GPIO library - WiringPi

mariuszb

#include <stdio.h>
#include <wiringPi.h>

#define BLINK_LED 29  //led on port 29

int main()
{
   wiringPiSetup () ;
    pinMode (BLINK_LED, OUTPUT);  //led  

while(1)
{
digitalWrite(BLINK_LED, HIGH);
delay(500);
digitalWrite(BLINK_LED, LOW);
delay(500);
}
}

hieudt

Hello all
I have a Orange pi run Android OS. Please teach me how to use WitingOP for android. I connect GPIO to button and i want build application read event button pressed.
Somebody please help me.
Sorry my english is very bad

iboguslavsky

For standalone PWM (not using Wiring PI). It uses UART0_RX pin on the UART breakout header.

https://github.com/iboguslavsky/pwm-sunxi-opi0.git

Have a look at the examples also.

nopnop2002

iboguslavsky replied at 2017-3-25 06:02
For standalone PWM (not using Wiring PI). It uses UART0_RX pin on the UART breakout header.

https: ...

Thank you so much for your sharing this wonderful project ...
It's can control my servo-motor(SG90)

1. #!/bin/bash
   
2. #enable pwm
   
3. echo 1 > /sys/class/pwm-sunxi-opi0/pwm0/run
   
4. sleep 1
   
5. 
   
6. #set prescale to 200KHz
   
7. cat /sys/class/pwm-sunxi-opi0/pwm0/prescale
   
8. echo 0 > /sys/class/pwm-sunxi-opi0/pwm0/prescale
   
9. sleep 1
   
10. 
    
11. #set entirecycle to 4000
    
12. cat /sys/class/pwm-sunxi-opi0/pwm0/entirecycles
    
13. echo 4000 > /sys/class/pwm-sunxi-opi0/pwm0/entirecycles
    
14. sleep 1
    
15. 
    
16. #Move to Center
    
17. #cat /sys/class/pwm-sunxi-opi0/pwm0/activecycles
    
18. echo 290 > /sys/class/pwm-sunxi-opi0/pwm0/activecycles
    
19. sleep 1
    
20. 
    
21. #Move to Angle -90
    
22. echo 125 > /sys/class/pwm-sunxi-opi0/pwm0/activecycles
    
23. sleep 1
    
24. 
    
25. #Move to Angle +90
    
26. echo 470 > /sys/class/pwm-sunxi-opi0/pwm0/activecycles
    
27. sleep 1
    
28. 
    
29. #Move to Center
    
30. echo 290 > /sys/class/pwm-sunxi-opi0/pwm0/activecycles
    
31. sleep 1
    
32. 
    
33. #disable pwm
    
34. echo 0 > /sys/class/pwm-sunxi-opi0/pwm0/run

Copy code

I have decided to write the wrap function by a C language.

https://github.com/nopnop2002/pwmlib-opi