sd_ble_gatts_hvx - Blocking or Non Blocking function

RE: sd_ble_gatts_hvx - Blocking or Non Blocking function

Prithvi — Mon, 15 Jul 2019 13:49:15 GMT

Thanks a lot! It works.

RE: sd_ble_gatts_hvx - Blocking or Non Blocking function

Håkon Alseth — Fri, 12 Jul 2019 12:55:22 GMT

Hi,

It might be that you are doing "just too much" in your interrupt function. Try to shorten your interrupt handler (ie: the uart_evt_handler()) and instead set boolean flags which you handle in your main function for instance.

Kind regards,

Håkon

RE: sd_ble_gatts_hvx - Blocking or Non Blocking function

Prithvi — Fri, 12 Jul 2019 07:39:48 GMT

Thank you for this information!

In my use case have continuous values coming onto the UART lines at 57600 baud rate.

I'm reading these values using app_uart_get() and storing them in an array in the uart_event_handle function. I'm performing parsing on the incoming packets on the UART lines and storing the result of parsing in a data buffer of 20 bytes. I send the values on this buffer through BLE using the sd_ble_gatts_hvx() function.

When I run the code on the board, I get a FIFO ERROR with an error code of 1 or an error code of 4.

When I comment out the sd_ble_gatts_hvx() part of the code in the uart_event_handle function the code runs smoothly and there is no FIFO ERROR.

Could you please let me know if there is a way to avoid this FIFO error while using the sd_ble_gatts_hvx() function?

I cannot afford to drop data.

RE: sd_ble_gatts_hvx - Blocking or Non Blocking function

Håkon Alseth — Fri, 12 Jul 2019 06:56:22 GMT

Hi,

It's non-blocking. It returns the status in a event after the connection interval has finished. For more detailed info, please see this message sequence chart:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v6.1.1/group___b_l_e___g_a_t_t_s___h_v_n___m_s_c.html

Kind regards,

Håkon