unable to open ftdi device: -6 (ftdi_usb_reset failed)

[PedroAntunes178]

Hello,

I am trying to program the IceSugar-pro board. That uses the ECP5 FPGA.
I have encountered several errors.

First, unable to open ftdi device: -3 (device not found) which happened if I called openFPGALoader without --busdev-num. The command I used that bypassed this issue was openFPGALoader --busdev-num 003:005 -c digilent_hs2 blink_100.bit. The bus and the device address can be obtained by executing lsusb.

Second, unable to open ftdi device: -4 (libusb_open() failed) which happened because my user did not have permissions to write to the Serial port. To solve this I followed issue #245 and added the following lines to /etc/udev/rules.d/99-openfpgaloader.rules:

# IceSugar-Pro
ATTRS{idVendor}=="1d50", ATTRS{idProduct}=="602b", MODE="664", GROUP="plugdev", TAG+="uaccess"

The current issue I am having trouble solving is unable to open ftdi device: -6 (ftdi_usb_reset failed). There does not seem to be much information about it.

Any help is appreciated,
Thank you in advance :)

Best,
Pedro

Ps:
openFPGALoader v0.11.0

[trabucayre]

Hello,

First issue:

The second issue give the answer for your first issue: you use -c digilent_hs2. This cable is based on ft232H (with vid:pid = 0x0403:0x6014) but your interface has a vid:pid = 0x1d50:0x602b.

Second issue:

yes you needs to have access right on your USB interface as mentioned here and here.

I'm agree those sections are not much visible.

Last issue:

I haven't an iceSugar-pro but have colorlight i5 (more or less similar) and the interface as mentioned in the iceSugar repo's README is:

the on board debugger iCELink (base on ARM Mbed DAPLink)

This isn't an FTDI (or clone) and you have to use the right protocol.

This is a specific protocol implemented on the onboard microcontroler (U3 in board schematic).
So maybe trying with -b cmsisdap --vid=0x1d50 --pid0x602b will resolve your issue.

[PedroAntunes178]

Hey,

Nice, thank you! :)

The following command line worked:

openFPGALoader -c cmsisdap --vid=0x1d50 --pid=0x602b blink_1000.bit