is it possible to print logs using SWIO and swclk with external devices

[saiteja]

hi, i have downloaded code to nrf52 BLE module using nr52 DK with VTG,SWIO,SWCLK connections. but here i am unable to display the log for nrf52 ble module. is it possible to display printing NRF_LOG on termite or minicom. using SWIO,SWCLK.

thank you.

[endnode]

Hi, no. You need either RTT (special debugging lines, see this) or enable logging over UART and connect specific Tx PIN (+ GND) to some serial cable (typically FTDI "serial to USB" or similar). If you really have only one line left then you can repurpose RESET line to work as standard GPIO and use it for UART Tx PIN but you cannot repurpose SWD lines on nRF52 as far as I can see.

[saiteja]

how to make RESET line to work as standard GPIO and use it for UART Tx PIN.

[bjorn-spockeli]

@saiteja: Do you have only have access to the reset pin or do you have access to other GPIO pins on your BLE module?

[saiteja]

This ble module have have access of TX and Rx pins and SWIO, SWDclk,VDD,GND only

[bjorn-spockeli]

Then you should be able to enable logging over UART, just make sure you configure the TX and RX pins to match the pins on your BLE module.