Make private functions static
Allocate buffers on stack
Move constants out of header

Adds an option to write a btsnoop compatible log file containing BLE
traffic. A new file is created after each boot if BLE is activated and
the `ble_log_enable` option is set in `card10.cfg`. The last 10 logs are
kept via log rotation.

Signed-off-by: Rahix <rahix@rahix.de>

Jakob authored 5 years ago and Arist committed 5 years ago

Get samples from FIFO by small junks due to a recommendation from Maxim
not to read the entire FIFO, but rather a fixed number of samples.
See https://os.mbed.com/users/laserdad/code/MAX86150_ECG_PPG//file/3c728f3d1f10/main.cpp/



Additional tuning for particular configuration of max86150 in card10.

Co-Authored-by: Arist <aristkojevnikov@gmail.com>

Signed-off-by: Rahix <rahix@rahix.de>

Signed-off-by: Rahix <rahix@rahix.de>

Disable the `unused-parameter` warning for the mpy-cross-wrapper to
silence an error about `argc` being unused (which is ok).

Signed-off-by: Rahix <rahix@rahix.de>

Fix the following warning:

    lib/sdk/Libraries/Boards/card10/Source/board.c: In function 'Board_Init':
    lib/sdk/Libraries/Boards/card10/Source/board.c:102:19: warning:
             comparison of integer expressions of different signedness:
             'int' and 'unsigned int' [-Wsign-compare]
      102 |     for (i = 0; i < num_pins; i++) {
          |                   ^

Signed-off-by: Rahix <rahix@rahix.de>