USB Driver for device

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USB Driver for device

Unread postby gekoch » Wed May 16, 2018 2:12 pm

I have an FTDI Chip for converting a TTL signal to USB for reading in a python application.
However it is really slow so I can't reach a higher transfer rate of around 6kB/s. The FTDI chip should
be capable of doing 1M.
So i dig ariund the Internet and found setserial command.
I tryed to read the IRQ etc. with setserial however there is no IRQ set:
Code: Select all
/dev/ttyUSB0, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency

with the dmesg command I can see that the FTDI chip is recognized
Code: Select all
[ 1526.557077] usb 2-1: new full-speed USB device number 10 using exynos-ohci
[ 1526.789135] usb 2-1: New USB device found, idVendor=0403, idProduct=6015
[ 1526.789142] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1526.789147] usb 2-1: Product: FT231X USB UART
[ 1526.789152] usb 2-1: Manufacturer: FTDI
[ 1526.789157] usb 2-1: SerialNumber: DN01DZ5L
[ 1526.795209] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
[ 1526.795289] usb 2-1: Detected FT-X
[ 1526.799227] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0

When I try to rund the script on a Windows machine I get the anticipated transfer rate...

Do I need to configure this FTDI chip further on a linux machine? (Ubuntu 16)

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Re: USB Driver for device

Unread postby odroid » Wed May 16, 2018 2:23 pm

What happens if you use "minicom" with the FTDI device?
I believe 1Mbps or 3Mbps must be possible on Linux.

BTW, which Kernel version do you use now?
The latest version must be 4.14.40.
Otherwise, update the kernel first with the following instruction. ... st-upgrade
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