topic Re: app uart in imx233 in i.MX Processors

app uart in imx233

tarique472 — Wed, 04 Apr 2012 09:24:57 GMT

hi all,

i am trying to send the data through serial port(app uart) in imx233.

and running the code in minicom. i got like that.

root@freescale ~$ ./trans

open_port: Unable to open /dev/ttyUSB1 - : No such file or directory
write() of 4 bytes failed!
root@freescale ~$

i think ttyUSB1 is not enable. so waht i have to do. i am new for this platform.

please help me.....thanks in advanced!!!!

Re: app uart in imx233

Balaji_ng — Thu, 03 May 2012 04:15:30 GMT

Hi,

The device you are trying to access is wrong. I dont think it will get exposed as /dev/ttyUSB1. Check how your AppUART is getting exposed in /dev/ directory. I think it will be /dev/ttySP1 or /dev/ttySP0.

Hope this helps.

Regards,

Balaji.V

Re: app uart in imx233

tarique472 — Wed, 09 May 2012 04:34:31 GMT

Balaji said:

Hi,
The device you are trying to access is wrong. I dont think it will get exposed as /dev/ttyUSB1. Check how your AppUART is getting exposed in /dev/ directory. I think it will be /dev/ttySP1 or /dev/ttySP0.
Hope this helps.
Regards,
Balaji.V

Re: app uart in imx233

tarique472 — Wed, 09 May 2012 04:46:49 GMT

tarique:

Hi,

yeah, i changed the terminal /dev/ttyUSB1 to /dev/ttySP0. but after changing

while i am running the application on target, port is opening sucessfully,

but the output is not comming in hyperterminal. so, is there any mistake in code.

thanks in advanced.........

Regards,

Tarique

Re: app uart in imx233

JayZhang — Wed, 09 May 2012 09:07:58 GMT

first, you can check the permission of the node of device...

ls -l /dev/ttyYSB1

Re: app uart in imx233

Balaji_ng — Wed, 09 May 2012 11:09:16 GMT

Hi,

Check the port settings using "stty" tool. Just cross check if you have enabled software flow control in the hyperterminal, as your code has it enabled. I feel there is something to do with your serial port settings.

Regards,

Balaji.V