Pin 9 and Pin 10 as GPIO with ble_app_buttonless_dfu

[leomarr]

Hi All,

I know this question seems to have been asked many times already but still does not seem to work for us even after checking forum answers.

Hardware: Fanstel BT832 (nRF52832)

Desired function: Pin 9: PWM, PIN 10: GPIO

We initially started development with ble_app_uart as a template. We followed the instruction to add: CONFIG_NFCT_PINS_AS_GPIOS to our SES project options as in this discussion. it works correctly.

We then migrated development over to ble_app_buttonless_dfu as a starting template and we cannot get them to work. We even added the following lines as in other discussions.

const uint32_t UICR_ADDR_0x20C    __attribute__((at(0x1000120C))) __attribute__((used)) = 0xFFFFFFFE;
#define CONFIG_NFCT_PINS_AS_GPIOS

When we go back flash our code with ble_app_uart base, everything is working fine.

Are there other preprocessor definition that must be added in this situation? Or are the any that must be removed?

[Jørgen Holmefjord]

Hi,

Can you check that the UICR register is written correctly?

nrfjprog --memrd 0x1000120C
0x1000120C: FFFFFFFE                              |....|

I tested by setting CONFIG_NFCT_PINS_AS_GPIOS in the ble_app_buttonless_dfu project in SDK 16.0.0, and the UICR register is written correctly.

Best regards,
Jørgen

[leomarr]

Hi Jørgen,

Thank you very much for checking on our issue. I somehow got it to work but I am not sure what the issue was or the solution. I have 3 prototype boards that I have been testing and here is what happened.

1. Opened our modified ble-app-buttonless project (We are on SDK16.0.0) . double check my preprocessor defines commented out extra code below and then flashed on all 3 boards.

const uint32_t UICR_ADDR_0x20C    __attribute__((at(0x1000120C))) __attribute__((used)) = 0xFFFFFFFE;
#define CONFIG_NFCT_PINS_AS_GPIOS

2. Followed your instructions for nrfjprog --memrd 0x1000120C. Error. nrfjprog too old and needed update. Did not get the version prior to update but we orginally were on SDK14.2 for our ble_app_uart base.

3. Download and install nRF-Command-Line-Tools_10_7_0_Installer. No restart.

4. Followed your instructions for nrfjprog --memrd 0x1000120C. Fail. Output 0x1000120C: FFFFFFFF (All three were the same)

5. Clean project, rebuild, flash and check nrfjprog --memrd 0x1000120C again. Fail. Output 0x1000120C: FFFFFFFF

6. Saved work and restarted computer.

7. Opened up original ble-app-buttonless-dfu and changed preprocessor definitions to include CONFIG_NFCT_PINS_AS_GPIOS. Flash on 1 board.

8. Checked nrfjprog --memrd 0x1000120C. Success. Output 0x1000120C: FFFFFFFE

9. Opened my modified ble-app-buttonless-dfu project. Clean, rebuild and flash.

10. Checked nrfjprog --memrd 0x1000120C. It worked. Success. Output 0x1000120C: FFFFFFFE

Tested on all boards and it seems to work consistently now. I suspect that it maybe due to old version of nRF-Command-Line-Tools and restart.