Hello,
I'm trying to implement a DFU support into the application, and in order to learn how it works, I'm following the steps at the page developer.nordicsemi.com/.../a00066.html.
The problem is that I cannot switch into the DFU mode. My PCA10028 board ends up in an unresponsive state and I have to reset it.
This is the list of the steps:
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Built the app experiemental_ble_app_hrs_s110_with_dfu_pca10028 using gcc.
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Built a bootloader and flashed both 7.1 SoftDevice and Bootloader to the device using nrRFGo Studio.
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Opened MCP 3.9 and discovered DFU Target. I was able successfully upload the
experiemental_ble_app_hrs_s110_with_dfu_pca10028 hex file, and then discovered Nordic_HRM device in MCP, which means that my bootloader and the app are fine. -
Then I followed steps 2 to 7 from the web page mentioned above: wrote 01-00 to cccd, then 01-04 to DFU Control Point. At this point MCP got disconnected as expected, but I see no DFU Target ... actually I see no device at all ( I pressed "back" and "start discovery" buttons to initiate discovery).
It looks like I'm missing some critical steps that are not in the instructions.
Please help, thanks.
UPD: the problem seems is related to the experiemental_ble_app_hrs_s110_with_dfu_pca10028 built with GCC. If I build it using Keil, DFU works as described.
