On Thu, 2021-12-23 at 14:20 +0000, Curt wrote: > On 2021-12-23, Tixy <[email protected]> wrote: > > > > Still none the wiser of what hardware in the printer you would be > > setting the baud rate of though, but as I'm ignorant of the insides of > > 3D printers perhaps that's not a surprise. > > > > You set the baud rate of the port is how I understand it. > > stty -F /dev/ACM0 115200 >
Yes, but that just sends an ioctl request to the Linux driver which looking at the source code [1] translates it into sending control message to the USB device of type USB_CDC_REQ_SET_LINE_CODING. So what does the 3D printer do when it receives this control packet? What _hardware_ is it actually going to change the baud rate of? I'm assuming here, as I said in my other reply [2], that the USB interface is connected direct to the SoC running the printer, and not to some USB serial adaptor which is then wired to the controlling CPU hardware. [1] See acm_tty_set_termios() in drivers/usb/class/cdc-acm.c [2] https://lists.debian.org/debian-user/2021/12/msg00818.html -- Tixy
