NRF52810 BLE Glitch

[Mike Anti]

Hi!

I'm trying to transfer data from UART to BLE in NRF52810. NRF52810 connects MSP430 controller via UART, MSP430 sends packet of 16 bytes lenght every 2ms (500 times in a second). UART baud rate is 460800 (NRF is uses 0x075F7000 constant).
NRF52810 uses UART with EasyDMA, SDK 16.0. NRF52810 receive packet and transfer it via BLE.
Regulary after transfer start (near 5 second) UART glitch happens - NRF_UARTE_EVENT_ERROR. And one byte from packet is missing.
Test without BLE transfer at 460800 work fine!
Test with BLE transfer at 115200 also work fine!
Test with BLE transfer at 460800 - failed!

What might be a reason? Is there enough performance of NRF52810 for this task?

[Turbo J]

Mike Anti said:

Test with BLE transfer at 115200 also work fine!
Test with BLE transfer at 460800 - failed!

I am actually surprised that 115200 worked with BLE traffic present. Usually that is the point where those hardware flow control signals are absolutely required. Can you use these in your project?

Also try using the highest possible interrupt priority for the UART(E).

[Mike Anti]

I add hardware flow control in the project and test it. At first sight, this seemed to solve the problem. But then the distance between peripheral and cenrtal increase over 5 meters, RTS pin sticks hight level(deactivate) fast enough and stays forever, although receiver FIFO is empty. Only next data transfer makes it low(activete).