphrase <YourAP> <YourPassword> >wpa.conf
$ ps | grep wpa_supplicant
*kill the wpa_supplicant process if exist.
$ wpa_supplicant -Dnl80211 -iwlan0 -c./wpa.conf -B
$ udhcpc -iwlan0
$ ifconfig

• WL12xx calibration tool

Calibration of TI WL12xx wireless device is required and is saved into the NVS file. The NVS file is then used by the wl12xx driver. For more details please read NLCP Calibration Process

Gbit Ethernet

On Target:

$ ifconfig
$ iperf -s -u

On Host:

$ iperf -c 192.168.1.189 -u -b1000M -w4KB

OpenGL demo (supported CPUs)

Run the demo script at Linux command prompt after the VAR-DVK-AM33 EVB boots up

/etc/init.d/335x-demo 

ADC controller

please follow TI wiki pages: http://processors.wiki.ti.com/index.php/AM335x_ADC_Driver%27s_Guide

Bluetooth

• Bring BT device up:

$ hciconfig hci0 up
$ hcitool scan 

Work with standard bluetooth API and commands

CAN Bus

• Connect CANL, CANH and GND pins of two VAR-SOM-AM33 boards (located on J17).
• Power-up both boards.
• Type the following into the shell of both boards for configuration the CAN bus device:

$ ip link set can0 type can bitrate 50000 triple-sampling on
$ ip link set can0 up

• Type the following to the shell of board 1 (which is used for testing receiving over can0 device):

$ candump can0

• Type the following to the shell of board 2 (which is used for testing sending data packets over can0 device):

$ cansend can0 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88

• At this point, board 1 will receive the data packet sent from board 2:

<0x001> [8] 11 22 33 44 55 66 77 88