[KL520DemoGenericInferencePostYolo][Error code] ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7

巫虹葦 · April 2022

My environment virtualbox + ubuntu 18.04

I run KL520DemoGenericInferencePostYolo.py but show

Error: upload model failed, error = 'Error raised in function: load_model_from_file. Error code: -7. Description: ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7'

before run KL520DemoGenericInferencePostYolo.py, i was run List all devices & upgrade the selected KL520 devices using the port id as follows

(1) lsusb

Bus 001 Device 007: ID 3231:0100

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet

Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

(2) ./KneronDFUT.sh --list

===========================================

Index: 1

Port Id: 5

Kn Number: 0x9E0A225C

Device Type: KL520

FW Type: KDP2 Loader

Usb Speed: High-Speed

Connectable: true

===========================================

(3) sudo ./KneronDFUT --kl520-flash-boot --port 5 --scpu ../../kneron_plus_v1.3.0/kneron_plus/res/firmware/KL520/kdp2_fw_scpu.bin --ncpu ../../kneron_plus_v1.3.0/kneron_plus/res/firmware/KL520/kdp2_fw_ncpu.bin

This update do not accept Hostlib version firmware. Downgrade firmware to earlier version is not acceptable after update.

Do you want to proceed? (y/n)

y

Start Update Device with Port Id 5 to Flash Boot

Segmentation fault

i suppose can't downgrade firmware so before run KL520DemoGenericInferencePostYolo.py, I mark upload firmware to device

"""

try:

print('[Upload Firmware]')

kp.core.load_firmware_from_file(device_group=device_group,

scpu_fw_path=SCPU_FW_PATH,

ncpu_fw_path=NCPU_FW_PATH)

print(' - Success')

except kp.ApiKPException as exception:

print('Error: upload firmware failed, error = \'{}\''.format(str(exception)))

exit(0)

"""

python KL520DemoGenericInferencePostYolo.py

[Connect Device]

- Success

[Set Device Timeout]

- Success

[Upload Model]

Error: upload model failed, error = 'Error raised in function: load_model_from_file. Error code: -7. Description: ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7'

Ethon Lin · April 2022

Hello,

The issue could be caused by insufficient permission to access usb device.

Please following the steps to set config for Kneron's device.

http://doc.kneron.com/docs/#plus_python/introduction/install_dependency/#3-update-kneron-ai-device-usb-permission-on-ubuntu-and-raspberry-pi

巫虹葦 · April 2022

Hi

之前環境是Virtual box + Ubuntu 18.04

現在環境改成 win10 + python3.6

(1) Run KL520DemoGenericInferencePostYolo.py -- OK

[Connect Device]

- Success

[Set Device Timeout]

- Success

[Upload Firmware]

- Success

[Upload Model]

- Success

[Read Image]

- Success

[Starting Inference Work]

- Starting inference loop 50 times

- ..................................................

[Retrieve Inference Node Output ]

- Success

[Tiny Yolo V3 Post-Processing]

- Success

[Result]

{

"class_count": 80,

.......

(2) Run KL520DemoCamGenericInferenceDropFrame.py -- 是可以成功, 但是偶爾3~5秒後, 出現 ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7

[Connect Device]

- Success

[Set Device Timeout]

- Success

[Upload Firmware]

- Success

[Upload Model]

- Success

[Model NEF Information]

{

"crc": "0x6CBF1FF9",

"num_models": 1,

"models": {

"0": {

"id": 19,

"max_raw_out_size": 85752,

"width": 224,

"height": 224,

"channel": 3,

"img_format": "ImageFormat.KP_IMAGE_FORMAT_RGBA8888"

}

[Configure Inference Settings]

- Success

[Starting Inference Work]

- Starting inference

inference time: 0.04555344581604004

inference time: 0.030225038528442383

inference time: 0.031000137329101562

inference time: 0.03219795227050781

inference time: 0.04864621162414551

inference time: 0.027132511138916016

inference time: 0.029174327850341797

inference time: 0.031023740768432617

inference time: 0.03415870666503906

.......

- Error: inference failed, error = Error raised in function: generic_raw_inference_receive. Error code: -7. Description: ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7

- Error: inference failed, error = Error raised in function: generic_raw_inference_send. Error code: -7. Description: ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7

遇到這樣問題後，需要把USB dongle插拔後才會正常..

Andy Hsieh · April 2022

巫虹葦

Hi 巫虹葦,

想請您確認一下，您是使用 Kneron PLUS 的哪一個版本。

巫虹葦 · April 2022

Hi

您好..

我是抓\kneron_plus_v1.3.0\ 這個版本 ..

Andy Hsieh · April 2022

巫虹葦

Hi 巫虹葦,

根據您貼上來的執行過程，您可能是有修改 python script，你可以先幫我試試看使用 "沒有修改的 python script" 是否會造成問題。

巫虹葦 · April 2022

Hi

您好..

Sorry沒有敘述清楚，之前在Virtualbox+ubuntu18.04因為遇到一些問題，所以把uplaod Firmware的 code註解掉.

但是換到win10環境後，沒有特別再去修改example的code了 ..

