Bootloader + Buttonless DFU on Custom Board

RE: Bootloader + Buttonless DFU on Custom Board

bjorn-spockeli — Wed, 14 Jun 2017 11:35:18 GMT

No, the led indication is done by using the GPIO abstraction(nrf_gpio.h), i.e. nrf_gpio_pin_clear and nrf_gpio_pin_set, which does not have any weak implementations that you can override. Are you using I/O expanders that communicate over I2C? You should be able to replace the nrf_gpio_pin_set/clear function calls with a function that communicates with the IO expander without affecting the functionality of the bootloader.

RE: Bootloader + Buttonless DFU on Custom Board

Rodrigo Lorenzo Leal — Wed, 14 Jun 2017 09:29:14 GMT

Bjørn, thanks for your reply.

We added the define to our custom board header file and it worked. The problem is that since we don't have any LED connected directly to the pins of the MCU, we have to assign them to an unused pin and we loose the indication on bootloader mode. Is there a way of overriding the indication on the nrf_ble_dfu library without actually modifying the source code?

RE: Bootloader + Buttonless DFU on Custom Board

bjorn-spockeli — Tue, 13 Jun 2017 13:38:37 GMT

Hi Rodrigo, you should create a custom_board.h file that maps the pins of your custom board to BSP_LED_n and BSP_BUTTON_n and add the BOARD_CUSTOM define to your Makefile.