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→Specialized GPIO Pins
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−
−{| class="wikitable"
−|+ Raspberry Pi GPIO Pins
−|-
−!Encoder Pin !! Odd Pins !! Webconf !! Function !! Function !! Webconf !!Even Pins !! Encoder Pin
−|-
−| - || Pin 1 || -|| <span style="color:#FFFFFF; background:#aa5500">3v3 Power</span> || <span style="color:#FFFFFF; background:#ff0000">5v0 Power</span> || - || Pin 2 || -
−|-
−| -|| Pin 3 || 8 || <span style="color:#FFFFFF; background:#aaaa00">GPIO 2 I2C SDA</span> || <span style="color:#FFFFFF; background:#ff0000">5v0 Power</span> || - || Pin 4 || -
−|-
−| - || Pin 5 || 9 || <span style="color:#FFFFFF; background:#aaaa00">GPIO 3 I2C SCL</span> || <span style="color:#FFFFFF; background:#000000">0v Ground</span> || - || Pin 6 || 0V
−|-
−| Select B Pin|| Pin 7 || 7 || <span style="color:#FFFFFF; background:#00aa00">GPIO 4</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 14</span> || 15 || Pin 8 || Select A Pin
−|-
−| - || Pin 9 ||-|| <span style="color:#FFFFFF; background:#000000">0v Ground</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 15</span> || 16 || Pin 10 || Select Switch
−|-
−| - || Pin 11 || 0 || <span style="color:#FFFFFF; background:#00aa00">GPIO 17</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 18</span> || 1 || Pin 12 || -
−|-
−| L/S Switch || Pin 13 || 2 || <span style="color:#FFFFFF; background:#aa007f">GPIO 27 FAN Control</span> || <span style="color:#FFFFFF; background:#000000">0v Ground</span> || - || Pin 14|| 0V
−|-
−| L/S B Pin || Pin 15 || 3 || <span style="color:#FFFFFF; background:#00aa00">GPIO 22</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 23</span> || 4|| Pin 16|| L/S A Pin
−|-
−| - || Pin 17 || -|| <span style="color:#FFFFFF; background:#aa5500">3v3 Power</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 24</span> || 5 || Pin 18|| -
−|-
−| - || Pin 19 || 12|| <span style="color:#FFFFFF; background:#00aa00">GPIO 10</span> || <span style="color:#FFFFFF; background:#000000">0v Ground</span> || - || Pin 20|| 0V
−|-
−| - || Pin 21 || 13 || <span style="color:#FFFFFF; background:#00aa00">GPIO 9</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 25</span> || 6 || Pin 22 || -
−|-
−| - || Pin 23 || 14 || <span style="color:#FFFFFF; background:#00aa00">GPIO 11</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 8</span> || 10 || Pin 24|| -
−|-
−| 0V || Pin 25 || - || <span style="color:#FFFFFF; background:#000000">0v Ground</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 7</span> || 11 || Pin 26|| -
−|-
−| - || Pin 27 || 30 || <span style="color:#FFFFFF; background:#00aaff">GPIO 0 (EEPROM SDA)</span> || <span style="color:#FFFFFF; background:#00aaff">GPIO 1 (EEPROM SCL)</span> || 31 || Pin 28|| -
−|-
−| Back B Pin || Pin 29 || 21|| <span style="color:#FFFFFF; background:#00aa00">GPIO 5</span> || <span style="color:#FFFFFF; background:#000000">0v Ground</span> || - || Pin 30|| 0V
−|-
−| Back Switch || Pin 31 || 22 || <span style="color:#FFFFFF; background:#00aa00">GPIO 6</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 12</span> || 26 || Pin 32|| Back A pin
−|-
−| Channel Switch || Pin 33 || 23 || <span style="color:#FFFFFF; background:#00aa00">GPIO 13</span> || <span style="color:#FFFFFF; background:#000000">0v Ground</span> || - || Pin 34 || OV
−|-
−| - || Pin 35 || 24 || <span style="color:#FFFFFF; background:#00aa00">GPIO 19</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 16</span> || 27|| Pin 36|| Channel Pin B
−|-
−| Channel Pin A || Pin 37 || 25 || <span style="color:#FFFFFF; background:#00aa00">GPIO 26</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 20</span> || 28|| Pin 38|| -
−|-
−| OV || Pin39 || -|| <span style="color:#FFFFFF; background:#000000">0v Ground</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 21</span> || 29|| Pin 40|| -
−|}
The Pin that is connected to the Pi edge connector is connected to a range of GPIO Pins that are not in any particular order, and these are subsequently wired to the pins on the BCM processor that does all this work and they have ANOTHER Mapping which the zynthian references. It's done that way to make it processor based not Pi based. There are two settings in software that works on the machine that decides which particular addressing mode is being used.
The Pin that is connected to the Pi edge connector is connected to a range of GPIO Pins that are not in any particular order, and these are subsequently wired to the pins on the BCM processor that does all this work and they have ANOTHER Mapping which the zynthian references. It's done that way to make it processor based not Pi based. There are two settings in software that works on the machine that decides which particular addressing mode is being used.
−The apprpriate pins for the Raspberry Pi pins are listed in the webconf columns.
+The appropriate pins for the Raspberry Pi pins are listed in the webconf columns.
−A confirmed good configuration 17/02/2025
A confirmed good configuration 17/02/2025