Andy Hsieh · April 2022

@巫虹葦

Hi 巫虹葦,

不好意思，我也沒有講述清楚，

想請問您在兩個環境中

(1) Virtual box + Ubuntu 18.04

(2) win10 + python3.6

執行 kneron_plus_v1.3.0 內 原來的範例(沒有修改過的 python scripts) 是否就會出現問題。

python scripts eg. KL520DemoGenericInferencePostYolo.py,

KL520DemoCamGenericInferenceDropFrame.py

也想請您描述一下您在 Virtualbox+ubuntu18.04 是遇到那些問題呢，是你前面所描述的問題（下述的錯誤訊息）嗎？

"Error: upload model failed, error = 'Error raised in function: load_model_from_file. Error code: -7. Description: ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7'"

然後提醒您 KL520 dongle 不用特別將 firmware 燒入到 Flash，您只要透過此 Kneron API (kp.core.load_firmware_from_file) upload firmware 到 Dongle 上就可以了，所以把 uplaod Firmware 的 code 註解掉是不行的。

kp.core.load_firmware_from_file(device_group=device_group,
                                        scpu_fw_path=SCPU_FW_PATH,
                                        ncpu_fw_path=NCPU_FW_PATH)

巫虹葦 · April 2022

Hi

原來的範例(沒有修改過的 python scripts) 下

(1) Virtual box + Ubuntu 18.04

python scripts eg. KL520DemoGenericInferencePostYolo.py,

出現

[connect device]

success

[set Device timeout]

success

[Upload Firmware]

Error code 10 ApiReturnCode.KP_DEVICE_NOT_EXIST_10

Segmentation fault (core dumped)

因為我一開始就遇到Upload Firmware失敗，所以我直接跳過Upload Firmware直接upload model，所以我一開始的問題才會是

[Upload Model]

Error: upload model failed, error = 'Error raised in function: load_model_from_file. Error code: -7. Description: ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7'

因為環境是VirtualBox，排除環境的問題後，才改成在win10上嘗試，才有下一個問題.

在win10上使用時候，有發現[Upload Firmware]的階段，會出現USB dongle unplug-in -> plug-in 的現象，再猜想在Virtual box + Ubuntu 18.04環境[Upload Firmware]時候，unplug-in後沒有自動plug-in上來才會出現 Error code 10 ApiReturnCode.KP_DEVICE_NOT_EXIST_10, 因為出現這個error後lsusb就看不到這個裝置了，必須手動拔插一次才認得到USB裝置, 因為有這些問題，所以就暫時不關注在環境上，改成用win10 + python3.6嘗試

(2) win10 + python3.6

python scripts eg. KL520DemoGenericInferencePostYolo.py, - 正常沒有問題

python KL520DemoCamGenericInferenceDropFrame.py - 是可以成功, 但是偶爾3~5秒後, 出現 ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7

Andy Hsieh · April 2022

@巫虹葦

Hi 巫虹葦,

您在兩個環境中

(1) Virtual box + Ubuntu 18.04

(2) win10 + python3.6

執行 kneron_plus_v1.3.0

(1) 您在 Virtual box + Ubuntu 18.04 上可能得先確認 Virtual box 是否有偵測到您的 KL520 dongle，有時候 Virtual box 會突然找不到 device.

還有記得您的 KL520 不要使用以下指令去燒 firmware to flash，請以這個 API ( kp.core.load_firmware_from_file) upload KL520 firmware.

sudo ./KneronDFUT --kl520-flash-boot --port 5 --scpu ../../kneron_plus_v1.3.0/kneron_plus/res/firmware/KL520/kdp2_fw_scpu.bin --ncpu ../../kneron_plus_v1.3.0/kneron_plus/res/firmware/KL520/kdp2_fw_ncpu.bin

(2) 您在 win10 + python3.6 執行 python KL520DemoCamGenericInferenceDropFrame.py，偶爾出現 ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7 的時候，你的 camera 是否有持續的開著，然後螢幕上是否有畫面呢？

巫虹葦 · April 2022

Hello

您好.

(1) 您在 Virtual box + Ubuntu 18.04 上可能得先確認 Virtual box 是否有偵測到您的 KL520 dongle，有時候 Virtual box 會突然找不到 device.

還有記得您的 KL520 不要使用以下指令去燒 firmware to flash，請以這個 API ( kp.core.load_firmware_from_file) upload KL520 firmware.

sudo ./KneronDFUT --kl520-flash-boot --port 5 --scpu ../../kneron_plus_v1.3.0/kneron_plus/res/firmware/KL520/kdp2_fw_scpu.bin --ncpu ../../kneron_plus_v1.3.0/kneron_plus/res/firmware/KL520/kdp2_fw_ncpu.bin

了解.. 不過我在win環境也透過Tool直接做燒錄，並且在win環境下執行KL520DemoGenericInferencePostYolo.py，把upload firmware mark掉，也是可以正常的upload model以及predict，我想我應該燒錄有成功吧 ??

(2) 您在 win10 + python3.6 執行 python KL520DemoCamGenericInferenceDropFrame.py，偶爾出現 ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7 的時候，你的 camera 是否有持續的開著，然後螢幕上是否有畫面呢？

發生這問題時候，python的程式就 crashed，camera畫面也關掉了.

Andy Hsieh · April 2022

@巫虹葦

Hi 巫虹葦,

非必要時，我們並不鼓勵使用者 KL520 dongle 自己燒 firmware to flash，您可以參考以下資料。

1. Introduction

Runtime Upload Firmware (USB Boot)

3. Install Driver for Windows

3.1 Use GUI to Update AI Device

http://doc.kneron.com/docs/#plus_c/introduction/upgrade_ai_device_to_kdp2/#3-kl520-update-to-usb-boot-mode

如果您需要順利成功執行範例，您的 dongle 插上，執行 DFUT GUI 可以看到如下圖

[KL520DemoGenericInferencePostYolo][Error code] ApiReturnCode.KP_ERROR_USB_TIMEOUT_N7

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