RE: nrf51822 uart example doesn´t work

tobias.poppe — Wed, 13 Apr 2016 10:29:49 GMT

Hi metch, thanks for your response! I didn´t set up eclipse and gdb yet, will try this today. In the meantime i tried the HTS-Example, works fine...

Here is what i do: -Edit the linker script to ram-length 2000 in the armgcc folder (of the example) -Terminal to the armgcc-folder (of the example) -make -copy the s110.hex from the components folder into the build folder -"mergehex -m s110.hex build.hex -o merged-hex" (where build.hex is the freshly made) -"openocd -s /usr/local/Cellar/open-ocd/0.8.0/share/openocd/scripts/ -f interface/stlink-v2.cfg -f target/nrf51.cfg" -second terminal "telnet 127.0.0.1 4444" -"halt", "nrf51 mass_erase", "flash write_image erase mergerd.hex 0", "reset" -connect the iphone app

Surely this takes longer upload time due to the softdevice flashed everytime, but for the first examples i can live with that wait-time...

I´ve done this procedure with the : "ble_app_hrs" example, works fine "ble_app_hts" example, works fine "ble_app_uart" example, can´t find the device in the iphone app

While i trying to set up eclipse, can you maybe try out the uart-example in your toolchain? Maybe the problem is in the SDK10...

Thanks, Tobias

UPDATE: tried the same procedure with the ble_app_rsc example, works fine....

Second UPDATE: i´ve tested the procedure now with SDK11 and S130 instead of S110. The RamLength in the makefile should be 1F80. HRM and HTS works fine, UART no device found....

Third UPDATE: i´ve downloaded SDK 8.0.0, and with this SDK the UART example works as it should...

RE: nrf51822 uart example doesn´t work

Christopher — Tue, 12 Apr 2016 18:18:17 GMT

It is hard/impossible to help you without any code or error logs, sorry. You should debug the application. To do this, my advice would be:

Program the S110 SoftDevice once on the device. You can use nRFgo Studio or the nRF5x-Command-Line-Tools (only compatible with a Segger tools) or OpenOCD with any compatible SWD probe. Have a look at my answer if you are looking to do this with OpenOCD and make. It will be much more faster if you do not need to program the SD each time.
Enable GDB to debug your application (without merging with the SD) using the GNU ARM Eclipse plugin. You will find many tutorial on how configure gdb.

I used the same toolchain as you (I am running Linux). Please post here more details on the error or stack trace.