How to use the uart unit app test in i.mx6?

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How to use the uart unit app test in i.mx6?

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taehunkim
Contributor II

Dear Sir,

We're testing the uart's operation with the i.mx6 dual lite board.

The Kernel version is "Linux freescale 3.0.35-2666-gbdde708 #6 SMP PREEMPT Mon Feb 16 09:25:50 KST 2015 armv7l GNU/Linux".

And we're using the gnome release package S/W in the i.mx6 dual lite board.

We had found uart unit test app in the gnome release package S/W.

But we think that the app doesn't work well.

Our test result is as follows.

root@freescale /unit_tests$ ./mxc_uart_xmit_test.out /dev/ttymxc2

UART 115200, 8bit, 1stop, PARENB, HW flow disabled

test begin, press 'c' to exit

sent 10000 bytes with speed 102301.790281bps

sent 10000 bytes with speed 102301.790281bps

sent 10000 bytes with speed 102301.790281bps

sent 10000 bytes with speed 102301.790281bps

sent 10000 bytes with speed 102301.790281bps

c

sent 10000 bytes with speed 102432.778489bps

tcount=60000

rcount=0

test exit

root@freescale /unit_tests$

We expect that the rx data will be saved in the uart_read.txt file.

But rcount is 0 and the uart_read.txt file is null.

If there is an additional setting for this test, please let us know.

Sincerely,

Taehun Kim

Research Engineer

LG Electronics

Labels (2)
2 Replies

673 Views
igorpadykov
NXP Employee
NXP Employee

Hi Taehun

had you tried to loopback UART (connect RX with TX),

do you see signals on TX line with oscilloscope ?

Best regards

igor

673 Views
taehunkim
Contributor II

Dear Sir,

We could solve the problem with your advice(connect RX with TX).

Thank you very much.

Sincerely,

Taehun Kim

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