4.8 KiB
WiringPi (Unofficial Fork)
This is an unofficial mirror/fork of wiringPi. This repository has become a mirror of the last “official” source release, plus a fork facilitating updates to support newer hardware (primarily for use by the ports) and fix bugs.
Notable Updates
I’ve made various updates that I’ve wanted to see for a long time.
- BCM pin numbering is now the default
The WiringPi pin numbering never made any sense to me. Probably because I never really got into Arduino.
I modified the command line options to reflect:
$ gpio -h
Usage: gpio -v Show version info
gpio -h Show Help
gpio[-b|-p|-w] ... Use bcm-gpio/physical/WiringPi pin numbering scheme.
If none specified, BCM GPIO numbering is used by default.
[-x extension:params][[ -x ...]] ...
gpio <mode/read/write/aread/awritewb/pwm/pwmTone/clock> ...
gpio bank <bank>
gpio <toggle/blink> <pin>
gpio readall/allreadall
gpio unexportall/exports
gpio export/edge/unexport ...
gpio wfi <pin> <mode>
gpio mwfi <pin>[,<pin>...] <mode>
gpio drive <group> <value>
gpio pwm-bal/pwm-ms
gpio pwmr <range>
gpio pwmc <divider>
gpio load spi/i2c
gpio unload spi/i2c
gpio i2cd/i2cdetect
gpio rbx/rbd
gpio wb <value>
gpio usbp high/low
- Board version reporting
I’m keeping Gordon’s copyright.
Give credit where credit is due, since this would not exist without his work.
$ gpio -v
gpio version: 2.xx
Copyright (c) 2012-2018 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: "gpio -warranty"
Raspberry Pi Details
Type : Pi 4B
Processor: BCM2711
Revision : 1.4
Memory : 8GB
Maker : Sony
* Device tree is enabled.
* Model string: "Raspberry Pi 4 Model B Rev 1.4"
* This Raspberry Pi supports user-level GPIO access.
- Overall pin reporting
I wanted the readall command to report the current state of pins, their alternate functions, and the names to go with them.
i.e. The pin names aren’t static anymore.
This works on the 3B and 4B. The old A and B should be the same as before. I don’t have any of the other boards,
so I can’t test on those.
In the table below, note that I’ve changed pins 32 and 33 to the alt4 function to be able to use UART5:
$ gpio readall
+-----+-----+------------+------+---+---Pi 4B--+---+------+------------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+------------+------+---+----++----+---+------+------------+-----+-----+
| | | 3.3v | | | 1 || 2 | | | 5v | | |
| 2 | 8 | SDA1 | ALT0 | 1 | 3 || 4 | | | 5v | | |
| 3 | 9 | SCL1 | ALT0 | 1 | 5 || 6 | | | GND | | |
| 4 | 7 | GPIO.04 | OUT | 0 | 7 || 8 | 1 | ALT5 | TXD1 | 15 | 14 |
| | | GND | | | 9 || 10 | 0 | ALT5 | RXD1 | 16 | 15 |
| 17 | 0 | GPIO.17 | OUT | 0 | 11 || 12 | 0 | IN | GPIO.18 | 1 | 18 |
| 27 | 2 | GPIO.27 | IN | 1 | 13 || 14 | | | GND | | |
| 22 | 3 | GPIO.22 | IN | 0 | 15 || 16 | 0 | IN | GPIO.23 | 4 | 23 |
| | | 3.3v | | | 17 || 18 | 0 | IN | GPIO.24 | 5 | 24 |
| 10 | 12 | SPI0_MOSI | ALT0 | 0 | 19 || 20 | | | GND | | |
| 9 | 13 | SPI0_MISO | ALT0 | 0 | 21 || 22 | 0 | IN | GPIO.25 | 6 | 25 |
| 11 | 14 | SPI0_SCLK | ALT0 | 0 | 23 || 24 | 1 | OUT | GPIO.08 | 10 | 8 |
| | | GND | | | 25 || 26 | 1 | OUT | GPIO.07 | 11 | 7 |
| 0 | 30 | GPIO.00 | OUT | 0 | 27 || 28 | 1 | IN | GPIO.01 | 31 | 1 |
| 5 | 21 | GPIO.05 | IN | 1 | 29 || 30 | | | GND | | |
| 6 | 22 | GPIO.06 | IN | 1 | 31 || 32 | 1 | ALT4 | TXD5 | 26 | 12 |
| 13 | 23 | RXD5 | ALT4 | 1 | 33 || 34 | | | GND | | |
| 19 | 24 | GPIO.19 | IN | 1 | 35 || 36 | 1 | IN | GPIO.16 | 27 | 16 |
| 26 | 25 | GPIO.26 | IN | 1 | 37 || 38 | 1 | IN | GPIO.20 | 28 | 20 |
| | | GND | | | 39 || 40 | 1 | IN | GPIO.21 | 29 | 21 |
+-----+-----+------------+------+---+----++----+---+------+------------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+------------+------+---+---Pi 4B--+---+------+------------+-----+-----+
- Added wiringPiISRmulti
This is like the existing wiringPiISR, but it takes a list of pins to wait for.
Note that (for simplicity) the mode applies to all the specified pins.