nRF52832 UART loss data

[Lurn_Z]

Hi everyone:

I use Uart to transport data in FreeRTOS, but when the sender send fast(like 4ms/times), I will loss the data, when i change the time to 20ms, the date will be lost too(only receive little data).

I don't know why, can you give me some advice?

BR

Lurn

[Einarh]

Hello

Please see this link for the nRF52832 UART specification:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fuart.html&cp=5_2_0_49&anchor=concept_dm5_drw_sr

What baud rate are you using?

How many bits do you send per message?

Best regards,

Einar

[Turbo J]

To use UART reliably on a BT-enabled NRF52xxx device, I strongly recommend using the flow control signals (RTS/CTS). Otherwise you will loose data due to interrupts arriving late.

[Lurn_Z]

The baud rate is 921600, and I need sent 32Bytes per message, but when I test it, I send 4 Bytes and data was lost

BR

Lurn

[Lurn_Z]

Sorry, but my hardware device does not support flow control

[Einarh]

Your UART communication might be getting interrupted by BLE communication.

To avoid this you might want to try the UARTE driver, which lets you transmit and receive UART data directly from/to RAM, freeing up the CPU:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fuarte.html&cp=5_2_0_34&anchor=concept_ayq_ycm_wr

-Einar