dejanb

start clean mesh (first terminal):

$ rm -rf ~/.config/meshcfg/config_db.json
$ sudo rm -rf /var/lib/bluetooth/mesh
$ sudo mkdir /var/lib/bluetooth/mesh
$ sudo /usr/libexec/bluetooth/bluetooth-meshd -nd --debug

provisioner (second terminal):

flatlinebb

Keyboard Control
LEFT and RIGHT
Seek backward/forward 5 seconds. Shift+arrow does a 1 second exact seek (see --hr-seek).
UP and DOWN
Seek forward/backward 1 minute. Shift+arrow does a 5 second exact seek (see  --hr-seek).
Ctrl+LEFT and Ctrl+RIGHT
Seek to the previous/next subtitle. Subject to some restrictions and might not always work; see  sub-seek command.
Ctrl+Shift+Left and Ctrl+Shift+Right
Adjust subtitle delay so that the next or previous subtitle is displayed now. This is especially useful to sync subtitles to audio.
[ and ]

fm4dd

GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd

The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.

-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

num3ric

import numpy as np

def GENP(A, b):
    '''
    Gaussian elimination with no pivoting.
    % input: A is an n x n nonsingular matrix
    %        b is an n x 1 vector
    % output: x is the solution of Ax=b.
    % post-condition: A and b have been modified. 
    '''