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The calibrator and other useful utilities for TI wireless solution,
based on the wl12xx and wl18xx drivers.
--- Build procedure
Kernel configuration.
Make sure your kernel is configured to support nl80211 testmode commands
(NL80211_TESTMODE=y). Also enable following configurations:
CRC7=m
FW_LOADER=m
In userspace there is dependent on libnl v2.x package. It can be downloaded
from http://www.infradead.org/~tgr/libnl/files/libnl-2.0.tar.gz
Set follow environment variables:
export NFSROOT=
export CROSS_COMPILE=arm-none-linux-gnueabi-
make
make install
--- How to calibrate wl12xx
Calibration is a process in which specific radio configuration
parameters are generated and saved into the NVS file, later to be used
by the wl12xx driver upon initialization.
These configuration parameters are specific to the chip on the
specific design and therefore are sent back to the driver to store in
non-volatile memory for later use. Upon initialization, the wl12xx
driver will load an NVS file where it expects to read those parameters
and send them to the chip.
The NVS file contains 2 main parts - one stores the calibration
parameters and the other one stores initialization information
required for the wl12xx driver.
Automatic calibration procedure.
* Make sure all modules up to wl12xx.ko are loaded. wl12xx_sdio.ko should NOT be loaded.
* The firmware directory must be writeable.
* A "plt firmware" must be present in the firmware directory.
calibrator plt autocalibrate
dev Device name. Probably wlan0
kernel mod Full path to wl12xx_sdio.ko kernel module
ini Full path to Radio param ini file
nvs Full path of nvs file. Must be the real path as wl12xx will load it
This command will perform the following steps:
* Parse the ini and create an nvs without calibration data.
* Load kernel module.
* Perform TxBip and update nvs with calibration data.
* Unload kernel module.
Android example:
./calibrator plt autocalibrate wlan0 /system/lib/modules/wl12xx_sdio.ko TQS_D_1.7.ini /etc/firmware/ti-connectivity/wl1271-nvs.bin 00:01:02:03:04:05
Native Linux example:
./calibrator plt autocalibrate wlan0 /lib/modules/wl12xx_sdio.ko TQS_D_1.7.ini /lib/firmware/ti-connectivity/wl1271-nvs.bin 00:01:02:03:04:05
--- How to choose INI file (wl12xx)
For Beagle board and Panda board use ini_files/127x/TQS_S_2.6.ini
For Blaze board with ES2.1 or ES2.1 use ini_files/128x/TQS_D_1.7.ini
--- How to change MAC address in calibrated NVS
./calibrator set nvs_mac []
If the MAC address missing, the random valid value will be added.
--- How to dump NVS file (wl12xx)
calibrator get dump_nvs []
--- Detailed instructions for calibrator procedures (wl12xx)
Normally you should use the autocalibrate command but it's also possible to
run each step manually.
TxBip procedure (calibration)
It is important to set MAC address to an interface before the procedure.
For example, `ifconfig wlan0 hw ether xx:xx:xx:xx:xx:xx'
calibrator wlan0 plt power_mode on
calibrator wlan0 plt tx_bip <0|1> <0|1> <0|1> <0|1> <0|1> <0|1> <0|1> <0|1>
calibrator wlan0 plt power_mode off
Result of this procedure is new NVS file created locally ./new-nvs.bin
In order to use it, copy the file to /lib/firmware/wl1271-nvs.bin and reload.
TxCont procedure
calibrator wlan0 plt power_mode on
calibrator wlan0 plt tune_channel
calibrator wlan0 plt tx_cont
calibrator wlan0 plt tx_stop
calibrator wlan0 plt power_mode off
Description: This test sends packets of data directly to air. It receives
several parameters as described bellow, to enable diversity of
operational modes.
It is mostly used to see Energy and radio impact on Air.
Content of Packet can be Random, or Zero, One, Zero, one...
Packets send are configurable with following parameters:
Delay between packets in microseconds
Rate
1 Mbps - 0x00000001 MCS_0 - 0x00002000
2 Mbps - 0x00000002 MCS_1 - 0x00004000
5.5 Mbps - 0x00000004 MCS_2 - 0x00008000
6 Mbps - 0x00000008 MCS_3 - 0x00010000
9 Mbps - 0x00000010 MCS_4 - 0x00020000
11 Mbps - 0x00000020 MCS_5 - 0x00040000
12 Mbps - 0x00000040 MCS_6 - 0x00080000
18 Mbps - 0x00000080 MCS_7 - 0x00100000
24 Mbps - 0x00000200
36 Mbps - 0x00000400
48 Mbps - 0x00000800
54 Mbps - 0x00001000
Size of data field in MPDU (in bytes, 0 - 2284)
Amount - number of packets in case of using series mode
Power - output power in dBm*1000
Seed - value for the scrambler
Packet mode - 0-single, 1-multipile, 3-continuous, 4-FCC
DC on/off - activate DCF
gi - guard interval on/off for 11n rates
Preamble
1 Mbps - long preamble mode=0
2, 5.5, 11 Mbps - long preamble mode=0, short preamble mode=1
6, 9, 12, 18, 24, 36, 48, 54 Mbps - ofdm preamble mode=4
from MCS_0 to MCS_7 - n mixed mode preamble mode=6, greenfield preamble mode=7
Type is 0-data packet, 1-ack, 2-probe req, 3-random data, 4-user data
Scrambler - on/off
CLPC
range 0-100 is disable calibration
Sequence number mode (incremented or fixed)
Destination Mac address
RxStat procedure
There are 2 ways to do it - short where all parameters has default values and
full where you have to set all parameters manually.
