why nRF52 DK is getting restarted when rx pin is floating??

RE: why nRF52 DK is getting restarted when rx pin is floating??

Jørgen Holmefjord — Mon, 09 Apr 2018 13:06:04 GMT

To avoid resetting the device when you get the error, you need to avoid passing the error to APP_ERROR_CHECK() in the UART event handler when you get the APP_UART_COMMUNICATION_ERROR event.

RE: why nRF52 DK is getting restarted when rx pin is floating??

Turbo J — Mon, 09 Apr 2018 12:36:34 GMT

Have you tried configuring the RX GPIO in "input pullup" mode?

nrf_gpio_cfg_input(RXD_PIN,NRF_GPIO_PIN_PULLUP);

RE: why nRF52 DK is getting restarted when rx pin is floating??

vprasath — Mon, 09 Apr 2018 11:45:08 GMT

Hi,

I have checked by keeping the oscilloscope in rx pin whether the noise is there on that line ,But when i keep the oscilloscope on the RX pin the device is getting restarted??

How could i solve this problem??

RE: why nRF52 DK is getting restarted when rx pin is floating??

Jørgen Holmefjord — Wed, 04 Apr 2018 10:54:24 GMT

I do not know how this module handles the input, but if it cause errors you will need to ignore the errors until the line is stable. Have you checked the line with a scope, etc., to see if there is noise on the line?

RE: why nRF52 DK is getting restarted when rx pin is floating??

vprasath — Tue, 03 Apr 2018 06:34:36 GMT

Hi ,

I'm getting APP_UART_COMMUNICATION_ERROR in the uart_event_handle.

How do i rectify this error??

My RX pin is connected to Quectel Module,still it is getting APP_UART_COMMUNICATION_ERROR.

Thanks in advance.

RE: why nRF52 DK is getting restarted when rx pin is floating??

Jørgen Holmefjord — Thu, 22 Mar 2018 13:06:24 GMT

Most likely noise on the floating pin is causing errors. Please try debugging and see if you get the event APP_UART_COMMUNICATION_ERROR in uart_event_handle. The error code is passed to APP_ERROR_CHECK, which by default will reset the chip.