Code

The script being discussed in this show is available for download with the previous show: cad-menu.py

Functions

def button0(event):

Play / Pause Button

Print message to lcd and toggle between play and pause for podcasts, then runs init_display to display available options

def button1(event):

Track Information button

Print message to lcd then display current moc track information such as moc state, current time, time left, current playlist number of total playlist number & podcast title.

Example output from command mocp --info

State: PAUSE

File: /home/pi/files/mp3/hpr1597.mp3

Title: Steve Smethurst - HPR1597: Extravehicular Activity (Hacker Public Radio)

Artist: Steve Smethurst

SongTitle: HPR1597: Extravehicular Activity

Album: Hacker Public Radio

TotalTime: 14:11

TimeLeft: 02:47

TotalSec: 851

CurrentTime: 11:24

CurrentSec: 684

Bitrate: 64kbps

AvgBitrate: 64kbps

Rate: 44kHz

def button2(event):

Previous Track Button

Button is only active if button is pushed twice within 0.3 seconds. This was added to stop moving to a new track by accidental pushing of button. If menu = 0 or 1 and value of variable TimeDiff is less than 0.3 then Print message to lcd and move to previous track in playlist. If menu = 2 and button pressed twice within 0.3 then display number of HPR shows in the queue

def button3(event):

Next track Button

Button is only active if button is pushed twice within 0.3 seconds. This was added to stop moving to a new track by accidental pushing of button. If menu = 0 or 1 and value of variable TimeDiff is less than 0.3 then Print message to lcd and move to next track in playlist Button currently has no function if menu = 2

def button4(event):

Toggle backlight Button

If 1st time button is pushed then turn off blinkstick and display main menu else Toggle lcd backlight between on and off

def moc_seek():

Used to seek backward or forward in track being played in mocp SeekPosition is a global variable used to store the current seek position, its value changes up and down when using button6 and button7

def button5(event):

Jogg switch

This button is selected by momentarily pushing in the left/right toggle button. Button located on the top of unit

If menu equals 0 or 1, [PODCASTS or AUDIOBOOKS] menu then

if not in seek menu then display seek menu

if in seek menu then jump forward or back in track by the amount currently displayed on the seek menu, uses function moc_seek()

If menu equals 2, [SYSTEM] menu then

Get date and time information, Clear screen, turn on LCD backlight print the shutdown message with date and time info to lcd & then issue the shutdown command

def button6(event):

Left Jogg switch decrement through menus also used during seek

This button is selected by momentarily pushing the toggle switch to the left. Button located on the top of unit

Button only active if more than 0.3 seconds has passed since it was last pushed, this was added to get around switch bounce causing multiple jumps in menu, think left and right jogg switch is a bit noisy.

If in seek menu

SeekPosition decrements by one until SeekMin is reached, and then returns to 0

each time the display is updated with the decremented value stored in dictionary SeekDisplay

If not in seek menu

Menu decrements down by one unt