| .. | ||
| main.c | ||
| Makefile | ||
| README.md | ||
Program the reset pin for nRF52x CPUs
Simply compile, flash, and run this tool on your nRF52x-based board. It will
program the given RESET_PIN into the NRF_UICR->PSELRESET registers, hence
allowing for hardware resets using a button connected to that pin.
Warning
This tool only works with early nRF52 chips with build codes before Fxx. Later build codes automatically erase the UICR register on each flashing operation.
Context
For nRF52x CPUs, the reset pin is programmable. The reset pin configuration is store in two persistent registers, that are programmed in the same way as the CPUs flash memory.
In most cases, these values should be readily programmed when you get your board, and thus do not need to be touched. However, we have seen however a number of nrf52xxxdk boards, where this was not the case and the on-board reset button did have no effect. Running this tool on those boards solves the issue.