Dear Sir,
I am using friendly arm mini2440. Inorder to get /dev/ttyUSB0 port
what modules to be included in kernel configuration and any other
things to be done. Please help me.
Thanks In advance.
Please explain more. If you use a USB to RS232 converter, like PL2303 (the free one supplied by ARMWorks when asked), it will enumerate in /dev automatically. What are you trying to do?
I have same problem......... I am using a GPRS modem with usb0 port and its shows on /dev/ttyUSB0... But I want to issue AT command to modem. How I can? help me..
I'm using USB to RS232 converter like PL2303 but I'm unable to cat /dev/ttyUSB0 and other end I'm using hyper terminal with 9600 8N1 setting. please help
With PL2303 unplugged type demsg on the command line, note the devices listed, then plug in PL2303 and type demsg again. What do you see?
mohan: First of all: - what side of your USB/serial converter is connected to your host? - what side of your USB/serial converter is connected to your target? Using "cat" cannot work, because you need to configure your serial line (baudrate and so on). Use a serial terminal at both sides.
Hi Mohan, U r Mistake is the baudrate, the mini2440 will communicate at 115200 baud rate...
Hi Juergen & Sundeep, thanks for reply Pls find the details below USB side is connected to target serial side is connected to com port of PC PC->BAFO(serial to usb adapter , not mini adapter)->mini2440 used picocom at mini2440 and hyper terminal on windows side. Tried with different baud rates 9600 to 115200 using stty -F /dev/ttyUSB0 9600
Hi, dmesg output: usb 1-1: USB disconnect, address 2 pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0 pl2303 1-1:1.0: device disconnected usb 1-1: new full speed USB device using s3c2410-ohci and address 3 usb 1-1: New USB device found, idVendor=067b, idProduct=2303 usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-1: Product: USB 2.0 To COM Device usb 1-1: Manufacturer: Prolific Technology Inc. usb 1-1: configuration #1 chosen from 1 choice pl2303 1-1:1.0: pl2303 converter detected usb 1-1: pl2303 converter now attached to ttyUSB0 stty -F /dev/ttyUSB0: speed 9600 baud; rows 24; columns 80; intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0; -brkint -imaxbel sometimes i get these messages for "dmesg" usb 1-1: new full speed USB device using s3c2410-ohci and address 12 usb 1-1: device not accepting address 12, error -62 usb 1-1: new full speed USB device using s3c2410-ohci and address 13 usb 1-1: device not accepting address 13, error -62 hub 1-0:1.0: unable to enumerate USB device on port 1
I would suggest searching for BAFO, even on this site. I recall people having problems with this brand. As you suggested previously, the mini2440 (Supervivi)is set up to communicate at 115200 baud. Just a minute ... you are running picocom on the mini2440. How did you manage to do that? If you are, have you set it up for the same baudrate as Hyperterm?
ya davef, through telnet I'm able to load picocom and using same baud rate bothe the sides.
> through telnet I'm able to load picocom Interesting, I am not familiar with this process. I assume you cross-compiled picocom for Armv4t then? I checked BAFO on this site and it didn't return anything useful. Although one thread suggests a loopback test to verify its operation. I must have read the negative comments about some BAFO products on another website.
sorry davef, using FTP i load picocom the cross complied arm and through telnet i'm able to use it.
hi Juergen, you were asking usb/serial converter. Any Clue from this usb side to target machine mini2440 serial side to com port of pc. Please let me known if any suggestion
Pin Regular Mini2440
PC
1
2 RxD(i) TxD(o)
3 TxD(o) RxD(i)
4
5
6
7 RTS(o) CTS(i)
8 CTS(i) RTS(o)
9
(i) input (o) output
Do you see the difference? For what kind of DSUB pinout is your USB/serial
connector made?
Hi Mohan, Fine..u just ping me on k.sundeep2007@gmail.com..will solve the problem ur facing. For Serial communication no need of running serial interface(picocom) on arm board.