[SLN-VIZNAS-IOT] Device not detected on SDP HOST

[oahlzouaoui]

Hi, 

I'm trying to program the SLN-VIZNAS-IOT board using the open boot programming procedure. I made sure that the boot jumper is in the right position (0) and generated correctly my images binaries (bootstrap,bootloader and program) from the SDK without a single change. My signing entity was generated correctly as stated in the Developer Guide. 

When I try to program my board using the script open_prog_full.py it shows an error stating that
ERROR: Could not establish communication with device. Power cycle device.

After checking the device on my host pc using a lsusb command, I can see that my board is there and with the same device ID as in the script 1fc9:0135 I tried to power cycle my device many times but I can not see why the board is not being detected by the SPDHOST in the script. Any suggestions or explanation to this problem ? 

Thank you !

[oahlzouaoui · Accepted solution]

PROBLEM RESOLVED

After investigating the root causes of the previous error, it seems that it is a problem of permission of the Host Computer to access the device. It can simply be resolved by running the script in root mode under the virtual environment. 

[oahlzouaoui]

UPDATE 

After digging deeper in the SDPHOST python package to add more print function for debugging purposes, it seems that the error generated behind is the following : Error: UsbHidPeripheral() cannot open USB HID device (vid=0x1fc9, pid=0x0135, sn=).