On 07/25 02:24, R0b0t1 wrote: > On Tue, Jul 25, 2017 at 12:17 PM, <[email protected]> wrote: > > Hi, > > > > (yes, I also have a FTDI USB<=>serial adapter...in this case I need to > > get my CH340 based work) > > > > this drives me crazy... > > > > My CH340G USB<=>serial adaptor is recognized as > > (lsusb) > > Bus 007 Device 011: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial > > adapter > > (dmesg) > > [52255.016438] usb 7-4: new full-speed USB device number 11 using ohci-pci > > [52255.167432] usb 7-4: New USB device found, idVendor=1a86, idProduct=7523 > > [52255.167439] usb 7-4: New USB device strings: Mfr=0, Product=2, > > SerialNumber=0 > > [52255.167443] usb 7-4: Product: USB2.0-Serial > > [52255.169580] ch341 7-4:1.0: ch341-uart converter detected > > [52255.179543] usb 7-4: ch341-uart converter now attached to ttyUSB3 > > > > > > But that's it. > > > > It does not seem to react on any kind of action I try to achieve with > > avrdude (I skipped the arduino IDE to get one variable off this > > eqyitation...). > > > > I instructed avrdude to "speak to the board" like this: > > avrdude -p ATmega2560 -c arduino -P /dev/ttyUSB3 -b 9600 > > > > ...but the only reaction I get is ...timeouts... > > > > I have no clue what to do next. > > > > How can I devide the things which are working so far from those > > which are not working. > > > > The ATmega2560 board is working - I can flash it via buspirate (ICSP). > > I burned a bootloader with that...just to mention...not wanting to > > start an Arduino discussion on a Gentoo mailinglist...only to > > explain the context a little bit... > > > > What is the status of the ch340/ch341 driver? > > (I am running kernel 4.12.3 vanilla right off Linus desktop so to > > say...) > > > > Thanks a lot for any help in advance! > > Cheers > > Meino > > > > If the device creates a /dev node there is probably no issue with the > driver. The default Arduino speed is now 57,600, are you sure 9,600 is > right? Before that it was 38,400. Use the ICSP interface to flash a > program that prints things via serial and see if you can receive them. > If your serial connection is unreliable you will get garbled > characters. > > Avrdude should eventually time out with a message, what is that message? > > I have been experiencing similar problems that you have described with > various Arduino and Arduino-derived boards and so far have not been > able to explain it. Most of the time they work perfectly but some do > not and the bootloader seems to refuse to work. > > R0b0t1. >
Hi R0b0t1, :) thank you very much for your reply! :) Since it will become nevertheless more Android loaden I will respond off list ... Cheers Meino
