AM1808 usb_dev_serial example on linux

Dean V

Trying to get the usb_dev_serial example to work under linux. When usb cable is plugged in, I see the usb device and I see that it creates a /dev/ttyACM0 port. I then write a simple C application to open this port and write/read to it. I can write to it, and I get breakpoints while debugging the example code in the RxHandler method of Usb_dev_serial.c. Problem is, the only event I ever get is USB_EVENT_DATA_REMAINING, so it never gets to any code which transmits anything back.

1) Am I treating this example properly (reading/writing to /dev/ttyACM0)?

2) Do I need to send special characters in order for this to work?

Any advice would be much appreciated.

Thanks, Dean

over 14 years ago

0 Ajay over 14 years ago

TI__Genius 9460 points

Dean,

Are you running the Linux kernel on AM18x also? Based on description it seems you are running BIOS based used example on AM18x and connecting it to Linux PC.

Ajay

0 Dean V over 14 years ago in reply to Ajay

Prodigy 90 points

Hi Ajay, you are correct - I am running the BIOS based example usb_dev_serial (just loading it through the debug cable), connecting it via USB cable to a linux RHEL5 machine. Can you tell me if I am even using the example properly? Should I be able to read/write the ttyACM0 port, or do I write to that port and read from somewhere else?

Thanks, Dean

0 Pankaj Anand over 14 years ago in reply to Dean V

TI__Prodigy 550 points

Dean,

Can you please provide some information, which BIOSUSB package version are you using?

We don't have USB_DEV_Serial example for BIOSUSB for any version. Please check the package and version to verify this.

Thanks,

Pankaj Anand

0 Dean V over 14 years ago in reply to Pankaj Anand

Prodigy 90 points

Hi Pankaj, The SitaraWare release is 01.00.00.08 and was given to us by our FAE. I've contacted our FAE, and she said that I should work with her on this issue, as this software is not fully released yet.

Thanks, Dean

0 Prashanthi Shivapooja over 13 years ago in reply to Dean V

Intellectual 400 points

Hi Everyone,

We have ported android Froyo on AM1808 processor successfully from sdcard. But my problem is i cant access serial port (read, write) using com port.

I have downloaded android serial port API (.apk file) from link http://code.google.com/p/android-serialport-api/downloads/list . After i installed this .apk file on my android device iam getting force close error.

i have set permissions too.

Can you please help me out in this issue. Thanks in advance.

Regards

Pooja.

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AM1808 usb_dev_serial example on linux