Short way:
calibrator plt rx_statistics
In the short way each time the statistics will be reseted.
Full way:
calibrator wlan0 plt power_mode on
calibrator wlan0 plt start_rx_statcs
calibrator wlan0 plt get_rx_statcs
calibrator wlan0 plt stop_rx_statcs
calibrator wlan0 plt power_mode off
While willing to reset the statistic run:
calibrator wlan0 plt reset_rx_statcs
Update NVS file procedure
This is procedure changes ini part of NVS file. It helps when there is need
to change ini part of NVS which already calibrated.
calibrator set upd_nvs [ []]
If NVS filename parameter not provided the current NVS file will be used from
destination directory (usually /lib/firmware).
--- Miscellaneous procedures
Read MAC address from NVS file
calibrator get nvs_mac []
Set NVS to use auto FEM detection
calibrator set autofem 1
Set FEM manufacturer
calibrator set fem_manuf 0|1
Tone transmission testing
Get in PLT mode
calibrator wlan0 plt power_mode on
Run TxTone transmission
calibrator wlan0 plt tx_tone
Tone type
1 - Carrier FeedThrough
2 - Single tone
Power [0 - 10000] mdB
Stop transmission
calibrator wlan0 plt tx_stop
Get out from PLT mode
calibrator wlan0 plt power_mode off
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--- wl18xx calibration
The wl18xx hardware does most of the calibration by itself, so the
calibration per-se is not necessary. The tool provides command for
PLT (Production Line Tests), though.
--- MAC addres for wl18xx
For now (as of 20.04.2012), the wl18xx driver uses an NVS file with
the same format as the one used for wl12xx. Most of the parameters in
this file are not used. One of the parameters that is still used is
the MAC address. The wl18xx chip has its own MAC address derived from
FuseROM, but this address can be overriden by setting it in the NVS
file. If the MAC address in the NVS file is 00:00:00:00:00:00, the
default MAC, burnt in FuseROM is used.
1. The following procedure allows the MAC address to be changed in the
NVS file:
calibrator wlan0 plt set_mac [|from_fuse|default]
specific address to use (XX:XX:XX:XX:XX:XX)
from_fuse try to read from the fuse ROM, if not available the command fails
default write 00:00:00:00:00:00 to have the driver read from the fuse ROM,
fails if not available
00:00:00:00:00:00 force use of a zeroed MAC address (use with caution!)
2. To read the MAC address that is derived from the FuseROM, the
following command can be used:
calibrator wlan0 plt get_mac
--- wl18xx power modes
To be able to use the PLT procedures, the firmware needs to be booted
in PLT-mode. To do so, the wl18xx modules need to be loaded and the
interface wlan0 must be down. Then use the following command to boot
it in PLT-mode:
calibrator wlan0 plt power_mode on
And to turn it off (so that it can be booted in normal mode by putting
the wlan0 interface up again):
calibrator wlan0 plt power_mode off
--- TX simulation in wl18xx
The wl18xx firmware supports TX packets simulation. With the
following commands, the device will send pre-defined packets to the
air:
1. Boot the firmware in PLT mode:
calibrator wlan0 plt power_mode on
2. Select the channel to use:
calibrator wlan0 wl18xx_plt tune_channel
Eg., to use channel 1 with no HT bandwidth:
calibrator wlan0 wl18xx_plt tune_channel 1 0 0
Eg., to use channel 136 with 40MHz bandwidth:
calibrator wlan0 wl18xx_plt tune_channel 136 1 1
Eg., to use channel 1 with 40MHz Minus bandwidth:
calibrator wlan0 wl18xx_plt tune_channel 1 0 2
Eg., to use channel 1 with 40MHz Plus bandwidth:
calibrator wlan0 wl18xx_plt tune_channel 1 0 3
3. Start transmitting packets:
calibrator wlan0 wl18xx_plt start_tx <20|40>
Where the following parameters can be used:
delay between packets in us
transmission rate:
0 = 1.0 Mbps 1 = 2.0 Mbps
2 = 5.0 Mbps 3 = 11.0 Mbps
4 = 6.0 Mbps 5 = 9.0 Mbps
6 = 12.0 Mbps 7 = 18.0 Mbps
