Are you sure, that you selected the right UART port???
It should be
>> /dev/ttyO0
>>
>> or
>> /dev/ttyO1
>>
>> and so on...but not
>> /dev/ttySx
>>
>>
>>
On Tuesday, April 28, 2015 at 9:19:31 PM UTC+2, Peter Hurley wrote:
>
> On 04/27/2015 06:41 AM, JAY KOTHARI wrote:
> > Hi,
> > I am unable to do simple uart communication in BBB. I have set
> device tree
> >
> > uart2_pins: uart2_pins {
> > pinctrl-single,pins = <
> > 0x154 0x01
> > 0x150 0x31
> >>;
> > };
> >
> > &uart2 {
> > status = "okay";
> > pinctrl-names = "default";
> > pinctrl-0 = <&uart2_pins>;
> > };
> >
> > then I configure the UART Port
> >
> > stty -F /dev/ttys0 cstopb -evenp ispeed 115200
> ^^^^^^^^^
> stty: /dev/ttys0: No such file or directory
>
> uart2 is not /dev/ttyS0.
>
> uart0 = /dev/ttyS0
> uart1 = /dev/ttyS1
> uart2 = /dev/ttyS2
>
> Regards,
> Peter Hurley
>
>
> > Then I made a user space application for reading and writing data to
> > device file. I have attached the application program
> >
> > I connected Tx and Rx pin in same BBB.(Loop back mode)
> >
> > But I am not able to do simple UART communication in loop back
> > mode. Do am I missing something? Please help me
>
>
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