compiling nrf52-ble-image-transfer-demo

[Larry]

hi,

I have several questions regarding the demo.

1. I tried to load the provided nrf52840_xxaa.hex to PCA100056 with s140 5 alfa, however, no images is transferred

This is the output from device

UART Start!
SPIM - Spi master interface created
SPIM - Spi master interface closed
SPIM: Close - Interface not open
TWIM: Open - TWI master interface created
ARDUCAM - Camera Start
TWIM: Close - Interface closed
SPIM - Spi master interface created
ARDUCAM - eConnected
Data len is set to 0x3D(61), or maybe 64
ATT MTU exchange completed. central 247 peripheral 64
ATT MTU exchange completed. central 247 peripheral 64
Con params updated: CI 6, 6
ATT MTU exchange completed. central 247 peripheral 64
T1S1Con params updated: CI 36, 36
Con params updated: CI 9, 9

It seems like the camera is starting, but the mobile app is not receiving images. I have tried with Samsung Galaxy S6 and Nexus 5x

I connected the camera to P0.13 through P1.09 and VVD to 5V on the right side with GRD connected next to it.

2. How does one build the full application? The provided makefile at github.com/.../nrf52-ble-image-transfer-demo

will fail build because no rules are specified how to build the cpplib. Do you have plans to provide it?

[Jørgen Holmefjord]

Hi,

Did you disconnect the external memory IC on the nRF52840-PDK by cutting SB10-15 and connect the GPIOs to the pin header by soldering SB20-25? This is required if you want to use the pins mentioned in the example. If you do not want to modify your board, you can use pins P0.27->P1.12 on P4 header by setting the define PCA10056_USE_FRONT_HEADER = 0.

The project can be compiled using Keil 5 IDE. It is noted on the GitHub, in the TODO section, that GCC and IAR projects will be updated later.

Best regards,

Jørgen

[chengma]

Hi,

I m trying this repo as well. I have a issue about the compiling: how can I import nrf52 SDK-13 into my project with right path setting? And I have tried mbed online compiler, Keil5 and gcc. They are all hard to import whole folder. Is there any detailed instruction I can follow?

Thank you.

Best, Cheng

[Jørgen Holmefjord]

Which board do you use? For PCA10056, simply download the repo, extract it, and copy the directory nrf52-ble-image-transfer-demo into [SDKv13.0.0\examples\ble_peripheral]. Open the Keil 5 project found in pca10056\s140\arm5_no_packs\ble_app_uart_pca10056_s140.uvprojx. You should now be able to compile the project with correct paths and settings. For PCA10040, the procedure is the same, but you will have to download the softdevice and header files as described here.

[chengma]

Thank you. My board is PCA10040 nrf52832. I have almost built all source files but an error said: the size of this image exceeds the maximum allowed for this version of linker.

[chengma]

I have set optimization level to -O1. So the output is now smaller than 32kb. While I still can't find my device when scanning for scanner on Android (Nexus5, on any ). Do you have any idea about this? Thank you