CC3351: SimpleLink Wi-Fi CLI TX packet length discrepancy

Edward Jen

Part Number: CC3351
Other Parts Discussed in Thread: SIMPLELINK-WIFI-TOOLBOX

Tool/software:

Hello TI,

I am observing a discrepancy between the Wi-Fi maximum packet length as permitted in the SimpleLink GUI and the CLI.

For 802.11n, the GUI permits a maximum packet length of 16000 bytes. However, the response from CLI indicates a maximum packet length of 10000 bytes using the same parameters and same preamble type of 11n mixed mode.

This is the GUI:

These are the commands that were issued after loading the firmware and calibration files:

simplelink-wifi-toolbox.exe radio-tool -i XDS110 -param1 LS4209CK wlan plt --on

simplelink-wifi-toolbox.exe radio-tool -i XDS110 -param1 LS4209CK wlan tx start --channel "100" --band "b5Ghz" --calibrate --tx_parameters_file C:\ti\simplelink_wifi_toolbox_win_2_4_5\tx_parameters_p_11n_mixed_mode.json

Contents of tx_parameters_p_11n_mixed_mode.json

{
  "bitmask": 4294967295,
  "delay": 70,
  "packet_mode": "continuous",
  "number_of_packets": 16000,
  "data_mode": "random_value",
  "data_const_value": 85,
  "src_addr": "22:22:33:44:55:66",
  "dst_addr": "02:02:03:04:05:06",
  "packet_length_start": 100,
  "packet_length_end": 100,
  "preamble_type": "p_11n_mixed_mode",
  "phy_rate": "r_65_mbps",
  "tx_power": 16,
  "tx_power_limit": 21,
  "enable_cca": true,
  "gi_ltf_type": "gl_0p8ms_GI",
  "_options_": {
    "delay_options": "50 .. 1000000",
    "packet_mode_options": [
      "continuous",
      "single_packet",
      "multi_packet"
    ],
    "number_of_packets_options": "1 .. 10000",
    "data_mode_options": [
      "constant_value",
      "increment",
      "random_value"
    ],
    "data_const_value_options": "0 .. 255",
    "packet_length_start_options": "0 .. 16000",
    "packet_length_end_options": "0 .. 16000",
    "phy_rate_options": [
      "r_6p5_mbps",
      "r_13_mbps",
      "r_19p5_mbps",
      "r_26_mbps",
      "r_39_mbps",
      "r_52_mbps",
      "r_58p5_mbps",
      "r_65_mbps"
    ],
    "tx_power_options": "-10 .. 21",
    "gi_ltf_type_options": [
      "gl_0p4ms_GI",
      "gl_0p8ms_GI"
    ]
  }
}

Response from the CLI:

2025-07-22 12:54:57,581: Starting channel tune
2025-07-22 12:54:58,020: Channel 100 tuned successfully
2025-07-22 12:54:58,020: Starting manual calibration
2025-07-22 12:54:58,698: Requesting manual calibration execution status
2025-07-22 12:54:59,657: Error occur while validation : 16000 is greater than the maximum of 10000
2025-07-22 12:54:59,657: Fail to set up TX params

Any assistance would be appreciated.

Thanks,

Edward

3 months ago

0 Dylan Hubbard 3 months ago

TI__Mastermind 46295 points

Hi Edward,

I have assigned this post to one of our HW experts to look into. Please give them some time to dig into this info and provide feedback.

0 Jonathan Cohen 3 months ago in reply to Dylan Hubbard

TI__Expert 3600 points

Hi Edward,

It looks like this is an issue not with the packet length, rather the other parameters you defined in the json file.

In your json file:

"packet_mode": "continuous",
"number_of_packets": 16000,

However number of packets parameter should not be populated if you define packet mode continuous.

And the number of packets option is written as :

"number_of_packets_options": "1 .. 10000",

That is the source of the issue most likely.

Regards,

Jonathan

0 Edward Jen 3 months ago in reply to Jonathan Cohen

Prodigy 100 points

Hi Jonathan,

Thank you for your response.

You were on the right track with looking at the json again. When I took another look at the json file, I noticed that I should have modified the packet_length_start and packet_length_end parameters instead of number_of_packets. '

Edward

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CC3351: SimpleLink Wi-Fi CLI TX packet length discrepancy