This is a GPIO access library for NanoPi. It is based on the WiringOP for Orange PI which is based on original WiringPi for Raspberry Pi.
Currently supported boards: NanoPi Neo NanoPi Neo Air NanoPi Duo NanoPi Duo2 NanoPi NEO2 NanoPi NEO Plus2 NanoPi M1 NanoPi M1 Plus NanoPi NEO Core NanoPi NEO Core2 NanoPi K1 Plus
This repo main intention is to get working WiringNP on Armbian for NanoPi Neo Air.
Before building and installing WiringNP you should do some NanoPi Neo Air preparations:
cd WiringNP/
chmod 755 NPiAir_preparation.sh
sudo ./NPiAir_preparation.sh
sudo is required here because we need to create file /etc/sys_info that will be used by WiringNP as reference.
Log into your nano board via SSH, open a terminal and install the WiringNP library by running the following commands:
git clone https://github.com/friendlyarm/WiringNP
cd WiringNP/
chmod 755 build
./build
The WiringNP library contains a set of gpio commands. Users can use them to access the GPIO pins on a nano board. You can verify your WiringNP by running the following command:
gpio readall
If your installation is successful the following messages will show up. Here is the message list for NanoPi NEO Core:
root@FriendlyARM:~# gpio readall
+-----+-----+----------+------+---+-NanoPi-NEO-Core--+------+----------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+
| | | 3.3v | | | 1 || 2 | | | 5v | | |
| 12 | 8 | GPIOA12 | ALT5 | 0 | 3 || 4 | | | 5v | | |
| 11 | 9 | GPIOA11 | ALT5 | 0 | 5 || 6 | | | 0v | | |
| 203 | 7 | GPIOG11 | OUT | 1 | 7 || 8 | 0 | ALT5 | GPIOG6 | 15 | 198 |
| | | 0v | | | 9 || 10 | 0 | ALT5 | GPIOG7 | 16 | 199 |
| 0 | 0 | GPIOA0 | OUT | 0 | 11 || 12 | 1 | OUT | GPIOA6 | 1 | 6 |
| 2 | 2 | GPIOA2 | OFF | 0 | 13 || 14 | | | 0v | | |
| 3 | 3 | GPIOA3 | OFF | 0 | 15 || 16 | 0 | OFF | GPIOG8 | 4 | 200 |
| | | 3.3v | | | 17 || 18 | 0 | ALT2 | GPIOG9 | 5 | 201 |
| 64 | 12 | GPIOC0 | ALT4 | 0 | 19 || 20 | | | 0v | | |
| 65 | 13 | GPIOC1 | ALT4 | 0 | 21 || 22 | 1 | OUT | GPIOA1 | 6 | 1 |
| 66 | 14 | GPIOC2 | ALT4 | 0 | 23 || 24 | 1 | OUT | GPIOC3 | 10 | 67 |
+-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+----------+------+---+-NanoPi-NEO-Core--+------+----------+-----+-----+
+-----+-----+----------+---- NanoPi-NEO-Core USB/Audio ----+----------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+
| | | 5v | | | 25 || 26 | 0 | ALT4 | GPIOA15 | 22 | 15 |
| | | USB1 | | | 27 || 28 | 0 | ALT4 | GPIOA16 | 23 | 16 |
| | | USB1 | | | 29 || 30 | 0 | ALT4 | GPIOA14 | 21 | 14 |
| | | USB2 | | | 31 || 32 | 0 | ALT4 | GPIOA13 | 20 | 13 |
| | | USB2 | | | 33 || 34 | | | Mic | | |
| | | IR | | | 35 || 36 | | | Mic | | |
| 17 | 19 | GPIOA17 | OFF | 0 | 37 || 38 | | | Audio | | |
| | | I2S | | | 39 || 40 | | | Audio | | |
| | | I2S | | | 41 || 42 | 0 | ALT5 | GPIOA5 | 18 | 5 |
| | | I2S | | | 43 || 44 | 0 | ALT5 | GPIOA4 | 17 | 4 |
| | | I2S | | | 45 || 46 | | | 5V | | |
| | | 0v | | | 47 || 48 | | | 0v | | |
+-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+----------+------+---+-NanoPi-NEO-Core--+------+----------+-----+-----+
+-----+-----+----------+---- NanoPi-NEO-Core Network ----+----------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+
| | | Eth | | | 49 || 50 | | | Eth | | |
| | | Eth | | | 51 || 52 | | | Eth | | |
| | | Eth | | | 53 || 54 | | | Eth | | |
| | | NC | | | 55 || 56 | | | NC | | |
| | | NC | | | 57 || 58 | | | NC | | |
| | | 0v | | | 59 || 60 | | | 0v | | |
| | | USB3 | | | 61 || 62 | 0 | OFF | GPIOA7 | 24 | 7 |
| | | USB3 | | | 63 || 64 | | | GPIOE12 | | |
| | | 5v | | | 65 || 66 | | | GPIOE13 | | |
| | | 5v | | | 67 || 68 | | | 3.3v | | |
+-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+
| BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+-----+-----+----------+------+---+-NanoPi-NEO-Core--+------+----------+-----+-----+
connect a LED module to a NanoPi (Pin7), Make a C source file:
vi test.c
Type the following lines:
#include <wiringPi.h>
int main(void)
{
wiringPiSetup() ;
pinMode (7, OUTPUT) ;
for(;;)
{
digitalWrite(7, HIGH) ;
delay (500) ;
digitalWrite(7, LOW) ;
delay (500) ;
}
}
Compile and run "test.c":
gcc -Wall -o test test.c -lwiringPi -lpthread
sudo ./test
You can see the LED is blinking.
The PWM pin in NanoPi NEO/NEO2 is multiplexing which can be set to either PWM or SerialPort0. To set this pin to PWM you need to run "sudo npi-config" and enter the "Advanced Options" menu to Enable/Disable PWM. Note: after PWM is enabled SerialPort0 will not be accessed and you need to login your board via SSH.
connect a Buzzer to a NanoPi NEO2, create a source file in C:
vi pwmtest.c
Type the following code:
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
int main (void)
{
int l ;
printf ("PWM test program\n") ;
//using wiringPi Pin Number
int pin = 18;
if (wiringPiSetup () == -1)
exit (1) ;
/*
//using Physical Pin Number
int pin = 38;
if (wiringPiSetupPhys() == -1)
exit (1) ;
*/
/*
//using BCM Pin Number
int pin = 5;
if (wiringPiSetupGpio() == -1)
exit (1);
*/
pinMode (pin, PWM_OUTPUT);
for (;;) {
for (l = 0 ; l < 1024 ; ++l) {
pwmWrite (pin, l) ;
delay (1) ;
}
for (l = 1023 ; l >= 0 ; --l) {
pwmWrite (pin, l) ;
delay (1) ;
}
}
return 0 ;
}
Compile the pwmtest.c file and run the generated executable:
gcc -Wall -o pwmtest pwmtest.c -lwiringPi -lpthread
./pwmtest
Connect a PWM beeper to a NEO/NEO2 and the beeper will sound.