RPi B+ GPIO reference
2014-10-05 11:31
New setup:
There are different ways to reference GPIO pins, so, here is a table,
resembling WiringPi gpio readall output:
+-----+-----+---------+----+--B Plus--+----+---------+-----+-----+
| BCM | wPi | Name | BL | Physical | BR | Name | wPi | BCM |
+-----+-----+---------+----+----++----+----+---------+-----+-----+
| | | 3V3 | 1 | 1 || 2 | 1 | 5v0 | | |
| 2 | 8 | SDA1 | 2 | 3 || 4 | 2 | 5V0 | | |
| 3 | 9 | SCL1 | 3 | 5 || 6 | 3 | GND | | |
| 4 | 7 | GPIO4 | 4 | 7 || 8 | 4 | TXD0 | 15 | 14 |
| | | GND | 5 | 9 || 10 | 5 | RXD0 | 16 | 15 |
| 17 | 0 | GPIO17 | 6 | 11 || 12 | 6 | GPIO18 | 1 | 18 |
| 27 | 2 | GPIO27 | 7 | 13 || 14 | 7 | GND | | |
| 22 | 3 | GPIO22 | 8 | 15 || 16 | 8 | GPIO23 | 4 | 23 |
| | | 3V3 | 9 | 17 || 18 | 9 | GPIO24 | 5 | 24 |
| 10 | 12 | SPIMOSI | 10 | 19 || 20 | 10 | GND | | |
| 9 | 13 | SPIMISO | 11 | 21 || 22 | 11 | GPIO25 | 6 | 25 |
| 11 | 14 | SPISCLK | 12 | 23 || 24 | 12 | SPICS0 | 10 | 8 |
| | | GND | 13 | 25 || 26 | 13 | SPICS1 | 11 | 7 |
| 0 | 30 | EEDATA | 14 | 27 || 28 | 14 | EECLK | 31 | 1 |
| 5 | 21 | GPIO5 | 15 | 29 || 30 | 15 | GND | | |
| 6 | 22 | GPIO6 | 16 | 31 || 32 | 16 | GPIO12 | 26 | 12 |
| 13 | 23 | GPIO13 | 17 | 33 || 34 | 17 | GND | | |
| 19 | 24 | GPIO19 | 18 | 35 || 36 | 18 | GPIO16 | 27 | 16 |
| 26 | 25 | GPIO26 | 19 | 37 || 38 | 19 | GPIO20 | 28 | 20 |
| | | GND | 20 | 39 || 40 | 20 | GPIO21 | 29 | 21 |
+-----+-----+---------+----+----++----+----+---------+-----+-----+
| BCM | wPi | Name | BL | Physical | BR | Name | wPi | BCM |
+-----+-----+---------+----+--B Plus--+----+---------+-----+-----+
Where:
- Physical - Board pin number
- BL/BR - Breadbord Left/Right pin row number
- Name - T-Cobbler pin name
- wPi - WiringPi library GPIO pin number
- BCM - Broadcom BCM chip GPIO number
And below is RPi B+ GPIO header pinout details, stolen from here
