Problem with running BLE DFU example

[arjun]

Dear Nordic,

I am trying to run the BLE DFU example code. I followed the steps as instructed in the infocentre infocenter.nordicsemi.com/index.jsp

This is the way I followed your instructions, please correct me if I am wrong-

Erase the device and flash the softdevice.

Go to examples->dfu->bootloader, and flash the dfu_dual_bank_ble code. (LED 1 and 3 glowing indicating advertising and bootloader mode). Advertises as DFUTARG.

Copied dfu_test_app_hrm zip file to my android phone.

Opened nrf_toolbox,selected the device,selected the zip file and clicked upload.

The problem I am facing is that, upload is not happening, its getting connected and disconnected, and gives GATT_INTERNAL_ERROR

[arjun]

The code works properly when using nrfConnect.

The problem seemed to in setting the clock source.

In pca10040.h, when using clock source as RC oscillator, define parameters as-

{.source = NRF_CLOCK_LF_SRC_RC,
.rc_ctiv = 16,
.rc_temp_ctiv = 4,
.xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_250_PPM}

whereas when using external crystal, .rc_temp_ctiv = 0.

Also ensured that in hci_mem_pool_internal.h, the parameters are defined as following-

TX_BUF_SIZE 4u RX_BUF_SIZE 32u RX_BUF_QUEUE_SIZE 8u.

However I still can,t figure out, where am I going wrong with nrf_toolbox.while uploading its stucking at 33%.

For help with DFU using nrf_connect, pcbreflux.blogspot.in/.../nrf51822-secure-dfu-ota-via-ble.html