Running Timesync Example on Sparkfun Breakout

RE: Running Timesync Example on Sparkfun Breakout

Nick — Tue, 10 Apr 2018 04:19:42 GMT

I don't think I ever did, sorry. I bought the official development boards and used those.

RE: Running Timesync Example on Sparkfun Breakout

kian79 — Tue, 10 Apr 2018 00:48:41 GMT

I am having a similar problem with getting an infinite loop inside log_skip and its not going away. How did you solve this?

RE: Running Timesync Example on Sparkfun Breakout

Nick — Tue, 28 Nov 2017 18:27:31 GMT

Thank you for the help on everything. I will stick to the development kits for now and revisit this. The information has been valuable.

RE: Running Timesync Example on Sparkfun Breakout

Sigurd — Tue, 28 Nov 2017 13:59:04 GMT

APP_UART_TX_EMPTY indicates that UART has completed transmission of all available data in the TX FIFO.

If you are not getting APP_UART_DATA_READY , you are not receiving any data.

A logic analyzer (e.g. Saleae) could help with further debugging.

RE: Running Timesync Example on Sparkfun Breakout

Nick — Fri, 24 Nov 2017 05:31:30 GMT

I see the APP_UART_TX_EMPTY event in the uart_event_handler when trying to send something from the UART app.

I do not see the APP_UART_DATA_READY event when sending something via Termite to the board.

I see both of these events with the DK.

RE: Running Timesync Example on Sparkfun Breakout

Nick — Fri, 24 Nov 2017 05:20:54 GMT

I can use the Sparkfun board with the Beefy 3 for serial communication in an Arduino sketch. The leds come on when receiving and transmitting.

When I try to use it with the time sync demo, I do get the rx led when sending from Termite, but I do not see it appear in the nRF Toolbox UART app. I do not get the tx led when trying to send from the nRF Toolbox UART app. The app works with the DK.

RE: Running Timesync Example on Sparkfun Breakout

Sigurd — Thu, 23 Nov 2017 13:44:53 GMT

Do you have the Beefy 3 model with rx/tx leds? Do they light ? Also double check your connections/pins. Maybe installing the FTDI drivers helps ?

RE: Running Timesync Example on Sparkfun Breakout

Nick — Thu, 23 Nov 2017 04:48:51 GMT

One interesting note is even though flow_control is set to APP_UART_FLOW_CONTROL_DISABLED in the project, I had to enable RTS/CTS in Termite in order to send messages to the DK. I could receive messages with or without flow control set.

RE: Running Timesync Example on Sparkfun Breakout

Nick — Thu, 23 Nov 2017 04:48:44 GMT

You are right that the RX pin was not being pulled up. I added

nrf_gpio_cfg_input(RX_PIN_NUMBER, NRF_GPIO_PIN_PULLUP);

after the call to APP_UART_FIFO_INIT() This fixed the issue and I can now connect to the device via Bluetooth, thank you.

However, I cannot communicate with the Sparkfun board over serial. I can use Termite with the DK for sending messages back and forth. Doing the same method with the Sparkfun board has nothing showing up. Lowering the baud rate and trying flow control didn't change anything.

RE: Running Timesync Example on Sparkfun Breakout

Sigurd — Wed, 22 Nov 2017 10:35:02 GMT

Are you using flow-control ? Maybe try to enable/disable it? You could also try to reduce the baudrate, and see if that have any effect.

Could it be that you have left the RX line floating? Here is a relevant thread: UART Peripheral Dead?

RE: Running Timesync Example on Sparkfun Breakout

Nick — Tue, 21 Nov 2017 23:15:34 GMT

I am using the Beefy 3 3.3v. I don't have experience with using it for communications so I wouldn't know how to diagnose or fix it.

RE: Running Timesync Example on Sparkfun Breakout

Sigurd — Tue, 21 Nov 2017 08:59:31 GMT

So if the APP_ERROR_HANDLER() is triggered on line 603, you have the event APP_UART_COMMUNICATION_ERROR.

Looking at the app_uart_evt_t::error_communication documentation here, it stated that This field contains the value in the ERRORSRC register for the UART peripheral. This register tells us that the value 4 means that:

Framing error occurred: A valid stop bit is not detected on the serial data input after all bits in a character have been received.

Are you using any USB<->UART bridge on your breakout board?

RE: Running Timesync Example on Sparkfun Breakout

Nick — Tue, 21 Nov 2017 05:52:07 GMT

I have appended the original post with more information and screenshots. I no longer get the previous behavior for some reason. Now I consistenly see an ERROR 4 [NRF_ERROR_NO_MEM]

RE: Running Timesync Example on Sparkfun Breakout

Sigurd — Mon, 20 Nov 2017 11:37:33 GMT

Hi,

Does it make any difference if you turn off logging ? I.e. in sdk_config.h , set NRF_LOG_ENABLED to 0.