want to test bidirectional working function in uart

RE: want to test bidirectional working function in uart

awneil — Thu, 18 Jul 2019 10:18:14 GMT

[quote userid="74848" url="~/f/nordic-q-a/49964/want-to-test-bidirectional-working-function-in-uart/199206"]thank its working[/quote]

For the benefit of future readers who may find this because they're having similar problems, please describe what was the actual problem?

Then verify the answer - to show that the question is resolved

[quote userid="74848" url="~/f/nordic-q-a/49964/want-to-test-bidirectional-working-function-in-uart/199206"]one more [/quote]

Start a new thread for a new question!

RE: want to test bidirectional working function in uart

ps_anu — Thu, 18 Jul 2019 10:01:50 GMT

thank its working .. one more how to get a value and put a value by adding up of sum value

example A =cr + 10;

while (app_uart_get(&cr) != NRF_SUCCESS);
while (app_uart_put(A) != NRF_SUCCESS);

RE: want to test bidirectional working function in uart

awneil — Thu, 18 Jul 2019 08:40:35 GMT

So the next thing to test, with that unmodified example on the DK, is that your "TTl uart" (whatever that is) can see the data between the nRF and the DK's onboard USB-to-UART:

               DEV  KIT
+--------------------------------------+
|                                      |
|                                      |
|                                      |
|     +-----+             +------+     |
|     |     |             |      |     |
|     | nRF |<------------| USB  |     |        USB
|     |     |             | to   |<==========================>   PC
|     |     |------+----->| UART |     |
|     |     |      |      |      |     |
|     +-----+      |      +------+     |
|                  |                   |
|                  |                   |
+----------------- | ------------------+
                   |
                   |
                   |
                   |      +-------+
                   |      |       |
                   +----->| "tti" |
                          |       |
                          +-------+

See here for more tips on serial debugging:

https://www.avrfreaks.net/comment/2306116#comment-2306116

https://www.avrfreaks.net/comment/2336161#comment-2336161

Note the use of two terminals - so that you can see both Rx & Tx data ...

And an oscilloscope is invaluable.

RE: want to test bidirectional working function in uart

ps_anu — Thu, 18 Jul 2019 08:31:38 GMT

how to test bidirectional (rx,tx) working using TTL uart

RE: want to test bidirectional working function in uart

ps_anu — Thu, 18 Jul 2019 08:22:48 GMT

yeah its working in development kit

RE: want to test bidirectional working function in uart

awneil — Thu, 18 Jul 2019 08:09:36 GMT

Before making any modifications at all, did you get the example working as-is on a Nordic Dev Kit?

That should always be your first step.