Private Variables
[STM32L476G-DISCOVERY GLASS LCD]

================================================================================
                              GLASS LCD MAPPING
================================================================================
LCD allows to display informations on six 14-segment digits and 4 bars:

  1       2       3       4       5       6
-----   -----   -----   -----   -----   -----   
|\|/| o |\|/| o |\|/| o |\|/| o |\|/|   |\|/|   BAR3
-- --   -- --   -- --   -- --   -- --   -- --   BAR2
|/|\| o |/|\| o |/|\| o |/|\| o |/|\|   |/|\|   BAR1
----- * ----- * ----- * ----- * -----   -----   BAR0

LCD segment mapping:
--------------------
  -----A-----        _ 
  |\   |   /|   COL |_|
  F H  J  K B          
  |  \ | /  |        _ 
  --G-- --M--   COL |_|
  |  / | \  |          
  E Q  P  N C          
  |/   |   \|        _ 
  -----D-----   DP  |_|

 An LCD character coding is based on the following matrix:
COM           0   1   2     3
SEG(n)      { E , D , P ,   N   }
SEG(n+1)    { M , C , COL , DP  }
SEG(23-n-1) { B , A , K ,   J   }
SEG(23-n)   { G , F , Q ,   H   }
with n positive odd number.

 The character 'A' for example is:
  -------------------------------
LSB   { 1 , 0 , 0 , 0   }
      { 1 , 1 , 0 , 0   }
      { 1 , 1 , 0 , 0   }
MSB   { 1 , 1 , 0 , 0   }
      -------------------
  'A' =  F    E   0   0 hexa