8 = 24.0 Mbps 9 = 36.0 Mbps
10 = 48.0 Mbps 11 = 54.0 Mbps
12 = 6.5 Mbps (MCS0) 13 = 13.0 Mbps (MCS1)
14 = 19.5 Mbps (MCS2) 15 = 26.0 Mbps (MCS3)
16 = 39.0 Mbps (MCS4) 17 = 52.0 Mbps (MCS5)
18 = 58.5 Mbps (MCS6) 19 = 65.0 Mbps (MCS7)
20 = 65.0 Mbps + 10% (MCS7 SGI) 21 = MCS8/MCS4 at 40MHz
22 = MCS9/MCS5 at 40MHz 23 = MCS10/MCS6 at 40MHz
24 = MCS11/MCS7 at 40MHz 25 = MCS12/MCS7 at 40MHz SGI
26 = MCS13 27 = MCS14
28 = MCS15 29 = MCS15 SGI
packet size (bytes)
number of packets (0 = endless)
TBD
guard interval (0 = normal, 1 = short)
TBD
TBD
source MAC address (XX:XX:XX:XX:XX:XX)
destination MAC address (XX:XX:XX:XX:XX:XX)
channel width (0 = 20 MHz, 1 = 40 MHz)
For example, to transmit packets continuously at 500ms intervals
with 1024 bytes length (plus headers) at 65 Mbps (MCS7) on a 40MHz
channel:
calibrator wlan0 wl18xx_plt start_tx 500000 19 1024 0 0 0 0 0 00:11:22:33:44:55 01:02:03:04:05:06 1
note, In start_tx there are 3 fields that are TBD and the user must send the command with some value, please “0”:
- and set as 0.
- set as 0.
4. To stop transmitting packets:
calibrator wlan0 wl18xx_plt stop_tx
NOTE: it is very important to stop transmitting packets before
attempting a second start_tx command! If this is not done properly,
the results will be undefined (and probably not what you want).
--- RX statistics in wl18xx
The wl18xx firmware can capture packets from the air and report
statistics about it. This can be used to make sure the calibration,
antennas and RF in general is working properly.
1. Boot the firmware in PLT mode:
calibrator wlan0 plt power_mode on
2. Select the channel to use:
calibrator wlan0 wl18xx_plt tune_channel
Eg., to use channel 1 with 20MHz bandwidth:
calibrator wlan0 wl18xx_plt tune_channel 1 0 0
Eg., to use channel 136 with 40MHz bandwidth:
calibrator wlan0 wl18xx_plt tune_channel 136 1 1
3. Start gathering data:
calibrator wlan0 wl18xx_plt start_rx
4. Read the current statistics about packet reception:
calibrator wlan0 wl18xx_plt get_rx_stats
5. Stop gathering RX statistics:
calibrator wlan0 wl18xx_plt stop_rx
--- TX set power in wl18xx
1. Boot the firmware in PLT mode:
calibrator wlan0 plt power_mode on
2. Select the channel to use (see above):
calibrator wlan0 wl18xx_plt tune_channel
3. set the power
calibrator wlan0 wl18xx_plt set_tx_power <2nd_channel>
Where the following parameters can be used:
Desired power output supplied in
dBmX1000 at 125 resolution (1/8 dB),
i.e. 16.125[dBm] = 16125
Indicates which table to refer to (0-3)
0 = G band
1 = A band
Operation channel
<2nd_channel> Select the 2nd channel in siso40
0 = below
1 = above
Used for Tx antenna select.
0 = auto mode
1 = TX1
2 = TX2
3 = Both TX1 & TX2
Will this level be used for
non serving channel
Notifies the PHY FW when to discard
internal limits, disable only per
channel limits
Notifies the PHY FW when to discard
external limits - disable per rate
limits when using external PA platform
Used to determine one of three gain
calculation modes (debug only)
0 = normal operation
1 = debug mode
2 = override mode
When gainCalcMode is set to mode 3,
this indicator will be used to indicate
the user's chosen analog index
sets the post DPD gain
Good default values are:
calibrator wlan0 wl18xx_plt set_tx_power 0 0 0 0 0 1 0 0
For example, to set the power to 20dBm @ channel 11 use the following command:
calibrator wlan0 wl18xx_plt set_tx_power 20000 0 0 11 0 0 0 0 0 1 0 0
4. start transmit (see start TX)
--- Set antenna mosde in wl18xx
1. Boot the firmware in PLT mode:
calibrator wlan0 plt power_mode on
2. set the antenna :
calibrator wlan0 wl18xx_plt set_antenna_mode
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The project can be accessed from git repository:
git clone git://github.com/TI-OpenLink/ti-utils.git
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