BL652 EVK Crystal Problem

[enkavak]

Hello,

      I am working with the BL652 EVK from LAIRD. The EVK has nRF52832 IC inside of the module. I downloaded the "nRF5_SDK_15.0.0_a53641a" and trying to use "ble_app_uart_pca10040_s132” application. This application is for nRF52832 with external crystal. The EVK that I use does not have an external crystal. I modified the code like below. However, I can not successfully run the code in the MCU. What could be the problem ? Can anyone help ?

nrf_clock_lf_cfg_t const clock_lf_cfg =

    {

        .source       = 0,

        .rc_ctiv      = 16,

        .rc_temp_ctiv = 2,

        .accuracy     = NRF_SDH_CLOCK_LF_ACCURACY

    };

[Stian Røed Hafskjold]

Are you not able to set a breakpoint in top of main? You should be able to debug the code even with the wrong LF clock settings. The LF clock is not started until softdevice init.

Maybe you can post your hex file here. Then I can try to debug it and see if it hardfaults.

[enkavak]

Hello, picben

     I set a breakpoint in the main but nothing has changed. I can not debug the code.

     I have attached my compiled hex file. How will you debug the code by using hex file?

ble_app_uart_pca10040e_s112.hex

[Stian Røed Hafskjold]

Then I suspect there's something else going on. Have you tried flashing the blinky example which does not use softdevice? Just to see if it the HW is actually working.

Sorry, didn't mean to debug, just check if the code is not hardfaulting or something.

[enkavak]

Hello Stian

      I use the code in the below path. 

     "nRF5_SDK\examples\peripheral\blinky\pca10040\s132\ses"

     When I use "Build and Run", the LEDs are blinking. However, When I use "Build and Debug", I can not debug the code and LEDs are not blinking.

[Stian Røed Hafskjold]

Ok, so just to summarize here:

• You have a ble_app_uart application with external crystal that runs fine on a pca10040 DK
• The ble_app_uart application does not run on the BL652, even if you change to LFRC.
• ble_app_blinky does run on the BL652 but debugging is not working.
• From the debug window it seems like you are running a bootloader? Since you have code in the 0x7F000 area.

Are you using bootloader? Maybe you flashed the bootloader in an earlier project and that you have never fully erased the chip afterwards? Then the previous values in UICR will redirect to the bootloader region, even though the code you are running now does not use the bootloader.

Try to fully erase the chip. Open a terminal (cmd) and write: nrfjprog --eraseall

What do you mean with "I can not debug the code". Do you get any errors? Are you unable to set breakpoints, or does it never reach the breakpoints you set?

 

[enkavak]

Hello Stian,

       I fully erased the chip. Now I can debug the code successfully. Thanks a lot.

[Stian Røed Hafskjold]

Ok, I'm glad it worked!