RetroPie

 > jstest /dev/input/js0

 input_player1_a_btn = 1
 input_player1_b_btn = 2
 input_player1_y_btn = 3
 input_player1_x_btn = 0
 input_player1_start_btn = 7
 input_player1_select_btn = 6
 input_player1_left_axis = -0
 input_player1_right_axis = +0
 input_player1_up_axis = -1
 input_player1_down_axis = +1

### Pairing PS3 BlueTooth

 > cd /opt/retropie/supplementary/ps3controller/
 > sudo hciconfig hci0 reset
 > sudo ./sixpair 

### RetroPie Configuration Files

 Start config
    > /boot/config.txt
 Starup Script
    > /etc/rc.local 
 RetroPie Setup Script
    > ./retropie_setup.sh
 Retroarch configuration file
    > /opt/retropie/configs/all/retroarch.cfg
 Joypad Autoconfig
    > /opt/retropie/emulators/retroarch/configs/

 PS3 configuration file
    > /home/pi/.emulationstation/es_input.cfg
    Sony PlayStation 3 Sixaxis controller buttons
       4 = UP
       6 = DOWN
       7 = LEFT
       5 = RIGHT
       13 = A (or circle)
       14 = B (or X)
       3 = START
       0 = SELECT
    input_player1_joypad_index = "0"
    input_player1_a_btn = "13"
    input_player1_b_btn = "14"
    input_player1_x_btn = "12"
    input_player1_y_btn = "15"
    input_player1_l_btn = "10"
    input_player1_r_btn = "11"
    input_player1_l2_btn = "8"
    input_player1_r2_btn = "9"
    input_player1_l3_btn = "1"
    input_player1_r3_btn = "2"
    input_player1_start_btn = "3"
    input_player1_select_btn = "0"
    input_player1_left_btn = "7"
    input_player1_up_btn = "4"
    input_player1_right_btn = "5"
    input_player1_down_btn = "6"
    input_player1_l_x_plus_axis = "+0"
    input_player1_l_y_plus_axis = "+1"
    input_player1_l_x_minus_axis = "-0"
    input_player1_l_y_minus_axis = "-1"
    input_player1_r_x_plus_axis = "+2"
    input_player1_r_y_plus_axis = "+3"
    input_player1_r_x_minus_axis = "-2"
    input_player1_r_x_minus_axis = "-3"
    input_exit_emulator_btn = "16"

 PS3 configuration file
    > /home/pi/.emulationstation/es_input.cfg
       <?xml version="1.0"?>
          <inputList>
          <inputConfig type="joystick" deviceName="Sony PLAYSTATION(R)3 Controller" deviceGUID="030000004c0500006802$
          <input name="a" type="button" id="14" value="1" />
          <input name="b" type="button" id="13" value="1" />
          <input name="down" type="button" id="6" value="1" />
          <input name="left" type="button" id="7" value="1" />
          <input name="pagedown" type="button" id="8" value="1" />
          <input name="pageup" type="button" id="10" value="1" />
          <input name="right" type="button" id="5" value="1" />
          <input name="select" type="button" id="0" value="1" />
          <input name="start" type="button" id="3" value="1" />
          <input name="up" type="button" id="4" value="1" />
       </inputConfig>
       <inputConfig type="joystick" deviceName="PLAYSTATION(R)3 Controller (04:76:6E:EC:04:FF)" deviceGUID="06000$
          <input name="a" type="button" id="14" value="1" />
          <input name="b" type="button" id="13" value="1" />
          <input name="down" type="button" id="6" value="1" />
          <input name="left" type="button" id="7" value="1" />
          <input name="pagedown" type="button" id="8" value="1" />
          <input name="pageup" type="button" id="10" value="1" />
          <input name="right" type="button" id="5" value="1" />
          <input name="select" type="button" id="0" value="1" />
          <input name="start" type="button" id="3" value="1" />
          <input name="up" type="button" id="4" value="1" />
       </inputConfig>
    </inputList>