Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Fri, 12 May 2017 13:52:27 GMT

Thank all you guys for the help! I think the problem was that it was always in bootload mode and somehow it exit bootload mode and worked! I will try to program another breakout board and figure out why. Thanks again!

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Johannes Lorenz — Fri, 12 May 2017 10:24:31 GMT

Hi, I had a similar issue and to solve it, I powered the breakout board from the nrf DK with common GND: Breakout nrfDK

GND <-> GND

GND <-> SH GND Detect

VDD <-> SH_VTG

SWDIO <-> SH_SWDIO

SWCLK <-> SH_SWDCLK

HTH Johannes

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Mon, 08 May 2017 21:20:30 GMT

It seems that when VTG is connected to power, Keil tries to flush P20 but can't really communicate with it.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Mon, 08 May 2017 20:51:29 GMT

@Keton I took out the FTDI board and used power supply to power the breakout board but it still gives me error. I tried to power from nRF52 DK but the result is the same.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Keton — Mon, 08 May 2017 20:06:36 GMT

@Sylvia without GND and Vcc connected nRF52-DK switches to programming on board nRF52 MCU. Try connecting FTDI board in a way that nothing but vcc and gnd is connected. If that doesn't help try powering Sparkfun board from nRF52-DK (programming header doesn't provide power you have to connect additional Vcc and GND lines from Arduino header on nRF52-DK)

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Mon, 08 May 2017 18:47:31 GMT

It only gives me error when VTG and 3V3 are connected. Did I do anything wrong here?

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Mon, 08 May 2017 18:26:45 GMT

@Keton I'm connecting nRF52 DK P20 VTG--3V3 on breakout board and GND--GND. Vdd on DK is 3.42V. 3V3 on breakout board is 3.27V. Besides power and ground, I'm also connecting swdio and swdclk.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Keton — Mon, 08 May 2017 15:03:34 GMT

@Sylvia this rules out software issues. The problem is most likely in the hardware. Check your connections and boards Vcc level.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Mon, 08 May 2017 14:30:58 GMT

@Jørgen Holmefjord The sparkfun breakout board is connect to my computer through a FTDI board and the LEDs are flashing when nRF52 DK is not connected so I believe it's powered by the computer. I can still program the nRF52 DK when the breakout board is not connected but once it's connected, I can't load program on it. They both have nRF52832.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Sylvia — Mon, 08 May 2017 14:26:54 GMT

@Keton I tried nrfjprog --family nrf52 --recover and it gives my error saying: Recover failed. Please make sure that the correct device family is given and try again. I'm pretty sure that I'm using nRF52 DK. I also tried swapping swdio with swclk but it still gave me error.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Jørgen Holmefjord — Mon, 08 May 2017 10:39:58 GMT

The programming of the external board should be done the same way as you programmed your nRF52 DK. The on-board J-link will detect the external board and flash this if connected and powered correctly. Make sure the external board is powered externally, the four lines from the nRF52 DK does not provide power to the external board.

RE: Program Sparkfun nRF52832 Breakout Board using nRF 52 DK

Keton — Sun, 07 May 2017 13:09:33 GMT

Connection looks ok. Can you do nrfjprog --family nrf52 --recover and see if it gives any errors? Also try swapping swdio with swclk.